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| Company Name: | MISO |
| Employer identification number (EIN): | 431827033 |
| NAIC Classification: | 221100 |
The following addresses have been detected on the 401k submissions:
| USA Mailing Address | |||||
|---|---|---|---|---|---|
| |||||
| Date first seen: 2007-01-01 | |||||
| Date last seen: 2025-12-03 | |||||
| USA Location Address | |||||
|---|---|---|---|---|---|
| |||||
| Date first seen: 2007-01-01 | |||||
| Date last seen: 2025-06-30 | |||||
| USA Location Address | |||||
|---|---|---|---|---|---|
| |||||
| Date first seen: 2011-05-26 | |||||
| Date last seen: 2011-05-26 | |||||
| USA Location Address | |||||
|---|---|---|---|---|---|
| |||||
| Date first seen: 2007-01-01 | |||||
| Date last seen: 2025-09-30 | |||||
| USA Mailing Address | |||||
|---|---|---|---|---|---|
| |||||
| Date first seen: 2010-07-23 | |||||
| Date last seen: 2010-07-23 | |||||
| USA Mailing Address | |||||
|---|---|---|---|---|---|
| |||||
| Date first seen: 2007-01-01 | |||||
| Date last seen: 2025-12-04 | |||||
| 401k Sponsor USA Address | |||||
|---|---|---|---|---|---|
| |||||
| Date first seen: 2025-07-31 | |||||
| Date last seen: 2025-02-03 | |||||
| 401k Sponsor USA Address | |||||
|---|---|---|---|---|---|
| |||||
| Date first seen: 2007-01-01 | |||||
| Date last seen: 2025-09-30 | |||||
| Date | Description |
|---|---|
| 2021-10-15 | 431827033 Change of name detected from MIDCONTINENT INDEPENDENT SYSTEMS OPERATOR, INC. to MIDCONTINENT INDEPENDENT SYSTEM OPERATOR, INC. |
| 2021-10-12 | 431827033 Change of name detected from MIDCONTINENT INDEPENDENT SYSTEM OPERATOR, INC. to MIDCONTINENT INDEPENDENT SYSTEMS OPERATOR, INC. |
| 2021-10-11 | 431827033 Change of name detected from MIDCONTINENT INDEPENDENT SYSTEM OPERATOR, INC. to MISO |
| Plan id# | Plan Name | Plan Start Date | Plan Effective Date |
|---|---|---|---|
| 001 | MISO EMPLOYEES' RETIREMENT SAVINGS PLAN | 2015-01-01 | 1999-08-01 |
| 501 | MIDCONTINENT INDEPENDENT SYSTEM OPERATOR, INC. FLEXIBLE BENEFITS PLAN | 2015-01-01 | 2011-01-01 |
| 503 | MIDCONTINENT INDEPENDENT SYSTEM OPERATOR, INC. EMPLOYEE BENEFIT PLAN | 2015-01-01 | 2002-01-01 |
| 502 | MISO VOLUNTARY EMPLOYEE BENEFICIARY ASSOCIATION PLAN AND TRUST | 2015-01-01 | 2006-01-01 |
| 002 | MIDWEST ISO FLOOR-OFFSET PLAN | 2012-01-01 | 2002-01-01 |
| 515 | MIDWEST ISO RETIREE MEDICAL PLAN | 2011-01-01 | 2002-11-27 |
| 504 | MIDWEST INDEPENDENT TRANSMISSION SYSTEM OPERATOR, INC. GROUP LIFE PLAN | 2009-01-01 | 2002-01-01 |
| 507 | MIDWEST INDEPENDENT TRANSMISSION SYSTEM OPERATOR, INC. GROUP VOLUNTARY LIFE PLAN | 2010-01-01 | 2004-01-01 |
| 510 | MIDCONTINENT INDEPENDENT SYSTEMS OPERATOR, INC. EMPLOYEE BENEFIT PLAN | 2023-01-01 | 2023-01-01 |
| Date | Type of contribution | Contribution | Number of participants/employees | Average contribution per participant | |
|---|---|---|---|---|---|
| 2021-12-29 | Employer Contributions | $ 37,505 | 924 | $ 41 | |
| 2021-12-29 | Employee Contributions | $ 37,505 | 924 | $ 41 | |
| 2021-12-23 | Employer Contributions | $ 418,000 | 924 | $ 452 | |
| 2021-12-23 | Employee Contributions | $ 418,000 | 924 | $ 452 | |
| 2020-04-01 | Employer Contributions | $ 250,000 | 966 | $ 259 | |
| 2020-04-01 | Employee Contributions | $ 250,000 | 966 | $ 259 | |
| 2019-04-24 | Employer Contributions | $ 250,000 | 966 | $ 259 | |
| 2019-04-24 | Employee Contributions | $ 250,000 | 966 | $ 259 | |
| 2018-04-13 | Employer Contributions | $ 200,000 | 955 | $ 209 | |
| 2018-04-13 | Employee Contributions | $ 200,000 | 955 | $ 209 | |
| 2017-04-11 | Employer Contributions | $ 200,000 | 925 | $ 216 | |
| 2017-04-11 | Employee Contributions | $ 200,000 | 925 | $ 216 | |
| 2016-04-12 | Employer Contributions | $ 200,000 | 891 | $ 224 | |
| 2016-04-12 | Employee Contributions | $ 200,000 | 891 | $ 224 | |
| 2015-04-08 | Employer Contributions | $ 160,000 | 857 | $ 187 | |
| 2015-04-08 | Employee Contributions | $ 160,000 | 857 | $ 187 | |
| 2014-03-31 | Employer Contributions | $ 150,000 | 799 | $ 188 | |
| 2014-03-31 | Employee Contributions | $ 150,000 | 799 | $ 188 | |
| 2013-04-08 | Employer Contributions | $ 100,000 | 795 | $ 126 | |
| 2013-04-08 | Employee Contributions | $ 100,000 | 795 | $ 126 | |
| 2013-03-21 | Employer Contributions | $ 7,000 | 795 | $ 9 | |
| 2013-03-21 | Employee Contributions | $ 7,000 | 795 | $ 9 | |
| 2013-03-11 | Employer Contributions | $ 97,000 | 795 | $ 122 | |
| 2013-03-11 | Employee Contributions | $ 97,000 | 795 | $ 122 | |
| 2012-03-27 | Employer Contributions | $ 94,500 | 767 | $ 123 | |
| 2012-03-27 | Employee Contributions | $ 94,500 | 767 | $ 123 | |
| 2011-04-15 | Employer Contributions | $ 91,977 | 668 | $ 138 | |
| 2011-04-15 | Employee Contributions | $ 91,977 | 668 | $ 138 |
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