Seer, Inc.
A biotechnology company that helps scientists study the proteome—the full set of proteins in a body—using its Proteograph product suite, which relies on engineered nanoparticles that naturally gather proteins from blood samples. Founded in 2017 by researchers including Robert Langer, it grew out of nanoparticle work at Harvard's Brigham and Women's Hospital. The name "Seer" means one who sees, a nod to giving researchers a clearer view of proteins that were once hard to detect.
Bought 889.5K
Bought 790.0K
Sold 252.5K
Granted 2.41M · Bought 40.0K · Sold 2.18M
Sold 1.00M
Granted 112.1K
Granted 611.7K · Sold 177.4K
Granted 33.4K
Granted 112.1K · Bought 78.9K
Granted 411.8K · Sold 136.5K
Granted 91.6K
Granted 123.2K · Sold 12.7K
Granted 33.4K
Granted 178.7K · Sold 22.3K
Granted 107.5K
Granted 96.0K · Sold 1.5K
Bought 93.4K
Granted 87.6K
Granted 75.0K
Granted 64.0K
Granted 112.1K · Sold 42.4K
Granted 41.0K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Schindel Yair Chaim +1 co-filer10% owner · 5 transactions | — | 10.14Mas of Dec 2020 | — | 889.5K | — |
| Artal Group S.A. +8 co-filers10% owner · 2 transactions | — | 5.84Mas of Dec 2020 | — | 790.0K | — |
| Artal Group S.A. +8 co-filers10% owner · 1 transaction | — | 5.59Mas of Feb 2021 | — | — | 252.5K |
| Farokhzad OmidCEO AND CHAIR, Director · 37 transactions | — | 5.47M | 2.41M | 40.0K | 2.18M |
| Singer David BDirector, 10% owner · 2 transactions | — | 5.33Mas of Dec 2020 | — | — | — |
| Schindel Yair Chaim +1 co-filershareholder of 10% holder, 10% owner · 2 transactions | — | 4.92Mas of Jun 2021 | — | — | 1.00M |
| Langer RobertDirector · 6 transactions | — | 804.5Kas of Jul 2025 | 112.1K | — | — |
| Horn David R.PRESIDENT & CFO · 42 transactions | — | 494.0K | 611.7K | — | 177.4K |
| Ronaghi MostafaDirector · 2 transactions | — | 470.2Kas of Jun 2023 | 33.4K | — | — |
| McGuire TerranceDirector · 7 transactions | — | 406.1K | 112.1K | 78.9K | — |
| Ostadan OmeadPresident & COO, Director · 21 transactions | — | 378.2Kas of May 2022 | 411.8K | — | 136.5K |
| Hallal DavidDirector · 3 transactions | — | 355.1Kas of Jun 2024 | 91.6K | — | — |
| Kogan ElonaCHIEF LEGAL OFFICER · 2 transactions | — | 273.1Kas of Feb 2024 | 123.2K | — | 12.7K |
| Friedman CathyDirector · 2 transactions | — | 173.6Kas of Jun 2023 | 33.4K | — | — |
| Kogan Elona Esq.Chief Legal Officer · 6 transactions | — | 162.7Kas of Dec 2023 | 178.7K | — | 22.3K |
| Gulyani MeetaDirector · 4 transactions | — | 107.5Kas of Jul 2025 | 107.5K | — | — |
| Thomas Scott DChief Commercial Officer · 3 transactions | — | 95.5Kas of May 2023 | 96.0K | — | 1.5K |
| Ainslie Lee S III10% owner · 5 transactions | — | 93.4Kas of Dec 2020 | — | 93.4K | — |
| Haurwitz Rachel E.Director · 3 transactions | — | 87.6Kas of Jun 2024 | 87.6K | — | — |
| Bazarko Anthony R.Chief Commercial Officer · 1 transaction | — | 75.0K | 75.0K | — | — |
| Roelofs Nicolas H PHDDirector · 2 transactions | — | 75.0Kas of Jul 2025 | 64.0K | — | — |
| Nishar DipchandDirector · 6 transactions | — | 69.7Kas of Jul 2025 | 112.1K | — | 42.4K |
| Ro IsaacDirector · 1 transaction | — | 41.0K | 41.0K | — | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: -1.94M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.