AlectorALEC
13F holders, Q1 2025 (March 31)141holders −9
19new positions
28sold out
6famous investors
$1.24avg. 13F price*
At the end of Q1 2025, 141 institutions reported holding Alector Inc. (ALEC) in their 13F filings, down 9 from Q4 2024. 19 opened new positions and 28 sold out. The largest holders were FMR LLC ($17.7M), Ra Capital Management, L.P. ($11.9M) and BlackRock, Inc. ($10.2M). 6 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Alector Inc.
- CUSIP
- 014442107
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 19 | $1.3M |
| Exits | 28 | $2.2M |
All 13F filers, Q4 2024 → Q1 2025: 4,156,508 shares bought and 4,946,145 shares sold, net −789,637 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 141 holders
| FMR LLC | 0.00% | Reduce -2.0% | 14,390,239 | $17.7M |
| Ra Capital Management, L.P. | 0.20% | No change | 9,695,228 | $11.9M |
| BlackRock, Inc. | 0.00% | Reduce -9.4% | 8,279,702 | $10.2M |
| Vanguard Group Inc. | 0.00% | Add +7.8% | 6,053,041 | $7.4M |
| Merck & Co., Inc. | 2.65% | No change | 3,545,719 | $4.4M |
| Geode Capital Management, LLC | 0.00% | Add +2.5% | 1,962,098 | $2.4M |
| State Street Corp. | 0.00% | Reduce -11.3% | 1,640,262 | $2.0M |
| JPMorgan Chase & Co. | 0.00% | Reduce -9.5% | 1,486,149 | $1.8M |
| Acadian Asset Management LLC | 0.01% | Add +39.8% | 1,440,661 | $1.8M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Add +25.9% | 1,334,032 | $1.6M |
| Euclidean Capital LLC | 0.60% | No change | 1,307,858 | $1.6M |
| Deutsche Bank AG | 0.00% | Reduce -0.4% | 1,101,547 | $1.4M |
| Deerfield Management Company, L.P. | 0.03% | Reduce -1.1% | 1,055,192 | $1.3M |
| Renaissance Technologies | 0.00% | Add +12.9% | 1,033,855 | $1.3M |
| 5AM Venture Management, LLC | 0.46% | No change | 995,841 | $1.2M |
| Ikarian Capital, LLC | 0.38% | No change | 950,000 | $1.2M |
| DAFNA Capital Management LLC | 0.32% | No change | 912,928 | $1.1M |
| Sio Capital Management, LLC | 0.31% | Add +36.0% | 837,159 | $1.0M |
| Franklin Resources Inc. | 0.00% | Reduce -10.3% | 834,270 | $1.0M |
| Northern Trust Corp. | 0.00% | Reduce -8.2% | 697,229 | $858K |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -9.3% | 676,313 | $832K |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -2.9% | 624,730 | $768K |
| Eversept Partners, LP | 0.09% | Add +208.6% | 617,418 | $759K |
| Nuveen, LLC | 0.00% | — | 138,180 | $646K |
| Vestal Point Capital, LP | 0.04% | New | 504,540 | $621K |
| AQR Capital Management | 0.00% | Reduce -12.5% | 492,592 | $606K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -44.5% | 489,334 | $602K |
| D. E. Shaw & Co. | 0.00% | Add +27.2% | 469,301 | $577K |
| Diadema Partners LP | 0.45% | Add +91.0% | 456,546 | $562K |
| Two Sigma Advisers, LP | 0.00% | Reduce -8.6% | 392,900 | $483K |
| ADAR1 Capital Management, LLC | 0.09% | Add +3.3% | 380,330 | $468K |
| Panagora Asset Management Inc. | 0.00% | Reduce -0.7% | 366,545 | $451K |
| Morgan Stanley | 0.00% | Reduce -46.7% | 346,707 | $426K |
| New Leaf Venture Partners, L.L.C. | 0.93% | No change | 339,569 | $418K |
| Bank of America Corp. | 0.00% | Add +6.1% | 337,982 | $416K |
| Almitas Capital LLC | 0.13% | Add +12.9% | 321,568 | $396K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -23.7% | 312,145 | $384K |
| Walleye Capital LLC | 0.00% | Add +108.3% | 305,601 | $376K |
| Boothbay Fund Management, LLC | 0.01% | Reduce -6.7% | 274,360 | $337K |
| Millennium Management | 0.00% | Add +254.6% | 264,816 | $326K |
| Jane Street Group, LLC | 0.00% | Add +4.7% | 256,551 | $316K |
| Susquehanna International Group, LLP | 0.00% | Add +26.7% | 253,119 | $311K |
| Bank of New York Mellon Corp | 0.00% | Add +8.1% | 249,494 | $307K |
| Two Sigma Investments, LP | 0.00% | Reduce -47.4% | 214,425 | $264K |
| State of Wyoming | 0.03% | New | 196,814 | $242K |
| Alphabet Inc. | 0.01% | No change | 175,866 | $216K |
| Medici Capital LLC | 0.25% | No change | 167,191 | $206K |
| BNP Paribas Financial Markets | 0.00% | Reduce -5.0% | 157,309 | $193K |
| Invesco Ltd. | 0.00% | Add +209.6% | 148,576 | $183K |
| Los Angeles Capital Management LLC | 0.00% | Add +59.0% | 144,296 | $177K |
| Susquehanna Fundamental Investments, LLC | 0.00% | Reduce -4.9% | 137,904 | $170K |
| Barclays PLC | 0.00% | Reduce -29.2% | 125,086 | $154K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +0.7% | 123,892 | $152K |
| Rhumbline Advisers | 0.00% | Add +0.6% | 116,635 | $143K |
| TD Asset Management Inc | 0.00% | No change | 111,738 | $137K |
| Sphera Funds Management LTD. | 0.03% | Reduce -66.4% | 109,208 | $134K |
| Persistent Asset Partners Ltd | 0.11% | New | 104,927 | $129K |
| DekaBank Deutsche Girozentrale | 0.00% | No change | 100,000 | $127K |
| STRS Ohio | 0.00% | No change | 102,600 | $126K |
| Cercano Management LLC | 0.00% | No change | 93,633 | $115K |
| UBS Group AG | 0.00% | Reduce -29.7% | 83,046 | $102K |
| Alliancebernstein L.P. | 0.00% | No change | 82,100 | $101K |
| Ieq Capital, LLC | 0.00% | New | 80,406 | $99K |
| Alps Advisors Inc. | 0.00% | Reduce -5.3% | 74,933 | $92K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +2.0% | 74,648 | $92K |
| Citigroup Inc. | 0.00% | Reduce -10.1% | 62,756 | $77K |
| Cannell & Spears LLC | 0.00% | No change | 61,613 | $76K |
| Intech Investment Management LLC | 0.00% | Add +71.7% | 60,751 | $75K |
| SG Americas Securities, LLC | 0.00% | Add +53.2% | 60,248 | $74K |
| HSBC Holdings PLC | 0.00% | Add +0.1% | 58,072 | $73K |
| Squarepoint Ops LLC | 0.00% | Add +351.5% | 59,214 | $73K |
| Marshall Wace, LLP | 0.00% | Add +22.0% | 59,099 | $73K |
| Velan Capital Investment Management LP | 0.07% | No change | 55,000 | $68K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -5.0% | 53,421 | $66K |
| Utah Retirement Systems | 0.00% | No change | 51,430 | $63K |
| Algert Global LLC | 0.00% | No change | 44,460 | $55K |
| Cerity Partners LLC | 0.00% | New | 41,564 | $51K |
| Graham Capital Management, L.P. | 0.00% | New | 41,098 | $51K |
| Tudor Investment Corporation | 0.00% | No change | 40,796 | $50K |
| Corebridge Financial, Inc. | 0.00% | Add +0.1% | 40,171 | $49K |
| Wells Fargo & Company | 0.00% | Add +3.9% | 39,435 | $49K |
| Vanguard Personalized Indexing Management, LLC | 0.00% | Add +166.5% | 34,925 | $43K |
| Cwm, LLC | 0.00% | Add +370.7% | 33,643 | $41K |
| XTX Topco Ltd | 0.00% | Reduce -36.1% | 32,571 | $40K |
| Jasper Ridge Partners, L.P. | 0.00% | No change | 30,632 | $38K |
| Vontobel Holding Ltd. | 0.00% | Add +20.0% | 30,000 | $37K |
| Blackstone Inc. | 0.00% | No change | 25,715 | $32K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 25,570 | $31K |
| Apollon Wealth Management, LLC | 0.00% | No change | 25,000 | $31K |
| Voya Investment Management LLC | 0.00% | Reduce -4.4% | 24,621 | $30K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +54.5% | 22,670 | $28K |
| ProShare Advisors LLC | 0.00% | Reduce -18.8% | 22,221 | $27K |
| Shell Asset Management Co. | 0.00% | Reduce -4.0% | 20,627 | $25K |
| Erste Asset Management GmbH | 0.00% | No change | 19,000 | $25K |
| China Universal Asset Management Co., Ltd. | 0.00% | Reduce -4.3% | 19,875 | $24K |
| Dynamic Technology Lab Private Ltd | 0.00% | New | 19,539 | $24K |
| Cibc World Markets Corp. | 0.00% | New | 18,195 | $22K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 17,004 | $21K |
| Sei Investments Co. | 0.00% | New | 16,884 | $21K |
| Diversified Trust Co. | 0.00% | No change | 14,102 | $17K |
"% of holder's portfolio" is ALEC's weight in each manager's 13F, not the share of Alector Inc. the manager owns.