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 2026
Institutional positions in Alector, Inc. as of Jun 30, 2026. 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
- 140
- +4 vs. Q1 2026
- Shares held
- 95.9M
- +7.48M (+8.5%) vs. Q1 2026
- Total value
- $192.7M
- +$2.73M (+1.4%) vs. Q1 2026
- New holders
- 13
- 59 more added
- Sold out
- 9
- 35 more reduced
2 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Alector, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| TCG Crossover Management, LLC | 10,000,000 | $20.1M | 0.48% | 00.0% | Unchanged |
| Nantahala Capital Management, LLC | 8,636,218 | $17.4M | 0.53% | +5,820,235+206.7% | Added |
| BlackRock, Inc. | 7,847,879 | $15.8M | 0.00% | +106,634+1.4% | Added |
| Acadian Asset Management LLC | 4,414,345 | $8.86M | 0.01% | +375,560+9.3% | Added |
| Vanguard Capital Management LLC | 4,009,340 | $8.06M | 0.00% | +330,618+9.0% | Added |
| Kynam Capital Management, LP | 3,808,494 | $7.66M | 0.42% | +1,808,494+90.4% | Added |
| Merck & Co., Inc. | 3,545,719 | $7.13M | 1.35% | 00.0% | Unchanged |
| Balyasny Asset Management LLC | 3,247,426 | $6.53M | 0.01% | +312,173+10.6% | Added |
| 683 Capital Management, LLC | 3,200,000 | $6.43M | 0.59% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 2,959,983 | $5.95M | 0.00% | −372,852−11.2% | Reduced |
| ADAR1 Capital Management, LLC | 2,883,583 | $5.80M | 0.27% | +1,833,583+174.6% | Added |
| Vanguard Portfolio Management LLC | 2,820,493 | $5.67M | 0.00% | +236,951+9.2% | Added |
| Geode Capital Management, LLC | 2,454,271 | $4.93M | 0.00% | +168,053+7.4% | Added |
| Spruce Street Capital LP | 2,101,068 | $4.22M | 0.83% | 00.0% | Unchanged |
| Millennium Management LLC | 1,988,835 | $4.00M | 0.00% | +9,609+0.5% | Added |
| Ikarian Capital, LLC | 1,982,606 | $3.99M | 0.65% | −100,000−4.8% | Reduced |
| State Street Corp | 1,879,765 | $3.78M | 0.00% | +14,239+0.8% | Added |
| Jacobs Levy Equity Management, Inc | 1,765,929 | $3.55M | 0.01% | −388,432−18.0% | Reduced |
| Medici Capital LLC | 1,652,520 | $3.32M | 6.51% | 00.0% | Unchanged |
| Affinity Asset Advisors, LLC | 1,510,000 | $3.04M | 0.15% | +1,010,000+202.0% | Added |
| Eversept Partners, LP | 1,423,873 | $2.86M | 0.16% | +72,767+5.4% | Added |
| FMR LLC | 1,396,398 | $2.81M | 0.00% | −399,706−22.3% | Reduced |
| AQR Capital Management LLC | 1,309,577 | $2.63M | 0.00% | +598,243+84.1% | Added |
| Euclidean Capital LLC | 1,307,858 | $2.63M | 0.60% | 00.0% | Unchanged |
| Mackenzie Financial Corp | 1,109,770 | $2.23M | 0.00% | +252,416+29.4% | Added |
| Deutsche Bank AG | 1,098,388 | $2.21M | 0.00% | +5,485+0.5% | Added |
| Deerfield Management Company, L.P. (Series C) | 1,055,192 | $2.12M | 0.02% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 1,045,376 | $2.10M | 0.00% | −233,930−18.3% | Reduced |
| Renaissance Technologies LLC | 935,166 | $1.88M | 0.00% | −352,525−27.4% | Reduced |
| DAFNA Capital Management LLC | 908,351 | $1.83M | 0.35% | 00.0% | Unchanged |
| Elmind Capital, LP | 900,000 | $1.81M | 0.45% | 00.0% | Unchanged |
| Panagora Asset Management Inc | 845,999 | $1.70M | 0.01% | +255,611+43.3% | Added |
| Charles Schwab Investment Management Inc | 818,831 | $1.65M | 0.00% | +31,423+4.0% | Added |
| Northern Trust Corp | 773,462 | $1.55M | 0.00% | +81,206+11.7% | Added |
| Vanguard Fiduciary Trust Co | 663,592 | $1.33M | 0.00% | +85,653+14.8% | Added |
| Marshall Wace, LLP | 598,559 | $1.20M | 0.00% | −21,865−3.5% | Reduced |
| Cantor Fitzgerald, L. P. | 590,984 | $1.19M | 0.01% | +590,984 | New |
| Boothbay Fund Management, LLC | 532,850 | $1.07M | 0.02% | −26,876−4.8% | Reduced |
| Goldman Sachs Group Inc | 433,875 | $872.1K | 0.00% | −170,687−28.2% | Reduced |
| XTX Topco Ltd | 399,681 | $803.4K | 0.01% | −160,215−28.6% | Reduced |
| Citadel Advisors LLC | 391,232 | $786.4K | 0.00% | +313,687+404.5% | Added |
| UBS Group AG | 273,780 | $550.3K | 0.00% | +128,436+88.4% | Added |
| Invesco Ltd. | 257,139 | $516.8K | 0.00% | −7,928−3.0% | Reduced |
| Bank of New York Mellon Corp | 250,093 | $502.7K | 0.00% | −2,204−0.9% | Reduced |
| Ameriprise Financial Inc | 224,530 | $451.3K | 0.00% | −46,742−17.2% | Reduced |
| Nano Cap New Millennium Growth Fund L P | 200,000 | $402.0K | 0.31% | 00.0% | Unchanged |
| LMR Partners LLP | 200,000 | $402.0K | 0.00% | +200,000 | New |
| Nuveen, LLC | 176,234 | $354.2K | 0.00% | +21,304+13.8% | Added |
| Utah Retirement Systems | 154,290 | $310.1K | 0.00% | 00.0% | Unchanged |
| Bank of America Corp | 142,678 | $286.8K | 0.00% | −238,230−62.5% | Reduced |
| Bridgeway Capital Management, LLC | 142,500 | $286.4K | 0.01% | 00.0% | Unchanged |
| Canada Pension Plan Investment Board | 131,300 | $263.9K | 0.00% | −51,900−28.3% | Reduced |
| Morgan Stanley | 120,480 | $242.2K | 0.00% | −244,087−67.0% | Reduced |
| Public Employees Retirement System of Ohio | 119,769 | $240.7K | 0.00% | −16,231−11.9% | Reduced |
| Alliancebernstein L.P. | 108,940 | $234.2K | 0.00% | +16,000+17.2% | Added |
| Rhumbline Advisers | 109,532 | $220.1K | 0.00% | +8,205+8.1% | Added |
| STRS Ohio | 101,600 | $204.2K | 0.00% | +15,100+17.5% | Added |
| Russell Investments Group, Ltd. | 98,496 | $198.0K | 0.00% | +32,365+48.9% | Added |
| Wells Fargo & Company | 89,172 | $179.2K | 0.00% | +54,646+158.3% | Added |
| Simplex Trading, LLC | 85,488 | $171.8K | 0.00% | +17,011+24.8% | Added |
| Price T Rowe Associates Inc | 81,655 | $165.0K | 0.00% | +25,555+45.6% | Added |
| Blackstone Group Inc. | 77,145 | $155.1K | 0.00% | 00.0% | Unchanged |
| Jasper Ridge Partners, L.P. | 73,531 | $147.8K | 0.00% | 00.0% | Unchanged |
| SEI Investments Co | 71,151 | $143.0K | 0.00% | +17,305+32.1% | Added |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 69,666 | $140.0K | 0.00% | 00.0% | Unchanged |
| Ieq Capital, LLC | 60,570 | $121.7K | 0.00% | +13,490+28.7% | Added |
| Verdad Advisers, LP | 60,509 | $121.6K | 0.12% | +36,955+156.9% | Added |
| MetLife Investment Management | 58,696 | $118.0K | 0.00% | +22,488+62.1% | Added |
| Mariner, LLC | 52,709 | $106.0K | 0.00% | +33,910+180.4% | Added |
| JustInvest LLC | 49,445 | $99.4K | 0.00% | −1,184−2.3% | Reduced |
| HSBC Holdings PLC | 48,523 | $98.0K | 0.00% | 00.0% | Unchanged |
| Graham Capital Management, L.P. | 46,496 | $93.5K | 0.00% | +46,496 | New |
| Citigroup Inc | 46,275 | $93.0K | 0.00% | +41,636+897.5% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 45,190 | $90.8K | 0.00% | +2,529+5.9% | Added |
| Barclays PLC | 44,957 | $90.4K | 0.00% | +2,366+5.6% | Added |
| JPMorgan Chase & Co | 42,998 | $89.4K | 0.00% | +5,619+15.0% | Added |
| Diversified Trust Co | 42,351 | $85.1K | 0.00% | +16,456+63.5% | Added |
| Dimensional Fund Advisors LP | 33,728 | $68.0K | 0.00% | −250,089−88.1% | Reduced |
| Cerity Partners LLC | 32,521 | $65.4K | 0.00% | +5,545+20.6% | Added |
| Vanguard Global Advisers, LLC | 31,302 | $62.9K | 0.00% | 00.0% | Unchanged |
| Spears Abacus Advisors LLC | 30,342 | $61.0K | 0.00% | −24,300−44.5% | Reduced |
| Vontobel Holding Ltd. | 30,000 | $60.3K | 0.00% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 26,699 | $53.7K | 0.00% | −53,392−66.7% | Reduced |
| Royal Bank of Canada | 26,122 | $53.0K | 0.00% | +19,075+270.7% | Added |
| Mercer Global Advisors Inc | 25,504 | $51.3K | 0.00% | +25,504 | New |
| Group One Trading, L.P. | 25,208 | $50.7K | 0.00% | +25,208 | New |
| Intech Investment Management LLC | 24,530 | $49.3K | 0.00% | +576+2.4% | Added |
| Wealth Enhancement Advisory Services, LLC | 30,251 | $48.7K | 0.00% | +12,054+66.2% | Added |
| Susquehanna International Group, LLP | 24,123 | $48.5K | 0.00% | −83,474−77.6% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 23,426 | $47.1K | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 21,898 | $44.0K | 0.00% | +6,420+41.5% | Added |
| BNP Paribas Arbitrage, SA | 21,200 | $42.6K | 0.00% | +1,173+5.9% | Added |
| Manufacturers Life Insurance Company, The | 19,397 | $39.0K | 0.00% | −6,751−25.8% | Reduced |
| Qube Research & Technologies Ltd | 16,569 | $33.3K | 0.00% | +16,569 | New |
| Captrust Financial Advisors | 16,037 | $32.2K | 0.00% | +5,389+50.6% | Added |
| Prudential Financial Inc | 16,015 | $32.2K | 0.00% | −7,780−32.7% | Reduced |
| Creative Planning | 15,015 | $30.2K | 0.00% | +15,015 | New |
| Tower Research Capital LLC (TRC) | 14,450 | $29.0K | 0.00% | +8,507+143.1% | Added |
| Hamilton Lane Advisors LLC | 14,400 | $28.9K | 0.02% | 00.0% | Unchanged |
| Quadrature Capital Ltd | 14,169 | $28.5K | 0.00% | −5,317−27.3% | Reduced |