As of May 30, 2026, Praxis Precision Medicines's top three insider holders are Capital Management, L.P. Adage (TenPercentOwner, 2.36Mn shares), Capital Management, L.P. Adage (TenPercentOwner, 2.06Mn shares), Marcio Souza (Chief Executive Officer, 76.89K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Jeffrey B Kindler | - | 1,166 | 0 | 10 Feb, 2026 |
| Dean J Mitchell | - | 17,251 | 0 | 25 Sep, 2025 |
| William D Young | - | 28,473 | 0 | 07 Jul, 2021 |
| Gregory Norden | - | 2,826 | 0 | 07 Jul, 2021 |
| Capital Management, L.P. Adage | - | 0 | 2,361,485 | 17 Oct, 2025 |
| Stuart A Arbuckle | - | 1,166 | 0 | 10 Feb, 2026 |
| Marcio Souza | Chief Executive Officer | 76,890 | 0 | 12 Jan, 2026 |
| Megan Sniecinski | Chief Operating Officer | 28,530 | 0 | 13 Jan, 2026 |
| Nicole Sweeny | Chief Commercial Officer | 38,619 | 0 | 13 Feb, 2023 |
| Lauren Mastrocola | Principal Accounting Officer | 13,446 | 0 | 13 Jan, 2026 |
| Alex Nemiroff | General Counsel And Secretary | 25,933 | 0 | 13 Jan, 2026 |
| Timothy Edwin Kelly | Chief Financial Officer | 31,046 | 0 | 13 Jan, 2026 |
| Jill Desimone | - | 14,500 | 0 | 10 Oct, 2023 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 06 Feb, 2026 | Jeffrey B Kindler | Common Stock | A | 688 | $0.00 | 688 | D | A |
| 06 Feb, 2026 | Stuart A Arbuckle | Common Stock | A | 688 | $0.00 | 688 | D | A |
| 06 Feb, 2026 | Jeffrey B Kindler | Common Stock | A | 478 | $0.00 | 1,166 | D | A |
| 06 Feb, 2026 | Stuart A Arbuckle | Common Stock | A | 478 | $0.00 | 1,166 | D | A |
| 06 Feb, 2026 | Stuart A Arbuckle | Stock Option (Right to Buy) | A | 224 | $0.00 | 224 | D | A |
| 06 Feb, 2026 | Jeffrey B Kindler | Stock Option (Right to Buy) | A | 224 | $0.00 | 224 | D | A |
| 12 Jan, 2026 | Megan Sniecinski | Common Stock | D | 885 | $275.74 | 28,530 | D | F |
| 12 Jan, 2026 | Timothy Edwin Kelly | Common Stock | D | 943 | $275.74 | 31,046 | D | F |
| 12 Jan, 2026 | Alex Nemiroff | Common Stock | D | 768 | $275.74 | 25,933 | D | F |
| 12 Jan, 2026 | Megan Sniecinski | Common Stock | D | 885 | $275.74 | 28,530 | D | F |
| 12 Jan, 2026 | Lauren Mastrocola | Common Stock | D | 344 | $275.74 | 13,446 | D | F |
| 08 Jan, 2026 | Alex Nemiroff | Common Stock | A | 6,875 | $0.00 | 27,618 | D | A |
| 08 Jan, 2026 | Megan Sniecinski | Common Stock | A | 9,625 | $0.00 | 30,502 | D | A |
| 08 Jan, 2026 | Megan Sniecinski | Common Stock | A | 9,625 | $0.00 | 30,502 | D | A |
| 08 Jan, 2026 | Marcio Souza | Common Stock | A | 27,640 | $0.00 | 81,142 | D | A |
| 08 Jan, 2026 | Timothy Edwin Kelly | Common Stock | A | 8,800 | $0.00 | 33,324 | D | A |
| 08 Jan, 2026 | Marcio Souza | Common Stock | A | 27,640 | $0.00 | 81,142 | D | A |
| 08 Jan, 2026 | Lauren Mastrocola | Common Stock | A | 3,750 | $0.00 | 14,157 | D | A |
| 10 Jan, 2026 | Marcio Souza | Common Stock | D | 4,252 | $288.45 | 76,890 | D | F |
| 10 Jan, 2026 | Megan Sniecinski | Common Stock | D | 1,087 | $288.45 | 29,415 | D | F |