Alector, Inc.
ALEC- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001653087
In the last 90 days, Alector, Inc. insiders filed 0 open-market purchases and 3 sales; 140 institutions reported holding it in 13F filings for Q2 2026, worth $192.7M in total; no superinvestor holds it.
13F holders, Q2 2025
Institutional positions in Alector, Inc. as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 136
- −5 vs. Q1 2025
- Shares held
- 70.5M
- −2.11M (−2.9%) vs. Q1 2025
- Total value
- $98.7M
- +$9.57M (+10.7%) vs. Q1 2025
- New holders
- 17
- 47 more added
- Sold out
- 22
- 37 more reduced
Compare with Q1 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ALEC on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 140 | $192.7M |
| Q1 2026 | 138 | $190.0M |
| Q4 2025 | 131 | $132.3M |
| Q3 2025 | 149 | $221.6M |
| Q2 2025 | 136 | $99.2M |
| Q1 2025 | 141 | $89.8M |
| Q4 2024 | 150 | $138.8M |
| Q3 2024 | 159 | $351.1M |
| Q2 2024 | 160 | $337.9M |
| Q1 2024 | 157 | $496.8M |
| Q4 2023 | 148 | $562.1M |
| Q3 2023 | 149 | $411.0M |
| Q2 2023 | 145 | $354.5M |
| Q1 2023 | 149 | $400.9M |
| Q4 2022 | 155 | $506.0M |
| Q3 2022 | 168 | $517.1M |
| Q2 2022 | 154 | $546.8M |
| Q1 2022 | 166 | $789.9M |
| Q4 2021 | 167 | $1.14B |
| Q3 2021 | 145 | $1.19B |
| Q2 2021 | 138 | $1.02B |
| Q1 2021 | 127 | $931.7M |
Institutions, Q2 2025
Shares, value and share of portfolio for each institution holding Alector, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 14,998,889 | $21.0M | 0.00% | +608,650+4.2% | Added |
| BlackRock, Inc. | 7,973,580 | $11.2M | 0.00% | −306,122−3.7% | Reduced |
| Vanguard Group Inc | 5,987,704 | $8.38M | 0.00% | −65,337−1.1% | Reduced |
| Price T Rowe Associates Inc | 4,875,264 | $6.83M | 0.00% | +4,198,951+620.9% | Added |
| Merck & Co., Inc. | 3,545,719 | $4.96M | 2.30% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 2,170,388 | $3.03M | 0.01% | +729,727+50.7% | Added |
| Eversept Partners, LP | 1,986,072 | $2.78M | 0.28% | +1,368,654+221.7% | Added |
| Geode Capital Management, LLC | 1,982,068 | $2.78M | 0.00% | +19,970+1.0% | Added |
| ADAR1 Capital Management, LLC | 1,723,526 | $2.41M | 0.39% | +1,343,196+353.2% | Added |
| State Street Corp | 1,709,902 | $2.39M | 0.00% | +69,640+4.2% | Added |
| Jacobs Levy Equity Management, Inc | 1,322,882 | $1.85M | 0.01% | −11,150−0.8% | Reduced |
| Euclidean Capital LLC | 1,307,858 | $1.83M | 0.60% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 1,254,850 | $1.76M | 0.00% | +220,995+21.4% | Added |
| Deerfield Management Company, L.P. (Series C) | 1,055,192 | $1.48M | 0.03% | 00.0% | Unchanged |
| 5AM Venture Management, LLC | 995,841 | $1.39M | 0.54% | 00.0% | Unchanged |
| Deutsche Bank AG | 989,747 | $1.39M | 0.00% | −111,800−10.1% | Reduced |
| Vestal Point Capital, LP | 976,992 | $1.37M | 0.07% | +472,452+93.6% | Added |
| DAFNA Capital Management LLC | 912,928 | $1.28M | 0.35% | 00.0% | Unchanged |
| Ikarian Capital, LLC | 900,000 | $1.26M | 0.42% | −50,000−5.3% | Reduced |
| Sio Capital Management, LLC | 845,531 | $1.18M | 0.48% | +8,372+1.0% | Added |
| Northern Trust Corp | 658,161 | $921.4K | 0.00% | −39,068−5.6% | Reduced |
| TD Asset Management Inc | 651,738 | $912.4K | 0.00% | +540,000+483.3% | Added |
| Charles Schwab Investment Management Inc | 647,653 | $906.7K | 0.00% | +22,923+3.7% | Added |
| Morgan Stanley | 606,552 | $849.2K | 0.00% | +259,845+74.9% | Added |
| Citadel Advisors LLC | 551,820 | $772.5K | 0.00% | +546,382+10,047.5% | Added |
| D. E. Shaw & Co., Inc. | 534,200 | $747.9K | 0.00% | +64,899+13.8% | Added |
| Panagora Asset Management Inc | 516,680 | $723.4K | 0.00% | +150,135+41.0% | Added |
| Boothbay Fund Management, LLC | 458,863 | $642.4K | 0.02% | +184,503+67.2% | Added |
| Millennium Management LLC | 410,803 | $575.1K | 0.00% | +145,987+55.1% | Added |
| AQR Capital Management LLC | 406,618 | $569.3K | 0.00% | −85,974−17.5% | Reduced |
| Dimensional Fund Advisors LP | 383,331 | $536.9K | 0.00% | −106,003−21.7% | Reduced |
| Two Sigma Advisers, LP | 377,000 | $527.8K | 0.00% | −15,900−4.0% | Reduced |
| Goldman Sachs Group Inc | 374,477 | $524.3K | 0.00% | +62,332+20.0% | Added |
| Royal Bank of Canada | 367,188 | $513.0K | 0.00% | +362,395+7,560.9% | Added |
| Bank of America Corp | 343,909 | $481.5K | 0.00% | +5,927+1.8% | Added |
| New Leaf Venture Partners, L.L.C. | 339,569 | $475.4K | 1.44% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 313,578 | $439.0K | 0.00% | +189,686+153.1% | Added |
| Mackenzie Financial Corp | 274,442 | $384.2K | 0.00% | +274,442 | New |
| Bank of New York Mellon Corp | 268,872 | $376.4K | 0.00% | +19,378+7.8% | Added |
| Walleye Capital LLC | 266,204 | $372.7K | 0.00% | −39,397−12.9% | Reduced |
| Diadema Partners LP | 266,023 | $372.4K | 0.23% | −190,523−41.7% | Reduced |
| State of Wyoming | 223,092 | $312.3K | 0.04% | +26,278+13.4% | Added |
| Two Sigma Investments, LP | 222,139 | $311.0K | 0.00% | +7,714+3.6% | Added |
| Susquehanna International Group, LLP | 203,798 | $285.3K | 0.00% | −49,321−19.5% | Reduced |
| Alphabet Inc. | 175,866 | $246.2K | 0.01% | 00.0% | Unchanged |
| Invesco Ltd. | 175,801 | $246.1K | 0.00% | +27,225+18.3% | Added |
| Barclays PLC | 169,795 | $237.7K | 0.00% | +44,709+35.7% | Added |
| Medici Capital LLC | 167,191 | $234.1K | 0.27% | 00.0% | Unchanged |
| Nuveen, LLC | 155,613 | $217.9K | 0.00% | +17,433+12.6% | Added |
| Los Angeles Capital Management LLC | 151,896 | $212.7K | 0.00% | +7,600+5.3% | Added |
| Gsa Capital Partners LLP | 150,669 | $211.0K | 0.01% | +150,669 | New |
| Rhumbline Advisers | 126,568 | $177.2K | 0.00% | +9,933+8.5% | Added |
| Bridgeway Capital Management, LLC | 115,000 | $161.0K | 0.00% | +115,000 | New |
| STRS Ohio | 110,400 | $154.6K | 0.00% | +7,800+7.6% | Added |
| DekaBank Deutsche Girozentrale | 100,000 | $148.0K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 100,366 | $144.3K | 0.00% | +46,945+87.9% | Added |
| Alliancebernstein L.P. | 92,940 | $130.1K | 0.00% | +10,840+13.2% | Added |
| XTX Topco Ltd | 73,338 | $102.7K | 0.00% | +40,767+125.2% | Added |
| Susquehanna Fundamental Investments, LLC | 70,778 | $99.1K | 0.00% | −67,126−48.7% | Reduced |
| Spears Abacus Advisors LLC | 61,513 | $86.1K | 0.00% | −100−0.2% | Reduced |
| Persistent Asset Partners Ltd | 61,096 | $85.5K | 0.07% | −43,831−41.8% | Reduced |
| Ieq Capital, LLC | 58,998 | $82.6K | 0.00% | −21,408−26.6% | Reduced |
| Velan Capital Investment Management LP | 55,000 | $77.0K | 0.08% | 00.0% | Unchanged |
| HSBC Holdings PLC | 51,700 | $73.9K | 0.00% | −6,372−11.0% | Reduced |
| Bank of Montreal | 52,380 | $73.3K | 0.00% | +52,380 | New |
| JustInvest LLC | 52,095 | $72.9K | 0.00% | +17,170+49.2% | Added |
| Utah Retirement Systems | 51,430 | $72.0K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 50,601 | $70.8K | 0.00% | +11,166+28.3% | Added |
| Citigroup Inc | 49,461 | $69.2K | 0.00% | −13,295−21.2% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 46,286 | $64.8K | 0.00% | −28,362−38.0% | Reduced |
| JPMorgan Chase & Co | 45,491 | $63.7K | 0.00% | −1,440,658−96.9% | Reduced |
| Algert Global LLC | 44,460 | $62.2K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 41,893 | $58.6K | 0.00% | −41,153−49.6% | Reduced |
| Tudor Investment Corp Et Al | 40,795 | $57.1K | 0.00% | −10.0% | Reduced |
| Intech Investment Management LLC | 39,915 | $55.9K | 0.00% | −20,836−34.3% | Reduced |
| Vontobel Holding Ltd. | 38,000 | $53.2K | 0.00% | +8,000+26.7% | Added |
| Jasper Ridge Partners, L.P. | 30,632 | $42.9K | 0.00% | 00.0% | Unchanged |
| Blackstone Group Inc. | 25,715 | $36.0K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 25,897 | $36.0K | 0.00% | −7,746−23.0% | Reduced |
| State Board of Administration of Florida Retirement System | 25,570 | $35.8K | 0.00% | 00.0% | Unchanged |
| Apollon Wealth Management, LLC | 25,000 | $35.0K | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 24,621 | $34.5K | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 23,952 | $33.5K | 0.00% | −232,599−90.7% | Reduced |
| Cerity Partners LLC | 23,736 | $33.2K | 0.00% | −17,828−42.9% | Reduced |
| Cubist Systematic Strategies, LLC | 21,819 | $30.5K | 0.00% | +21,819 | New |
| Graham Capital Management, L.P. | 21,373 | $29.9K | 0.00% | −19,725−48.0% | Reduced |
| Prudential Financial Inc | 21,322 | $29.9K | 0.00% | +21,322 | New |
| Erste Asset Management GmbH | 19,000 | $28.1K | 0.00% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 20,083 | $28.1K | 0.00% | +208+1.0% | Added |
| ProShare Advisors LLC | 20,078 | $28.1K | 0.00% | −2,143−9.6% | Reduced |
| FNY Investment Advisers, LLC | 20,000 | $28.0K | 0.01% | +10,000+100.0% | Added |
| Police & Firemen's Retirement System of New Jersey | 17,004 | $23.8K | 0.00% | 00.0% | Unchanged |
| SEI Investments Co | 16,884 | $23.6K | 0.00% | 00.0% | Unchanged |
| DLK Investment Management, LLC | 15,500 | $21.7K | 0.01% | +4,000+34.8% | Added |
| Ameriprise Financial Inc | 14,135 | $19.8K | 0.00% | +3,449+32.3% | Added |
| Diversified Trust Co | 14,102 | $19.7K | 0.00% | 00.0% | Unchanged |
| Shell Asset Management Co | 13,887 | $19.0K | 0.00% | −6,740−32.7% | Reduced |
| Tower Research Capital LLC (TRC) | 13,399 | $18.8K | 0.00% | −9,271−40.9% | Reduced |
| US Bancorp | 12,427 | $17.4K | 0.00% | −1,227−9.0% | Reduced |
| BNP Paribas Arbitrage, SA | 11,634 | $16.3K | 0.00% | −145,675−92.6% | Reduced |