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 $183.4M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Alector, Inc. as of Mar 31, 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
- 138
- +9 vs. Q4 2025
- Shares held
- 88.4M
- +10.9M (+14.0%) vs. Q4 2025
- Total value
- $190.0M
- +$69.2M (+57.3%) vs. Q4 2025
- New holders
- 29
- 44 more added
- Sold out
- 20
- 36 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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 | $183.4M |
| Q1 2026 | 138 | $190.0M |
| Q4 2025 | 131 | $131.5M |
| Q3 2025 | 149 | $221.2M |
| Q2 2025 | 136 | $98.7M |
| Q1 2025 | 141 | $89.1M |
| Q4 2024 | 150 | $138.8M |
| Q3 2024 | 159 | $338.4M |
| Q2 2024 | 160 | $330.4M |
| Q1 2024 | 157 | $446.6M |
| Q4 2023 | 148 | $510.1M |
| Q3 2023 | 149 | $402.6M |
| Q2 2023 | 145 | $354.5M |
| Q1 2023 | 149 | $360.9M |
| Q4 2022 | 155 | $506.0M |
| Q3 2022 | 168 | $516.1M |
| Q2 2022 | 154 | $546.8M |
| Q1 2022 | 166 | $789.8M |
| Q4 2021 | 167 | $1.13B |
| Q3 2021 | 145 | $1.19B |
| Q2 2021 | 138 | $1.02B |
| Q1 2021 | 127 | $931.7M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Alector, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Caitong International Asset Management Co., Ltd | 2 | $4 | 0.00% | +2 | New |
| IFP Advisors, Inc | 6 | $13 | 0.00% | −41−87.2% | Reduced |
| Fifth Third Bancorp | 6 | $13 | 0.00% | +6 | New |
| Sunbelt Securities, Inc. | 17 | $37 | 0.00% | +17 | New |
| SBI Securities Co., Ltd. | 20 | $43 | 0.00% | 00.0% | Unchanged |
| Kingdom Financial Group LLC. | 48 | $103 | 0.00% | 00.0% | Unchanged |
| Lloyd Advisory Services, LLC. | 48 | $103 | 0.00% | +48 | New |
| MAI Capital Management | 67 | $145 | 0.00% | +67 | New |
| SRS Capital Advisors, Inc. | 179 | $385 | 0.00% | +179 | New |
| Farther Finance Advisors, LLC | 156 | $395 | 0.00% | +156 | New |
| National Bank of Canada | 200 | $430 | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 240 | $516 | 0.00% | +31+14.8% | Added |
| Fortitude Family Office, LLC | 255 | $548 | 0.00% | +255 | New |
| Advisory Services Network, LLC | 271 | $583 | 0.00% | +271 | New |
| Root Financial Partners, LLC | 305 | $656 | 0.00% | +305 | New |
| Basecamp Wealth Advisors LLC | 329 | $707 | 0.00% | 00.0% | Unchanged |
| Mark Sheptoff Financial Planning, LLC | 300 | $771 | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 367 | $789 | 0.00% | 00.0% | Unchanged |
| Bryn Mawr Trust Co | 400 | $860 | 0.00% | 00.0% | Unchanged |
| Hughes Financial Services, LLC | 412 | $886 | 0.00% | −141−25.5% | Reduced |
| Federation des caisses Desjardins du Quebec | 415 | $892 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 593 | $1.27K | 0.00% | +30+5.3% | Added |
| Allworth Financial LP | 627 | $1.35K | 0.00% | +627 | New |
| UMA Financial Services, Inc. | 752 | $1.62K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 887 | $1.91K | 0.00% | +383+76.0% | Added |
| Nisa Investment Advisors, LLC | 1,016 | $2.18K | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 1,523 | $3.27K | 0.00% | +448+41.7% | Added |
| State of Wyoming | 1,645 | $3.54K | 0.00% | +1,645 | New |
| Optiver Holding B.V. | 1,701 | $3.66K | 0.00% | +1,701 | New |
| Sterling Capital Management LLC | 2,806 | $6.03K | 0.00% | −1,615−36.5% | Reduced |
| Essential Partners LLC | 3,857 | $8.29K | 0.00% | +3,426+794.9% | Added |
| Citigroup Inc | 4,639 | $9.97K | 0.00% | −1,516−24.6% | Reduced |
| California State Teachers Retirement System | 4,894 | $10.5K | 0.00% | −46−0.9% | Reduced |
| Tower Research Capital LLC (TRC) | 5,943 | $12.8K | 0.00% | −33,577−85.0% | Reduced |
| Royal Bank of Canada | 7,047 | $15.0K | 0.00% | +2,369+50.6% | Added |
| Ameritas Investment Partners, Inc. | 8,175 | $17.6K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 8,346 | $17.9K | 0.00% | +2,307+38.2% | Added |
| New York State Common Retirement Fund | 10,310 | $22.2K | 0.00% | 00.0% | Unchanged |
| Captrust Financial Advisors | 10,648 | $22.9K | 0.00% | +10,648 | New |
| HighTower Advisors, LLC | 10,760 | $23.1K | 0.00% | +749+7.5% | Added |
| Merit Financial Group, LLC | 10,928 | $23.5K | 0.00% | +10,928 | New |
| ProShare Advisors LLC | 13,188 | $28.4K | 0.00% | −1,484−10.1% | Reduced |
| Hamilton Lane Advisors LLC | 14,400 | $31.0K | 0.02% | +14,400 | New |
| Neuberger Berman Group LLC | 14,528 | $31.2K | 0.00% | +355+2.5% | Added |
| Voya Investment Management LLC | 15,478 | $33.3K | 0.00% | +1,549+11.1% | Added |
| Mariner, LLC | 18,799 | $40.4K | 0.00% | +18,799 | New |
| Bronte Capital Management Pty Ltd. | 19,282 | $41.5K | 0.00% | 00.0% | Unchanged |
| Quadrature Capital Ltd | 19,486 | $41.9K | 0.00% | −42,787−68.7% | Reduced |
| BNP Paribas Arbitrage, SA | 20,027 | $43.1K | 0.00% | −2,358−10.5% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 18,197 | $43.9K | 0.00% | +18,197 | New |
| Police & Firemen's Retirement System of New Jersey | 23,426 | $50.4K | 0.00% | 00.0% | Unchanged |
| Verdad Advisers, LP | 23,554 | $50.6K | 0.06% | +23,554 | New |
| Prudential Financial Inc | 23,795 | $51.2K | 0.00% | −8,430−26.2% | Reduced |
| Intech Investment Management LLC | 23,954 | $51.5K | 0.00% | −10,556−30.6% | Reduced |
| Diversified Trust Co | 25,895 | $55.7K | 0.00% | +11,793+83.6% | Added |
| Manufacturers Life Insurance Company, The | 26,148 | $56.2K | 0.00% | −2,681−9.3% | Reduced |
| Cerity Partners LLC | 26,976 | $58.0K | 0.00% | +13,294+97.2% | Added |
| CWM, LLC | 28,985 | $62.3K | 0.00% | +16,821+138.3% | Added |
| Vontobel Holding Ltd. | 30,000 | $64.5K | 0.00% | 00.0% | Unchanged |
| Vanguard Global Advisers, LLC | 31,302 | $67.3K | 0.00% | +31,302 | New |
| Wells Fargo & Company | 34,526 | $74.2K | 0.00% | −55,582−61.7% | Reduced |
| JPMorgan Chase & Co | 37,379 | $75.5K | 0.00% | +4,756+14.6% | Added |
| MetLife Investment Management | 36,208 | $77.8K | 0.00% | +36,208 | New |
| Barclays PLC | 42,591 | $91.6K | 0.00% | −356,096−89.3% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 42,661 | $91.7K | 0.00% | +5,390+14.5% | Added |
| Ieq Capital, LLC | 47,080 | $101.2K | 0.00% | +47,080 | New |
| HSBC Holdings PLC | 48,523 | $104.8K | 0.00% | +20.0% | Added |
| JustInvest LLC | 50,629 | $108.9K | 0.00% | −2,427−4.6% | Reduced |
| SEI Investments Co | 53,846 | $115.8K | 0.00% | +36,962+218.9% | Added |
| Spears Abacus Advisors LLC | 54,642 | $117.5K | 0.00% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 56,100 | $121.0K | 0.00% | −103−0.2% | Reduced |
| Russell Investments Group, Ltd. | 66,131 | $142.2K | 0.00% | −5,756−8.0% | Reduced |
| Alliancebernstein L.P. | 92,940 | $145.0K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 68,477 | $147.2K | 0.00% | −13,540−16.5% | Reduced |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 69,666 | $149.8K | 0.00% | +69,666 | New |
| Jasper Ridge Partners, L.P. | 73,531 | $158.1K | 0.00% | −21,537−22.7% | Reduced |
| Blackstone Group Inc. | 77,145 | $165.9K | 0.00% | +10,286+15.4% | Added |
| Citadel Advisors LLC | 77,545 | $166.7K | 0.00% | −16,002−17.1% | Reduced |
| Gsa Capital Partners LLP | 78,207 | $168.0K | 0.01% | −147,359−65.3% | Reduced |
| Point72 Asset Management, L.P. | 80,091 | $172.2K | 0.00% | +56,989+246.7% | Added |
| STRS Ohio | 86,500 | $186.0K | 0.00% | −23,900−21.6% | Reduced |
| Odyssean, LLC | 89,783 | $193.0K | 0.07% | +89,783 | New |
| Rhumbline Advisers | 101,327 | $217.8K | 0.00% | −599−0.6% | Reduced |
| Susquehanna International Group, LLP | 107,597 | $231.3K | 0.00% | −183,583−63.0% | Reduced |
| Public Employees Retirement System of Ohio | 136,000 | $292.4K | 0.00% | 00.0% | Unchanged |
| Bridgeway Capital Management, LLC | 142,500 | $306.4K | 0.01% | +27,500+23.9% | Added |
| UBS Group AG | 145,344 | $312.5K | 0.00% | +25,933+21.7% | Added |
| Utah Retirement Systems | 154,290 | $331.7K | 0.00% | +20,572+15.4% | Added |
| Nuveen, LLC | 154,930 | $333.1K | 0.00% | +21,682+16.3% | Added |
| Canada Pension Plan Investment Board | 183,200 | $393.9K | 0.00% | +10,900+6.3% | Added |
| Nano Cap New Millennium Growth Fund L P | 200,000 | $430.0K | 0.40% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 252,297 | $542.4K | 0.00% | +34,435+15.8% | Added |
| Invesco Ltd. | 265,067 | $569.9K | 0.00% | −14,401−5.2% | Reduced |
| Ameriprise Financial Inc | 271,272 | $583.2K | 0.00% | −83,027−23.4% | Reduced |
| Dimensional Fund Advisors LP | 283,817 | $609.8K | 0.00% | +84,691+42.5% | Added |
| Morgan Stanley | 364,567 | $783.8K | 0.00% | +45,495+14.3% | Added |
| Bank of America Corp | 380,908 | $819.0K | 0.00% | +246,402+183.2% | Added |
| Jane Street Group, LLC | 399,464 | $858.8K | 0.00% | −594,449−59.8% | Reduced |
| Affinity Asset Advisors, LLC | 500,000 | $1.07M | 0.06% | +500,000 | New |
| Boothbay Fund Management, LLC | 559,726 | $1.20M | 0.03% | 00.0% | Unchanged |