According to recent filings covering the 90 days ending February 19, 2026, the three most significant insider holders at Ategrity Specialty Insurance Co Holdings are Director Stuart J. Zimmer (38.54Mn shares), Director Mitchell Brad Pressman (96.29K shares), Director Robert C Merton (47.06K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Stuart J. Zimmer | 38,538,541 | 01 Oct, 2025 | |
| Mitchell Brad Pressman | 96,287 | 16 Jun, 2025 | |
| Robert C Merton | 47,058 | 16 Jun, 2025 | |
| John Langton Jr. Sennott | 29,400 | 16 Jun, 2025 | |
| Neelam Patel | Chief Financial Officer | 20,000 | 23 Jul, 2025 |
| William S Mercer | 7,300 | 16 Jun, 2025 | |
| Justin G Cohen | Chief Executive Officer | 5,200 | 28 Oct, 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 |
|---|---|---|---|---|---|---|---|---|
| 27 Oct, 2025 | Justin G Cohen | Common Stock | A | 5,200 | $19.41 | 5,200 | D | P |
| 30 Sep, 2025 | Stuart J. Zimmer | Common Stock | A | 5,000 | $19.47 | 38,538,541 | I | P |
| 29 Sep, 2025 | Stuart J. Zimmer | Common Stock | A | 6,130 | $19.37 | 38,533,541 | I | P |
| 26 Sep, 2025 | Stuart J. Zimmer | Common Stock | A | 5,741 | $19.44 | 38,527,411 | I | P |
| 26 Sep, 2025 | Stuart J. Zimmer | - | - | 38,527,411 | I | |||
| 25 Sep, 2025 | Stuart J. Zimmer | Common Stock | A | 4,179 | $19.45 | 38,521,670 | I | P |
| 13 Aug, 2025 | Stuart J. Zimmer | Common Stock | A | 5,051 | $19.49 | 38,517,491 | I | P |
| 13 Aug, 2025 | Stuart J. Zimmer | - | - | 38,517,491 | I | |||
| 12 Jun, 2025 | Robert C Merton | Common Stock | A | 47,058 | $17.00 | 47,058 | D | P |
| 12 Jun, 2025 | John Langton Jr. Sennott | Common Stock | A | 29,400 | $17.00 | 29,400 | D | P |
| 12 Jun, 2025 | Neelam Patel | Common Stock | A | 20,000 | $17.00 | 20,000 | D | P |
| 12 Jun, 2025 | Neelam Patel | - | - | 20,000 | D | |||
| 12 Jun, 2025 | William S Mercer | Common Stock | A | 7,300 | $17.00 | 7,300 | D | P |
| 12 Jun, 2025 | Mitchell Brad Pressman | Common Stock | A | 2,500 | $17.00 | 96,287 | D | P |