401k Plan data: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES plan

EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 401k Plan overview

Plan Name	EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES
Plan identification number	001

EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES Benefits

401k Plan Type

Defined Contribution Pension

Plan Features/Benefits

Profit-sharing
Total participant-directed account plan - Participants have the opportunity to direct the investment of all the assets allocated to their individual accounts, regardless of whether 29 CFR 2550.404c-1 is intended to be met.
Code section 401(k) feature - A cash or deferred arrangement described in Code section 401(k) that is part of a qualified defined contribution plan that provides for an election by employees to defer part of their compensation or receive these amounts in cash.
Code section 401(m) arrangement - Employee contributions are allocated to separate accounts under the plan or employer contributions are based, in whole or in part, on employee deferrals or contribtions to the plan. Not applicable if plan is 401(k) plan with only QNECs and/or QMACs. Also not applicable if Code section 403(b)(1), 403(b)(7) or 408 arrangements/accounts/annuities.
Plan provides for automatic enrollment in plan that has employee contributions deducted from payroll.
Total or partial participant-directed account plan - plan uses default investment account for participants who fail to direct assets in their account.

401k Sponsoring company profile

KOPPERS INC. has sponsored the creation of one or more 401k plans.

Company Name: KOPPERS INC.

Employer identification number (EIN): 251588399

NAIC Classification: 324190

Additional information about KOPPERS INC.

Jurisdiction of Incorporation: Texas Secretary of State

Incorporation Date: 1988-12-21

Company Identification Number: 0007847206

Legal Registered Office Address: 436 7TH AVE STE 1750

PITTSBURGH
United States of America (USA)
15219

More information about KOPPERS INC.

Form 5500 Filing Information

Submission information for form 5500 for 401k plan EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES

Plan id# Filing Submission Date Name of Administrator Date Administrator Signed Name of Company Sponsor Date Sponsor Signed
001 2022-01-01
001 2021-01-01
001 2020-01-01
001 2019-01-01
001 2018-01-01
001 2017-01-01 SHIRLEY A. CHABALIE
001 2016-01-01 SHIRLEY A. CHABALIE
001 2015-01-01 SHIRLEY A. CHABALIE
001 2014-01-01 SHIRLEY CHABALIE SHIRLEY CHABALIE 2015-10-14
001 2013-01-01 SHIRLEY CHABALIE
001 2012-01-01 CHERYL GREC
001 2011-01-01 CHERYL M. GREC
001 2010-01-01 CHERYL M. GREC
001 2009-01-01 CHERYL GREC STEVEN LACY 2010-10-14

Plan Statistics for EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES

401k plan membership statisitcs for EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES

Measure Date Value
2022: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2022 401k membership
Total participants, beginning-of-year 2022-01-01 1,447
Total number of active participants reported on line 7a of the Form 5500 2022-01-01 1,191
Number of retired or separated participants receiving benefits 2022-01-01 28
Number of other retired or separated participants entitled to future benefits 2022-01-01 417
Total of all active and inactive participants 2022-01-01 1,636
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2022-01-01 7
Total participants 2022-01-01 1,643
Number of participants with account balances 2022-01-01 1,557
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2022-01-01 72
2021: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2021 401k membership
Total participants, beginning-of-year 2021-01-01 1,461
Total number of active participants reported on line 7a of the Form 5500 2021-01-01 1,020
Number of retired or separated participants receiving benefits 2021-01-01 22
Number of other retired or separated participants entitled to future benefits 2021-01-01 402
Total of all active and inactive participants 2021-01-01 1,444
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2021-01-01 3
Total participants 2021-01-01 1,447
Number of participants with account balances 2021-01-01 1,397
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2021-01-01 56
2020: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2020 401k membership
Total participants, beginning-of-year 2020-01-01 1,510
Total number of active participants reported on line 7a of the Form 5500 2020-01-01 1,107
Number of retired or separated participants receiving benefits 2020-01-01 6
Number of other retired or separated participants entitled to future benefits 2020-01-01 343
Total of all active and inactive participants 2020-01-01 1,456
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2020-01-01 5
Total participants 2020-01-01 1,461
Number of participants with account balances 2020-01-01 1,439
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2020-01-01 53
2019: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2019 401k membership
Total participants, beginning-of-year 2019-01-01 1,545
Total number of active participants reported on line 7a of the Form 5500 2019-01-01 1,112
Number of retired or separated participants receiving benefits 2019-01-01 0
Number of other retired or separated participants entitled to future benefits 2019-01-01 394
Total of all active and inactive participants 2019-01-01 1,506
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2019-01-01 4
Total participants 2019-01-01 1,510
Number of participants with account balances 2019-01-01 1,496
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2019-01-01 0
2018: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2018 401k membership
Total participants, beginning-of-year 2018-01-01 1,123
Total number of active participants reported on line 7a of the Form 5500 2018-01-01 1,245
Number of retired or separated participants receiving benefits 2018-01-01 6
Number of other retired or separated participants entitled to future benefits 2018-01-01 290
Total of all active and inactive participants 2018-01-01 1,541
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2018-01-01 4
Total participants 2018-01-01 1,545
Number of participants with account balances 2018-01-01 1,125
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2018-01-01 25
2017: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2017 401k membership
Total participants, beginning-of-year 2017-01-01 883
Total number of active participants reported on line 7a of the Form 5500 2017-01-01 856
Number of retired or separated participants receiving benefits 2017-01-01 7
Number of other retired or separated participants entitled to future benefits 2017-01-01 259
Total of all active and inactive participants 2017-01-01 1,122
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2017-01-01 1
Total participants 2017-01-01 1,123
Number of participants with account balances 2017-01-01 1,045
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2017-01-01 23
2016: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2016 401k membership
Total participants, beginning-of-year 2016-01-01 783
Total number of active participants reported on line 7a of the Form 5500 2016-01-01 771
Number of retired or separated participants receiving benefits 2016-01-01 7
Number of other retired or separated participants entitled to future benefits 2016-01-01 104
Total of all active and inactive participants 2016-01-01 882
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2016-01-01 1
Total participants 2016-01-01 883
Number of participants with account balances 2016-01-01 1,147
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2016-01-01 49
2015: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2015 401k membership
Total participants, beginning-of-year 2015-01-01 1,064
Total number of active participants reported on line 7a of the Form 5500 2015-01-01 722
Number of retired or separated participants receiving benefits 2015-01-01 5
Number of other retired or separated participants entitled to future benefits 2015-01-01 56
Total of all active and inactive participants 2015-01-01 783
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2015-01-01 0
Total participants 2015-01-01 783
Number of participants with account balances 2015-01-01 997
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2015-01-01 6
2014: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2014 401k membership
Total participants, beginning-of-year 2014-01-01 650
Total number of active participants reported on line 7a of the Form 5500 2014-01-01 861
Number of retired or separated participants receiving benefits 2014-01-01 6
Number of other retired or separated participants entitled to future benefits 2014-01-01 195
Total of all active and inactive participants 2014-01-01 1,062
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2014-01-01 2
Total participants 2014-01-01 1,064
Number of participants with account balances 2014-01-01 947
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2014-01-01 7
2013: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2013 401k membership
Total participants, beginning-of-year 2013-01-01 656
Total number of active participants reported on line 7a of the Form 5500 2013-01-01 478
Number of retired or separated participants receiving benefits 2013-01-01 0
Number of other retired or separated participants entitled to future benefits 2013-01-01 168
Total of all active and inactive participants 2013-01-01 646
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2013-01-01 4
Total participants 2013-01-01 650
Number of participants with account balances 2013-01-01 595
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2013-01-01 8
2012: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2012 401k membership
Total participants, beginning-of-year 2012-01-01 634
Total number of active participants reported on line 7a of the Form 5500 2012-01-01 480
Number of retired or separated participants receiving benefits 2012-01-01 6
Number of other retired or separated participants entitled to future benefits 2012-01-01 167
Total of all active and inactive participants 2012-01-01 653
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2012-01-01 3
Total participants 2012-01-01 656
Number of participants with account balances 2012-01-01 587
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2012-01-01 7
2011: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2011 401k membership
Total participants, beginning-of-year 2011-01-01 577
Total number of active participants reported on line 7a of the Form 5500 2011-01-01 476
Number of retired or separated participants receiving benefits 2011-01-01 5
Number of other retired or separated participants entitled to future benefits 2011-01-01 151
Total of all active and inactive participants 2011-01-01 632
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2011-01-01 2
Total participants 2011-01-01 634
Number of participants with account balances 2011-01-01 570
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2011-01-01 4
2010: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2010 401k membership
Total participants, beginning-of-year 2010-01-01 601
Total number of active participants reported on line 7a of the Form 5500 2010-01-01 416
Number of retired or separated participants receiving benefits 2010-01-01 4
Number of other retired or separated participants entitled to future benefits 2010-01-01 155
Total of all active and inactive participants 2010-01-01 575
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2010-01-01 2
Total participants 2010-01-01 577
Number of participants with account balances 2010-01-01 510
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2010-01-01 3
2009: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2009 401k membership
Total participants, beginning-of-year 2009-01-01 610
Total number of active participants reported on line 7a of the Form 5500 2009-01-01 435
Number of retired or separated participants receiving benefits 2009-01-01 6
Number of other retired or separated participants entitled to future benefits 2009-01-01 157
Total of all active and inactive participants 2009-01-01 598
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2009-01-01 3
Total participants 2009-01-01 601
Number of participants with account balances 2009-01-01 517
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2009-01-01 8

Measure	Date	Value
2022: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2022 401k membership
Total participants, beginning-of-year	2022-01-01	1,447
Total number of active participants reported on line 7a of the Form 5500	2022-01-01	1,191
Number of retired or separated participants receiving benefits	2022-01-01	28
Number of other retired or separated participants entitled to future benefits	2022-01-01	417
Total of all active and inactive participants	2022-01-01	1,636
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2022-01-01	7
Total participants	2022-01-01	1,643
Number of participants with account balances	2022-01-01	1,557
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2022-01-01	72
2021: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2021 401k membership
Total participants, beginning-of-year	2021-01-01	1,461
Total number of active participants reported on line 7a of the Form 5500	2021-01-01	1,020
Number of retired or separated participants receiving benefits	2021-01-01	22
Number of other retired or separated participants entitled to future benefits	2021-01-01	402
Total of all active and inactive participants	2021-01-01	1,444
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2021-01-01	3
Total participants	2021-01-01	1,447
Number of participants with account balances	2021-01-01	1,397
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2021-01-01	56
2020: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2020 401k membership
Total participants, beginning-of-year	2020-01-01	1,510
Total number of active participants reported on line 7a of the Form 5500	2020-01-01	1,107
Number of retired or separated participants receiving benefits	2020-01-01	6
Number of other retired or separated participants entitled to future benefits	2020-01-01	343
Total of all active and inactive participants	2020-01-01	1,456
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2020-01-01	5
Total participants	2020-01-01	1,461
Number of participants with account balances	2020-01-01	1,439
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2020-01-01	53
2019: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2019 401k membership
Total participants, beginning-of-year	2019-01-01	1,545
Total number of active participants reported on line 7a of the Form 5500	2019-01-01	1,112
Number of retired or separated participants receiving benefits	2019-01-01	0
Number of other retired or separated participants entitled to future benefits	2019-01-01	394
Total of all active and inactive participants	2019-01-01	1,506
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2019-01-01	4
Total participants	2019-01-01	1,510
Number of participants with account balances	2019-01-01	1,496
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2019-01-01	0
2018: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2018 401k membership
Total participants, beginning-of-year	2018-01-01	1,123
Total number of active participants reported on line 7a of the Form 5500	2018-01-01	1,245
Number of retired or separated participants receiving benefits	2018-01-01	6
Number of other retired or separated participants entitled to future benefits	2018-01-01	290
Total of all active and inactive participants	2018-01-01	1,541
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2018-01-01	4
Total participants	2018-01-01	1,545
Number of participants with account balances	2018-01-01	1,125
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2018-01-01	25
2017: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2017 401k membership
Total participants, beginning-of-year	2017-01-01	883
Total number of active participants reported on line 7a of the Form 5500	2017-01-01	856
Number of retired or separated participants receiving benefits	2017-01-01	7
Number of other retired or separated participants entitled to future benefits	2017-01-01	259
Total of all active and inactive participants	2017-01-01	1,122
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2017-01-01	1
Total participants	2017-01-01	1,123
Number of participants with account balances	2017-01-01	1,045
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2017-01-01	23
2016: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2016 401k membership
Total participants, beginning-of-year	2016-01-01	783
Total number of active participants reported on line 7a of the Form 5500	2016-01-01	771
Number of retired or separated participants receiving benefits	2016-01-01	7
Number of other retired or separated participants entitled to future benefits	2016-01-01	104
Total of all active and inactive participants	2016-01-01	882
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2016-01-01	1
Total participants	2016-01-01	883
Number of participants with account balances	2016-01-01	1,147
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2016-01-01	49
2015: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2015 401k membership
Total participants, beginning-of-year	2015-01-01	1,064
Total number of active participants reported on line 7a of the Form 5500	2015-01-01	722
Number of retired or separated participants receiving benefits	2015-01-01	5
Number of other retired or separated participants entitled to future benefits	2015-01-01	56
Total of all active and inactive participants	2015-01-01	783
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2015-01-01	0
Total participants	2015-01-01	783
Number of participants with account balances	2015-01-01	997
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2015-01-01	6
2014: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2014 401k membership
Total participants, beginning-of-year	2014-01-01	650
Total number of active participants reported on line 7a of the Form 5500	2014-01-01	861
Number of retired or separated participants receiving benefits	2014-01-01	6
Number of other retired or separated participants entitled to future benefits	2014-01-01	195
Total of all active and inactive participants	2014-01-01	1,062
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2014-01-01	2
Total participants	2014-01-01	1,064
Number of participants with account balances	2014-01-01	947
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2014-01-01	7
2013: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2013 401k membership
Total participants, beginning-of-year	2013-01-01	656
Total number of active participants reported on line 7a of the Form 5500	2013-01-01	478
Number of retired or separated participants receiving benefits	2013-01-01	0
Number of other retired or separated participants entitled to future benefits	2013-01-01	168
Total of all active and inactive participants	2013-01-01	646
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2013-01-01	4
Total participants	2013-01-01	650
Number of participants with account balances	2013-01-01	595
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2013-01-01	8
2012: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2012 401k membership
Total participants, beginning-of-year	2012-01-01	634
Total number of active participants reported on line 7a of the Form 5500	2012-01-01	480
Number of retired or separated participants receiving benefits	2012-01-01	6
Number of other retired or separated participants entitled to future benefits	2012-01-01	167
Total of all active and inactive participants	2012-01-01	653
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2012-01-01	3
Total participants	2012-01-01	656
Number of participants with account balances	2012-01-01	587
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2012-01-01	7
2011: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2011 401k membership
Total participants, beginning-of-year	2011-01-01	577
Total number of active participants reported on line 7a of the Form 5500	2011-01-01	476
Number of retired or separated participants receiving benefits	2011-01-01	5
Number of other retired or separated participants entitled to future benefits	2011-01-01	151
Total of all active and inactive participants	2011-01-01	632
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2011-01-01	2
Total participants	2011-01-01	634
Number of participants with account balances	2011-01-01	570
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2011-01-01	4
2010: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2010 401k membership
Total participants, beginning-of-year	2010-01-01	601
Total number of active participants reported on line 7a of the Form 5500	2010-01-01	416
Number of retired or separated participants receiving benefits	2010-01-01	4
Number of other retired or separated participants entitled to future benefits	2010-01-01	155
Total of all active and inactive participants	2010-01-01	575
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2010-01-01	2
Total participants	2010-01-01	577
Number of participants with account balances	2010-01-01	510
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2010-01-01	3
2009: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2009 401k membership
Total participants, beginning-of-year	2009-01-01	610
Total number of active participants reported on line 7a of the Form 5500	2009-01-01	435
Number of retired or separated participants receiving benefits	2009-01-01	6
Number of other retired or separated participants entitled to future benefits	2009-01-01	157
Total of all active and inactive participants	2009-01-01	598
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2009-01-01	3
Total participants	2009-01-01	601
Number of participants with account balances	2009-01-01	517
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2009-01-01	8

Financial Data on EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES

Measure	Date	Value
2022 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2022 401k financial data
Unrealized appreciation/depreciation of real estate assets	2022-12-31	$0
Unrealized appreciation/depreciation of other (non real estate) assets	2022-12-31	$0
Total unrealized appreciation/depreciation of assets	2022-12-31	$0
Total transfer of assets to this plan	2022-12-31	$173,177
Total transfer of assets from this plan	2022-12-31	$1,627
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2022-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2022-12-31	$0
Expenses. Interest paid	2022-12-31	$0
Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102	2022-12-31	$0
Total income from all sources (including contributions)	2022-12-31	$-17,839,504
Total loss/gain on sale of assets	2022-12-31	$0
Total of all expenses incurred	2022-12-31	$12,985,700
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2022-12-31	$12,831,735
Expenses. Certain deemed distributions of participant loans	2022-12-31	$-2,555
Value of total corrective distributions	2022-12-31	$0
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2022-12-31	$15,356,489
Value of total assets at end of year	2022-12-31	$156,412,191
Value of total assets at beginning of year	2022-12-31	$187,065,845
Total of administrative expenses incurred including professional, contract, advisory and management fees	2022-12-31	$156,520
Total income from rents	2022-12-31	$0
Total interest from all sources	2022-12-31	$139,856
Total dividends received (eg from common stock, registered investment company shares)	2022-12-31	$2,033,866
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2022-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2022-12-31	$2,033,866
Assets. Real estate other than employer real property at end of year	2022-12-31	$0
Assets. Real estate other than employer real property at beginning of year	2022-12-31	$0
Administrative expenses professional fees incurred	2022-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at end of year	2022-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at beginning of year	2022-12-31	$0
Was this plan covered by a fidelity bond	2022-12-31	Yes
Value of fidelity bond cover	2022-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2022-12-31	No
Were there any nonexempt tranactions with any party-in-interest	2022-12-31	No
Contributions received from participants	2022-12-31	$7,135,295
Participant contributions at end of year	2022-12-31	$3,166,827
Participant contributions at beginning of year	2022-12-31	$2,962,570
Participant contributions at end of year	2022-12-31	$0
Participant contributions at beginning of year	2022-12-31	$0
Assets. Other investments not covered elsewhere at end of year	2022-12-31	$0
Assets. Other investments not covered elsewhere at beginning of year	2022-12-31	$0
Income. Received or receivable in cash from other sources (including rollovers)	2022-12-31	$566,754
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2022-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at end of year	2022-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2022-12-31	$0
Assets. Loans (other than to participants) at end of year	2022-12-31	$0
Assets. Loans (other than to participants) at beginning of year	2022-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2022-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2022-12-31	$0
Other income not declared elsewhere	2022-12-31	$0
Administrative expenses (other) incurred	2022-12-31	$156,520
Liabilities. Value of operating payables at end of year	2022-12-31	$0
Liabilities. Value of operating payables at beginning of year	2022-12-31	$0
Total non interest bearing cash at end of year	2022-12-31	$0
Total non interest bearing cash at beginning of year	2022-12-31	$0
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2022-12-31	No
Income. Non cash contributions	2022-12-31	$0
Value of net income/loss	2022-12-31	$-30,825,204
Value of net assets at end of year (total assets less liabilities)	2022-12-31	$156,412,191
Value of net assets at beginning of year (total assets less liabilities)	2022-12-31	$187,065,845
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2022-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2022-12-31	No
Were any leases to which the plan was party in default or uncollectible	2022-12-31	No
Assets. partnership/joint venture interests at end of year	2022-12-31	$0
Assets. partnership/joint venture interests at beginning of year	2022-12-31	$0
Investment advisory and management fees	2022-12-31	$0
Value of interest in registered invesment companies (eg mutual funds) at end of year	2022-12-31	$76,962,209
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2022-12-31	$101,068,451
Value of interest in pooled separate accounts at end of year	2022-12-31	$0
Value of interest in pooled separate accounts at beginning of year	2022-12-31	$0
Interest on participant loans	2022-12-31	$137,580
Income. Interest from loans (other than to participants)	2022-12-31	$0
Interest earned on other investments	2022-12-31	$0
Income. Interest from US Government securities	2022-12-31	$0
Income. Interest from corporate debt instruments	2022-12-31	$0
Value of interest in master investment trust accounts at end of year	2022-12-31	$0
Value of interest in master investment trust accounts at beginning of year	2022-12-31	$0
Value of interest in common/collective trusts at end of year	2022-12-31	$76,131,123
Value of interest in common/collective trusts at beginning of year	2022-12-31	$82,879,608
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2022-12-31	$152,032
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2022-12-31	$155,216
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2022-12-31	$155,216
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2022-12-31	$2,276
Assets. Value of investments in 103.12 investment entities at end of year	2022-12-31	$0
Assets. Value of investments in 103.12 investment entities at beginning of year	2022-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at end of year	2022-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year	2022-12-31	$0
Expenses. Payments to insurance carriers foe the provision of benefits	2022-12-31	$0
Asset value of US Government securities at end of year	2022-12-31	$0
Asset value of US Government securities at beginning of year	2022-12-31	$0
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2022-12-31	$-23,534,046
Net investment gain/loss from pooled separate accounts	2022-12-31	$0
Net investment gain or loss from common/collective trusts	2022-12-31	$-11,835,669
Net gain/loss from 103.12 investment entities	2022-12-31	$0
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2022-12-31	No
Was there a failure to transmit to the plan any participant contributions	2022-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2022-12-31	No
Assets. Invements in employer securities at end of year	2022-12-31	$0
Assets. Invements in employer securities at beginning of year	2022-12-31	$0
Assets. Value of employer real property at end of year	2022-12-31	$0
Assets. Value of employer real property at beginning of year	2022-12-31	$0
Contributions received in cash from employer	2022-12-31	$7,654,440
Employer contributions (assets) at end of year	2022-12-31	$0
Employer contributions (assets) at beginning of year	2022-12-31	$0
Income. Dividends from preferred stock	2022-12-31	$0
Income. Dividends from common stock	2022-12-31	$0
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2022-12-31	$12,831,735
Asset. Corporate debt instrument preferred debt at end of year	2022-12-31	$0
Asset. Corporate debt instrument preferred debt at beginning of year	2022-12-31	$0
Asset. Corporate debt instrument debt (other) at end of year	2022-12-31	$0
Asset. Corporate debt instrument debt (other) at beginning of year	2022-12-31	$0
Contract administrator fees	2022-12-31	$0
Was the provided the required notice or one of the exceptions to providing the black out period notice applied under 29 CFR 2520.101-3	2022-12-31	No
Assets. Corporate common stocks other than exployer securities at end of year	2022-12-31	$0
Assets. Corporate common stocks other than exployer securities at beginning of year	2022-12-31	$0
Liabilities. Value of benefit claims payable at end of year	2022-12-31	$0
Liabilities. Value of benefit claims payable at beginning of year	2022-12-31	$0
Assets. Value of buildings and other operty used in plan operation at end of year	2022-12-31	$0
Assets. Value of buildings and other operty used in plan operation at beginning of year	2022-12-31	$0
Did the plan have assets held for investment	2022-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2022-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2022-12-31	No
Aggregate proceeds on sale of assets	2022-12-31	$0
Aggregate carrying amount (costs) on sale of assets	2022-12-31	$0
Liabilities. Value of acquisition indebtedness at end of year	2022-12-31	$0
Liabilities. Value of acquisition indebtedness at beginning of year	2022-12-31	$0
Opinion of an independent qualified public accountant for this plan	2022-12-31	Unqualified
Accountancy firm name	2022-12-31	SCHNEIDER DOWNS & CO., INC.
Accountancy firm EIN	2022-12-31	251408703
2021 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2021 401k financial data
Unrealized appreciation/depreciation of real estate assets	2021-12-31	$0
Unrealized appreciation/depreciation of other (non real estate) assets	2021-12-31	$0
Total unrealized appreciation/depreciation of assets	2021-12-31	$0
Total transfer of assets to this plan	2021-12-31	$431,677
Total transfer of assets from this plan	2021-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2021-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2021-12-31	$0
Expenses. Interest paid	2021-12-31	$0
Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102	2021-12-31	$0
Total income from all sources (including contributions)	2021-12-31	$38,223,951
Total loss/gain on sale of assets	2021-12-31	$0
Total of all expenses incurred	2021-12-31	$13,975,978
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2021-12-31	$13,923,438
Expenses. Certain deemed distributions of participant loans	2021-12-31	$13,518
Value of total corrective distributions	2021-12-31	$0
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2021-12-31	$14,747,886
Value of total assets at end of year	2021-12-31	$187,065,845
Value of total assets at beginning of year	2021-12-31	$162,386,195
Total of administrative expenses incurred including professional, contract, advisory and management fees	2021-12-31	$39,022
Total income from rents	2021-12-31	$0
Total interest from all sources	2021-12-31	$144,630
Total dividends received (eg from common stock, registered investment company shares)	2021-12-31	$7,911,965
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2021-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2021-12-31	$7,911,965
Assets. Real estate other than employer real property at end of year	2021-12-31	$0
Assets. Real estate other than employer real property at beginning of year	2021-12-31	$0
Administrative expenses professional fees incurred	2021-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at end of year	2021-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at beginning of year	2021-12-31	$0
Was this plan covered by a fidelity bond	2021-12-31	Yes
Value of fidelity bond cover	2021-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2021-12-31	No
Were there any nonexempt tranactions with any party-in-interest	2021-12-31	No
Contributions received from participants	2021-12-31	$6,447,015
Participant contributions at end of year	2021-12-31	$2,962,570
Participant contributions at beginning of year	2021-12-31	$2,768,631
Participant contributions at end of year	2021-12-31	$0
Participant contributions at beginning of year	2021-12-31	$0
Assets. Other investments not covered elsewhere at end of year	2021-12-31	$0
Assets. Other investments not covered elsewhere at beginning of year	2021-12-31	$0
Income. Received or receivable in cash from other sources (including rollovers)	2021-12-31	$1,510,556
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2021-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at end of year	2021-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2021-12-31	$0
Assets. Loans (other than to participants) at end of year	2021-12-31	$0
Assets. Loans (other than to participants) at beginning of year	2021-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2021-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2021-12-31	$0
Other income not declared elsewhere	2021-12-31	$0
Administrative expenses (other) incurred	2021-12-31	$39,022
Liabilities. Value of operating payables at end of year	2021-12-31	$0
Liabilities. Value of operating payables at beginning of year	2021-12-31	$0
Total non interest bearing cash at end of year	2021-12-31	$0
Total non interest bearing cash at beginning of year	2021-12-31	$0
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2021-12-31	No
Income. Non cash contributions	2021-12-31	$0
Value of net income/loss	2021-12-31	$24,247,973
Value of net assets at end of year (total assets less liabilities)	2021-12-31	$187,065,845
Value of net assets at beginning of year (total assets less liabilities)	2021-12-31	$162,386,195
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2021-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2021-12-31	No
Were any leases to which the plan was party in default or uncollectible	2021-12-31	No
Assets. partnership/joint venture interests at end of year	2021-12-31	$0
Assets. partnership/joint venture interests at beginning of year	2021-12-31	$0
Investment advisory and management fees	2021-12-31	$0
Value of interest in registered invesment companies (eg mutual funds) at end of year	2021-12-31	$101,068,451
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2021-12-31	$141,916,327
Value of interest in pooled separate accounts at end of year	2021-12-31	$0
Value of interest in pooled separate accounts at beginning of year	2021-12-31	$0
Interest on participant loans	2021-12-31	$143,481
Income. Interest from loans (other than to participants)	2021-12-31	$0
Interest earned on other investments	2021-12-31	$0
Income. Interest from US Government securities	2021-12-31	$0
Income. Interest from corporate debt instruments	2021-12-31	$0
Value of interest in master investment trust accounts at end of year	2021-12-31	$0
Value of interest in master investment trust accounts at beginning of year	2021-12-31	$0
Value of interest in common/collective trusts at end of year	2021-12-31	$82,879,608
Value of interest in common/collective trusts at beginning of year	2021-12-31	$17,611,689
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2021-12-31	$155,216
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2021-12-31	$89,548
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2021-12-31	$89,548
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2021-12-31	$1,149
Assets. Value of investments in 103.12 investment entities at end of year	2021-12-31	$0
Assets. Value of investments in 103.12 investment entities at beginning of year	2021-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at end of year	2021-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year	2021-12-31	$0
Expenses. Payments to insurance carriers foe the provision of benefits	2021-12-31	$0
Asset value of US Government securities at end of year	2021-12-31	$0
Asset value of US Government securities at beginning of year	2021-12-31	$0
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2021-12-31	$12,792,697
Net investment gain/loss from pooled separate accounts	2021-12-31	$0
Net investment gain or loss from common/collective trusts	2021-12-31	$2,626,773
Net gain/loss from 103.12 investment entities	2021-12-31	$0
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2021-12-31	No
Was there a failure to transmit to the plan any participant contributions	2021-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2021-12-31	No
Assets. Invements in employer securities at end of year	2021-12-31	$0
Assets. Invements in employer securities at beginning of year	2021-12-31	$0
Assets. Value of employer real property at end of year	2021-12-31	$0
Assets. Value of employer real property at beginning of year	2021-12-31	$0
Contributions received in cash from employer	2021-12-31	$6,790,315
Employer contributions (assets) at end of year	2021-12-31	$0
Employer contributions (assets) at beginning of year	2021-12-31	$0
Income. Dividends from preferred stock	2021-12-31	$0
Income. Dividends from common stock	2021-12-31	$0
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2021-12-31	$13,923,438
Asset. Corporate debt instrument preferred debt at end of year	2021-12-31	$0
Asset. Corporate debt instrument preferred debt at beginning of year	2021-12-31	$0
Asset. Corporate debt instrument debt (other) at end of year	2021-12-31	$0
Asset. Corporate debt instrument debt (other) at beginning of year	2021-12-31	$0
Contract administrator fees	2021-12-31	$0
Was the provided the required notice or one of the exceptions to providing the black out period notice applied under 29 CFR 2520.101-3	2021-12-31	No
Assets. Corporate common stocks other than exployer securities at end of year	2021-12-31	$0
Assets. Corporate common stocks other than exployer securities at beginning of year	2021-12-31	$0
Liabilities. Value of benefit claims payable at end of year	2021-12-31	$0
Liabilities. Value of benefit claims payable at beginning of year	2021-12-31	$0
Assets. Value of buildings and other operty used in plan operation at end of year	2021-12-31	$0
Assets. Value of buildings and other operty used in plan operation at beginning of year	2021-12-31	$0
Did the plan have assets held for investment	2021-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2021-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2021-12-31	No
Aggregate proceeds on sale of assets	2021-12-31	$0
Aggregate carrying amount (costs) on sale of assets	2021-12-31	$0
Liabilities. Value of acquisition indebtedness at end of year	2021-12-31	$0
Liabilities. Value of acquisition indebtedness at beginning of year	2021-12-31	$0
Opinion of an independent qualified public accountant for this plan	2021-12-31	Unqualified
Accountancy firm name	2021-12-31	SCHNEIDER DOWNS & CO., INC.
Accountancy firm EIN	2021-12-31	251408703
2020 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2020 401k financial data
Unrealized appreciation/depreciation of real estate assets	2020-12-31	$0
Unrealized appreciation/depreciation of other (non real estate) assets	2020-12-31	$0
Total unrealized appreciation/depreciation of assets	2020-12-31	$0
Total transfer of assets to this plan	2020-12-31	$67,838
Total transfer of assets from this plan	2020-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2020-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2020-12-31	$0
Expenses. Interest paid	2020-12-31	$0
Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102	2020-12-31	$0
Total income from all sources (including contributions)	2020-12-31	$38,402,589
Total loss/gain on sale of assets	2020-12-31	$0
Total of all expenses incurred	2020-12-31	$10,411,944
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2020-12-31	$10,356,858
Expenses. Certain deemed distributions of participant loans	2020-12-31	$409
Value of total corrective distributions	2020-12-31	$0
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2020-12-31	$14,534,063
Value of total assets at end of year	2020-12-31	$162,386,195
Value of total assets at beginning of year	2020-12-31	$134,327,712
Total of administrative expenses incurred including professional, contract, advisory and management fees	2020-12-31	$54,677
Total income from rents	2020-12-31	$0
Total interest from all sources	2020-12-31	$160,363
Total dividends received (eg from common stock, registered investment company shares)	2020-12-31	$7,589,409
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2020-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2020-12-31	$7,589,409
Assets. Real estate other than employer real property at end of year	2020-12-31	$0
Assets. Real estate other than employer real property at beginning of year	2020-12-31	$0
Administrative expenses professional fees incurred	2020-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at end of year	2020-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at beginning of year	2020-12-31	$0
Was this plan covered by a fidelity bond	2020-12-31	Yes
Value of fidelity bond cover	2020-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2020-12-31	No
Were there any nonexempt tranactions with any party-in-interest	2020-12-31	No
Contributions received from participants	2020-12-31	$6,441,351
Participant contributions at end of year	2020-12-31	$2,768,631
Participant contributions at beginning of year	2020-12-31	$2,506,355
Participant contributions at end of year	2020-12-31	$0
Participant contributions at beginning of year	2020-12-31	$0
Assets. Other investments not covered elsewhere at end of year	2020-12-31	$0
Assets. Other investments not covered elsewhere at beginning of year	2020-12-31	$0
Income. Received or receivable in cash from other sources (including rollovers)	2020-12-31	$1,403,194
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2020-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at end of year	2020-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2020-12-31	$0
Assets. Loans (other than to participants) at end of year	2020-12-31	$0
Assets. Loans (other than to participants) at beginning of year	2020-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2020-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2020-12-31	$0
Other income not declared elsewhere	2020-12-31	$0
Administrative expenses (other) incurred	2020-12-31	$54,677
Liabilities. Value of operating payables at end of year	2020-12-31	$0
Liabilities. Value of operating payables at beginning of year	2020-12-31	$0
Total non interest bearing cash at end of year	2020-12-31	$0
Total non interest bearing cash at beginning of year	2020-12-31	$0
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2020-12-31	No
Income. Non cash contributions	2020-12-31	$0
Value of net income/loss	2020-12-31	$27,990,645
Value of net assets at end of year (total assets less liabilities)	2020-12-31	$162,386,195
Value of net assets at beginning of year (total assets less liabilities)	2020-12-31	$134,327,712
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2020-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2020-12-31	No
Were any leases to which the plan was party in default or uncollectible	2020-12-31	No
Assets. partnership/joint venture interests at end of year	2020-12-31	$0
Assets. partnership/joint venture interests at beginning of year	2020-12-31	$0
Investment advisory and management fees	2020-12-31	$0
Value of interest in registered invesment companies (eg mutual funds) at end of year	2020-12-31	$141,916,327
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2020-12-31	$115,301,617
Value of interest in pooled separate accounts at end of year	2020-12-31	$0
Value of interest in pooled separate accounts at beginning of year	2020-12-31	$0
Interest on participant loans	2020-12-31	$158,823
Income. Interest from loans (other than to participants)	2020-12-31	$0
Interest earned on other investments	2020-12-31	$0
Income. Interest from US Government securities	2020-12-31	$0
Income. Interest from corporate debt instruments	2020-12-31	$0
Value of interest in master investment trust accounts at end of year	2020-12-31	$0
Value of interest in master investment trust accounts at beginning of year	2020-12-31	$0
Value of interest in common/collective trusts at end of year	2020-12-31	$17,611,689
Value of interest in common/collective trusts at beginning of year	2020-12-31	$16,480,434
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2020-12-31	$89,548
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2020-12-31	$39,306
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2020-12-31	$39,306
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2020-12-31	$1,540
Assets. Value of investments in 103.12 investment entities at end of year	2020-12-31	$0
Assets. Value of investments in 103.12 investment entities at beginning of year	2020-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at end of year	2020-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year	2020-12-31	$0
Expenses. Payments to insurance carriers foe the provision of benefits	2020-12-31	$0
Asset value of US Government securities at end of year	2020-12-31	$0
Asset value of US Government securities at beginning of year	2020-12-31	$0
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2020-12-31	$15,915,697
Net investment gain/loss from pooled separate accounts	2020-12-31	$0
Net investment gain or loss from common/collective trusts	2020-12-31	$203,057
Net gain/loss from 103.12 investment entities	2020-12-31	$0
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2020-12-31	No
Was there a failure to transmit to the plan any participant contributions	2020-12-31	No
Has the plan failed to provide any benefit when due under the plan	2020-12-31	No
Assets. Invements in employer securities at end of year	2020-12-31	$0
Assets. Invements in employer securities at beginning of year	2020-12-31	$0
Assets. Value of employer real property at end of year	2020-12-31	$0
Assets. Value of employer real property at beginning of year	2020-12-31	$0
Contributions received in cash from employer	2020-12-31	$6,689,518
Employer contributions (assets) at end of year	2020-12-31	$0
Employer contributions (assets) at beginning of year	2020-12-31	$0
Income. Dividends from preferred stock	2020-12-31	$0
Income. Dividends from common stock	2020-12-31	$0
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2020-12-31	$10,356,858
Asset. Corporate debt instrument preferred debt at end of year	2020-12-31	$0
Asset. Corporate debt instrument preferred debt at beginning of year	2020-12-31	$0
Asset. Corporate debt instrument debt (other) at end of year	2020-12-31	$0
Asset. Corporate debt instrument debt (other) at beginning of year	2020-12-31	$0
Contract administrator fees	2020-12-31	$0
Was the provided the required notice or one of the exceptions to providing the black out period notice applied under 29 CFR 2520.101-3	2020-12-31	No
Assets. Corporate common stocks other than exployer securities at end of year	2020-12-31	$0
Assets. Corporate common stocks other than exployer securities at beginning of year	2020-12-31	$0
Liabilities. Value of benefit claims payable at end of year	2020-12-31	$0
Liabilities. Value of benefit claims payable at beginning of year	2020-12-31	$0
Assets. Value of buildings and other operty used in plan operation at end of year	2020-12-31	$0
Assets. Value of buildings and other operty used in plan operation at beginning of year	2020-12-31	$0
Did the plan have assets held for investment	2020-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2020-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2020-12-31	No
Aggregate proceeds on sale of assets	2020-12-31	$0
Aggregate carrying amount (costs) on sale of assets	2020-12-31	$0
Liabilities. Value of acquisition indebtedness at end of year	2020-12-31	$0
Liabilities. Value of acquisition indebtedness at beginning of year	2020-12-31	$0
Opinion of an independent qualified public accountant for this plan	2020-12-31	Unqualified
Accountancy firm name	2020-12-31	SCHNEIDER DOWNS & CO., INC.
Accountancy firm EIN	2020-12-31	251408703
2019 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2019 401k financial data
Unrealized appreciation/depreciation of real estate assets	2019-12-31	$0
Unrealized appreciation/depreciation of real estate assets	2019-12-31	$0
Unrealized appreciation/depreciation of other (non real estate) assets	2019-12-31	$0
Total unrealized appreciation/depreciation of assets	2019-12-31	$0
Total unrealized appreciation/depreciation of assets	2019-12-31	$0
Total transfer of assets to this plan	2019-12-31	$647,287
Total transfer of assets to this plan	2019-12-31	$647,287
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2019-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2019-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2019-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2019-12-31	$0
Expenses. Interest paid	2019-12-31	$0
Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102	2019-12-31	$0
Expenses. Interest paid	2019-12-31	$0
Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102	2019-12-31	$0
Total income from all sources (including contributions)	2019-12-31	$36,110,449
Total income from all sources (including contributions)	2019-12-31	$36,110,449
Total loss/gain on sale of assets	2019-12-31	$1,659,842
Total loss/gain on sale of assets	2019-12-31	$1,659,842
Total of all expenses incurred	2019-12-31	$11,695,696
Total of all expenses incurred	2019-12-31	$11,695,696
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2019-12-31	$11,591,964
Expenses. Certain deemed distributions of participant loans	2019-12-31	$0
Expenses. Certain deemed distributions of participant loans	2019-12-31	$0
Value of total corrective distributions	2019-12-31	$28
Value of total corrective distributions	2019-12-31	$28
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2019-12-31	$13,382,439
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2019-12-31	$13,382,439
Value of total assets at end of year	2019-12-31	$134,327,712
Value of total assets at end of year	2019-12-31	$134,327,712
Value of total assets at beginning of year	2019-12-31	$109,265,672
Total of administrative expenses incurred including professional, contract, advisory and management fees	2019-12-31	$103,704
Total of administrative expenses incurred including professional, contract, advisory and management fees	2019-12-31	$103,704
Total income from rents	2019-12-31	$0
Total interest from all sources	2019-12-31	$125,176
Total dividends received (eg from common stock, registered investment company shares)	2019-12-31	$4,782,696
Total dividends received (eg from common stock, registered investment company shares)	2019-12-31	$4,782,696
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2019-12-31	No
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2019-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2019-12-31	$4,782,696
Assets. Real estate other than employer real property at end of year	2019-12-31	$0
Assets. Real estate other than employer real property at end of year	2019-12-31	$0
Assets. Real estate other than employer real property at beginning of year	2019-12-31	$0
Assets. Real estate other than employer real property at beginning of year	2019-12-31	$0
Administrative expenses professional fees incurred	2019-12-31	$0
Administrative expenses professional fees incurred	2019-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at end of year	2019-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at end of year	2019-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at beginning of year	2019-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at beginning of year	2019-12-31	$0
Was this plan covered by a fidelity bond	2019-12-31	Yes
Was this plan covered by a fidelity bond	2019-12-31	Yes
Value of fidelity bond cover	2019-12-31	$10,000,000
Value of fidelity bond cover	2019-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2019-12-31	Yes
If this is an individual account plan, was there a blackout period	2019-12-31	Yes
Were there any nonexempt tranactions with any party-in-interest	2019-12-31	No
Contributions received from participants	2019-12-31	$6,005,442
Contributions received from participants	2019-12-31	$6,005,442
Participant contributions at end of year	2019-12-31	$2,506,355
Participant contributions at end of year	2019-12-31	$2,506,355
Participant contributions at beginning of year	2019-12-31	$2,322,351
Participant contributions at beginning of year	2019-12-31	$2,322,351
Participant contributions at end of year	2019-12-31	$0
Participant contributions at end of year	2019-12-31	$0
Participant contributions at beginning of year	2019-12-31	$0
Participant contributions at beginning of year	2019-12-31	$0
Assets. Other investments not covered elsewhere at end of year	2019-12-31	$0
Assets. Other investments not covered elsewhere at end of year	2019-12-31	$0
Assets. Other investments not covered elsewhere at beginning of year	2019-12-31	$0
Income. Received or receivable in cash from other sources (including rollovers)	2019-12-31	$742,214
Income. Received or receivable in cash from other sources (including rollovers)	2019-12-31	$742,214
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2019-12-31	$17,219
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2019-12-31	$17,219
Value of other receiveables (less allowance for doubtful accounts) at end of year	2019-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at end of year	2019-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2019-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2019-12-31	$0
Assets. Loans (other than to participants) at end of year	2019-12-31	$0
Assets. Loans (other than to participants) at end of year	2019-12-31	$0
Assets. Loans (other than to participants) at beginning of year	2019-12-31	$0
Assets. Loans (other than to participants) at beginning of year	2019-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2019-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2019-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2019-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2019-12-31	$0
Other income not declared elsewhere	2019-12-31	$-38,412
Administrative expenses (other) incurred	2019-12-31	$103,704
Administrative expenses (other) incurred	2019-12-31	$103,704
Liabilities. Value of operating payables at end of year	2019-12-31	$0
Liabilities. Value of operating payables at end of year	2019-12-31	$0
Liabilities. Value of operating payables at beginning of year	2019-12-31	$0
Liabilities. Value of operating payables at beginning of year	2019-12-31	$0
Total non interest bearing cash at end of year	2019-12-31	$0
Total non interest bearing cash at end of year	2019-12-31	$0
Total non interest bearing cash at beginning of year	2019-12-31	$0
Total non interest bearing cash at beginning of year	2019-12-31	$0
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2019-12-31	No
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2019-12-31	No
Income. Non cash contributions	2019-12-31	$0
Income. Non cash contributions	2019-12-31	$0
Value of net income/loss	2019-12-31	$24,414,753
Value of net income/loss	2019-12-31	$24,414,753
Value of net assets at end of year (total assets less liabilities)	2019-12-31	$134,327,712
Value of net assets at end of year (total assets less liabilities)	2019-12-31	$134,327,712
Value of net assets at beginning of year (total assets less liabilities)	2019-12-31	$109,265,672
Value of net assets at beginning of year (total assets less liabilities)	2019-12-31	$109,265,672
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2019-12-31	No
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2019-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2019-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2019-12-31	No
Were any leases to which the plan was party in default or uncollectible	2019-12-31	No
Were any leases to which the plan was party in default or uncollectible	2019-12-31	No
Assets. partnership/joint venture interests at end of year	2019-12-31	$0
Assets. partnership/joint venture interests at end of year	2019-12-31	$0
Assets. partnership/joint venture interests at beginning of year	2019-12-31	$0
Assets. partnership/joint venture interests at beginning of year	2019-12-31	$0
Investment advisory and management fees	2019-12-31	$0
Investment advisory and management fees	2019-12-31	$0
Value of interest in registered invesment companies (eg mutual funds) at end of year	2019-12-31	$115,301,617
Value of interest in registered invesment companies (eg mutual funds) at end of year	2019-12-31	$115,301,617
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2019-12-31	$92,011,391
Value of interest in pooled separate accounts at end of year	2019-12-31	$0
Value of interest in pooled separate accounts at end of year	2019-12-31	$0
Value of interest in pooled separate accounts at beginning of year	2019-12-31	$0
Value of interest in pooled separate accounts at beginning of year	2019-12-31	$0
Interest on participant loans	2019-12-31	$125,176
Income. Interest from loans (other than to participants)	2019-12-31	$0
Income. Interest from loans (other than to participants)	2019-12-31	$0
Interest earned on other investments	2019-12-31	$0
Interest earned on other investments	2019-12-31	$0
Income. Interest from US Government securities	2019-12-31	$0
Income. Interest from US Government securities	2019-12-31	$0
Income. Interest from corporate debt instruments	2019-12-31	$0
Income. Interest from corporate debt instruments	2019-12-31	$0
Value of interest in master investment trust accounts at end of year	2019-12-31	$0
Value of interest in master investment trust accounts at end of year	2019-12-31	$0
Value of interest in master investment trust accounts at beginning of year	2019-12-31	$0
Value of interest in master investment trust accounts at beginning of year	2019-12-31	$0
Value of interest in common/collective trusts at end of year	2019-12-31	$16,480,434
Value of interest in common/collective trusts at end of year	2019-12-31	$16,480,434
Value of interest in common/collective trusts at beginning of year	2019-12-31	$14,931,930
Value of interest in common/collective trusts at beginning of year	2019-12-31	$14,931,930
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2019-12-31	$39,306
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2019-12-31	$39,306
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2019-12-31	$0
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2019-12-31	$0
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2019-12-31	$0
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2019-12-31	$0
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2019-12-31	$0
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2019-12-31	$0
Assets. Value of investments in 103.12 investment entities at end of year	2019-12-31	$0
Assets. Value of investments in 103.12 investment entities at end of year	2019-12-31	$0
Assets. Value of investments in 103.12 investment entities at beginning of year	2019-12-31	$0
Expenses. Payments to insurance carriers foe the provision of benefits	2019-12-31	$0
Expenses. Payments to insurance carriers foe the provision of benefits	2019-12-31	$0
Asset value of US Government securities at end of year	2019-12-31	$0
Asset value of US Government securities at beginning of year	2019-12-31	$0
Asset value of US Government securities at beginning of year	2019-12-31	$0
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2019-12-31	$15,832,555
Net investment gain/loss from pooled separate accounts	2019-12-31	$0
Net investment gain/loss from pooled separate accounts	2019-12-31	$0
Net investment gain or loss from common/collective trusts	2019-12-31	$366,153
Net investment gain or loss from common/collective trusts	2019-12-31	$366,153
Net gain/loss from 103.12 investment entities	2019-12-31	$0
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2019-12-31	No
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2019-12-31	No
Was there a failure to transmit to the plan any participant contributions	2019-12-31	No
Was there a failure to transmit to the plan any participant contributions	2019-12-31	No
Has the plan failed to provide any benefit when due under the plan	2019-12-31	No
Has the plan failed to provide any benefit when due under the plan	2019-12-31	No
Assets. Invements in employer securities at end of year	2019-12-31	$0
Assets. Invements in employer securities at end of year	2019-12-31	$0
Assets. Invements in employer securities at beginning of year	2019-12-31	$0
Assets. Invements in employer securities at beginning of year	2019-12-31	$0
Assets. Value of employer real property at end of year	2019-12-31	$0
Assets. Value of employer real property at end of year	2019-12-31	$0
Assets. Value of employer real property at beginning of year	2019-12-31	$0
Contributions received in cash from employer	2019-12-31	$6,634,783
Contributions received in cash from employer	2019-12-31	$6,634,783
Employer contributions (assets) at end of year	2019-12-31	$0
Employer contributions (assets) at end of year	2019-12-31	$0
Employer contributions (assets) at beginning of year	2019-12-31	$0
Employer contributions (assets) at beginning of year	2019-12-31	$0
Income. Dividends from preferred stock	2019-12-31	$0
Income. Dividends from preferred stock	2019-12-31	$0
Income. Dividends from common stock	2019-12-31	$0
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2019-12-31	$11,574,745
Asset. Corporate debt instrument preferred debt at end of year	2019-12-31	$0
Asset. Corporate debt instrument preferred debt at end of year	2019-12-31	$0
Asset. Corporate debt instrument preferred debt at beginning of year	2019-12-31	$0
Asset. Corporate debt instrument preferred debt at beginning of year	2019-12-31	$0
Asset. Corporate debt instrument debt (other) at end of year	2019-12-31	$0
Asset. Corporate debt instrument debt (other) at beginning of year	2019-12-31	$0
Asset. Corporate debt instrument debt (other) at beginning of year	2019-12-31	$0
Contract administrator fees	2019-12-31	$0
Contract administrator fees	2019-12-31	$0
Was the provided the required notice or one of the exceptions to providing the black out period notice applied under 29 CFR 2520.101-3	2019-12-31	Yes
Was the provided the required notice or one of the exceptions to providing the black out period notice applied under 29 CFR 2520.101-3	2019-12-31	Yes
Assets. Corporate common stocks other than exployer securities at end of year	2019-12-31	$0
Assets. Corporate common stocks other than exployer securities at beginning of year	2019-12-31	$0
Liabilities. Value of benefit claims payable at end of year	2019-12-31	$0
Liabilities. Value of benefit claims payable at end of year	2019-12-31	$0
Liabilities. Value of benefit claims payable at beginning of year	2019-12-31	$0
Liabilities. Value of benefit claims payable at beginning of year	2019-12-31	$0
Assets. Value of buildings and other operty used in plan operation at end of year	2019-12-31	$0
Assets. Value of buildings and other operty used in plan operation at end of year	2019-12-31	$0
Assets. Value of buildings and other operty used in plan operation at beginning of year	2019-12-31	$0
Assets. Value of buildings and other operty used in plan operation at beginning of year	2019-12-31	$0
Did the plan have assets held for investment	2019-12-31	Yes
Did the plan have assets held for investment	2019-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2019-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2019-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2019-12-31	No
Aggregate proceeds on sale of assets	2019-12-31	$19,937,458
Aggregate proceeds on sale of assets	2019-12-31	$19,937,458
Aggregate carrying amount (costs) on sale of assets	2019-12-31	$18,277,616
Aggregate carrying amount (costs) on sale of assets	2019-12-31	$18,277,616
Liabilities. Value of acquisition indebtedness at end of year	2019-12-31	$0
Liabilities. Value of acquisition indebtedness at end of year	2019-12-31	$0
Liabilities. Value of acquisition indebtedness at beginning of year	2019-12-31	$0
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2019-12-31	Yes
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2019-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2019-12-31	Disclaimer
Opinion of an independent qualified public accountant for this plan	2019-12-31	Disclaimer
Accountancy firm name	2019-12-31	SCHNEIDER DOWNS & CO., INC.
Accountancy firm name	2019-12-31	SCHNEIDER DOWNS & CO., INC.
Accountancy firm EIN	2019-12-31	251408703
Accountancy firm EIN	2019-12-31	251408703
2018 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2018 401k financial data
Total transfer of assets to this plan	2018-12-31	$96,545
Total income from all sources (including contributions)	2018-12-31	$14,093,822
Total loss/gain on sale of assets	2018-12-31	$170,163
Total of all expenses incurred	2018-12-31	$8,401,199
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2018-12-31	$8,279,967
Value of total corrective distributions	2018-12-31	$103
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2018-12-31	$19,046,260
Value of total assets at end of year	2018-12-31	$109,265,672
Value of total assets at beginning of year	2018-12-31	$103,476,504
Total of administrative expenses incurred including professional, contract, advisory and management fees	2018-12-31	$121,129
Total interest from all sources	2018-12-31	$95,900
Total dividends received (eg from common stock, registered investment company shares)	2018-12-31	$6,079,285
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2018-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2018-12-31	$6,079,285
Administrative expenses professional fees incurred	2018-12-31	$121,129
Was this plan covered by a fidelity bond	2018-12-31	Yes
Value of fidelity bond cover	2018-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2018-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2018-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2018-12-31	No
Contributions received from participants	2018-12-31	$5,588,777
Participant contributions at end of year	2018-12-31	$2,322,351
Participant contributions at beginning of year	2018-12-31	$1,888,102
Income. Received or receivable in cash from other sources (including rollovers)	2018-12-31	$7,537,101
Other income not declared elsewhere	2018-12-31	$72,108
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2018-12-31	No
Value of net income/loss	2018-12-31	$5,692,623
Value of net assets at end of year (total assets less liabilities)	2018-12-31	$109,265,672
Value of net assets at beginning of year (total assets less liabilities)	2018-12-31	$103,476,504
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2018-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2018-12-31	No
Were any leases to which the plan was party in default or uncollectible	2018-12-31	No
Value of interest in registered invesment companies (eg mutual funds) at end of year	2018-12-31	$92,011,391
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2018-12-31	$87,377,970
Interest on participant loans	2018-12-31	$95,900
Value of interest in common/collective trusts at end of year	2018-12-31	$14,931,930
Value of interest in common/collective trusts at beginning of year	2018-12-31	$14,210,432
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2018-12-31	$-11,621,402
Net investment gain or loss from common/collective trusts	2018-12-31	$251,508
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2018-12-31	No
Was there a failure to transmit to the plan any participant contributions	2018-12-31	No
Has the plan failed to provide any benefit when due under the plan	2018-12-31	No
Contributions received in cash from employer	2018-12-31	$5,920,382
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2018-12-31	$8,279,967
Did the plan have assets held for investment	2018-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2018-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2018-12-31	No
Aggregate proceeds on sale of assets	2018-12-31	$19,682,681
Aggregate carrying amount (costs) on sale of assets	2018-12-31	$19,512,518
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2018-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2018-12-31	Disclaimer
Accountancy firm name	2018-12-31	SCHNEIDER DOWNS & CO., INC.
Accountancy firm EIN	2018-12-31	251408703
2017 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2017 401k financial data
Total transfer of assets to this plan	2017-12-31	$392,695
Total transfer of assets from this plan	2017-12-31	$80
Total income from all sources (including contributions)	2017-12-31	$24,894,610
Total loss/gain on sale of assets	2017-12-31	$870,775
Total of all expenses incurred	2017-12-31	$7,253,862
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2017-12-31	$7,117,659
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2017-12-31	$10,605,602
Value of total assets at end of year	2017-12-31	$103,476,504
Value of total assets at beginning of year	2017-12-31	$85,443,141
Total of administrative expenses incurred including professional, contract, advisory and management fees	2017-12-31	$136,203
Total interest from all sources	2017-12-31	$71,887
Total dividends received (eg from common stock, registered investment company shares)	2017-12-31	$3,530,919
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2017-12-31	No
Administrative expenses professional fees incurred	2017-12-31	$136,203
Was this plan covered by a fidelity bond	2017-12-31	Yes
Value of fidelity bond cover	2017-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2017-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2017-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2017-12-31	No
Contributions received from participants	2017-12-31	$4,589,325
Participant contributions at end of year	2017-12-31	$1,888,102
Participant contributions at beginning of year	2017-12-31	$1,701,606
Income. Received or receivable in cash from other sources (including rollovers)	2017-12-31	$911,116
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2017-12-31	$115,811
Other income not declared elsewhere	2017-12-31	$57,183
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2017-12-31	No
Value of net income/loss	2017-12-31	$17,640,748
Value of net assets at end of year (total assets less liabilities)	2017-12-31	$103,476,504
Value of net assets at beginning of year (total assets less liabilities)	2017-12-31	$85,443,141
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2017-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2017-12-31	No
Were any leases to which the plan was party in default or uncollectible	2017-12-31	No
Value of interest in registered invesment companies (eg mutual funds) at end of year	2017-12-31	$87,377,970
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2017-12-31	$68,969,615
Interest on participant loans	2017-12-31	$71,887
Value of interest in common/collective trusts at end of year	2017-12-31	$14,210,432
Value of interest in common/collective trusts at beginning of year	2017-12-31	$14,771,920
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2017-12-31	$9,548,818
Net investment gain or loss from common/collective trusts	2017-12-31	$209,426
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2017-12-31	No
Was there a failure to transmit to the plan any participant contributions	2017-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2017-12-31	No
Contributions received in cash from employer	2017-12-31	$5,105,161
Income. Dividends from common stock	2017-12-31	$3,530,919
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2017-12-31	$7,001,848
Did the plan have assets held for investment	2017-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2017-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2017-12-31	No
Aggregate proceeds on sale of assets	2017-12-31	$16,001,289
Aggregate carrying amount (costs) on sale of assets	2017-12-31	$15,130,514
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2017-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2017-12-31	Disclaimer
Accountancy firm name	2017-12-31	SCHNEIDER DOWNS & CO., INC.
Accountancy firm EIN	2017-12-31	251408703
2016 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2016 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2016-12-31	$-421
Total unrealized appreciation/depreciation of assets	2016-12-31	$-421
Total transfer of assets to this plan	2016-12-31	$55,762
Total transfer of assets from this plan	2016-12-31	$7,796
Total income from all sources (including contributions)	2016-12-31	$14,601,279
Total loss/gain on sale of assets	2016-12-31	$338,397
Total of all expenses incurred	2016-12-31	$6,131,890
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2016-12-31	$6,033,584
Value of total corrective distributions	2016-12-31	$5,078
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2016-12-31	$8,770,865
Value of total assets at end of year	2016-12-31	$85,443,141
Value of total assets at beginning of year	2016-12-31	$76,925,786
Total of administrative expenses incurred including professional, contract, advisory and management fees	2016-12-31	$93,228
Total interest from all sources	2016-12-31	$67,817
Total dividends received (eg from common stock, registered investment company shares)	2016-12-31	$2,450,484
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2016-12-31	No
Administrative expenses professional fees incurred	2016-12-31	$93,228
Was this plan covered by a fidelity bond	2016-12-31	Yes
Value of fidelity bond cover	2016-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2016-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2016-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2016-12-31	No
Contributions received from participants	2016-12-31	$4,324,587
Participant contributions at end of year	2016-12-31	$1,701,606
Participant contributions at beginning of year	2016-12-31	$1,536,377
Income. Received or receivable in cash from other sources (including rollovers)	2016-12-31	$87,992
Other income not declared elsewhere	2016-12-31	$50,226
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2016-12-31	No
Value of net income/loss	2016-12-31	$8,469,389
Value of net assets at end of year (total assets less liabilities)	2016-12-31	$85,443,141
Value of net assets at beginning of year (total assets less liabilities)	2016-12-31	$76,925,786
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2016-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2016-12-31	No
Were any leases to which the plan was party in default or uncollectible	2016-12-31	No
Value of interest in registered invesment companies (eg mutual funds) at end of year	2016-12-31	$68,969,615
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2016-12-31	$61,901,304
Interest on participant loans	2016-12-31	$67,817
Value of interest in common/collective trusts at end of year	2016-12-31	$14,771,920
Value of interest in common/collective trusts at beginning of year	2016-12-31	$13,488,105
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2016-12-31	$2,731,682
Net investment gain or loss from common/collective trusts	2016-12-31	$192,229
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2016-12-31	No
Was there a failure to transmit to the plan any participant contributions	2016-12-31	No
Has the plan failed to provide any benefit when due under the plan	2016-12-31	No
Contributions received in cash from employer	2016-12-31	$4,358,286
Income. Dividends from common stock	2016-12-31	$2,450,484
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2016-12-31	$6,033,584
Did the plan have assets held for investment	2016-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2016-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2016-12-31	No
Aggregate proceeds on sale of assets	2016-12-31	$31,382,961
Aggregate carrying amount (costs) on sale of assets	2016-12-31	$31,044,564
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2016-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2016-12-31	Disclaimer
Accountancy firm name	2016-12-31	SCHNEIDER DOWNS & CO., INC.
Accountancy firm EIN	2016-12-31	251408703
2015 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2015 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2015-12-31	$-262
Total unrealized appreciation/depreciation of assets	2015-12-31	$-262
Total transfer of assets from this plan	2015-12-31	$9,133
Total income from all sources (including contributions)	2015-12-31	$7,116,887
Total loss/gain on sale of assets	2015-12-31	$219,662
Total of all expenses incurred	2015-12-31	$13,636,217
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2015-12-31	$13,539,428
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2015-12-31	$6,680,345
Value of total assets at end of year	2015-12-31	$76,925,786
Value of total assets at beginning of year	2015-12-31	$83,454,249
Total of administrative expenses incurred including professional, contract, advisory and management fees	2015-12-31	$96,789
Total interest from all sources	2015-12-31	$56,359
Total dividends received (eg from common stock, registered investment company shares)	2015-12-31	$2,974,729
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2015-12-31	No
Administrative expenses professional fees incurred	2015-12-31	$96,789
Was this plan covered by a fidelity bond	2015-12-31	Yes
Value of fidelity bond cover	2015-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2015-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2015-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2015-12-31	No
Contributions received from participants	2015-12-31	$4,325,960
Participant contributions at end of year	2015-12-31	$1,536,377
Participant contributions at beginning of year	2015-12-31	$1,575,605
Income. Received or receivable in cash from other sources (including rollovers)	2015-12-31	$865,447
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2015-12-31	$536,390
Other income not declared elsewhere	2015-12-31	$58,870
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2015-12-31	No
Value of net income/loss	2015-12-31	$-6,519,330
Value of net assets at end of year (total assets less liabilities)	2015-12-31	$76,925,786
Value of net assets at beginning of year (total assets less liabilities)	2015-12-31	$83,454,249
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2015-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2015-12-31	No
Were any leases to which the plan was party in default or uncollectible	2015-12-31	No
Value of interest in registered invesment companies (eg mutual funds) at end of year	2015-12-31	$61,901,304
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2015-12-31	$67,645,552
Interest on participant loans	2015-12-31	$56,359
Value of interest in common/collective trusts at end of year	2015-12-31	$13,488,105
Value of interest in common/collective trusts at beginning of year	2015-12-31	$14,233,092
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2015-12-31	$-3,067,123
Net investment gain or loss from common/collective trusts	2015-12-31	$194,307
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2015-12-31	No
Was there a failure to transmit to the plan any participant contributions	2015-12-31	No
Has the plan failed to provide any benefit when due under the plan	2015-12-31	No
Contributions received in cash from employer	2015-12-31	$1,488,938
Income. Dividends from common stock	2015-12-31	$2,974,729
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2015-12-31	$13,003,038
Did the plan have assets held for investment	2015-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2015-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2015-12-31	No
Aggregate proceeds on sale of assets	2015-12-31	$28,647,559
Aggregate carrying amount (costs) on sale of assets	2015-12-31	$28,427,897
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2015-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2015-12-31	Disclaimer
Accountancy firm name	2015-12-31	SCHNEIDER DOWNS & CO, INC.
Accountancy firm EIN	2015-12-31	251408703
2014 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2014 401k financial data
Total unrealized appreciation/depreciation of assets	2014-12-31	$0
Total transfer of assets to this plan	2014-12-31	$355,437
Total transfer of assets from this plan	2014-12-31	$80,082
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2014-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2014-12-31	$0
Total income from all sources (including contributions)	2014-12-31	$14,668,121
Total loss/gain on sale of assets	2014-12-31	$85,136
Total of all expenses incurred	2014-12-31	$4,018,614
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2014-12-31	$3,823,563
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2014-12-31	$10,303,361
Value of total assets at end of year	2014-12-31	$83,454,249
Value of total assets at beginning of year	2014-12-31	$72,529,387
Total of administrative expenses incurred including professional, contract, advisory and management fees	2014-12-31	$195,051
Total interest from all sources	2014-12-31	$47,897
Total dividends received (eg from common stock, registered investment company shares)	2014-12-31	$3,287,592
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2014-12-31	No
Administrative expenses professional fees incurred	2014-12-31	$195,051
Was this plan covered by a fidelity bond	2014-12-31	Yes
Value of fidelity bond cover	2014-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2014-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2014-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2014-12-31	No
Contributions received from participants	2014-12-31	$2,851,757
Participant contributions at end of year	2014-12-31	$1,575,605
Participant contributions at beginning of year	2014-12-31	$1,180,201
Income. Received or receivable in cash from other sources (including rollovers)	2014-12-31	$4,756,991
Other income not declared elsewhere	2014-12-31	$61,966
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2014-12-31	No
Value of net income/loss	2014-12-31	$10,649,507
Value of net assets at end of year (total assets less liabilities)	2014-12-31	$83,454,249
Value of net assets at beginning of year (total assets less liabilities)	2014-12-31	$72,529,387
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2014-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2014-12-31	No
Were any leases to which the plan was party in default or uncollectible	2014-12-31	No
Value of interest in registered invesment companies (eg mutual funds) at end of year	2014-12-31	$67,645,552
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2014-12-31	$57,172,114
Interest on participant loans	2014-12-31	$47,897
Value of interest in common/collective trusts at end of year	2014-12-31	$14,233,092
Value of interest in common/collective trusts at beginning of year	2014-12-31	$14,177,072
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2014-12-31	$687,951
Net investment gain or loss from common/collective trusts	2014-12-31	$194,218
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2014-12-31	No
Was there a failure to transmit to the plan any participant contributions	2014-12-31	No
Has the plan failed to provide any benefit when due under the plan	2014-12-31	No
Contributions received in cash from employer	2014-12-31	$2,694,613
Income. Dividends from common stock	2014-12-31	$3,287,592
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2014-12-31	$3,823,563
Did the plan have assets held for investment	2014-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2014-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2014-12-31	No
Aggregate proceeds on sale of assets	2014-12-31	$14,942,531
Aggregate carrying amount (costs) on sale of assets	2014-12-31	$14,857,395
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2014-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2014-12-31	Disclaimer
Accountancy firm name	2014-12-31	SCHNEIDER DOWNS & CO, INC.
Accountancy firm EIN	2014-12-31	251408703
2013 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2013 401k financial data
Total unrealized appreciation/depreciation of assets	2013-12-31	$0
Total transfer of assets to this plan	2013-12-31	$1,295
Total transfer of assets from this plan	2013-12-31	$13,223
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2013-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2013-12-31	$0
Total income from all sources (including contributions)	2013-12-31	$16,510,319
Total loss/gain on sale of assets	2013-12-31	$725,648
Total of all expenses incurred	2013-12-31	$3,717,793
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2013-12-31	$3,462,539
Value of total corrective distributions	2013-12-31	$124,187
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2013-12-31	$5,102,733
Value of total assets at end of year	2013-12-31	$72,529,387
Value of total assets at beginning of year	2013-12-31	$59,748,789
Total of administrative expenses incurred including professional, contract, advisory and management fees	2013-12-31	$131,067
Total interest from all sources	2013-12-31	$46,443
Total dividends received (eg from common stock, registered investment company shares)	2013-12-31	$2,385,142
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2013-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2013-12-31	$2,385,142
Administrative expenses professional fees incurred	2013-12-31	$131,067
Was this plan covered by a fidelity bond	2013-12-31	Yes
Value of fidelity bond cover	2013-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2013-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2013-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2013-12-31	No
Contributions received from participants	2013-12-31	$2,437,978
Participant contributions at end of year	2013-12-31	$1,180,201
Participant contributions at beginning of year	2013-12-31	$1,125,153
Income. Received or receivable in cash from other sources (including rollovers)	2013-12-31	$163,896
Other income not declared elsewhere	2013-12-31	$41,607
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2013-12-31	No
Value of net income/loss	2013-12-31	$12,792,526
Value of net assets at end of year (total assets less liabilities)	2013-12-31	$72,529,387
Value of net assets at beginning of year (total assets less liabilities)	2013-12-31	$59,748,789
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2013-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2013-12-31	No
Were any leases to which the plan was party in default or uncollectible	2013-12-31	No
Value of interest in registered invesment companies (eg mutual funds) at end of year	2013-12-31	$57,172,114
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2013-12-31	$46,008,937
Interest on participant loans	2013-12-31	$46,443
Value of interest in common/collective trusts at end of year	2013-12-31	$14,177,072
Value of interest in common/collective trusts at beginning of year	2013-12-31	$12,614,699
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2013-12-31	$8,009,584
Net investment gain or loss from common/collective trusts	2013-12-31	$199,162
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2013-12-31	No
Was there a failure to transmit to the plan any participant contributions	2013-12-31	No
Has the plan failed to provide any benefit when due under the plan	2013-12-31	No
Contributions received in cash from employer	2013-12-31	$2,500,859
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2013-12-31	$3,462,539
Did the plan have assets held for investment	2013-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2013-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2013-12-31	No
Aggregate proceeds on sale of assets	2013-12-31	$12,994,652
Aggregate carrying amount (costs) on sale of assets	2013-12-31	$12,269,004
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2013-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2013-12-31	Disclaimer
Accountancy firm name	2013-12-31	SCHNEIDER DOWNS & CO. INC
Accountancy firm EIN	2013-12-31	251408703
2012 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2012 401k financial data
Total unrealized appreciation/depreciation of assets	2012-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2012-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2012-12-31	$0
Total income from all sources (including contributions)	2012-12-31	$11,219,234
Total loss/gain on sale of assets	2012-12-31	$661,789
Total of all expenses incurred	2012-12-31	$6,270,804
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2012-12-31	$6,209,408
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2012-12-31	$4,820,179
Value of total assets at end of year	2012-12-31	$59,748,789
Value of total assets at beginning of year	2012-12-31	$54,800,359
Total of administrative expenses incurred including professional, contract, advisory and management fees	2012-12-31	$61,396
Total interest from all sources	2012-12-31	$46,466
Total dividends received (eg from common stock, registered investment company shares)	2012-12-31	$1,351,031
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2012-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2012-12-31	$1,351,031
Was this plan covered by a fidelity bond	2012-12-31	Yes
Value of fidelity bond cover	2012-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2012-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2012-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2012-12-31	No
Contributions received from participants	2012-12-31	$2,354,258
Participant contributions at end of year	2012-12-31	$1,125,153
Participant contributions at beginning of year	2012-12-31	$1,189,716
Income. Received or receivable in cash from other sources (including rollovers)	2012-12-31	$107,545
Other income not declared elsewhere	2012-12-31	$42,789
Administrative expenses (other) incurred	2012-12-31	$61,396
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2012-12-31	No
Value of net income/loss	2012-12-31	$4,948,430
Value of net assets at end of year (total assets less liabilities)	2012-12-31	$59,748,789
Value of net assets at beginning of year (total assets less liabilities)	2012-12-31	$54,800,359
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2012-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2012-12-31	No
Were any leases to which the plan was party in default or uncollectible	2012-12-31	No
Value of interest in registered invesment companies (eg mutual funds) at end of year	2012-12-31	$46,008,937
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2012-12-31	$40,069,795
Interest on participant loans	2012-12-31	$46,466
Value of interest in common/collective trusts at end of year	2012-12-31	$12,614,699
Value of interest in common/collective trusts at beginning of year	2012-12-31	$13,540,848
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2012-12-31	$4,052,916
Net investment gain or loss from common/collective trusts	2012-12-31	$244,064
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2012-12-31	No
Was there a failure to transmit to the plan any participant contributions	2012-12-31	No
Has the plan failed to provide any benefit when due under the plan	2012-12-31	No
Contributions received in cash from employer	2012-12-31	$2,358,376
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2012-12-31	$6,209,408
Did the plan have assets held for investment	2012-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2012-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2012-12-31	No
Aggregate proceeds on sale of assets	2012-12-31	$15,344,200
Aggregate carrying amount (costs) on sale of assets	2012-12-31	$14,682,411
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2012-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2012-12-31	Disclaimer
Accountancy firm name	2012-12-31	SCHNEIDER DOWNS & CO. INC
Accountancy firm EIN	2012-12-31	251408703
2011 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2011 401k financial data
Total unrealized appreciation/depreciation of assets	2011-12-31	$0
Total transfer of assets to this plan	2011-12-31	$1,598,892
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2011-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2011-12-31	$0
Total income from all sources (including contributions)	2011-12-31	$4,003,241
Total loss/gain on sale of assets	2011-12-31	$1,524,065
Total of all expenses incurred	2011-12-31	$4,069,952
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2011-12-31	$4,053,558
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2011-12-31	$4,615,328
Value of total assets at end of year	2011-12-31	$54,800,359
Value of total assets at beginning of year	2011-12-31	$53,268,178
Total of administrative expenses incurred including professional, contract, advisory and management fees	2011-12-31	$16,394
Total interest from all sources	2011-12-31	$45,569
Total dividends received (eg from common stock, registered investment company shares)	2011-12-31	$766,724
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2011-12-31	No
Was this plan covered by a fidelity bond	2011-12-31	Yes
Value of fidelity bond cover	2011-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2011-12-31	Yes
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2011-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2011-12-31	No
Contributions received from participants	2011-12-31	$2,140,848
Participant contributions at end of year	2011-12-31	$1,189,716
Participant contributions at beginning of year	2011-12-31	$1,007,207
Income. Received or receivable in cash from other sources (including rollovers)	2011-12-31	$302,046
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2011-12-31	$55,000
Other income not declared elsewhere	2011-12-31	$83
Administrative expenses (other) incurred	2011-12-31	$16,394
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2011-12-31	No
Value of net income/loss	2011-12-31	$-66,711
Value of net assets at end of year (total assets less liabilities)	2011-12-31	$54,800,359
Value of net assets at beginning of year (total assets less liabilities)	2011-12-31	$53,268,178
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2011-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2011-12-31	No
Were any leases to which the plan was party in default or uncollectible	2011-12-31	No
Value of interest in registered invesment companies (eg mutual funds) at end of year	2011-12-31	$40,069,795
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2011-12-31	$38,622,800
Interest on participant loans	2011-12-31	$45,569
Value of interest in common/collective trusts at end of year	2011-12-31	$13,540,848
Value of interest in common/collective trusts at beginning of year	2011-12-31	$13,638,171
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2011-12-31	$-3,244,685
Net investment gain or loss from common/collective trusts	2011-12-31	$296,157
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2011-12-31	No
Was there a failure to transmit to the plan any participant contributions	2011-12-31	No
Has the plan failed to provide any benefit when due under the plan	2011-12-31	No
Contributions received in cash from employer	2011-12-31	$2,172,434
Income. Dividends from common stock	2011-12-31	$766,724
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2011-12-31	$3,998,558
Was the provided the required notice or one of the exceptions to providing the black out period notice applied under 29 CFR 2520.101-3	2011-12-31	Yes
Did the plan have assets held for investment	2011-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2011-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2011-12-31	No
Aggregate proceeds on sale of assets	2011-12-31	$46,158,722
Aggregate carrying amount (costs) on sale of assets	2011-12-31	$44,634,657
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2011-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2011-12-31	Disclaimer
Accountancy firm name	2011-12-31	SCHNEIDER DOWNS & CO. INC
Accountancy firm EIN	2011-12-31	251408703
2010 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2010 401k financial data
Total unrealized appreciation/depreciation of assets	2010-12-31	$0
Total transfer of assets to this plan	2010-12-31	$3,201
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2010-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2010-12-31	$0
Total income from all sources (including contributions)	2010-12-31	$7,534,407
Total loss/gain on sale of assets	2010-12-31	$291,532
Total of all expenses incurred	2010-12-31	$2,370,016
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2010-12-31	$2,344,841
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2010-12-31	$2,497,609
Value of total assets at end of year	2010-12-31	$53,268,178
Value of total assets at beginning of year	2010-12-31	$48,100,586
Total of administrative expenses incurred including professional, contract, advisory and management fees	2010-12-31	$25,175
Total interest from all sources	2010-12-31	$51,876
Total dividends received (eg from common stock, registered investment company shares)	2010-12-31	$660,941
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2010-12-31	No
Was this plan covered by a fidelity bond	2010-12-31	Yes
Value of fidelity bond cover	2010-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2010-12-31	Yes
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2010-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2010-12-31	No
Contributions received from participants	2010-12-31	$1,803,261
Participant contributions at end of year	2010-12-31	$1,007,207
Participant contributions at beginning of year	2010-12-31	$1,006,036
Participant contributions at beginning of year	2010-12-31	$140,765
Income. Received or receivable in cash from other sources (including rollovers)	2010-12-31	$67,611
Administrative expenses (other) incurred	2010-12-31	$25,175
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2010-12-31	No
Value of net income/loss	2010-12-31	$5,164,391
Value of net assets at end of year (total assets less liabilities)	2010-12-31	$53,268,178
Value of net assets at beginning of year (total assets less liabilities)	2010-12-31	$48,100,586
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2010-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2010-12-31	No
Were any leases to which the plan was party in default or uncollectible	2010-12-31	No
Value of interest in registered invesment companies (eg mutual funds) at end of year	2010-12-31	$38,622,800
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2010-12-31	$33,240,649
Interest on participant loans	2010-12-31	$51,876
Value of interest in common/collective trusts at end of year	2010-12-31	$13,638,171
Value of interest in common/collective trusts at beginning of year	2010-12-31	$13,625,201
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2010-12-31	$3,748,373
Net investment gain or loss from common/collective trusts	2010-12-31	$284,076
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2010-12-31	No
Was there a failure to transmit to the plan any participant contributions	2010-12-31	No
Has the plan failed to provide any benefit when due under the plan	2010-12-31	No
Contributions received in cash from employer	2010-12-31	$626,737
Employer contributions (assets) at beginning of year	2010-12-31	$87,935
Income. Dividends from common stock	2010-12-31	$660,941
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2010-12-31	$2,344,841
Was the provided the required notice or one of the exceptions to providing the black out period notice applied under 29 CFR 2520.101-3	2010-12-31	Yes
Did the plan have assets held for investment	2010-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2010-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2010-12-31	No
Aggregate proceeds on sale of assets	2010-12-31	$10,986,006
Aggregate carrying amount (costs) on sale of assets	2010-12-31	$10,694,474
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2010-12-31	Yes
Opinion of an independent qualified public accountant for this plan	2010-12-31	Disclaimer
Accountancy firm name	2010-12-31	SCHNEIDER DOWNS & CO., INC.
Accountancy firm EIN	2010-12-31	251408703
2009 : EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2009 401k financial data
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2009-12-31	$0

Form 5500 Responses for EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES

2022: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2022 form 5500 responses
2022-01-01	Type of plan entity	Single employer plan
2022-01-01	Submission has been amended	No
2022-01-01	This submission is the final filing	No
2022-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2022-01-01	Plan is a collectively bargained plan	No
2022-01-01	Plan funding arrangement – Trust	Yes
2022-01-01	Plan benefit arrangement - Trust	Yes
2021: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2021 form 5500 responses
2021-01-01	Type of plan entity	Single employer plan
2021-01-01	This submission is the final filing	No
2021-01-01	Plan is a collectively bargained plan	No
2021-01-01	Plan funding arrangement – Trust	Yes
2021-01-01	Plan benefit arrangement - Trust	Yes
2020: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2020 form 5500 responses
2020-01-01	Type of plan entity	Single employer plan
2020-01-01	Submission has been amended	No
2020-01-01	This submission is the final filing	No
2020-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2020-01-01	Plan is a collectively bargained plan	No
2020-01-01	Plan funding arrangement – Trust	Yes
2020-01-01	Plan benefit arrangement - Trust	Yes
2019: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2019 form 5500 responses
2019-01-01	Type of plan entity	Single employer plan
2019-01-01	Submission has been amended	No
2019-01-01	This submission is the final filing	No
2019-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2019-01-01	Plan is a collectively bargained plan	No
2019-01-01	Plan funding arrangement – Trust	Yes
2019-01-01	Plan benefit arrangement - Trust	Yes
2018: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2018 form 5500 responses
2018-01-01	Type of plan entity	Single employer plan
2018-01-01	Plan funding arrangement – Trust	Yes
2018-01-01	Plan benefit arrangement - Trust	Yes
2017: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2017 form 5500 responses
2017-01-01	Type of plan entity	Single employer plan
2017-01-01	Plan funding arrangement – Trust	Yes
2017-01-01	Plan benefit arrangement - Trust	Yes
2016: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2016 form 5500 responses
2016-01-01	Type of plan entity	Single employer plan
2016-01-01	Plan funding arrangement – Trust	Yes
2016-01-01	Plan benefit arrangement - Trust	Yes
2015: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2015 form 5500 responses
2015-01-01	Type of plan entity	Single employer plan
2015-01-01	Plan funding arrangement – Trust	Yes
2015-01-01	Plan benefit arrangement - Trust	Yes
2014: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2014 form 5500 responses
2014-01-01	Type of plan entity	Single employer plan
2014-01-01	Submission has been amended	No
2014-01-01	This submission is the final filing	No
2014-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2014-01-01	Plan is a collectively bargained plan	No
2014-01-01	Plan funding arrangement – Trust	Yes
2014-01-01	Plan benefit arrangement - Trust	Yes
2013: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2013 form 5500 responses
2013-01-01	Type of plan entity	Single employer plan
2013-01-01	Submission has been amended	No
2013-01-01	This submission is the final filing	No
2013-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2013-01-01	Plan is a collectively bargained plan	No
2013-01-01	Plan funding arrangement – Trust	Yes
2013-01-01	Plan benefit arrangement - Trust	Yes
2012: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2012 form 5500 responses
2012-01-01	Type of plan entity	Single employer plan
2012-01-01	Submission has been amended	No
2012-01-01	This submission is the final filing	No
2012-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2012-01-01	Plan is a collectively bargained plan	No
2012-01-01	Plan funding arrangement – Trust	Yes
2012-01-01	Plan benefit arrangement - Trust	Yes
2011: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2011 form 5500 responses
2011-01-01	Type of plan entity	Single employer plan
2011-01-01	Submission has been amended	No
2011-01-01	This submission is the final filing	No
2011-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2011-01-01	Plan is a collectively bargained plan	No
2011-01-01	Plan funding arrangement – Trust	Yes
2011-01-01	Plan benefit arrangement - Trust	Yes
2010: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2010 form 5500 responses
2010-01-01	Type of plan entity	Single employer plan
2010-01-01	Submission has been amended	No
2010-01-01	This submission is the final filing	No
2010-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2010-01-01	Plan is a collectively bargained plan	No
2010-01-01	Plan funding arrangement – Trust	Yes
2010-01-01	Plan benefit arrangement - Trust	Yes
2009: EMPLOYEE SAVINGS PLAN OF KOPPERS INC. AND SUBSIDIARIES 2009 form 5500 responses
2009-01-01	Type of plan entity	Single employer plan
2009-01-01	Submission has been amended	No
2009-01-01	This submission is the final filing	No
2009-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2009-01-01	Plan is a collectively bargained plan	No
2009-01-01	Plan funding arrangement – Trust	Yes
2009-01-01	Plan benefit arrangement - Trust	Yes

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Company Name:	KOPPERS INC.
Employer identification number (EIN):	251588399
NAIC Classification:	324190

Jurisdiction of Incorporation:	Texas Secretary of State
Incorporation Date:	1988-12-21
Company Identification Number:	0007847206
Legal Registered Office Address:	436 7TH AVE STE 1750 PITTSBURGH United States of America (USA) 15219