PRAX (Praxis Precision Medicines, Inc. Common Stock)
Insider Trading Activity
Every open-market purchase and sale reported by PRAX officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-08 | Marcio Souza | Chief Executive Officer | G | — | — |
| 2026-06-26 | Jill DeSimone | Director | MIXED | — | — |
| 2026-06-12 | Merit Ester Cudkowicz | Director | A | — | — |
| 2026-06-12 | Stuart A Arbuckle | Director | A | — | — |
| 2026-06-12 | Gregory Norden | Director | A | — | — |
| 2026-06-12 | Jeffrey Chodakewitz | Director | A | — | — |
| 2026-06-12 | WILLIAM D YOUNG | Director | A | — | — |
| 2026-06-12 | JEFFREY B KINDLER | Director | A | — | — |
| 2026-06-12 | DEAN J MITCHELL | Director | A | — | — |
| 2026-06-12 | Jill DeSimone | Director | A | — | — |
| 2026-05-19 | Lauren Mastrocola | Principal Accounting Officer | A | — | — |
| 2026-05-19 | Megan Sniecinski | Chief Operating Officer | A | — | — |
| 2026-05-19 | Timothy Edwin Kelly | Chief Financial Officer | A | — | — |
| 2026-05-19 | Alex Nemiroff | General Counsel and Secretary | A | — | — |
| 2026-05-19 | Marcio Souza | Chief Executive Officer | A | — | — |
| 2026-02-10 | Stuart A Arbuckle | Director | A | — | — |
| 2026-02-10 | JEFFREY B KINDLER | Director | A | — | — |
| 2026-01-13 | Megan Sniecinski | Chief Operating Officer | F | — | — |
| 2026-01-13 | Alex Nemiroff | General Counsel and Secretary | F | — | — |
| 2026-01-13 | Lauren Mastrocola | Principal Accounting Officer | F | — | — |
| 2026-01-13 | Timothy Edwin Kelly | Chief Financial Officer | F | — | — |
| 2026-01-12 | Timothy Edwin Kelly | Chief Financial Officer | MIXED | — | — |
| 2026-01-12 | Marcio Souza | Chief Executive Officer | MIXED | — | — |
| 2026-01-12 | Alex Nemiroff | General Counsel and Secretary | MIXED | — | — |
| 2026-01-12 | Megan Sniecinski | Chief Operating Officer | MIXED | — | — |
| 2026-01-12 | Lauren Mastrocola | Principal Accounting Officer | MIXED | — | — |
| 2026-01-09 | Alex Nemiroff | General Counsel and Secretary | F | — | — |
| 2026-01-09 | Marcio Souza | Chief Executive Officer | F | — | — |
| 2026-01-09 | Lauren Mastrocola | Principal Accounting Officer | F | — | — |
| 2026-01-09 | Timothy Edwin Kelly | Chief Financial Officer | F | — | — |
| 2025-12-31 | Marcio Souza | Chief Executive Officer | G | — | — |
| 2025-11-21 | Timothy Edwin Kelly | Chief Financial Officer | A | — | — |
| 2025-11-21 | Alex Nemiroff | General Counsel and Secretary | MIXED | — | — |
| 2025-11-21 | Lauren Mastrocola | Principal Accounting Officer | MIXED | — | — |
| 2025-10-17 | Adage Capital Management, L.P. | 10%+ Owner | Sell | — | — |
| 2025-09-25 | DEAN J MITCHELL | Director | M | — | — |
| 2025-06-27 | Jeffrey Chodakewitz | Director | A | — | — |
| 2025-06-27 | Jill DeSimone | Director | A | — | — |
| 2025-06-27 | Merit Ester Cudkowicz | Director | A | — | — |
| 2025-06-27 | Gregory Norden | Director | A | — | — |
| 2025-06-27 | DEAN J MITCHELL | Director | A | — | — |
| 2025-06-27 | WILLIAM D YOUNG | Director | A | — | — |
| 2025-05-19 | Timothy Edwin Kelly | Chief Financial Officer | A | — | — |
| 2025-05-19 | Marcio Souza | Chief Executive Officer | A | — | — |
| 2025-02-14 | Lauren Mastrocola | Principal Accounting Officer | F | — | — |
| 2025-02-14 | Marcio Souza | Chief Executive Officer | F | — | — |
| 2025-02-14 | Alex Nemiroff | General Counsel and Secretary | F | — | — |
| 2025-01-14 | Lauren Mastrocola | Principal Accounting Officer | MIXED | — | — |
| 2025-01-14 | Marcio Souza | Chief Executive Officer | A | — | — |
| 2025-01-14 | Timothy Edwin Kelly | Chief Financial Officer | MIXED | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 2,359,116 | — |
| — | 10%+ Owner | 326,274 | — |
| — | 10%+ Owner | 326,274 | — |
| — | 10%+ Owner | 326,274 | — |
| — | Director | 179,289 | — |
| — | 10%+ Owner | 162,805 | — |
| — | 10%+ Owner | 60,492 | — |
| — | 10%+ Owner | 60,492 | — |
| — | Chief Executive Officer | 56,495 | — |
| — | 10%+ Owner | 53,263 | — |
| — | Chief Financial Officer | 31,167 | — |
| — | 10%+ Owner | 29,770 | — |
| — | Chief Operating Officer | 28,664 | — |
| — | General Counsel and Secretary | 26,010 | — |
| — | Director | 18,622 | — |
| — | Principal Accounting Officer | 13,572 | — |
| — | Chief Medical Officer | 6,632 | — |
| — | Director | 4,957 | — |
| — | Director | 3,269 | — |
| — | Chief Commercial Officer | 2,575 | — |
| — | Director | 2,537 | — |
| — | Director | 2,537 | — |
| — | Director | 1,559 | — |
| — | Director | 1,371 | — |
| — | Director | 1,371 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the PRAX quote page; the site-wide leaderboard is on the insider transactions hub.