SEER (Seer, Inc. Class A Common Stock)
Insider Trading Activity
Every open-market purchase and sale reported by SEER 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 |
|---|---|---|---|---|---|
| 2026-08-19 | David R. Horn | PRESIDENT & CFO | Sell | — | — |
| 2026-07-30 | Meeta Gulyani | Director | A | — | — |
| 2026-07-30 | Nicolas H PHD Roelofs | Director | A | — | — |
| 2026-07-30 | Dipchand Nishar | Director | A | — | — |
| 2026-07-30 | ROBERT LANGER | Director | A | — | — |
| 2026-07-30 | Isaac Ro | Director | A | — | — |
| 2026-07-30 | TERRANCE MCGUIRE | Director | A | — | — |
| 2026-07-10 | Dipchand Nishar | Director | Sell | — | — |
| 2026-05-21 | David R. Horn | PRESIDENT & CFO | Sell | — | — |
| 2026-05-11 | Anthony R. Bazarko | Chief Commercial Officer | A | — | — |
| 2026-02-19 | David R. Horn | PRESIDENT & CFO | Sell | — | — |
| 2026-02-19 | Omid Farokhzad | CEO AND CHAIR | Sell | — | — |
| 2026-02-05 | Omid Farokhzad | CEO AND CHAIR | A | — | — |
| 2026-02-05 | David R. Horn | PRESIDENT & CFO | A | — | — |
| 2025-12-11 | TERRANCE MCGUIRE | Director | C | — | — |
| 2025-12-11 | Omid Farokhzad | CEO AND CHAIR | C | — | — |
| 2025-11-21 | Omid Farokhzad | CEO AND CHAIR | Sell | — | — |
| 2025-11-21 | David R. Horn | PRESIDENT & CFO | Sell | — | — |
| 2025-09-03 | Isaac Ro | Director | A | — | — |
| 2025-08-21 | David R. Horn | PRESIDENT & CFO | Sell | — | — |
| 2025-08-21 | Omid Farokhzad | CEO AND CHAIR | Sell | — | — |
| 2025-07-09 | Nicolas H PHD Roelofs | Director | A | — | — |
| 2025-07-09 | Meeta Gulyani | Director | A | — | — |
| 2025-07-09 | ROBERT LANGER | Director | A | — | — |
| 2025-07-09 | TERRANCE MCGUIRE | Director | A | — | — |
| 2025-07-09 | Dipchand Nishar | Director | A | — | — |
| 2025-06-16 | Dipchand Nishar | Director | Sell | — | — |
| 2025-05-22 | David R. Horn | PRESIDENT & CFO | Sell | — | — |
| 2025-05-22 | Omid Farokhzad | CEO AND CHAIR | Sell | — | — |
| 2025-02-20 | David R. Horn | PRESIDENT & CFO | F | — | — |
| 2025-02-20 | Omid Farokhzad | CEO AND CHAIR | F | — | — |
| 2025-02-05 | David R. Horn | PRESIDENT & CFO | Sell | — | — |
| 2025-02-05 | Omid Farokhzad | CEO AND CHAIR | Sell | — | — |
| 2024-10-07 | Omid Farokhzad | CEO and Chair | MIXED | — | — |
| 2024-10-07 | David R. Horn | President & CFO | MIXED | — | — |
| 2024-08-15 | Nicolas H PHD Roelofs | Director | A | — | — |
| 2024-06-18 | Dipchand Nishar | Director | Sell | — | — |
| 2024-06-14 | Meeta Gulyani | Director | A | — | — |
| 2024-06-14 | Dipchand Nishar | Director | A | — | — |
| 2024-06-14 | ROBERT LANGER | Director | A | — | — |
| 2024-06-14 | TERRANCE MCGUIRE | Director | A | — | — |
| 2024-06-14 | Rachel E. Haurwitz | Director | A | — | — |
| 2024-06-14 | David Hallal | Director | A | — | — |
| 2024-03-12 | Omid Farokhzad | CEO AND CHAIR | Sell | — | — |
| 2024-02-23 | Elona Kogan | CHIEF LEGAL OFFICER | MIXED | — | — |
| 2024-02-23 | Omid Farokhzad | CEO AND CHAIR | A | — | — |
| 2024-02-23 | David R. Horn | PRESIDENT & CFO | MIXED | — | — |
| 2024-02-07 | David R. Horn | President and CFO | Sell | — | — |
| 2023-12-06 | Elona Esq. Kogan | Chief Legal Officer | Sell | — | — |
| 2023-11-03 | Omid Farokhzad | CEO, President and Chair | M | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 5,588,366 | — |
| — | CEO AND CHAIR | 5,466,202 | — |
| — | 10%+ Owner | 5,196,747 | — |
| — | 10%+ Owner | 5,050,911 | — |
| — | — | 4,923,196 | — |
| — | Director | 1,934,954 | — |
| — | Director | 821,025 | — |
| — | PRESIDENT & CFO | 486,650 | — |
| — | President & COO | 378,238 | — |
| — | Director | 355,128 | — |
| — | Director | 343,636 | — |
| — | Director | 301,625 | — |
| — | CHIEF LEGAL OFFICER | 273,142 | — |
| — | Director | 173,574 | — |
| — | Director | 124,043 | — |
| — | Chief Commercial Officer | 95,532 | — |
| — | Director | 91,496 | — |
| — | Director | 87,615 | — |
| — | Director | 75,544 | — |
| — | Chief Commercial Officer | 75,000 | — |
| — | Director | 53,375 | — |
| — | Director | 12,190 | — |
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 SEER quote page; the site-wide leaderboard is on the insider transactions hub.