SEER · Insider Trading
Seer, Inc. Class A Common Stock
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-19 | David R. Horn | PRESIDENT & CFO | Sell | −7,309 | −$14.81K |
| 2026-07-30 | Meeta Gulyani | Director | A | +16,500 | — |
| 2026-07-30 | Nicolas H PHD Roelofs | Director | A | +16,500 | — |
| 2026-07-30 | Dipchand Nishar | Director | A | +16,500 | — |
| 2026-07-30 | Robert Langer | Director | A | +16,500 | — |
| 2026-07-30 | Isaac Ro | Director | A | +12,375 | — |
| 2026-07-30 | Terrance McGuire | Director | A | +16,500 | — |
| 2026-07-10 | Dipchand Nishar | Director | Sell | −10,660 | −$23.27K |
| 2026-05-21 | David R. Horn | PRESIDENT & CFO | Sell | −7,303 | −$12.35K |
| 2026-05-11 | Anthony R. Bazarko | Chief Commercial Officer | A | +75,000 | — |
| 2026-02-19 | David R. Horn | PRESIDENT & CFO | Sell | −7,743 | −$15.45K |
| 2026-02-19 | Omid Farokhzad | CEO AND CHAIR | Sell | −24,385 | −$48.65K |
| 2026-02-05 | Omid Farokhzad | CEO AND CHAIR | A | +697,162 | — |
| 2026-02-05 | David R. Horn | PRESIDENT & CFO | A | +79,000 | — |
| 2025-12-11 | Terrance McGuire | Director | C | +4,088 | — |
| 2025-12-11 | Omid Farokhzad | CEO AND CHAIR | C | +3,555,195 | — |
| 2025-11-21 | Omid Farokhzad | CEO AND CHAIR | Sell | −33,838 | −$66.71K |
| 2025-11-21 | David R. Horn | PRESIDENT & CFO | Sell | −6,797 | −$13.40K |
| 2025-09-03 | Isaac Ro | Director | A | +41,000 | — |
| 2025-08-21 | David R. Horn | PRESIDENT & CFO | Sell | −6,827 | −$13.96K |
| 2025-08-21 | Omid Farokhzad | CEO AND CHAIR | Sell | −33,992 | −$69.48K |
| 2025-07-09 | Nicolas H PHD Roelofs | Director | A | +17,083 | — |
| 2025-07-09 | Meeta Gulyani | Director | A | +20,500 | — |
| 2025-07-09 | Robert Langer | Director | A | +20,500 | — |
| 2025-07-09 | Terrance McGuire | Director | A | +20,500 | — |
| 2025-07-09 | Dipchand Nishar | Director | A | +20,500 | — |
| 2025-06-16 | Dipchand Nishar | Director | Sell | −30,253 | −$62.94K |
| 2025-05-22 | David R. Horn | PRESIDENT & CFO | Sell | −6,760 | −$14.03K |
| 2025-05-22 | Omid Farokhzad | CEO AND CHAIR | Sell | −33,663 | −$69.85K |
| 2025-02-20 | David R. Horn | PRESIDENT & CFO | F | −26,572 | −$61.12K |
| 2025-02-20 | Omid Farokhzad | CEO AND CHAIR | F | −88,494 | −$203.54K |
| 2025-02-05 | David R. Horn | PRESIDENT & CFO | Sell | −3,550 | −$7.94K |
| 2025-02-05 | Omid Farokhzad | CEO AND CHAIR | Sell | −8,068 | −$18.04K |
| 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 | +46,886 | — |
| 2024-06-18 | Dipchand Nishar | Director | Sell | −12,109 | −$21.51K |
| 2024-06-14 | Meeta Gulyani | Director | A | +58,178 | — |
| 2024-06-14 | Dipchand Nishar | Director | A | +58,178 | — |
| 2024-06-14 | Robert Langer | Director | A | +58,178 | — |
| 2024-06-14 | Terrance McGuire | Director | A | +58,178 | — |
| 2024-06-14 | Rachel E. Haurwitz | Director | A | +58,178 | — |
| 2024-06-14 | David Hallal | Director | A | +58,178 | — |
| 2024-03-12 | Omid Farokhzad | CEO AND CHAIR | Sell | −52,857 | −$107.42K |
| 2024-02-23 | Elona Kogan | CHIEF LEGAL OFFICER | MIXED | +110,469 | −$20.02K |
| 2024-02-23 | Omid Farokhzad | CEO AND CHAIR | A | +529,634 | — |
| 2024-02-23 | David R. Horn | PRESIDENT & CFO | MIXED | +152,354 | −$20.02K |
| 2024-02-07 | David R. Horn | President and CFO | Sell | −3,608 | −$6.01K |
| 2023-12-06 | Elona Esq. Kogan | Chief Legal Officer | Sell | −8,182 | −$13.87K |
| 2023-11-03 | Omid Farokhzad | CEO, President and Chair | M | +151,764 | +$6.07K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Omid Farokhzad | CEO AND CHAIR | 5,466,202 | $10.55M |
| Robert Langer | Director | 821,025 | $1.58M |
| David R. Horn | PRESIDENT & CFO | 486,650 | $939.23K |
| Terrance McGuire | Director | 343,636 | $663.22K |
| Meeta Gulyani | Director | 124,043 | $239.40K |
| Nicolas H PHD Roelofs | Director | 91,496 | $176.59K |
| Dipchand Nishar | Director | 75,544 | $145.80K |
| Anthony R. Bazarko | Chief Commercial Officer | 75,000 | $144.75K |
| Isaac Ro | Director | 53,375 | $103.01K |
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.
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.