401k Plan data: C4 THERAPEUTICS INC 401(K) PLAN plan

C4 THERAPEUTICS INC 401(K) PLAN 401k Plan overview

Plan Name	C4 THERAPEUTICS INC 401(K) PLAN
Plan identification number	001

C4 THERAPEUTICS INC 401(K) PLAN Benefits

401k Plan Type

Defined Contribution Pension

Plan Features/Benefits

Profit-sharing
ERISA section 404(c) Plan - This plan, or any part of it is intended to meet the conditions of 29 CFR 2550.404c-1.
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.
Master plan - A pension plan that is made available by a sponsor for adoption by employers; that is the subject of a favorable opinion letter; and for which a single funding medium (for example, a trust or custodial account) is established for the joint use of all adopting employers.

401k Sponsoring company profile

C4 THERAPEUTICS INC has sponsored the creation of one or more 401k plans.

Company Name: C4 THERAPEUTICS INC

Employer identification number (EIN): 475617627

NAIC Classification: 541700

Form 5500 Filing Information

Submission information for form 5500 for 401k plan C4 THERAPEUTICS INC 401(K) PLAN

Plan id# Filing Submission Date Name of Administrator Date Administrator Signed Name of Company Sponsor Date Sponsor Signed
001 2024-01-01 MELISSA EPSTEIN
001 2023-01-01
001 2023-01-01 MELISSA EPSTEIN
001 2022-01-01
001 2022-01-01 MELISSA EPSTEIN
001 2021-01-01
001 2021-01-01 MELISSA EPSTEIN
001 2020-01-01
001 2019-01-01
001 2018-01-01
001 2017-01-01 LAURA WAHLBERG LAURA WAHLBERG 2018-10-09
001 2016-01-01 LAURA WAHLBERG 2017-07-07

Plan Statistics for C4 THERAPEUTICS INC 401(K) PLAN

401k plan membership statisitcs for C4 THERAPEUTICS INC 401(K) PLAN

Measure Date Value
2023: C4 THERAPEUTICS INC 401(K) PLAN 2023 401k membership
Total participants, beginning-of-year 2023-01-01 188
Total number of active participants reported on line 7a of the Form 5500 2023-01-01 149
Number of retired or separated participants receiving benefits 2023-01-01 0
Number of other retired or separated participants entitled to future benefits 2023-01-01 50
Total of all active and inactive participants 2023-01-01 199
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2023-01-01 0
Total participants 2023-01-01 199
Number of participants with account balances 2023-01-01 198
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2023-01-01 4
2022: C4 THERAPEUTICS INC 401(K) PLAN 2022 401k membership
Total participants, beginning-of-year 2022-01-01 157
Total number of active participants reported on line 7a of the Form 5500 2022-01-01 147
Number of retired or separated participants receiving benefits 2022-01-01 0
Number of other retired or separated participants entitled to future benefits 2022-01-01 41
Total of all active and inactive participants 2022-01-01 188
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2022-01-01 0
Total participants 2022-01-01 188
Number of participants with account balances 2022-01-01 184
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2022-01-01 14
2021: C4 THERAPEUTICS INC 401(K) PLAN 2021 401k membership
Total participants, beginning-of-year 2021-01-01 119
Total number of active participants reported on line 7a of the Form 5500 2021-01-01 121
Number of retired or separated participants receiving benefits 2021-01-01 0
Number of other retired or separated participants entitled to future benefits 2021-01-01 36
Total of all active and inactive participants 2021-01-01 157
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2021-01-01 0
Total participants 2021-01-01 157
Number of participants with account balances 2021-01-01 150
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2021-01-01 13
2020: C4 THERAPEUTICS INC 401(K) PLAN 2020 401k membership
Total participants, beginning-of-year 2020-01-01 96
Total number of active participants reported on line 7a of the Form 5500 2020-01-01 101
Number of retired or separated participants receiving benefits 2020-01-01 0
Number of other retired or separated participants entitled to future benefits 2020-01-01 18
Total of all active and inactive participants 2020-01-01 119
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2020-01-01 0
Total participants 2020-01-01 119
Number of participants with account balances 2020-01-01 114
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2020-01-01 3
2019: C4 THERAPEUTICS INC 401(K) PLAN 2019 401k membership
Total participants, beginning-of-year 2019-01-01 76
Total number of active participants reported on line 7a of the Form 5500 2019-01-01 81
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 15
Total of all active and inactive participants 2019-01-01 96
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2019-01-01 0
Total participants 2019-01-01 96
Number of participants with account balances 2019-01-01 94
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2019-01-01 7
2018: C4 THERAPEUTICS INC 401(K) PLAN 2018 401k membership
Total participants, beginning-of-year 2018-01-01 60
Total number of active participants reported on line 7a of the Form 5500 2018-01-01 67
Number of retired or separated participants receiving benefits 2018-01-01 0
Number of other retired or separated participants entitled to future benefits 2018-01-01 9
Total of all active and inactive participants 2018-01-01 76
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2018-01-01 0
Total participants 2018-01-01 76
Number of participants with account balances 2018-01-01 73
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2018-01-01 8
2017: C4 THERAPEUTICS INC 401(K) PLAN 2017 401k membership
Total participants, beginning-of-year 2017-01-01 46
Total number of active participants reported on line 7a of the Form 5500 2017-01-01 58
Number of retired or separated participants receiving benefits 2017-01-01 0
Number of other retired or separated participants entitled to future benefits 2017-01-01 2
Total of all active and inactive participants 2017-01-01 60
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2017-01-01 0
Total participants 2017-01-01 60
Number of participants with account balances 2017-01-01 56
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2017-01-01 0

Measure	Date	Value
2023: C4 THERAPEUTICS INC 401(K) PLAN 2023 401k membership
Total participants, beginning-of-year	2023-01-01	188
Total number of active participants reported on line 7a of the Form 5500	2023-01-01	149
Number of retired or separated participants receiving benefits	2023-01-01	0
Number of other retired or separated participants entitled to future benefits	2023-01-01	50
Total of all active and inactive participants	2023-01-01	199
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2023-01-01	0
Total participants	2023-01-01	199
Number of participants with account balances	2023-01-01	198
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2023-01-01	4
2022: C4 THERAPEUTICS INC 401(K) PLAN 2022 401k membership
Total participants, beginning-of-year	2022-01-01	157
Total number of active participants reported on line 7a of the Form 5500	2022-01-01	147
Number of retired or separated participants receiving benefits	2022-01-01	0
Number of other retired or separated participants entitled to future benefits	2022-01-01	41
Total of all active and inactive participants	2022-01-01	188
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2022-01-01	0
Total participants	2022-01-01	188
Number of participants with account balances	2022-01-01	184
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2022-01-01	14
2021: C4 THERAPEUTICS INC 401(K) PLAN 2021 401k membership
Total participants, beginning-of-year	2021-01-01	119
Total number of active participants reported on line 7a of the Form 5500	2021-01-01	121
Number of retired or separated participants receiving benefits	2021-01-01	0
Number of other retired or separated participants entitled to future benefits	2021-01-01	36
Total of all active and inactive participants	2021-01-01	157
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2021-01-01	0
Total participants	2021-01-01	157
Number of participants with account balances	2021-01-01	150
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2021-01-01	13
2020: C4 THERAPEUTICS INC 401(K) PLAN 2020 401k membership
Total participants, beginning-of-year	2020-01-01	96
Total number of active participants reported on line 7a of the Form 5500	2020-01-01	101
Number of retired or separated participants receiving benefits	2020-01-01	0
Number of other retired or separated participants entitled to future benefits	2020-01-01	18
Total of all active and inactive participants	2020-01-01	119
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2020-01-01	0
Total participants	2020-01-01	119
Number of participants with account balances	2020-01-01	114
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2020-01-01	3
2019: C4 THERAPEUTICS INC 401(K) PLAN 2019 401k membership
Total participants, beginning-of-year	2019-01-01	76
Total number of active participants reported on line 7a of the Form 5500	2019-01-01	81
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	15
Total of all active and inactive participants	2019-01-01	96
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2019-01-01	0
Total participants	2019-01-01	96
Number of participants with account balances	2019-01-01	94
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2019-01-01	7
2018: C4 THERAPEUTICS INC 401(K) PLAN 2018 401k membership
Total participants, beginning-of-year	2018-01-01	60
Total number of active participants reported on line 7a of the Form 5500	2018-01-01	67
Number of retired or separated participants receiving benefits	2018-01-01	0
Number of other retired or separated participants entitled to future benefits	2018-01-01	9
Total of all active and inactive participants	2018-01-01	76
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2018-01-01	0
Total participants	2018-01-01	76
Number of participants with account balances	2018-01-01	73
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2018-01-01	8
2017: C4 THERAPEUTICS INC 401(K) PLAN 2017 401k membership
Total participants, beginning-of-year	2017-01-01	46
Total number of active participants reported on line 7a of the Form 5500	2017-01-01	58
Number of retired or separated participants receiving benefits	2017-01-01	0
Number of other retired or separated participants entitled to future benefits	2017-01-01	2
Total of all active and inactive participants	2017-01-01	60
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2017-01-01	0
Total participants	2017-01-01	60
Number of participants with account balances	2017-01-01	56
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2017-01-01	0

Financial Data on C4 THERAPEUTICS INC 401(K) PLAN

Measure	Date	Value
2023 : C4 THERAPEUTICS INC 401(K) PLAN 2023 401k financial data
Unrealized appreciation/depreciation of real estate assets	2023-12-31	$0
Unrealized appreciation/depreciation of other (non real estate) assets	2023-12-31	$0
Total unrealized appreciation/depreciation of assets	2023-12-31	$0
Total transfer of assets to this plan	2023-12-31	$0
Total transfer of assets from this plan	2023-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2023-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2023-12-31	$0
Expenses. Interest paid	2023-12-31	$0
Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102	2023-12-31	$0
Total income from all sources (including contributions)	2023-12-31	$8,536,996
Total loss/gain on sale of assets	2023-12-31	$0
Total of all expenses incurred	2023-12-31	$781,156
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2023-12-31	$773,089
Expenses. Certain deemed distributions of participant loans	2023-12-31	$0
Value of total corrective distributions	2023-12-31	$3,092
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2023-12-31	$5,340,424
Value of total assets at end of year	2023-12-31	$21,636,909
Value of total assets at beginning of year	2023-12-31	$13,881,069
Total of administrative expenses incurred including professional, contract, advisory and management fees	2023-12-31	$4,975
Total income from rents	2023-12-31	$0
Total interest from all sources	2023-12-31	$31,682
Total dividends received (eg from common stock, registered investment company shares)	2023-12-31	$458,963
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2023-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2023-12-31	$458,963
Assets. Real estate other than employer real property at end of year	2023-12-31	$0
Assets. Real estate other than employer real property at beginning of year	2023-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at end of year	2023-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at beginning of year	2023-12-31	$0
Was this plan covered by a fidelity bond	2023-12-31	Yes
Value of fidelity bond cover	2023-12-31	$500,000
If this is an individual account plan, was there a blackout period	2023-12-31	No
Were there any nonexempt tranactions with any party-in-interest	2023-12-31	No
Contributions received from participants	2023-12-31	$2,669,519
Participant contributions at end of year	2023-12-31	$150,094
Participant contributions at beginning of year	2023-12-31	$50,746
Participant contributions at end of year	2023-12-31	$0
Participant contributions at beginning of year	2023-12-31	$0
Assets. Other investments not covered elsewhere at end of year	2023-12-31	$0
Assets. Other investments not covered elsewhere at beginning of year	2023-12-31	$0
Income. Received or receivable in cash from other sources (including rollovers)	2023-12-31	$1,521,600
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2023-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at end of year	2023-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2023-12-31	$0
Assets. Loans (other than to participants) at end of year	2023-12-31	$0
Assets. Loans (other than to participants) at beginning of year	2023-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2023-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2023-12-31	$0
Other income not declared elsewhere	2023-12-31	$0
Administrative expenses (other) incurred	2023-12-31	$0
Liabilities. Value of operating payables at end of year	2023-12-31	$0
Liabilities. Value of operating payables at beginning of year	2023-12-31	$0
Total non interest bearing cash at end of year	2023-12-31	$0
Total non interest bearing cash at beginning of year	2023-12-31	$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	2023-12-31	No
Income. Non cash contributions	2023-12-31	$0
Value of net income/loss	2023-12-31	$7,755,840
Value of net assets at end of year (total assets less liabilities)	2023-12-31	$21,636,909
Value of net assets at beginning of year (total assets less liabilities)	2023-12-31	$13,881,069
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2023-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2023-12-31	No
Were any leases to which the plan was party in default or uncollectible	2023-12-31	No
Assets. partnership/joint venture interests at end of year	2023-12-31	$0
Assets. partnership/joint venture interests at beginning of year	2023-12-31	$0
Investment advisory and management fees	2023-12-31	$0
Value of interest in registered invesment companies (eg mutual funds) at end of year	2023-12-31	$20,713,724
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2023-12-31	$13,659,400
Value of interest in pooled separate accounts at end of year	2023-12-31	$0
Value of interest in pooled separate accounts at beginning of year	2023-12-31	$0
Interest on participant loans	2023-12-31	$6,382
Income. Interest from loans (other than to participants)	2023-12-31	$0
Interest earned on other investments	2023-12-31	$0
Income. Interest from US Government securities	2023-12-31	$0
Income. Interest from corporate debt instruments	2023-12-31	$0
Value of interest in master investment trust accounts at end of year	2023-12-31	$0
Value of interest in master investment trust accounts at beginning of year	2023-12-31	$0
Value of interest in common/collective trusts at end of year	2023-12-31	$0
Value of interest in common/collective trusts at beginning of year	2023-12-31	$0
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2023-12-31	$618,645
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2023-12-31	$170,923
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2023-12-31	$170,923
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2023-12-31	$25,300
Assets. Value of investments in 103.12 investment entities at end of year	2023-12-31	$0
Assets. Value of investments in 103.12 investment entities at beginning of year	2023-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at end of year	2023-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year	2023-12-31	$0
Expenses. Payments to insurance carriers foe the provision of benefits	2023-12-31	$0
Asset value of US Government securities at end of year	2023-12-31	$0
Asset value of US Government securities at beginning of year	2023-12-31	$0
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2023-12-31	$2,705,927
Net investment gain/loss from pooled separate accounts	2023-12-31	$0
Net investment gain or loss from common/collective trusts	2023-12-31	$0
Net gain/loss from 103.12 investment entities	2023-12-31	$0
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2023-12-31	No
Was there a failure to transmit to the plan any participant contributions	2023-12-31	No
Has the plan failed to provide any benefit when due under the plan	2023-12-31	No
Assets. Invements in employer securities at end of year	2023-12-31	$0
Assets. Invements in employer securities at beginning of year	2023-12-31	$0
Assets. Value of employer real property at end of year	2023-12-31	$0
Assets. Value of employer real property at beginning of year	2023-12-31	$0
Contributions received in cash from employer	2023-12-31	$1,149,305
Employer contributions (assets) at end of year	2023-12-31	$154,446
Employer contributions (assets) at beginning of year	2023-12-31	$0
Income. Dividends from preferred stock	2023-12-31	$0
Income. Dividends from common stock	2023-12-31	$0
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2023-12-31	$773,089
Asset. Corporate debt instrument preferred debt at end of year	2023-12-31	$0
Asset. Corporate debt instrument preferred debt at beginning of year	2023-12-31	$0
Asset. Corporate debt instrument debt (other) at end of year	2023-12-31	$0
Asset. Corporate debt instrument debt (other) at beginning of year	2023-12-31	$0
Contract administrator fees	2023-12-31	$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	2023-12-31	No
Assets. Corporate common stocks other than exployer securities at end of year	2023-12-31	$0
Assets. Corporate common stocks other than exployer securities at beginning of year	2023-12-31	$0
Liabilities. Value of benefit claims payable at end of year	2023-12-31	$0
Liabilities. Value of benefit claims payable at beginning of year	2023-12-31	$0
Assets. Value of buildings and other operty used in plan operation at end of year	2023-12-31	$0
Assets. Value of buildings and other operty used in plan operation at beginning of year	2023-12-31	$0
Did the plan have assets held for investment	2023-12-31	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	2023-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2023-12-31	No
Aggregate proceeds on sale of assets	2023-12-31	$0
Aggregate carrying amount (costs) on sale of assets	2023-12-31	$0
Liabilities. Value of acquisition indebtedness at end of year	2023-12-31	$0
Liabilities. Value of acquisition indebtedness at beginning of year	2023-12-31	$0
Opinion of an independent qualified public accountant for this plan	2023-12-31	Unqualified
Accountancy firm name	2023-12-31	AAFCPAS, INC
Accountancy firm EIN	2023-12-31	042571780
Unrealized appreciation/depreciation of real estate assets	2023-01-01	$0
Unrealized appreciation/depreciation of other (non real estate) assets	2023-01-01	$0
Total unrealized appreciation/depreciation of assets	2023-01-01	$0
Total transfer of assets to this plan	2023-01-01	$0
Total transfer of assets from this plan	2023-01-01	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2023-01-01	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2023-01-01	$0
Total income from all sources (including contributions)	2023-01-01	$8,536,996
Total loss/gain on sale of assets	2023-01-01	$0
Total of all expenses incurred	2023-01-01	$781,156
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2023-01-01	$773,089
Expenses. Certain deemed distributions of participant loans	2023-01-01	$0
Value of total corrective distributions	2023-01-01	$3,092
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2023-01-01	$5,340,424
Value of total assets at end of year	2023-01-01	$21,636,909
Value of total assets at beginning of year	2023-01-01	$13,881,069
Total of administrative expenses incurred including professional, contract, advisory and management fees	2023-01-01	$4,975
Total income from rents	2023-01-01	$0
Total interest from all sources	2023-01-01	$31,682
Total dividends received (eg from common stock, registered investment company shares)	2023-01-01	$458,963
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2023-01-01	No
Total dividends received from registered investment company shares (eg mutual funds)	2023-01-01	$458,963
Assets. Real estate other than employer real property at end of year	2023-01-01	$0
Assets. Real estate other than employer real property at beginning of year	2023-01-01	$0
Assets. Corporate prefeered stocks other than exployer securities at end of year	2023-01-01	$0
Assets. Corporate prefeered stocks other than exployer securities at beginning of year	2023-01-01	$0
Was this plan covered by a fidelity bond	2023-01-01	Yes
Value of fidelity bond cover	2023-01-01	$500,000
If this is an individual account plan, was there a blackout period	2023-01-01	No
Were there any nonexempt tranactions with any party-in-interest	2023-01-01	No
Contributions received from participants	2023-01-01	$2,669,519
Participant contributions at end of year	2023-01-01	$150,094
Participant contributions at beginning of year	2023-01-01	$50,746
Participant contributions at end of year	2023-01-01	$0
Participant contributions at beginning of year	2023-01-01	$0
Assets. Other investments not covered elsewhere at end of year	2023-01-01	$0
Assets. Other investments not covered elsewhere at beginning of year	2023-01-01	$0
Income. Received or receivable in cash from other sources (including rollovers)	2023-01-01	$1,521,600
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2023-01-01	$0
Value of other receiveables (less allowance for doubtful accounts) at end of year	2023-01-01	$0
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2023-01-01	$0
Assets. Loans (other than to participants) at end of year	2023-01-01	$0
Assets. Loans (other than to participants) at beginning of year	2023-01-01	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2023-01-01	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2023-01-01	$0
Other income not declared elsewhere	2023-01-01	$0
Administrative expenses (other) incurred	2023-01-01	$0
Liabilities. Value of operating payables at end of year	2023-01-01	$0
Liabilities. Value of operating payables at beginning of year	2023-01-01	$0
Total non interest bearing cash at end of year	2023-01-01	$0
Total non interest bearing cash at beginning of year	2023-01-01	$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	2023-01-01	No
Income. Non cash contributions	2023-01-01	$0
Value of net income/loss	2023-01-01	$7,755,840
Value of net assets at end of year (total assets less liabilities)	2023-01-01	$21,636,909
Value of net assets at beginning of year (total assets less liabilities)	2023-01-01	$13,881,069
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2023-01-01	No
Were any loans by the plan or fixed income obligations due to the plan in default	2023-01-01	No
Were any leases to which the plan was party in default or uncollectible	2023-01-01	No
Assets. partnership/joint venture interests at end of year	2023-01-01	$0
Assets. partnership/joint venture interests at beginning of year	2023-01-01	$0
Investment advisory and management fees	2023-01-01	$0
Value of interest in registered invesment companies (eg mutual funds) at end of year	2023-01-01	$20,713,724
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2023-01-01	$13,659,400
Value of interest in pooled separate accounts at end of year	2023-01-01	$0
Value of interest in pooled separate accounts at beginning of year	2023-01-01	$0
Interest on participant loans	2023-01-01	$6,382
Income. Interest from loans (other than to participants)	2023-01-01	$0
Interest earned on other investments	2023-01-01	$0
Income. Interest from US Government securities	2023-01-01	$0
Income. Interest from corporate debt instruments	2023-01-01	$0
Value of interest in master investment trust accounts at end of year	2023-01-01	$0
Value of interest in master investment trust accounts at beginning of year	2023-01-01	$0
Value of interest in common/collective trusts at end of year	2023-01-01	$0
Value of interest in common/collective trusts at beginning of year	2023-01-01	$0
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2023-01-01	$618,645
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2023-01-01	$25,300
Assets. Value of investments in 103.12 investment entities at end of year	2023-01-01	$0
Assets. Value of investments in 103.12 investment entities at beginning of year	2023-01-01	$0
Value of funds held in insurance company general accounts (unallocated contracts) at end of year	2023-01-01	$0
Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year	2023-01-01	$0
Expenses. Payments to insurance carriers foe the provision of benefits	2023-01-01	$0
Asset value of US Government securities at end of year	2023-01-01	$0
Asset value of US Government securities at beginning of year	2023-01-01	$0
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2023-01-01	$2,705,927
Net investment gain/loss from pooled separate accounts	2023-01-01	$0
Net investment gain or loss from common/collective trusts	2023-01-01	$0
Net gain/loss from 103.12 investment entities	2023-01-01	$0
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2023-01-01	No
Was there a failure to transmit to the plan any participant contributions	2023-01-01	No
Has the plan failed to provide any benefit when due under the plan	2023-01-01	No
Assets. Invements in employer securities at end of year	2023-01-01	$0
Assets. Invements in employer securities at beginning of year	2023-01-01	$0
Assets. Value of employer real property at end of year	2023-01-01	$0
Assets. Value of employer real property at beginning of year	2023-01-01	$0
Contributions received in cash from employer	2023-01-01	$1,149,305
Employer contributions (assets) at end of year	2023-01-01	$154,446
Employer contributions (assets) at beginning of year	2023-01-01	$0
Income. Dividends from preferred stock	2023-01-01	$0
Income. Dividends from common stock	2023-01-01	$0
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2023-01-01	$773,089
Asset. Corporate debt instrument preferred debt at end of year	2023-01-01	$0
Asset. Corporate debt instrument preferred debt at beginning of year	2023-01-01	$0
Asset. Corporate debt instrument debt (other) at end of year	2023-01-01	$0
Asset. Corporate debt instrument debt (other) at beginning of year	2023-01-01	$0
Contract administrator fees	2023-01-01	$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	2023-01-01	No
Assets. Corporate common stocks other than exployer securities at end of year	2023-01-01	$0
Assets. Corporate common stocks other than exployer securities at beginning of year	2023-01-01	$0
Liabilities. Value of benefit claims payable at end of year	2023-01-01	$0
Liabilities. Value of benefit claims payable at beginning of year	2023-01-01	$0
Assets. Value of buildings and other operty used in plan operation at end of year	2023-01-01	$0
Assets. Value of buildings and other operty used in plan operation at beginning of year	2023-01-01	$0
Did the plan have assets held for investment	2023-01-01	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	2023-01-01	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2023-01-01	No
Aggregate proceeds on sale of assets	2023-01-01	$0
Aggregate carrying amount (costs) on sale of assets	2023-01-01	$0
Liabilities. Value of acquisition indebtedness at end of year	2023-01-01	$0
Liabilities. Value of acquisition indebtedness at beginning of year	2023-01-01	$0
Opinion of an independent qualified public accountant for this plan	2023-01-01	1
Accountancy firm name	2023-01-01	AAFCPAS, INC
Accountancy firm EIN	2023-01-01	042571780
2022 : C4 THERAPEUTICS INC 401(K) PLAN 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	$0
Total transfer of assets from this plan	2022-12-31	$0
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	$2,274,521
Total loss/gain on sale of assets	2022-12-31	$0
Total of all expenses incurred	2022-12-31	$1,433,685
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2022-12-31	$1,416,266
Expenses. Certain deemed distributions of participant loans	2022-12-31	$0
Value of total corrective distributions	2022-12-31	$16,500
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2022-12-31	$4,867,336
Value of total assets at end of year	2022-12-31	$13,881,069
Value of total assets at beginning of year	2022-12-31	$13,040,233
Total of administrative expenses incurred including professional, contract, advisory and management fees	2022-12-31	$919
Total income from rents	2022-12-31	$0
Total interest from all sources	2022-12-31	$3,968
Total dividends received (eg from common stock, registered investment company shares)	2022-12-31	$330,586
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	$330,586
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	$500,000
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	$2,144,715
Participant contributions at end of year	2022-12-31	$50,746
Participant contributions at beginning of year	2022-12-31	$67,521
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	$1,831,627
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	$919
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	$840,836
Value of net assets at end of year (total assets less liabilities)	2022-12-31	$13,881,069
Value of net assets at beginning of year (total assets less liabilities)	2022-12-31	$13,040,233
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	$13,659,400
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2022-12-31	$12,918,203
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	$2,003
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	$0
Value of interest in common/collective trusts at beginning of year	2022-12-31	$0
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2022-12-31	$170,923
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2022-12-31	$54,509
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2022-12-31	$54,509
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2022-12-31	$1,965
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	$-2,927,369
Net investment gain/loss from pooled separate accounts	2022-12-31	$0
Net investment gain or loss from common/collective trusts	2022-12-31	$0
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	No
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	$890,994
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	$1,416,266
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	AAFCPAS, INC
Accountancy firm EIN	2022-12-31	042571780
Unrealized appreciation/depreciation of real estate assets	2022-01-01	$0
Unrealized appreciation/depreciation of other (non real estate) assets	2022-01-01	$0
Total unrealized appreciation/depreciation of assets	2022-01-01	$0
Total transfer of assets to this plan	2022-01-01	$0
Total transfer of assets from this plan	2022-01-01	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2022-01-01	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2022-01-01	$0
Total income from all sources (including contributions)	2022-01-01	$2,274,521
Total loss/gain on sale of assets	2022-01-01	$0
Total of all expenses incurred	2022-01-01	$1,433,685
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2022-01-01	$1,416,266
Expenses. Certain deemed distributions of participant loans	2022-01-01	$0
Value of total corrective distributions	2022-01-01	$16,500
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2022-01-01	$4,867,336
Value of total assets at end of year	2022-01-01	$13,881,069
Value of total assets at beginning of year	2022-01-01	$13,040,233
Total of administrative expenses incurred including professional, contract, advisory and management fees	2022-01-01	$919
Total income from rents	2022-01-01	$0
Total interest from all sources	2022-01-01	$3,968
Total dividends received (eg from common stock, registered investment company shares)	2022-01-01	$330,586
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2022-01-01	No
Total dividends received from registered investment company shares (eg mutual funds)	2022-01-01	$330,586
Assets. Real estate other than employer real property at end of year	2022-01-01	$0
Assets. Real estate other than employer real property at beginning of year	2022-01-01	$0
Administrative expenses professional fees incurred	2022-01-01	$0
Assets. Corporate prefeered stocks other than exployer securities at end of year	2022-01-01	$0
Assets. Corporate prefeered stocks other than exployer securities at beginning of year	2022-01-01	$0
Was this plan covered by a fidelity bond	2022-01-01	Yes
Value of fidelity bond cover	2022-01-01	$500,000
If this is an individual account plan, was there a blackout period	2022-01-01	No
Were there any nonexempt tranactions with any party-in-interest	2022-01-01	No
Contributions received from participants	2022-01-01	$2,144,715
Participant contributions at end of year	2022-01-01	$50,746
Participant contributions at beginning of year	2022-01-01	$67,521
Participant contributions at end of year	2022-01-01	$0
Participant contributions at beginning of year	2022-01-01	$0
Assets. Other investments not covered elsewhere at end of year	2022-01-01	$0
Assets. Other investments not covered elsewhere at beginning of year	2022-01-01	$0
Income. Received or receivable in cash from other sources (including rollovers)	2022-01-01	$1,831,627
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2022-01-01	$0
Value of other receiveables (less allowance for doubtful accounts) at end of year	2022-01-01	$0
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2022-01-01	$0
Assets. Loans (other than to participants) at end of year	2022-01-01	$0
Assets. Loans (other than to participants) at beginning of year	2022-01-01	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2022-01-01	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2022-01-01	$0
Other income not declared elsewhere	2022-01-01	$0
Administrative expenses (other) incurred	2022-01-01	$919
Liabilities. Value of operating payables at end of year	2022-01-01	$0
Liabilities. Value of operating payables at beginning of year	2022-01-01	$0
Total non interest bearing cash at end of year	2022-01-01	$0
Total non interest bearing cash at beginning of year	2022-01-01	$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	2022-01-01	No
Income. Non cash contributions	2022-01-01	$0
Value of net income/loss	2022-01-01	$840,836
Value of net assets at end of year (total assets less liabilities)	2022-01-01	$13,881,069
Value of net assets at beginning of year (total assets less liabilities)	2022-01-01	$13,040,233
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2022-01-01	No
Were any loans by the plan or fixed income obligations due to the plan in default	2022-01-01	No
Were any leases to which the plan was party in default or uncollectible	2022-01-01	No
Assets. partnership/joint venture interests at end of year	2022-01-01	$0
Assets. partnership/joint venture interests at beginning of year	2022-01-01	$0
Investment advisory and management fees	2022-01-01	$0
Value of interest in registered invesment companies (eg mutual funds) at end of year	2022-01-01	$13,659,400
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2022-01-01	$12,918,203
Value of interest in pooled separate accounts at end of year	2022-01-01	$0
Value of interest in pooled separate accounts at beginning of year	2022-01-01	$0
Interest on participant loans	2022-01-01	$2,003
Income. Interest from loans (other than to participants)	2022-01-01	$0
Interest earned on other investments	2022-01-01	$0
Income. Interest from US Government securities	2022-01-01	$0
Income. Interest from corporate debt instruments	2022-01-01	$0
Value of interest in master investment trust accounts at end of year	2022-01-01	$0
Value of interest in master investment trust accounts at beginning of year	2022-01-01	$0
Value of interest in common/collective trusts at end of year	2022-01-01	$0
Value of interest in common/collective trusts at beginning of year	2022-01-01	$0
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2022-01-01	$170,923
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2022-01-01	$1,965
Assets. Value of investments in 103.12 investment entities at end of year	2022-01-01	$0
Assets. Value of investments in 103.12 investment entities at beginning of year	2022-01-01	$0
Value of funds held in insurance company general accounts (unallocated contracts) at end of year	2022-01-01	$0
Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year	2022-01-01	$0
Expenses. Payments to insurance carriers foe the provision of benefits	2022-01-01	$0
Asset value of US Government securities at end of year	2022-01-01	$0
Asset value of US Government securities at beginning of year	2022-01-01	$0
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2022-01-01	$-2,927,369
Net investment gain/loss from pooled separate accounts	2022-01-01	$0
Net investment gain or loss from common/collective trusts	2022-01-01	$0
Net gain/loss from 103.12 investment entities	2022-01-01	$0
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2022-01-01	No
Was there a failure to transmit to the plan any participant contributions	2022-01-01	No
Has the plan failed to provide any benefit when due under the plan	2022-01-01	No
Assets. Invements in employer securities at end of year	2022-01-01	$0
Assets. Invements in employer securities at beginning of year	2022-01-01	$0
Assets. Value of employer real property at end of year	2022-01-01	$0
Assets. Value of employer real property at beginning of year	2022-01-01	$0
Contributions received in cash from employer	2022-01-01	$890,994
Employer contributions (assets) at end of year	2022-01-01	$0
Employer contributions (assets) at beginning of year	2022-01-01	$0
Income. Dividends from preferred stock	2022-01-01	$0
Income. Dividends from common stock	2022-01-01	$0
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2022-01-01	$1,416,266
Asset. Corporate debt instrument preferred debt at end of year	2022-01-01	$0
Asset. Corporate debt instrument preferred debt at beginning of year	2022-01-01	$0
Asset. Corporate debt instrument debt (other) at end of year	2022-01-01	$0
Asset. Corporate debt instrument debt (other) at beginning of year	2022-01-01	$0
Contract administrator fees	2022-01-01	$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	2022-01-01	No
Assets. Corporate common stocks other than exployer securities at end of year	2022-01-01	$0
Assets. Corporate common stocks other than exployer securities at beginning of year	2022-01-01	$0
Liabilities. Value of benefit claims payable at end of year	2022-01-01	$0
Liabilities. Value of benefit claims payable at beginning of year	2022-01-01	$0
Assets. Value of buildings and other operty used in plan operation at end of year	2022-01-01	$0
Assets. Value of buildings and other operty used in plan operation at beginning of year	2022-01-01	$0
Did the plan have assets held for investment	2022-01-01	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	2022-01-01	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2022-01-01	No
Aggregate proceeds on sale of assets	2022-01-01	$0
Aggregate carrying amount (costs) on sale of assets	2022-01-01	$0
Liabilities. Value of acquisition indebtedness at end of year	2022-01-01	$0
Liabilities. Value of acquisition indebtedness at beginning of year	2022-01-01	$0
Opinion of an independent qualified public accountant for this plan	2022-01-01	1
Accountancy firm name	2022-01-01	AAFCPAS, INC
Accountancy firm EIN	2022-01-01	042571780
2021 : C4 THERAPEUTICS INC 401(K) PLAN 2021 401k financial data
Transfers to/from the plan	2021-12-31	$0
Total plan liabilities at end of year	2021-12-31	$0
Total plan liabilities at beginning of year	2021-12-31	$0
Total income from all sources	2021-12-31	$5,606,784
Expenses. Total of all expenses incurred	2021-12-31	$1,635,233
Benefits paid (including direct rollovers)	2021-12-31	$1,634,202
Total plan assets at end of year	2021-12-31	$13,040,233
Total plan assets at beginning of year	2021-12-31	$9,068,682
Value of fidelity bond covering the plan	2021-12-31	$500,000
Assets. Value of tangible personal property	2021-12-31	$0
Total contributions received or receivable from participants	2021-12-31	$1,817,467
Assets. Value of loans (other than to participants)	2021-12-31	$0
Expenses. Other expenses not covered elsewhere	2021-12-31	$0
Contributions received from other sources (not participants or employers)	2021-12-31	$1,326,206
Other income received	2021-12-31	$1,773,023
Noncash contributions received	2021-12-31	$0
Net income (gross income less expenses)	2021-12-31	$3,971,551
Net plan assets at end of year (total assets less liabilities)	2021-12-31	$13,040,233
Net plan assets at beginning of year (total assets less liabilities)	2021-12-31	$9,068,682
Assets. Value of participant loans	2021-12-31	$67,521
Assets. Value of assets in partnership/joint-venture interests	2021-12-31	$0
Assets. Value of real-estate (other than employer real property)	2021-12-31	$0
Assets. Value of employer securities	2021-12-31	$0
Assets. Value of employer real property	2021-12-31	$0
Total contributions received or receivable from employer(s)	2021-12-31	$690,088
Value of certain deemed distributions of participant loans	2021-12-31	$0
Value of corrective distributions	2021-12-31	$0
Expenses. Administrative service providers (salaries,fees and commissions)	2021-12-31	$1,031
2020 : C4 THERAPEUTICS INC 401(K) PLAN 2020 401k financial data
Transfers to/from the plan	2020-12-31	$0
Total plan liabilities at end of year	2020-12-31	$0
Total plan liabilities at beginning of year	2020-12-31	$0
Total income from all sources	2020-12-31	$3,981,652
Expenses. Total of all expenses incurred	2020-12-31	$285,600
Benefits paid (including direct rollovers)	2020-12-31	$281,980
Total plan assets at end of year	2020-12-31	$9,068,682
Total plan assets at beginning of year	2020-12-31	$5,372,630
Value of fidelity bond covering the plan	2020-12-31	$500,000
Assets. Value of tangible personal property	2020-12-31	$0
Total contributions received or receivable from participants	2020-12-31	$1,371,291
Assets. Value of loans (other than to participants)	2020-12-31	$0
Expenses. Other expenses not covered elsewhere	2020-12-31	$0
Contributions received from other sources (not participants or employers)	2020-12-31	$600,807
Other income received	2020-12-31	$1,452,000
Noncash contributions received	2020-12-31	$0
Net income (gross income less expenses)	2020-12-31	$3,696,052
Net plan assets at end of year (total assets less liabilities)	2020-12-31	$9,068,682
Net plan assets at beginning of year (total assets less liabilities)	2020-12-31	$5,372,630
Assets. Value of participant loans	2020-12-31	$59,958
Assets. Value of assets in partnership/joint-venture interests	2020-12-31	$0
Assets. Value of real-estate (other than employer real property)	2020-12-31	$0
Assets. Value of employer securities	2020-12-31	$0
Assets. Value of employer real property	2020-12-31	$0
Total contributions received or receivable from employer(s)	2020-12-31	$557,554
Value of certain deemed distributions of participant loans	2020-12-31	$0
Value of corrective distributions	2020-12-31	$3,332
Expenses. Administrative service providers (salaries,fees and commissions)	2020-12-31	$288
2019 : C4 THERAPEUTICS INC 401(K) PLAN 2019 401k financial data
Transfers to/from the plan	2019-12-31	$0
Total plan liabilities at end of year	2019-12-31	$0
Total plan liabilities at beginning of year	2019-12-31	$0
Total income from all sources	2019-12-31	$2,828,874
Expenses. Total of all expenses incurred	2019-12-31	$255,738
Benefits paid (including direct rollovers)	2019-12-31	$235,688
Total plan assets at end of year	2019-12-31	$5,372,630
Total plan assets at beginning of year	2019-12-31	$2,799,494
Value of fidelity bond covering the plan	2019-12-31	$500,000
Total contributions received or receivable from participants	2019-12-31	$1,101,565
Expenses. Other expenses not covered elsewhere	2019-12-31	$0
Contributions received from other sources (not participants or employers)	2019-12-31	$370,411
Other income received	2019-12-31	$885,090
Noncash contributions received	2019-12-31	$0
Net income (gross income less expenses)	2019-12-31	$2,573,136
Net plan assets at end of year (total assets less liabilities)	2019-12-31	$5,372,630
Net plan assets at beginning of year (total assets less liabilities)	2019-12-31	$2,799,494
Assets. Value of participant loans	2019-12-31	$7,319
Total contributions received or receivable from employer(s)	2019-12-31	$471,808
Value of certain deemed distributions of participant loans	2019-12-31	$0
Value of corrective distributions	2019-12-31	$19,887
Expenses. Administrative service providers (salaries,fees and commissions)	2019-12-31	$163
2018 : C4 THERAPEUTICS INC 401(K) PLAN 2018 401k financial data
Transfers to/from the plan	2018-12-31	$0
Total plan liabilities at end of year	2018-12-31	$0
Total plan liabilities at beginning of year	2018-12-31	$0
Total income from all sources	2018-12-31	$1,139,974
Expenses. Total of all expenses incurred	2018-12-31	$104,380
Benefits paid (including direct rollovers)	2018-12-31	$104,380
Total plan assets at end of year	2018-12-31	$2,799,494
Total plan assets at beginning of year	2018-12-31	$1,763,900
Value of fidelity bond covering the plan	2018-12-31	$500,000
Total contributions received or receivable from participants	2018-12-31	$830,664
Expenses. Other expenses not covered elsewhere	2018-12-31	$0
Contributions received from other sources (not participants or employers)	2018-12-31	$139,074
Other income received	2018-12-31	$-209,877
Noncash contributions received	2018-12-31	$0
Net income (gross income less expenses)	2018-12-31	$1,035,594
Net plan assets at end of year (total assets less liabilities)	2018-12-31	$2,799,494
Net plan assets at beginning of year (total assets less liabilities)	2018-12-31	$1,763,900
Total contributions received or receivable from employer(s)	2018-12-31	$380,113
Value of certain deemed distributions of participant loans	2018-12-31	$0
Value of corrective distributions	2018-12-31	$0
Expenses. Administrative service providers (salaries,fees and commissions)	2018-12-31	$0
2017 : C4 THERAPEUTICS INC 401(K) PLAN 2017 401k financial data
Transfers to/from the plan	2017-12-31	$0
Total plan liabilities at end of year	2017-12-31	$0
Total plan liabilities at beginning of year	2017-12-31	$0
Total income from all sources	2017-12-31	$1,385,749
Expenses. Total of all expenses incurred	2017-12-31	$392,606
Benefits paid (including direct rollovers)	2017-12-31	$392,556
Total plan assets at end of year	2017-12-31	$1,763,900
Total plan assets at beginning of year	2017-12-31	$770,757
Value of fidelity bond covering the plan	2017-12-31	$500,000
Total contributions received or receivable from participants	2017-12-31	$666,318
Expenses. Other expenses not covered elsewhere	2017-12-31	$0
Contributions received from other sources (not participants or employers)	2017-12-31	$142,702
Other income received	2017-12-31	$253,452
Noncash contributions received	2017-12-31	$0
Net income (gross income less expenses)	2017-12-31	$993,143
Net plan assets at end of year (total assets less liabilities)	2017-12-31	$1,763,900
Net plan assets at beginning of year (total assets less liabilities)	2017-12-31	$770,757
Value of participant contributions where there was a failure to transmit these to the plan within the time period described in 29 CFR 2510.3-102	2017-12-31	$0
Total contributions received or receivable from employer(s)	2017-12-31	$323,277
Value of certain deemed distributions of participant loans	2017-12-31	$0
Value of corrective distributions	2017-12-31	$0
Expenses. Administrative service providers (salaries,fees and commissions)	2017-12-31	$50

Form 5500 Responses for C4 THERAPEUTICS INC 401(K) PLAN

2023: C4 THERAPEUTICS INC 401(K) PLAN 2023 form 5500 responses
2023-01-01	Type of plan entity	Single employer plan
2023-01-01	This submission is the final filing	No
2023-01-01	Plan is a collectively bargained plan	No
2023-01-01	Plan funding arrangement – Trust	Yes
2023-01-01	Plan benefit arrangement - Trust	Yes
2022: C4 THERAPEUTICS INC 401(K) PLAN 2022 form 5500 responses
2022-01-01	Type of plan entity	Single employer plan
2022-01-01	This submission is the final filing	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: C4 THERAPEUTICS INC 401(K) PLAN 2021 form 5500 responses
2021-01-01	Type of plan entity	Single employer plan
2021-01-01	Submission has been amended	No
2021-01-01	This submission is the final filing	No
2021-01-01	This return/report is a short plan year return/report (less than 12 months)	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: C4 THERAPEUTICS INC 401(K) PLAN 2020 form 5500 responses
2020-01-01	Type of plan entity	Single employer plan
2020-01-01	This submission is the final filing	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: C4 THERAPEUTICS INC 401(K) PLAN 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: C4 THERAPEUTICS INC 401(K) PLAN 2018 form 5500 responses
2018-01-01	Type of plan entity	Single employer plan
2018-01-01	Submission has been amended	No
2018-01-01	This submission is the final filing	No
2018-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2018-01-01	Plan is a collectively bargained plan	No
2018-01-01	Plan funding arrangement – Trust	Yes
2018-01-01	Plan benefit arrangement - Trust	Yes
2017: C4 THERAPEUTICS INC 401(K) PLAN 2017 form 5500 responses
2017-01-01	Type of plan entity	Single employer plan
2017-01-01	Submission has been amended	No
2017-01-01	This submission is the final filing	No
2017-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2017-01-01	Plan is a collectively bargained plan	No
2017-01-01	Plan funding arrangement – Trust	Yes
2017-01-01	Plan benefit arrangement - Trust	Yes

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Company Name:	C4 THERAPEUTICS INC
Employer identification number (EIN):	475617627
NAIC Classification:	541700

Plan id#	Filing Submission Date	Name of Administrator	Date Administrator Signed	Name of Company Sponsor	Date Sponsor Signed
001	2024-01-01	MELISSA EPSTEIN
001	2023-01-01
001	2023-01-01	MELISSA EPSTEIN
001	2022-01-01
001	2022-01-01	MELISSA EPSTEIN
001	2021-01-01
001	2021-01-01	MELISSA EPSTEIN
001	2020-01-01
001	2019-01-01
001	2018-01-01
001	2017-01-01	LAURA WAHLBERG		LAURA WAHLBERG	2018-10-09
001	2016-01-01	LAURA WAHLBERG	2017-07-07