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, Q3 2021
Institutional positions in Alector, Inc. as of Sep 30, 2021. 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
- 145
- +8 vs. Q2 2021
- Shares held
- 52.2M
- +3.06M (+6.2%) vs. Q2 2021
- Total value
- $1.19B
- +$167.3M (+16.3%) vs. Q2 2021
- New holders
- 22
- 60 more added
- Sold out
- 14
- 26 more reduced
1 institution that held it in Q2 2021 haven't filed for Q3 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2021: 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, Q3 2021
Shares, value and share of portfolio for each institution holding Alector, Inc.; share changes are against Q2 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Citigroup Inc | 96,507 | $2.20M | 0.00% | −54,737−36.2% | Reduced |
| Alps Advisors Inc | 99,127 | $2.26M | 0.02% | −5,132−4.9% | Reduced |
| PDT Partners, LLC | 102,063 | $2.33M | 0.17% | +9,563+10.3% | Added |
| Alliancebernstein L.P. | 104,142 | $2.38M | 0.00% | +47,342+83.3% | Added |
| DAFNA Capital Management LLC | 107,412 | $2.45M | 0.65% | +107,412 | New |
| Norges Bank | 110,649 | $2.52M | 0.00% | −114,324−50.8% | Reduced |
| Swiss National Bank | 114,000 | $2.60M | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 117,067 | $2.67M | 0.00% | +4,151+3.7% | Added |
| Cannell Peter B & Co Inc | 135,122 | $3.08M | 0.09% | −9,000−6.2% | Reduced |
| Rafferty Asset Management, LLC | 136,905 | $3.12M | 0.02% | +41,851+44.0% | Added |
| UBS Group AG | 141,251 | $3.22M | 0.00% | +126,018+827.3% | Added |
| Two Sigma Advisers, LP | 150,200 | $3.43M | 0.01% | +36,700+32.3% | Added |
| Schroder Investment Management Group | 160,315 | $3.66M | 0.01% | +11,604+7.8% | Added |
| Citadel Advisors LLC | 174,170 | $3.98M | 0.00% | −120,727−40.9% | Reduced |
| Alphabet Inc. | 175,866 | $4.01M | 0.10% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 184,221 | $4.20M | 0.00% | +15,875+9.4% | Added |
| Millennium Management LLC | 214,550 | $4.90M | 0.01% | +155,412+262.8% | Added |
| Baker Bros. Advisors LP | 239,228 | $5.46M | 0.02% | 00.0% | Unchanged |
| Bank of America Corp | 269,147 | $6.14M | 0.00% | +141,372+110.6% | Added |
| Pier Capital, LLC | 306,536 | $7.00M | 0.72% | −30,378−9.0% | Reduced |
| Marshall Wace, LLP | 312,561 | $7.13M | 0.04% | +312,561 | New |
| New Leaf Venture Partners, L.L.C. | 339,569 | $7.75M | 2.24% | 00.0% | Unchanged |
| Baillie Gifford & Co | 340,352 | $7.77M | 0.00% | +39,524+13.1% | Added |
| Two Sigma Investments, LP | 340,486 | $7.77M | 0.02% | +340,486 | New |
| Nuveen Asset Management, LLC | 349,111 | $7.97M | 0.00% | +116,871+50.3% | Added |
| Charles Schwab Investment Management Inc | 406,112 | $9.27M | 0.00% | +31,919+8.5% | Added |
| Voloridge Investment Management, LLC | 425,902 | $9.72M | 0.06% | +318,605+296.9% | Added |
| Goldman Sachs Group Inc | 594,259 | $13.6M | 0.00% | +67,890+12.9% | Added |
| Northern Trust Corp | 606,597 | $13.8M | 0.00% | −10,251−1.7% | Reduced |
| Morgan Stanley | 805,260 | $18.4M | 0.00% | +201,699+33.4% | Added |
| Gilder Gagnon Howe & Co LLC | 872,048 | $19.9M | 0.10% | +890.0% | Added |
| Euclidean Capital LLC | 980,894 | $22.4M | 10.88% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 999,768 | $22.8M | 0.00% | +19,161+2.0% | Added |
| Deerfield Management Company, L.P. (Series C) | 1,055,192 | $24.1M | 0.47% | 00.0% | Unchanged |
| Marshall Wace North America L.P. | 1,083,580 | $24.7M | 0.11% | +1,083,580 | New |
| Casdin Capital, LLC | 1,650,000 | $37.7M | 0.94% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 1,866,898 | $42.6M | 0.00% | −754,915−28.8% | Reduced |
| Franklin Resources Inc | 2,239,417 | $51.1M | 0.02% | −1,083,848−32.6% | Reduced |
| JPMorgan Chase & Co | 2,559,893 | $58.4M | 0.01% | −85,949−3.2% | Reduced |
| State Street Corp | 3,584,519 | $81.8M | 0.00% | +843,189+30.8% | Added |
| FMR LLC | 4,831,794 | $110.3M | 0.01% | +739,702+18.1% | Added |
| EcoR1 Capital, LLC | 4,994,970 | $114.0M | 4.03% | +752,336+17.7% | Added |
| Federated Hermes, Inc. | 5,000,918 | $114.1M | 0.22% | +459,119+10.1% | Added |
| Vanguard Group Inc | 5,077,433 | $115.9M | 0.00% | +146,113+3.0% | Added |
| BlackRock Inc. | 5,270,814 | $120.3M | 0.00% | +85,050+1.6% | Added |
| Ikarian Capital, LLC | 0 | $0 | 0.00% | −674,723−100.0% | Sold out |
| OrbiMed Advisors LLC | 0 | $0 | 0.00% | −611,478−100.0% | Sold out |
| Bridger Management, LLC | 0 | $0 | 0.00% | −203,900−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −77,811−100.0% | Sold out |
| First Trust Advisors LP | 0 | $0 | 0.00% | −58,304−100.0% | Sold out |
| Belvedere Trading LLC | 0 | $0 | 0.00% | −24,711−100.0% | Sold out |
| Integral Health Asset Management, LLC | 0 | $0 | 0.00% | −35,000−100.0% | Sold out |
| Blueshift Asset Management, LLC | 0 | $0 | 0.00% | −18,675−100.0% | Sold out |
| Thrivent Financial for Lutherans | 0 | $0 | 0.00% | −18,587−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −14,923−100.0% | Sold out |
| EPIQ Capital Group, LLC | 0 | $0 | 0.00% | −10,687−100.0% | Sold out |
| Vident Investment Advisory, LLC | 0 | $0 | 0.00% | −10,124−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −9,901−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −124−100.0% | Sold out |
| CWM, LLC | – | – | – | – | Not filed |