As of September 29, 2026, Certara's top three insider holders are William F Feehery (Chief Executive Officer, 2.36Mn shares), Mason P Slaine (Director, 660.32K shares), Michael Andrew Schemick (Chief Financial Officer, 522.89K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | William F Feehery | Chief Executive Officer | 2,360,769 | 0 | 2,360,769 | 38.8% | 12 Nov, 2025 |
| 2 | Mason P Slaine | Director | 660,322 | 0 | 660,322 | 10.9% | 16 Nov, 2022 |
| 3 | Michael Andrew Schemick | Chief Financial Officer | 522,895 | 0 | 522,895 | 8.6% | 03 Apr, 2023 |
| 4 | James E Iii Cashman | Director, Other | 484,197 | 0 | 484,197 | 8.0% | 15 May, 2026 |
| 5 | Justin Edge | Pres., Regulatory Access | 394,764 | 0 | 394,764 | 6.5% | 05 Apr, 2022 |
| 6 | Robert Aspbury | President, Predictive Tech | 332,442 | 0 | 332,442 | 5.5% | 03 Apr, 2026 |
| 7 | Jieun W. Choe | Chief Strategy Marketing | 248,577 | 0 | 248,577 | 4.1% | 05 Apr, 2022 |
| 8 | Matthew M Walsh | Director | 213,316 | 0 | 213,316 | 3.5% | 15 May, 2026 |
| 9 | Richard M. Traynor | Svp And General Counsel | 173,524 | 0 | 173,524 | 2.9% | 03 Apr, 2024 |
| 10 | Leif E Pedersen | President, Chief Commercal Off | 110,045 | 0 | 110,045 | 1.8% | 03 Apr, 2026 |
| 11 | John E Gallagher | Chief Financial Officer | 95,371 | 0 | 95,371 | 1.6% | 03 Apr, 2026 |
| 12 | Daniel Corcoran | Svp And General Counsel | 52,576 | 0 | 52,576 | 0.9% | 02 Jun, 2026 |
| 13 | Nancy Killefer | Director | 51,846 | 0 | 51,846 | 0.9% | 15 May, 2026 |
| 14 | Cynthia Collins | Director | 51,846 | 0 | 51,846 | 0.9% | 15 May, 2026 |
| 15 | Eran Broshy | Director, Other | 50,708 | 0 | 50,708 | 0.8% | 15 May, 2026 |
| 16 | Patrick F Smith | President, Drug Dev Solutions | 50,091 | 0 | 50,091 | 0.8% | 08 Oct, 2024 |
| 17 | Rosemary A Crane | Director | 45,672 | 0 | 45,672 | 0.8% | 15 May, 2026 |
| 18 | Stephen M. Mclean | Director | 42,000 | 0 | 42,000 | 0.7% | 23 Aug, 2022 |
| 19 | Jon Matthew Resnick | Chief Executive Officer | 35,389 | 0 | 35,389 | 0.6% | 13 May, 2026 |
| 20 | John V W Reynders | Chief Financial Officer | 26,466 | 0 | 26,466 | 0.4% | 15 May, 2026 |
| 21 | Nicolette D Sherman | Chief Human Resources Officer | 24,358 | 0 | 24,358 | 0.4% | 03 Apr, 2024 |
| 22 | Drayton Virkler | President, Reg Acces | 22,006 | 0 | 22,006 | 0.4% | 03 Apr, 2023 |
| 23 | Rona Anhalt | Chief Human Resources Officer | 16,789 | 0 | 16,789 | 0.3% | 02 Jun, 2026 |
| 24 | Adrian Mckemey | President, Drug Dev. Solutions | 8,207 | 0 | 8,207 | 0.1% | 03 Apr, 2026 |
| 25 | Arjun Bedi | Director | 5,547 | 0 | 5,547 | 0.1% | 15 May, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 01 Sep, 2026 | Faiz Mohammed | Interim Cfo | Acquired A | 63,532 | $0.00 | $0 | 63,532 | Direct |
| 01 Jun, 2026 | Daniel Corcoran | Svp And General Counsel | Acquired M | 7,941 | $0.00 | $0 | 29,260 | Direct |
| 01 Jun, 2026 | Rona Anhalt | Chief Human Resources Officer | Acquired M | 7,147 | $0.00 | $0 | 19,030 | Direct |
| 01 Jun, 2026 | Daniel Corcoran | Svp And General Counsel | Disposed F | 4,210 | $5.82 | $24.50K | 25,050 | Direct |
| 01 Jun, 2026 | Rona Anhalt | Chief Human Resources Officer | Disposed F | 2,241 | $5.82 | $13.04K | 16,789 | Direct |
| 01 Jun, 2026 | Rona Anhalt | Chief Human Resources Officer | Disposed M | 7,147 | $0.00 | $0 | 7,147 | Direct |
| 01 Jun, 2026 | Daniel Corcoran | Svp And General Counsel | Acquired M | 14,889 | $0.00 | $0 | 39,939 | Direct |
| 01 Jun, 2026 | Daniel Corcoran | Svp And General Counsel | Disposed F | 7,893 | $5.82 | $45.94K | 32,046 | Direct |
| 01 Jun, 2026 | Daniel Corcoran | Svp And General Counsel | Disposed M | 7,941 | $0.00 | $0 | 7,941 | Direct |
| 01 Jun, 2026 | Daniel Corcoran | Svp And General Counsel | Disposed M | 14,889 | $0.00 | $0 | 0 | Direct |
| 14 May, 2026 | James E Iii Cashman | Director, Other | Acquired M | 15,757 | $0.00 | $0 | 484,197 | Direct |
| 14 May, 2026 | Nancy Killefer | Director | Acquired M | 15,757 | $0.00 | $0 | 51,846 | Direct |
| 14 May, 2026 | Rosemary A Crane | Director | Acquired M | 15,757 | $0.00 | $0 | 45,672 | Direct |
| 14 May, 2026 | Cynthia Collins | Director | Acquired M | 15,757 | $0.00 | $0 | 51,846 | Direct |
| 14 May, 2026 | Eran Broshy | Director, Other | Acquired M | 15,757 | $0.00 | $0 | 50,708 | Direct |
| 14 May, 2026 | Arjun Bedi | Director | Acquired M | 5,547 | $0.00 | $0 | 5,547 | Direct |
| 14 May, 2026 | John V W Reynders | Chief Financial Officer | Acquired M | 15,757 | $0.00 | $0 | 26,466 | Direct |
| 14 May, 2026 | Matthew M Walsh | Director | Acquired M | 15,757 | $0.00 | $0 | 213,316 | Direct |
| 14 May, 2026 | Nancy Killefer | Director | Disposed M | 15,757 | $0.00 | $0 | 0 | Direct |
| 14 May, 2026 | Arjun Bedi | Director | Disposed M | 5,547 | $0.00 | $0 | 0 | Direct |