As of November 7, 2026, 6 holders' latest Schedule 13D or 13G filings report owning 5% or more of Sotera Health Co. The largest reported stake is Sessa Capital IM, L.P.'s, at 9.5%. 23 filings are on record since September 10, 2025 (Schedule 13G/A, August 14, 2026).
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Key facts
- · Reporting person: Vanguard Capital Management · Sole voting: 2,235,378 · Shared voting: 0 · Sole dispositive: 14,625,165 · Shared dispositive: 0 · SCHEDULE 13G, 2026-10-30
- · Holder: Sachem Head Capital Management LP · Percent: 0% · Shares: 0 · SCHEDULE 13G/A
- · Reporting person: Sessa Capital IM, L.P. · Sole voting: 0 · Shared voting: 27,050,000 · Sole dispositive: 0 · Shared dispositive: 27,050,000 · SCHEDULE 13G/A, 2026-08-14
- · Reporting person: Sculptor Capital LP · Sole voting: 0 · Shared voting: 24,000,000 · Sole dispositive: 0 · Shared dispositive: 24,000,000 · SCHEDULE 13G/A, 2026-08-14
- · Reporting person: BlackRock, Inc. · Sole voting: 23,160,503 · Shared voting: 0 · Sole dispositive: 23,845,504 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-07-30
Sotera Health Co has 23 Schedule 13D or 13G filings on record since 2025-09-10. 6 holders' latest filing reports 5% or more of common stock. 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 |
| Vanguard Capital Management | 5.12% | 14,625,165 | SCHEDULE 13G, 2026-10-30 | 2026-09-30 |
| 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 |
| Sachem Head Capital Management LP | 0% | 0 | SCHEDULE 13G/A, 2026-10-09 | 2026-10-09 |
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More on Sotera Health Co and the records around it.
Sotera Health Co elsewhere on the record
- Leadership changes Aug 2026
- Who owns it
Companies that share a holder
- GTCR INVESTMENT XI LLC also filed stake reports on 1 other company: Vivid Seats Inc. (Nov 2025)
- Sachem Head Capital Management LP also filed stake reports on 1 other company: Ionic Digital Inc. (Oct 2026)
- Sessa Capital (Master), L.P. also filed stake reports on 2 other companies: Fortrea Holdings Inc. (Feb 2026), Garrett Motion Inc. (Aug 2025)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Sessa Capital IM, L.P. | 0 | 27,050,000 | 0 | 27,050,000 | SCHEDULE 13G/A, 2026-08-14 |
| John Petry | 0 | 27,050,000 | 0 | 27,050,000 | SCHEDULE 13G/A, 2026-08-14 |
| Sculptor Capital LP | 0 | 24,000,000 | 0 | 24,000,000 | SCHEDULE 13G/A, 2026-08-14 |
| Sculptor Capital II LP | 0 | 24,000,000 | 0 | 24,000,000 | SCHEDULE 13G/A, 2026-08-14 |
| Sculptor Capital Holding Corp | 0 | 24,000,000 | 0 | 24,000,000 | SCHEDULE 13G/A, 2026-08-14 |
| Sculptor Capital Holding II LLC | 0 | 24,000,000 | 0 | 24,000,000 | SCHEDULE 13G/A, 2026-08-14 |
| Sculptor Capital Management, Inc. | 0 | 24,000,000 | 0 | 24,000,000 | SCHEDULE 13G/A, 2026-08-14 |
| Sculptor Master Fund, Ltd. | 0 | 24,000,000 | 0 | 24,000,000 | SCHEDULE 13G/A, 2026-08-14 |
| BlackRock, Inc. | 23,160,503 | 0 | 23,845,504 | 0 | SCHEDULE 13G/A, 2026-07-30 |
| Vanguard Capital Management | 2,235,378 | 0 | 14,625,165 | 0 | SCHEDULE 13G, 2026-10-30 |
| Sachem Head Capital Management LP | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-10-09 |
| Uncas GP LLC | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-10-09 |
| Sachem Head GP LLC | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-10-09 |
| Ferguson Scott D. | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-10-09 |
The latest filing identifies Sotera Health Co by CUSIP 83601L102 and gives its principal executive office as 9100 South Hills Blvd, Suite 300, Broadview Height, OH 44147 (SCHEDULE 13G, 2026-10-30).
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 |
| 2026-10-09 | Sachem Head Capital Management LP | 0% | SCHEDULE 13G/A |
| 2026-10-30 | Vanguard Capital Management | 5.12% | SCHEDULE 13G |
Questions about who owns Sotera Health Co
Who owns Sotera Health Co?
On this page, 6 holders' latest ownership filings report 5% or more of Sotera Health Co: Sessa Capital IM, L.P. (9.5%, Schedule 13G/A, filed 2026-08-14), Darsana Capital Partners LP (8.8%, Schedule 13G/A, filed 2025-11-14), Sculptor Capital LP (8.41%, Schedule 13G/A, filed 2026-08-14), BlackRock, Inc. (8.4%, Schedule 13G/A, filed 2026-07-30) and Sessa Capital GP, LLC (7.23%, Schedule 13G, filed 2026-02-17); 1 more is listed above.
Who are the largest shareholders of Sotera Health Co?
By the share each holder's latest filing reports, the largest holders of Sotera Health Co on this page are Sessa Capital IM, L.P. (9.5%), Darsana Capital Partners LP (8.8%) and Sculptor Capital LP (8.41%).
When did Sessa Capital IM, L.P. buy into Sotera Health Co?
The filings give report dates, not purchase dates. The earliest filing from Sessa Capital IM, L.P. on this page is the Schedule 13G/A, filed 2026-08-14, reporting 9.5%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 23 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Sotera Health Co
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| August 14, 2026 | Leadership change: James C. Neary departs, Director | — | Leadership changes | Source |
| May 5, 2026 | Leadership change: Alton Shader appointed, Chief Executive Officer, and 2 more | — | Leadership changes | Source |
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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.