Sotera Health Company has 21 Schedule 13D or 13G filings on record since 2025-09-10. 6 holders' latest filing reports 5% or more of common stock, par value $0.01 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Sessa Capital IM, L.P. | 9.5% | 27,050,000 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Darsana Capital Partners LP | 8.8% | 25,000,000 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Sculptor Capital LP | 8.41% | 24,000,000 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| BlackRock, Inc. | 8.4% | 23,845,504 | SCHEDULE 13G/A, 2026-07-30 | 2026-06-30 |
| Sessa Capital GP, LLC | 7.23% | 20,550,000 | SCHEDULE 13G, 2026-02-17 | 2025-12-31 |
| Sachem Head Capital Management LP | 5.46% | 15,560,000 | SCHEDULE 13G, 2026-05-15 | 2026-05-11 |
| Gtcr Investment Xi LLC | 0% | 0 | SCHEDULE 13G/A, 2026-05-15 | 2026-05-13 |
| Warburg Pincus & Co. | 0% | 0 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-06 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-27 | 2026-03-13 |
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-09-10 | Gtcr Investment Xi LLC | 36.3% | SCHEDULE 13G/A |
| 2025-09-10 | WP XI Partners, L.P. | 36.3% | SCHEDULE 13G/A |
| 2025-09-11 | Sculptor Capital LP | 5.19% | SCHEDULE 13G |
| 2025-10-17 | BlackRock, Inc. | 5.2% | SCHEDULE 13G |
| 2025-11-12 | Gtcr Investment Xi LLC | 25.7% | SCHEDULE 13G/A |
| 2025-11-12 | WP XI Partners, L.P. | 25.7% | SCHEDULE 13G/A |
| 2025-11-14 | Darsana Capital Partners LP | 8.8% | SCHEDULE 13G/A |
| 2025-12-19 | Gtcr Investment Xi LLC | 20% | SCHEDULE 13G/A |
| 2026-01-21 | BlackRock, Inc. | 6.2% | SCHEDULE 13G/A |
| 2026-01-30 | The Vanguard Group | 6.76% | SCHEDULE 13G/A |
| 2026-02-13 | Sculptor Capital LP | 7.39% | SCHEDULE 13G/A |
| 2026-02-17 | Sessa Capital GP, LLC | 7.23% | SCHEDULE 13G |
| 2026-03-10 | Gtcr Investment Xi LLC | 11.2% | SCHEDULE 13G/A |
| 2026-03-10 | Warburg Pincus & Co. | 11.2% | SCHEDULE 13G/A |
| 2026-03-27 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-05-15 | Sachem Head Capital Management LP | 5.46% | SCHEDULE 13G |
| 2026-05-15 | Gtcr Investment Xi LLC | 0% | SCHEDULE 13G/A |
| 2026-05-15 | Warburg Pincus & Co. | 0% | SCHEDULE 13G/A |
| 2026-07-30 | BlackRock, Inc. | 8.4% | SCHEDULE 13G/A |
| 2026-08-14 | Sessa Capital IM, L.P. | 9.5% | SCHEDULE 13G/A |
| 2026-08-14 | Sculptor Capital LP | 8.41% | SCHEDULE 13G/A |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.