The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 26, 2026 | Shader Alton | Chief Executive Officer, Director | Grant(A) | 102K | — | $0 |
| May 26, 2026 | Shader Alton | Chief Executive Officer, Director | Grant(A) | 204K | — | $0 |
| May 26, 2026 | Shader Alton | Chief Executive Officer, Director | Grant(A) | 376K | — | $0 |
| May 22, 2026 | Krause Kenneth D. | Director | Grant(A) | 15K | — | $0 |
| May 22, 2026 | Simon, Christopher | Director | Grant(A) | 15K | — | $0 |
| May 22, 2026 | Wheadon David E. | Director | Grant(A) | 15K | — | $0 |
| May 22, 2026 | Neary James | Director | Grant(A) | 15K | — | $0 |
| May 22, 2026 | Petrella Vincent K | Director | Grant(A) | 15K | — | $0 |
| May 22, 2026 | Klee Ann R. | Director | Grant(A) | 15K | — | $0 |
| May 22, 2026 | Flynn Karen | Director | Grant(A) | 15K | — | $0 |
| May 22, 2026 | Cunningham Sean Laurence | Director | Grant(A) | 15K | — | $0 |
| May 22, 2026 | Chen Ruoxi | Director | Grant(A) | 15K | — | $0 |
| May 22, 2026 | Kyle Richard G | Director | Grant(A) | 15K | — | $0 |
| May 13, 2026 | Warburg Pincus & Co. | Director, 10% Owner | Sell(S) | 19.1M | $15.17 | $289.8M |
| May 13, 2026 | GTCR Investment XI LLC | Director, 10% Owner | Sell(S) | 12.7M | $15.17 | $193.2M |
| May 13, 2026 | Warburg Pincus & Co. | Director, 10% Owner | Sell(S) | 19.1M | $15.17 | $289.8M |
| Mar 31, 2026 | Dimitrief Alexander | Former SVP, GC and Sec. | Tax withholding(F) | 8K | $14.34 | $114K |
| Mar 6, 2026 | GTCR Co-Invest XI LP | Director, 10% Owner | Sell(S) | 10.0M | $15.27 | $152.7M |
| Mar 6, 2026 | Warburg Pincus Partners II, L.P. | Director, 10% Owner | Sell(S) | 15.0M | $15.27 | $229.1M |
| Mar 6, 2026 | Warburg Pincus Partners GP LLC | Director, 10% Owner | Sell(S) | 15.0M | $15.27 | $229.1M |
| Mar 2, 2026 | Rutz Michael P | President of Sterigenics | Grant(A) | 45K | — | $0 |
| Mar 2, 2026 | Rutz Michael P | President of Sterigenics | Tax withholding(F) | 17K | $15.91 | $278K |
| Mar 2, 2026 | Rutz Michael P | President of Sterigenics | Option exercise(M) | 15K | — | — |
| Mar 2, 2026 | Rutz Michael P | President of Sterigenics | Tax withholding(F) | 4K | $15.91 | $59K |
| Mar 2, 2026 | Rutz Michael P | President of Sterigenics | Tax withholding(F) | 4K | $15.91 | $72K |
| Mar 2, 2026 | Rutz Michael P | President of Sterigenics | Option exercise(M) | 15K | — | — |
| Mar 2, 2026 | Rutz Michael P | President of Sterigenics | Grant(A) | 23K | — | $0 |
| Mar 2, 2026 | Lyons Jonathan M. | Sr. Vice President, CFO | Tax withholding(F) | 6K | $15.91 | $96K |
| Mar 2, 2026 | Lyons Jonathan M. | Sr. Vice President, CFO | Option exercise(M) | 18K | — | — |
| Mar 2, 2026 | Lyons Jonathan M. | Sr. Vice President, CFO | Grant(A) | 59K | — | $0 |
| Mar 2, 2026 | Lyons Jonathan M. | Sr. Vice President, CFO | Tax withholding(F) | 8K | $15.91 | $131K |
| Mar 2, 2026 | Lyons Jonathan M. | Sr. Vice President, CFO | Tax withholding(F) | 24K | $15.91 | $382K |
| Mar 2, 2026 | Lyons Jonathan M. | Sr. Vice President, CFO | Grant(A) | 30K | — | $0 |
| Mar 2, 2026 | Lyons Jonathan M. | Sr. Vice President, CFO | Option exercise(M) | 18K | — | — |
| Mar 2, 2026 | Dimitrief Alexander | SVP, General Counsel and Sec. | Tax withholding(F) | 8K | $15.91 | $126K |
| Mar 2, 2026 | Dimitrief Alexander | SVP, General Counsel and Sec. | Tax withholding(F) | 24K | $15.91 | $376K |
| Mar 2, 2026 | Dimitrief Alexander | SVP, General Counsel and Sec. | Option exercise(M) | 17K | — | — |
| Mar 2, 2026 | Dimitrief Alexander | SVP, General Counsel and Sec. | Option exercise(M) | 17K | — | — |
| Mar 2, 2026 | Petras Michael B. Jr. | Chairman & CEO, Director | Tax withholding(F) | 31K | $15.91 | $499K |
| Mar 2, 2026 | Petras Michael B. Jr. | Chairman & CEO, Director | Tax withholding(F) | 40K | $15.91 | $641K |
| Mar 2, 2026 | Petras Michael B. Jr. | Chairman & CEO, Director | Grant(A) | 240K | — | $0 |
| Mar 2, 2026 | Petras Michael B. Jr. | Chairman & CEO, Director | Tax withholding(F) | 40K | $15.91 | $629K |
| Mar 2, 2026 | Petras Michael B. Jr. | Chairman & CEO, Director | Tax withholding(F) | 79K | $15.91 | $1.3M |
| Mar 2, 2026 | Petras Michael B. Jr. | Chairman & CEO, Director | Option exercise(M) | 90K | — | — |
| Mar 2, 2026 | Petras Michael B. Jr. | Chairman & CEO, Director | Grant(A) | 120K | — | $0 |
| Mar 2, 2026 | Petras Michael B. Jr. | Chairman & CEO, Director | Option exercise(M) | 90K | — | — |
| Dec 8, 2025 | Petras Michael B. Jr. | Chairman & CEO, Director | Sell(S) | 316K | $16.45 | $5.2M |
| Dec 8, 2025 | Petras Michael B. Jr. | Chairman & CEO, Director | Sell(S) | 395K | $16.45 | $6.5M |
| Dec 8, 2025 | Petras Michael B. Jr. | Chairman & CEO, Director | Sell(S) | 39K | $16.45 | $646K |
| Dec 3, 2025 | GTCR Fund Xi/a LP | Director, 10% Owner | Sell(S) | 6.5M | $16.33 | $105.8M |
| Dec 3, 2025 | Warburg Pincus Partners GP LLC | Director, 10% Owner | Sell(S) | 9.7M | $16.33 | $158.7M |
| Dec 3, 2025 | Warburg Pincus LLC | Director, 10% Owner | Sell(S) | 9.7M | $16.33 | $158.7M |
| Nov 10, 2025 | GTCR Fund Xi/a LP | Director, 10% Owner | Sell(S) | 12.0M | $15.65 | $187.8M |
| Nov 10, 2025 | Warburg Pincus Partners II, L.P. | Director | Sell(S) | 18.0M | $15.65 | $281.7M |
| Nov 10, 2025 | Warburg Pincus Private Equity XI-C, L.P. | Director, 10% Owner | Sell(S) | 18.0M | $15.65 | $281.7M |
| Sep 5, 2025 | GTCR Investment XI LLC | Director, 10% Owner | Sell(S) | 8.0M | $15.11 | $120.9M |
| Sep 5, 2025 | Warburg Pincus & Co. | Director, 10% Owner | Sell(S) | 12.0M | $15.11 | $181.3M |
| Sep 5, 2025 | Warburg Pincus XI-C, LLC | Director, 10% Owner | Sell(S) | 12.0M | $15.11 | $181.3M |
| Aug 22, 2025 | Rutz Michael P | President of Sterigenics | Sell(S) | 127K | $16.38 | $2.1M |
| Aug 5, 2025 | Lyons Jonathan M. | Sr. Vice President, CFO | Tax withholding(F) | 12K | $11.19 | $129K |
| May 22, 2025 | Simon, Christopher | Director | Grant(A) | 19K | — | $0 |
| May 22, 2025 | Chen Ruoxi | Director | Grant(A) | 19K | — | $0 |
| May 22, 2025 | Cunningham Sean Laurence | Director | Grant(A) | 19K | — | $0 |
| May 22, 2025 | Klee Ann R. | Director | Grant(A) | 19K | — | $0 |
| May 22, 2025 | Mihas Constantine S | Director | Grant(A) | 19K | — | $0 |
| May 22, 2025 | Neary James | Director | Grant(A) | 19K | — | $0 |
| May 22, 2025 | Petrella Vincent K | Director | Grant(A) | 19K | — | $0 |
| May 22, 2025 | Wheadon David E. | Director | Grant(A) | 19K | — | $0 |
| May 22, 2025 | Knauss Robert Brown | Director | Grant(A) | 19K | — | $0 |
| May 22, 2025 | Flynn Karen | Director | Grant(A) | 19K | — | $0 |
| Mar 3, 2025 | Dimitrief Alexander | SVP, General Counsel and Sec. | Grant(A) | 56K | — | $0 |
| Mar 3, 2025 | Dimitrief Alexander | SVP, General Counsel and Sec. | Grant(A) | 28K | — | $0 |
| Mar 3, 2025 | Lyons Jonathan M. | Sr. Vice President, CFO | Grant(A) | 60K | — | $0 |
| Mar 3, 2025 | Lyons Jonathan M. | Sr. Vice President, CFO | Grant(A) | 37K | — | $0 |
| Mar 3, 2025 | Lyons Jonathan M. | Sr. Vice President, CFO | Grant(A) | 30K | — | $0 |
| Mar 3, 2025 | Rutz Michael P | President of Sterigenics | Grant(A) | 49K | — | $0 |
| Mar 3, 2025 | Rutz Michael P | President of Sterigenics | Grant(A) | 24K | — | $0 |
| Mar 3, 2025 | Petras Michael B. Jr. | Chairman & CEO, Director | Grant(A) | 299K | — | $0 |
| Mar 3, 2025 | Petras Michael B. Jr. | Chairman & CEO, Director | Grant(A) | 149K | — | $0 |
| Mar 2, 2025 | Dimitrief Alexander | SVP, General Counsel and Sec. | Tax withholding(F) | 8K | $12.47 | $102K |
| Mar 2, 2025 | Lyons Jonathan M. | Sr. Vice President, CFO | Tax withholding(F) | 6K | $12.47 | $81K |
| Mar 2, 2025 | Rutz Michael P | President of Sterigenics | Tax withholding(F) | 4K | $12.47 | $46K |
| Mar 2, 2025 | Rutz Michael P | President of Sterigenics | Tax withholding(F) | 4K | $12.47 | $52K |
| Mar 2, 2025 | Rutz Michael P | President of Sterigenics | Tax withholding(F) | 5K | $12.47 | $67K |
| Mar 2, 2025 | Petras Michael B. Jr. | Chairman & CEO, Director | Tax withholding(F) | 41K | $12.47 | $511K |
| Mar 2, 2025 | Petras Michael B. Jr. | Chairman & CEO, Director | Tax withholding(F) | 32K | $12.47 | $397K |
| Mar 2, 2025 | Petras Michael B. Jr. | Chairman & CEO, Director | Tax withholding(F) | 28K | $12.47 | $349K |
| Nov 22, 2024 | Petras Michael B. Jr. | Chairman & CEO | Gift(G) | 39K | — | $0 |
| Nov 22, 2024 | Petras Michael B. Jr. | Chairman & CEO | Gift(G) | 39K | — | $0 |
| Nov 20, 2024 | Rutz Michael P | President of Sterigenics | Tax withholding(F) | 3K | $13.21 | $38K |
| Nov 20, 2024 | Petras Michael B. Jr. | Chairman & CEO | Tax withholding(F) | 29K | $13.21 | $386K |
| Sep 10, 2024 | Petras Michael B. Jr. | Chairman & CEO | Gift(G) | 200K | — | $0 |
| Sep 6, 2024 | GTCR Partners Xi/a&c LP | Director, 10% Owner | Sell(S) | 10.0M | $15.03 | $150.3M |
| Sep 6, 2024 | Bull Holdco L.P. | Director, 10% Owner | Sell(S) | 15.0M | $15.03 | $225.4M |
| Sep 6, 2024 | Warburg Pincus Private Equity XI-C, L.P. | Director, 10% Owner | Sell(S) | 15.0M | $15.03 | $225.4M |
| Aug 5, 2024 | Lyons Jonathan M. | Sr. Vice President, CFO | Tax withholding(F) | 8K | $14.22 | $109K |
| May 24, 2024 | Chen Ruoxi | Director | Grant(A) | 20K | — | $0 |
| May 24, 2024 | Cunningham Sean Laurence | Director | Grant(A) | 20K | — | $0 |
| May 24, 2024 | Donnini David | Director | Grant(A) | 20K | — | $0 |
| May 24, 2024 | Klee Ann R. | Director | Grant(A) | 20K | — | $0 |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Coverage: Form 4 filings indexed 2021-03-29 → 2026-07-14. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).