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 |
|---|---|---|---|---|---|
| New York State Common Retirement Fund | 10,310 | $22.2K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 8,346 | $17.9K | 0.00% | +2,307+38.2% | Added |
| Ameritas Investment Partners, Inc. | 8,175 | $17.6K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 7,047 | $15.0K | 0.00% | +2,369+50.6% | Added |
| Tower Research Capital LLC (TRC) | 5,943 | $12.8K | 0.00% | −33,577−85.0% | Reduced |
| California State Teachers Retirement System | 4,894 | $10.5K | 0.00% | −46−0.9% | Reduced |
| Citigroup Inc | 4,639 | $9.97K | 0.00% | −1,516−24.6% | Reduced |
| Essential Partners LLC | 3,857 | $8.29K | 0.00% | +3,426+794.9% | Added |
| Sterling Capital Management LLC | 2,806 | $6.03K | 0.00% | −1,615−36.5% | Reduced |
| Optiver Holding B.V. | 1,701 | $3.66K | 0.00% | +1,701 | New |
| State of Wyoming | 1,645 | $3.54K | 0.00% | +1,645 | New |
| GAMMA Investing LLC | 1,523 | $3.27K | 0.00% | +448+41.7% | Added |
| Nisa Investment Advisors, LLC | 1,016 | $2.18K | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 887 | $1.91K | 0.00% | +383+76.0% | Added |
| UMA Financial Services, Inc. | 752 | $1.62K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 627 | $1.35K | 0.00% | +627 | New |
| True Wealth Design, LLC | 593 | $1.27K | 0.00% | +30+5.3% | Added |
| Federation des caisses Desjardins du Quebec | 415 | $892 | 0.00% | 00.0% | Unchanged |
| Hughes Financial Services, LLC | 412 | $886 | 0.00% | −141−25.5% | Reduced |
| Bryn Mawr Trust Co | 400 | $860 | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 367 | $789 | 0.00% | 00.0% | Unchanged |
| Mark Sheptoff Financial Planning, LLC | 300 | $771 | 0.00% | 00.0% | Unchanged |
| Basecamp Wealth Advisors LLC | 329 | $707 | 0.00% | 00.0% | Unchanged |
| Root Financial Partners, LLC | 305 | $656 | 0.00% | +305 | New |
| Advisory Services Network, LLC | 271 | $583 | 0.00% | +271 | New |
| Fortitude Family Office, LLC | 255 | $548 | 0.00% | +255 | New |
| Rothschild Investment LLC | 240 | $516 | 0.00% | +31+14.8% | Added |
| National Bank of Canada | 200 | $430 | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 156 | $395 | 0.00% | +156 | New |
| SRS Capital Advisors, Inc. | 179 | $385 | 0.00% | +179 | New |
| MAI Capital Management | 67 | $145 | 0.00% | +67 | New |
| Kingdom Financial Group LLC. | 48 | $103 | 0.00% | 00.0% | Unchanged |
| Lloyd Advisory Services, LLC. | 48 | $103 | 0.00% | +48 | New |
| SBI Securities Co., Ltd. | 20 | $43 | 0.00% | 00.0% | Unchanged |
| Sunbelt Securities, Inc. | 17 | $37 | 0.00% | +17 | New |
| IFP Advisors, Inc | 6 | $13 | 0.00% | −41−87.2% | Reduced |
| Fifth Third Bancorp | 6 | $13 | 0.00% | +6 | New |
| Caitong International Asset Management Co., Ltd | 2 | $4 | 0.00% | +2 | New |
| Vestal Point Capital, LP | 0 | $0 | 0.00% | −755,000−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −651,800−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −104,851−100.0% | Sold out |
| Los Angeles Capital Management LLC | 0 | $0 | 0.00% | −93,052−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | −86,162−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −77,618−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −57,341−100.0% | Sold out |
| Lexington Partners L.P. | 0 | $0 | 0.00% | −53,488−100.0% | Sold out |
| Oxford Asset Management LLP | 0 | $0 | 0.00% | −42,905−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −41,282−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −27,002−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −25,881−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −21,886−100.0% | Sold out |
| Hershey Trust Co | 0 | $0 | 0.00% | −20,572−100.0% | Sold out |
| R Squared Ltd | 0 | $0 | 0.00% | −12,474−100.0% | Sold out |
| CI Private Wealth, LLC | 0 | $0 | 0.00% | −10,288−100.0% | Sold out |
| Texas Yale Capital Corp. | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −2,523−100.0% | Sold out |
| Advisor Group Holdings, Inc. | 0 | $0 | 0.00% | −620−100.0% | Sold out |
| DekaBank Deutsche Girozentrale | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |