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| Company Name: | OPEN SOCIETY INSTITUTE |
| Employer identification number (EIN): | 137029285 |
| NAIC Classification: | 813000 |
| NAIC Description: | Religious, Grantmaking, Civic, Professional, and Similar Organizations |
The following addresses have been detected on the 401k submissions:
| USA Mailing Address | |||||
|---|---|---|---|---|---|
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| Date first seen: 2007-01-01 | |||||
| Date last seen: 2025-12-03 | |||||
| USA Location Address | ||||||
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| Date first seen: 2007-01-01 | ||||||
| Date last seen: 2025-09-30 | ||||||
| USA Mailing Address | |||||
|---|---|---|---|---|---|
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| Date first seen: 2010-11-02 | |||||
| Date last seen: 2011-12-05 | |||||
| USA Location Address | |||||
|---|---|---|---|---|---|
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| Date first seen: 2022-10-17 | |||||
| Date last seen: 2025-12-02 | |||||
| USA Mailing Address | |||||
|---|---|---|---|---|---|
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| Date first seen: 2025-07-30 | |||||
| Date last seen: 2025-12-02 | |||||
| USA Mailing Address | |||||
|---|---|---|---|---|---|
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| Date first seen: 2007-01-01 | |||||
| Date last seen: 2025-10-03 | |||||
| USA Location Address | |||||
|---|---|---|---|---|---|
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| Date first seen: 2007-01-01 | |||||
| Date last seen: 2025-10-03 | |||||
| USA Location Address | |||||
|---|---|---|---|---|---|
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| Date first seen: 2007-01-01 | |||||
| Date last seen: 2025-10-03 | |||||
| USA Mailing Address | |||||
|---|---|---|---|---|---|
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| Date first seen: 2007-01-01 | |||||
| Date last seen: 2025-11-23 | |||||
| Date | Description |
|---|---|
| 2021-10-15 | 137029285 Change of name detected from THE OPEN SOCIETY INSTITUTE to OPEN SOCIETY INSTITUTE |
| Plan id# | Plan Name | Plan Start Date | Plan Effective Date |
|---|---|---|---|
| 001 | THE OPEN SOCIETY INSTITUTE TAX SHELTERED RETIREMENT PLAN | 2015-01-01 | 1993-12-23 |
| 504 | OPEN SOCIETY FOUNDATIONS FLEXIBLE SPENDING ACCOUNT | 2015-01-01 | 2005-01-01 |
| 502 | OPEN SOCIETY INSTITUTE HEALTH AND WELFARE BENEFITS PLAN | 2016-06-01 | 1994-08-01 |
| 506 | OPEN SOCIETY INSTITUTE INVOLUNTARY SEPARATION PLAN | 2021-06-10 | 2021-06-10 |
| 505 | OPEN SOCIETY INSTITUTE 2021 VOLUNTARY SEPARATION PLAN FOR EMPLOYEES | 2021-05-06 | 2021-05-06 |
| 507 | OPEN SOCIETY INSTITUTE 2021 VOLUNTARY SEPARATION PLAN II | 2021-11-15 | 2021-11-15 |
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