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, Q4 2021
Institutional positions in Alector, Inc. as of Dec 31, 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
- 167
- +23 vs. Q3 2021
- Shares held
- 54.7M
- +3.58M (+7.0%) vs. Q3 2021
- Total value
- $1.13B
- −$37.1M (−3.2%) vs. Q3 2021
- New holders
- 42
- 53 more added
- Sold out
- 19
- 45 more reduced
1 institution that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2021
Shares, value and share of portfolio for each institution holding Alector, Inc.; share changes are against Q3 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| PDT Partners, LLC | 56,392 | $1.16M | 0.09% | −45,671−44.7% | Reduced |
| Arrowstreet Capital, Limited Partnership | 57,748 | $1.19M | 0.00% | +57,748 | New |
| Rhumbline Advisers | 59,719 | $1.23M | 0.00% | −906−1.5% | Reduced |
| TD Asset Management Inc | 59,857 | $1.24M | 0.00% | 00.0% | Unchanged |
| Putnam Investments LLC | 62,974 | $1.30M | 0.00% | +62,974 | New |
| Squarepoint Ops LLC | 65,329 | $1.35M | 0.01% | −19,345−22.8% | Reduced |
| Deutsche Bank AG | 65,320 | $1.35M | 0.00% | +2,620+4.2% | Added |
| Platinum Investment Management Ltd | 65,380 | $1.35M | 0.04% | 00.0% | Unchanged |
| Alpha DNA Investment Management LLC | 66,852 | $1.38M | 0.88% | +66,852 | New |
| UBS Asset Management Americas Inc | 69,376 | $1.43M | 0.00% | +11,681+20.2% | Added |
| American Century Companies Inc | 76,298 | $1.58M | 0.00% | +76,298 | New |
| California State Teachers Retirement System | 76,407 | $1.58M | 0.00% | +2,354+3.2% | Added |
| Jump Financial, LLC | 81,600 | $1.69M | 0.11% | +40,100+96.6% | Added |
| Ameriprise Financial Inc | 81,808 | $1.69M | 0.00% | +20,480+33.4% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 83,130 | $1.72M | 0.01% | +56,454+211.6% | Added |
| Parametric Portfolio Associates LLC | 83,886 | $1.73M | 0.00% | +5,656+7.2% | Added |
| Wells Fargo & Company | 84,830 | $1.75M | 0.00% | +41,507+95.8% | Added |
| Cubist Systematic Strategies, LLC | 87,441 | $1.81M | 0.02% | +13,790+18.7% | Added |
| AQR Capital Management LLC | 90,576 | $1.87M | 0.00% | +56,037+162.2% | Added |
| State of Wisconsin Investment Board | 91,100 | $1.88M | 0.00% | +4,200+4.8% | Added |
| Alps Advisors Inc | 94,056 | $1.94M | 0.02% | −5,071−5.1% | Reduced |
| Barclays PLC | 109,921 | $2.27M | 0.00% | +36,526+49.8% | Added |
| Swiss National Bank | 115,700 | $2.39M | 0.00% | +1,700+1.5% | Added |
| Cannell Peter B & Co Inc | 134,597 | $2.78M | 0.08% | −525−0.4% | Reduced |
| First Trust Advisors LP | 143,217 | $2.96M | 0.00% | +143,217 | New |
| DAFNA Capital Management LLC | 155,247 | $3.21M | 0.81% | +47,835+44.5% | Added |
| Citigroup Inc | 158,219 | $3.27M | 0.00% | +61,712+63.9% | Added |
| Dimensional Fund Advisors LP | 159,905 | $3.30M | 0.00% | +83,835+110.2% | Added |
| Alliancebernstein L.P. | 161,217 | $3.33M | 0.00% | +57,075+54.8% | Added |
| UBS Group AG | 167,350 | $3.46M | 0.00% | +26,099+18.5% | Added |
| Norges Bank | 174,037 | $3.59M | 0.00% | +63,388+57.3% | Added |
| Alphabet Inc. | 175,866 | $3.63M | 0.09% | 00.0% | Unchanged |
| Rafferty Asset Management, LLC | 179,587 | $3.71M | 0.02% | +42,682+31.2% | Added |
| Susquehanna International Group, LLP | 180,482 | $3.73M | 0.01% | +63,415+54.2% | Added |
| Bank of New York Mellon Corp | 204,713 | $4.23M | 0.00% | +20,492+11.1% | Added |
| Voloridge Investment Management, LLC | 230,867 | $4.77M | 0.03% | −195,035−45.8% | Reduced |
| Baker Bros. Advisors LP | 239,228 | $4.94M | 0.02% | 00.0% | Unchanged |
| Schroder Investment Management Group | 251,996 | $5.20M | 0.01% | +91,681+57.2% | Added |
| Renaissance Technologies LLC | 273,480 | $5.65M | 0.01% | +273,480 | New |
| Two Sigma Advisers, LP | 283,400 | $5.85M | 0.01% | +133,200+88.7% | Added |
| Allspring Global Investments Holdings, LLC | 296,888 | $6.13M | 0.01% | +296,888 | New |
| Pier Capital, LLC | 305,921 | $6.32M | 0.67% | −615−0.2% | Reduced |
| New Leaf Venture Partners, L.L.C. | 339,569 | $7.01M | 2.54% | 00.0% | Unchanged |
| Two Sigma Investments, LP | 347,887 | $7.18M | 0.02% | +7,401+2.2% | Added |
| Baillie Gifford & Co | 359,724 | $7.43M | 0.00% | +19,372+5.7% | Added |
| Nuveen Asset Management, LLC | 386,591 | $7.98M | 0.00% | +37,480+10.7% | Added |
| Millennium Management LLC | 391,206 | $8.08M | 0.01% | +176,656+82.3% | Added |
| Goldman Sachs Group Inc | 403,322 | $8.33M | 0.00% | −190,937−32.1% | Reduced |
| Bank of America Corp | 411,008 | $8.49M | 0.00% | +141,861+52.7% | Added |
| Charles Schwab Investment Management Inc | 412,768 | $8.52M | 0.00% | +6,656+1.6% | Added |
| Northern Trust Corp | 601,986 | $12.4M | 0.00% | −4,611−0.8% | Reduced |
| Gilder Gagnon Howe & Co LLC | 646,963 | $13.4M | 0.08% | −225,085−25.8% | Reduced |
| Euclidean Capital LLC | 980,894 | $20.3M | 11.52% | 00.0% | Unchanged |
| Deerfield Management Company, L.P. (Series C) | 1,055,192 | $21.8M | 0.46% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 1,061,761 | $21.9M | 0.00% | +61,993+6.2% | Added |
| Marshall Wace, LLP | 1,080,854 | $22.3M | 0.04% | +768,293+245.8% | Added |
| Casdin Capital, LLC | 1,650,000 | $34.1M | 0.96% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 1,876,848 | $38.8M | 0.00% | +9,950+0.5% | Added |
| Morgan Stanley | 1,938,260 | $40.0M | 0.00% | +1,133,000+140.7% | Added |
| Franklin Resources Inc | 2,261,803 | $46.7M | 0.02% | +22,386+1.0% | Added |
| JPMorgan Chase & Co | 2,526,635 | $52.2M | 0.01% | −33,258−1.3% | Reduced |
| State Street Corp | 3,063,695 | $63.3M | 0.00% | −520,824−14.5% | Reduced |
| FMR LLC | 4,614,728 | $95.3M | 0.01% | −217,066−4.5% | Reduced |
| EcoR1 Capital, LLC | 4,994,970 | $103.1M | 3.30% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 5,280,847 | $109.0M | 0.20% | +279,929+5.6% | Added |
| BlackRock Inc. | 5,380,409 | $111.1M | 0.00% | +109,595+2.1% | Added |
| Vanguard Group Inc | 5,540,240 | $114.4M | 0.00% | +462,807+9.1% | Added |
| Ghost Tree Capital, LLC | 0 | $0 | 0.00% | −80,000−100.0% | Sold out |
| Alkeon Capital Management LLC | 0 | $0 | 0.00% | −60,000−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −51,730−100.0% | Sold out |
| Duality Advisers, LP | 0 | $0 | 0.00% | −40,393−100.0% | Sold out |
| D. E. Shaw & Co., Inc. | 0 | $0 | 0.00% | −38,548−100.0% | Sold out |
| Vontobel Holding Ltd. | 0 | $0 | 0.00% | −32,000−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −29,872−100.0% | Sold out |
| Prosight Management, LP | 0 | $0 | 0.00% | −27,378−100.0% | Sold out |
| AXA S.A. | 0 | $0 | 0.00% | −24,300−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −18,800−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −15,214−100.0% | Sold out |
| O'Shaughnessy Asset Management, LLC | 0 | $0 | 0.00% | −3,281−100.0% | Sold out |
| Nisa Investment Advisors, LLC | 0 | $0 | 0.00% | −2,450−100.0% | Sold out |
| Meeder Asset Management Inc | 0 | $0 | 0.00% | −2,208−100.0% | Sold out |
| Penserra Capital Management LLC | 0 | $0 | 0.00% | −1,850−100.0% | Sold out |
| Bamco Inc | 0 | $0 | 0.00% | −700−100.0% | Sold out |
| Harbour Investments, Inc. | 0 | $0 | 0.00% | −205−100.0% | Sold out |
| Aspire Private Capital, LLC | 0 | $0 | 0.00% | −200−100.0% | Sold out |
| Brewin Dolphin Ltd | 0 | $0 | 0.00% | −91−100.0% | Sold out |
| Marshall Wace North America L.P. | – | – | – | – | Not filed |