Seer, Inc. (SEER) ownership: Top institutional holder: SOFTBANK GROUP CORP. ($8.63M). Insider activity: Net Seller (0 buys, 9 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| SOFTBANK GROUP CORP. | 5135383.00 | $8.63M | 2026-03-31 |
| Siren, L.L.C. | 2458673.00 | $4.13M | 2026-03-31 |
| VANGUARD GROUP INC | 2187413.00 | $4.00M | 2025-12-31 |
| ACADIAN ASSET MANAGEMENT LLC | 2074709.00 | $3.48M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1958996.00 | $3.29M | 2026-03-31 |
| BlackRock, Inc. | 1821604.00 | $3.06M | 2026-03-31 |
| RENAISSANCE TECHNOLOGIES LLC | 976688.00 | $1.64M | 2026-03-31 |
| AJU IB Investment Co., Ltd. | 816375.00 | $1.54M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-02-18 | |
| Sell | null | 2026-02-18 | |
| Sell | null | 2026-02-03 | |
| Sell | null | 2026-02-03 | |
| Sell | null | 2026-02-03 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.