According to recent filings covering the 90 days ending December 12, 2025, the three most significant insider holders at Sotera Health are Director Pincus & Co. Warburg (34.10Mn shares), Director Investment Xi Llc Gtcr (22.74Mn shares), SVP And General Counsel And Sec. Alexander Dimitrief (334.73K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Pincus & Co. Warburg | 34,102,952 | 05 Dec, 2025 | |
| Investment Xi Llc Gtcr | 22,735,301 | 05 Dec, 2025 | |
| Scott J. Leffler | CFO And Treasurer | 738,649 | 04 Mar, 2022 |
| Michael B. Jr. Petras | Chairman & CEO | 552,790 | 10 Dec, 2025 |
| Michael P Rutz | President Of Sterigenics | 450,204 | 26 Aug, 2025 |
| Alexander Dimitrief | SVP And General Counsel And Sec. | 334,725 | 04 Mar, 2025 |
| Matthew J Klaben | SVP And GC And Secretary | 327,286 | 24 Mar, 2021 |
| Jonathan M. Lyons | Sr. Vice President And Cfo | 189,602 | 07 Aug, 2025 |
| Ann R. Klee | 125,956 | 27 May, 2025 | |
| Ruoxi Chen | 80,781 | 27 May, 2025 | |
| Vincent K Petrella | 80,781 | 27 May, 2025 | |
| Sean Laurence Cunningham | 80,781 | 27 May, 2025 | |
| Constantine S Mihas | 80,781 | 27 May, 2025 | |
| James Neary | 80,781 | 27 May, 2025 | |
| David E. Wheadon | 74,912 | 27 May, 2025 | |
| David Donnini | 61,649 | 29 May, 2024 | |
| Robert Brown Knauss | 54,933 | 27 May, 2025 | |
| Karen Flynn | 39,221 | 27 May, 2025 | |
| Terry Hammons | SVP And GC And Secretary | 31,257 | 04 Mar, 2022 |
| Stephanie Geveda | 25,848 | 31 May, 2022 | |
| Christopher Simon, | 19,132 | 27 May, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 08 Dec, 2025 | Michael B. Jr. Petras | Common Stock, $0.01 par value per share ("Common Stock") | D | 315,896 | $16.45 | 552,790 | D | S |
| 08 Dec, 2025 | Michael B. Jr. Petras | Common Stock | D | 394,861 | $16.45 | 4,819,393 | I | S |
| 08 Dec, 2025 | Michael B. Jr. Petras | Common Stock | D | 39,243 | $16.45 | 0 | I | S |
| 03 Dec, 2025 | Pincus & Co. Warburg | Common Stock, $0.01 par value per share ("Common Stock") | D | 9,720,000 | $16.33 | 34,102,952 | I | S |
| 03 Dec, 2025 | Pincus & Co. Warburg | Common Stock, $0.01 par value per share ("Common Stock") | D | 9,720,000 | $16.33 | 34,102,952 | I | S |
| 03 Dec, 2025 | Investment Xi Llc Gtcr | Common Stock, $0.01 par value per share ("Common Stock") | D | 6,480,000 | $16.33 | 22,735,301 | I | S |
| 10 Nov, 2025 | Investment Xi Llc Gtcr | Common Stock, $0.01 par value per share ("Common Stock") | D | 12,000,000 | $15.65 | 29,215,301 | I | S |
| 10 Nov, 2025 | Pincus & Co. Warburg | Common Stock, $0.01 par value per share ("Common Stock") | D | 18,000,000 | $15.65 | 43,822,952 | I | S |
| 10 Nov, 2025 | Pincus & Co. Warburg | Common Stock, $0.01 par value per share ("Common Stock") | D | 18,000,000 | $15.65 | 43,822,952 | I | S |
| 05 Sep, 2025 | Pincus & Co. Warburg | Common Stock, $0.01 par value per share ("Common Stock") | D | 12,000,000 | $15.11 | 61,822,952 | I | S |
| 05 Sep, 2025 | Investment Xi Llc Gtcr | Common Stock, $0.01 par value per share ("Common Stock") | D | 8,000,000 | $15.11 | 41,215,301 | I | S |
| 05 Sep, 2025 | Pincus & Co. Warburg | Common Stock, $0.01 par value per share ("Common Stock") | D | 12,000,000 | $15.11 | 61,822,952 | I | S |
| 22 Aug, 2025 | Michael P Rutz | Common Stock | D | 126,611 | $16.38 | 450,204 | D | S |
| 22 Aug, 2025 | Michael P Rutz | - | - | 450,204 | D | |||
| 05 Aug, 2025 | Jonathan M. Lyons | - | - | 189,602 | D | |||
| 05 Aug, 2025 | Jonathan M. Lyons | Common Stock, $0.01 par value per share ("Common Stock") | D | 11,508 | $11.19 | 189,602 | D | F |
| 22 May, 2025 | Sean Laurence Cunningham | Common Stock, $0.01 par value per share ("Common Stock") | A | 19,132 | $0.00 | 80,781 | D | A |
| 22 May, 2025 | Ruoxi Chen | Common Stock, $0.01 par value per share ("Common Stock") | A | 19,132 | $0.00 | 80,781 | D | A |
| 22 May, 2025 | David E. Wheadon | Common Stock, $0.01 par value per share ("Common Stock") | A | 19,132 | $0.00 | 74,912 | D | A |
| 22 May, 2025 | James Neary | Common Stock, $0.01 par value per share ("Common Stock") | A | 19,132 | $0.00 | 80,781 | D | A |