Alector, Inc. (ALEC) ownership: Top institutional holder: TCG Crossover Management, LLC ($21.50M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| TCG Crossover Management, LLC | 10000000.00 | $21.50M | 2026-03-31 |
| BlackRock, Inc. | 7741245.00 | $16.64M | 2026-03-31 |
| VANGUARD GROUP INC | 6908054.00 | $10.78M | 2025-12-31 |
| ACADIAN ASSET MANAGEMENT LLC | 4038785.00 | $8.68M | 2026-03-31 |
| Foresite Capital Management IV, LLC | 3887200.00 | $8.36M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3678722.00 | $7.91M | 2026-03-31 |
| Merck & Co., Inc. | 3545719.00 | $7.62M | 2026-03-31 |
| D. E. Shaw & Co., Inc. | 3332835.00 | $7.17M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-17 | |
| Sell | null | 2026-06-17 | |
| Sell | null | 2026-06-17 | |
| Sell | null | 2026-06-17 | |
| Sell | null | 2026-06-17 | |
| Sell | null | 2026-06-17 | |
| Sell | null | 2026-06-17 | |
| Sell | null | 2026-06-17 |
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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.