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 2025
Institutional positions in Alector, Inc. as of Dec 31, 2025. 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
- 131
- −14 vs. Q3 2025
- Shares held
- 84.4M
- +10.2M (+13.7%) vs. Q3 2025
- Total value
- $131.5M
- −$88.3M (−40.2%) vs. Q3 2025
- New holders
- 25
- 40 more added
- Sold out
- 39
- 41 more reduced
4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Alector, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Comerica Bank | 9 | $14 | 0.00% | −12−57.1% | Reduced |
| SBI Securities Co., Ltd. | 20 | $31 | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 47 | $73 | 0.00% | 00.0% | Unchanged |
| Kingdom Financial Group LLC. | 48 | $75 | 0.00% | +48 | New |
| National Bank of Canada | 200 | $312 | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 209 | $326 | 0.00% | −10−4.6% | Reduced |
| Mark Sheptoff Financial Planning, LLC | 300 | $468 | 0.00% | 00.0% | Unchanged |
| Basecamp Wealth Advisors LLC | 329 | $513 | 0.00% | +329 | New |
| Rockefeller Capital Management L.P. | 367 | $573 | 0.00% | −1,000−73.2% | Reduced |
| Bryn Mawr Trust Co | 400 | $624 | 0.00% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 415 | $647 | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 431 | $672 | 0.00% | −99−18.7% | Reduced |
| EverSource Wealth Advisors, LLC | 504 | $786 | 0.00% | −684−57.6% | Reduced |
| Hughes Financial Services, LLC | 553 | $863 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 563 | $879 | 0.00% | −236−29.5% | Reduced |
| Advisor Group Holdings, Inc. | 620 | $967 | 0.00% | −500−44.6% | Reduced |
| UMA Financial Services, Inc. | 752 | $1.17K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 1,016 | $1.58K | 0.00% | −2,331−69.6% | Reduced |
| GAMMA Investing LLC | 1,075 | $1.68K | 0.00% | +1,075 | New |
| Amalgamated Bank | 2,523 | $4.00K | 0.00% | −17−0.7% | Reduced |
| Sterling Capital Management LLC | 4,421 | $6.90K | 0.00% | +22+0.5% | Added |
| Royal Bank of Canada | 4,678 | $7.00K | 0.00% | −623,974−99.3% | Reduced |
| California State Teachers Retirement System | 4,940 | $7.71K | 0.00% | −23−0.5% | Reduced |
| Legal & General Group Plc | 6,039 | $9.42K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 6,155 | $9.60K | 0.00% | −47,783−88.6% | Reduced |
| Ameritas Investment Partners, Inc. | 8,175 | $12.8K | 0.00% | 00.0% | Unchanged |
| Texas Yale Capital Corp. | 10,000 | $15.6K | 0.00% | 00.0% | Unchanged |
| HighTower Advisors, LLC | 10,011 | $15.6K | 0.00% | +10,011 | New |
| CI Private Wealth, LLC | 10,288 | $16.0K | 0.00% | +10,288 | New |
| New York State Common Retirement Fund | 10,310 | $16.1K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 12,164 | $19.0K | 0.00% | −13,005−51.7% | Reduced |
| R Squared Ltd | 12,474 | $19.5K | 0.01% | +12,474 | New |
| Cerity Partners LLC | 13,682 | $21.3K | 0.00% | −13,125−49.0% | Reduced |
| Voya Investment Management LLC | 13,929 | $21.7K | 0.00% | 00.0% | Unchanged |
| Diversified Trust Co | 14,102 | $22.0K | 0.00% | 00.0% | Unchanged |
| Neuberger Berman Group LLC | 14,173 | $22.1K | 0.00% | +14,173 | New |
| ProShare Advisors LLC | 14,672 | $22.9K | 0.00% | −759−4.9% | Reduced |
| SEI Investments Co | 16,884 | $26.3K | 0.00% | 00.0% | Unchanged |
| Bronte Capital Management Pty Ltd. | 19,282 | $30.1K | 0.00% | +19,282 | New |
| Hershey Trust Co | 20,572 | $32.1K | 0.00% | +10,286+100.0% | Added |
| Virtu Financial LLC | 21,886 | $34.0K | 0.00% | +21,886 | New |
| BNP Paribas Arbitrage, SA | 22,385 | $34.9K | 0.00% | +4,116+22.5% | Added |
| Point72 Asset Management, L.P. | 23,102 | $36.0K | 0.00% | +22,560+4,162.4% | Added |
| Police & Firemen's Retirement System of New Jersey | 23,426 | $36.5K | 0.00% | 00.0% | Unchanged |
| Dynamic Technology Lab Private Ltd | 25,881 | $40.0K | 0.01% | +25,881 | New |
| SG Americas Securities, LLC | 27,002 | $42.0K | 0.00% | +27,002 | New |
| Manufacturers Life Insurance Company, The | 28,829 | $45.0K | 0.00% | −187,745−86.7% | Reduced |
| Vontobel Holding Ltd. | 30,000 | $46.8K | 0.00% | +4,000+15.4% | Added |
| Prudential Financial Inc | 32,225 | $50.3K | 0.00% | +4,203+15.0% | Added |
| JPMorgan Chase & Co | 32,623 | $50.9K | 0.00% | −103,762−76.1% | Reduced |
| Intech Investment Management LLC | 34,510 | $53.8K | 0.00% | +1,082+3.2% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 37,271 | $58.1K | 0.00% | +5,142+16.0% | Added |
| Tower Research Capital LLC (TRC) | 39,520 | $61.7K | 0.00% | +37,006+1,472.0% | Added |
| Tudor Investment Corp Et Al | 41,282 | $64.4K | 0.00% | 00.0% | Unchanged |
| Oxford Asset Management LLP | 42,905 | $66.9K | 0.02% | +42,905 | New |
| HSBC Holdings PLC | 48,521 | $75.7K | 0.00% | −145−0.3% | Reduced |
| JustInvest LLC | 53,056 | $82.8K | 0.00% | −5,264−9.0% | Reduced |
| Lexington Partners L.P. | 53,488 | $83.4K | 0.02% | +43,380+429.2% | Added |
| Spears Abacus Advisors LLC | 54,642 | $85.2K | 0.00% | −4,581−7.7% | Reduced |
| Price T Rowe Associates Inc | 56,203 | $89.0K | 0.00% | −2,128,829−97.4% | Reduced |
| HRT Financial LP | 57,341 | $89.0K | 0.00% | −2,823−4.7% | Reduced |
| Quadrature Capital Ltd | 62,273 | $97.1K | 0.00% | +62,273 | New |
| Blackstone Group Inc. | 66,859 | $104.3K | 0.00% | +41,144+160.0% | Added |
| Russell Investments Group, Ltd. | 71,887 | $112.1K | 0.00% | −32,937−31.4% | Reduced |
| Squarepoint Ops LLC | 77,618 | $121.1K | 0.00% | +77,618 | New |
| Simplex Trading, LLC | 82,017 | $127.9K | 0.00% | −18,927−18.8% | Reduced |
| Man Group plc | 86,162 | $134.4K | 0.00% | +86,162 | New |
| Wells Fargo & Company | 90,108 | $140.6K | 0.00% | +37,683+71.9% | Added |
| Los Angeles Capital Management LLC | 93,052 | $141.4K | 0.00% | +1,816+2.0% | Added |
| Alliancebernstein L.P. | 92,940 | $145.0K | 0.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 93,547 | $145.9K | 0.00% | −378,034−80.2% | Reduced |
| Jasper Ridge Partners, L.P. | 95,068 | $148.3K | 0.00% | +23,292+32.5% | Added |
| Rhumbline Advisers | 101,926 | $159.0K | 0.00% | −12,344−10.8% | Reduced |
| Graham Capital Management, L.P. | 104,851 | $163.6K | 0.01% | +83,636+394.2% | Added |
| STRS Ohio | 110,400 | $172.2K | 0.00% | 00.0% | Unchanged |
| Bridgeway Capital Management, LLC | 115,000 | $179.4K | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 119,411 | $186.3K | 0.00% | −111,088−48.2% | Reduced |
| Nuveen, LLC | 133,248 | $207.9K | 0.00% | 00.0% | Unchanged |
| Utah Retirement Systems | 133,718 | $208.6K | 0.00% | +61,716+85.7% | Added |
| Bank of America Corp | 134,506 | $209.8K | 0.00% | −111,777−45.4% | Reduced |
| Public Employees Retirement System of Ohio | 136,000 | $212.2K | 0.00% | +67,800+99.4% | Added |
| Canada Pension Plan Investment Board | 172,300 | $268.8K | 0.00% | +172,300 | New |
| Dimensional Fund Advisors LP | 199,126 | $310.5K | 0.00% | −96,720−32.7% | Reduced |
| Nano Cap New Millennium Growth Fund L P | 200,000 | $312.0K | 0.27% | +200,000 | New |
| Bank of New York Mellon Corp | 217,862 | $339.9K | 0.00% | −6,622−2.9% | Reduced |
| Gsa Capital Partners LLP | 225,566 | $352.0K | 0.03% | +225,566 | New |
| Invesco Ltd. | 279,468 | $436.0K | 0.00% | +87,157+45.3% | Added |
| Susquehanna International Group, LLP | 291,180 | $454.2K | 0.00% | −17,480−5.7% | Reduced |
| Morgan Stanley | 319,072 | $497.8K | 0.00% | −115,096−26.5% | Reduced |
| Ameriprise Financial Inc | 354,299 | $552.7K | 0.00% | +80,257+29.3% | Added |
| Barclays PLC | 398,687 | $622.0K | 0.00% | −474,688−54.4% | Reduced |
| Goldman Sachs Group Inc | 437,959 | $683.2K | 0.00% | −171,950−28.2% | Reduced |
| Boothbay Fund Management, LLC | 559,726 | $873.2K | 0.02% | +35,649+6.8% | Added |
| Northern Trust Corp | 587,653 | $916.7K | 0.00% | −46,056−7.3% | Reduced |
| XTX Topco Ltd | 592,839 | $924.8K | 0.02% | +494,326+501.8% | Added |
| AQR Capital Management LLC | 599,569 | $935.3K | 0.00% | +161,482+36.9% | Added |
| Mackenzie Financial Corp | 660,168 | $1.00M | 0.00% | +376,456+132.7% | Added |
| Two Sigma Advisers, LP | 651,800 | $1.02M | 0.00% | +134,400+26.0% | Added |
| Charles Schwab Investment Management Inc | 665,491 | $1.04M | 0.00% | −24,033−3.5% | Reduced |
| Vestal Point Capital, LP | 755,000 | $1.18M | 0.04% | −225,000−23.0% | Reduced |