Alector Inc (ALEC)
Who owns Alector Inc (ALEC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 84.5% of the shares are freely tradable; institutional investors hold 82.3%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| TCG Crossover Management, LLC | 9.01 | 10,000,000 | +0.0 | 03/31/2026 |
| BlackRock Inc | 6.97 | 7,741,245 | +8.3 | 03/31/2026 |
| Vanguard Group Inc | 6.22 | 6,908,054 | +14.5 | 12/31/2025 |
| Acadian Asset Management LLC | 3.64 | 4,038,785 | +5,518.2 | 03/31/2026 |
| Foresite Capital Management IV, LLC | 3.50 | 3,887,200 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.31 | 3,678,722 | +0.0 | 03/31/2026 |
| Merck & Co Inc | 3.19 | 3,545,719 | +0.0 | 03/31/2026 |
| D. E. Shaw & Co LP | 3.00 | 3,332,835 | +40.9 | 03/31/2026 |
| 683 Capital Management LLC | 2.88 | 3,200,000 | -4.5 | 03/31/2026 |
| Balyasny Asset Management LLC | 2.64 | 2,935,253 | -10.1 | 03/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 9. Jul 2026 | Wong-Sarad Grace | Principal Accounting Officer | Other | 20,000 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.