Alector, Inc. - ALEC

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q3 2026 · Compare: Q2 2026
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
TCG Crossover Management, LLC History No change 10,000,000 20,100 0.48% 0.48% 1 0 0.0% Q2 2026 Aug 14, 2026
BlackRock, Inc. History No change 7,847,879 15,774 0.0% 0.0% 2 0 0.0% Q2 2026 Aug 07, 2026
ACADIAN ASSET MANAGEMENT LLC History No change 4,414,345 8,863 0.01% 0.01% 3 0 0.0% Q2 2026 Aug 13, 2026
Nantahala Capital Management, LLC History No change 4,318,109 8,679 0.29% 0.29% 4 0 0.0% Q2 2026 Aug 14, 2026
VANGUARD CAPITAL MANAGEMENT LLC History No change 4,009,340 8,058 0.0% 0.0% 5 0 0.0% Q2 2026 Aug 13, 2026
Kynam Capital Management, LP History No change 3,808,494 7,655 0.42% 0.42% 6 0 0.0% Q2 2026 Aug 14, 2026
BALYASNY ASSET MANAGEMENT L.P. History No change 3,751,326 7,540 0.01% 0.01% 7 0 0.0% Q2 2026 Aug 14, 2026
Merck & Co., Inc. History No change 3,545,719 7,126 1.35% 1.35% 8 0 0.0% Q2 2026 Aug 07, 2026
683 Capital Management, LLC History No change 3,200,000 6,432 0.32% 0.32% 9 0 0.0% Q2 2026 Aug 14, 2026
D. E. Shaw & Co., Inc. History No change 2,959,983 5,949 0.0% 0.0% 10 0 0.0% Q2 2026 Aug 14, 2026
ADAR1 Capital Management, LLC History No change 2,883,583 5,796 0.27% 0.27% 11 0 0.0% Q2 2026 Aug 14, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC History No change 2,820,493 5,669 0.0% 0.0% 12 0 0.0% Q2 2026 Aug 13, 2026
GEODE CAPITAL MANAGEMENT, LLC History No change 2,454,271 4,934 0.0% 0.0% 13 0 0.0% Q2 2026 Aug 12, 2026
Spruce Street Capital LP History No change 2,101,068 4,223 0.83% 0.83% 14 0 0.0% Q2 2026 Aug 13, 2026
MILLENNIUM MANAGEMENT LLC History No change 1,988,835 3,997 0.0% 0.0% 15 0 0.0% Q2 2026 Aug 14, 2026
Ikarian Capital, LLC History No change 1,982,606 3,985 0.43% 0.43% 16 0 0.0% Q2 2026 Aug 14, 2026
STATE STREET CORP History No change 1,879,765 3,778 0.0% 0.0% 17 0 0.0% Q2 2026 Sep 22, 2026
JACOBS LEVY EQUITY MANAGEMENT, INC History No change 1,765,929 3,549 0.01% 0.01% 18 0 0.0% Q2 2026 Aug 14, 2026
MEDICI CAPITAL LLC History No change 1,652,520 3,321 6.51% 6.51% 19 0 0.0% Q2 2026 Aug 11, 2026
Affinity Asset Advisors, LLC History No change 1,510,000 3,035 0.14% 0.14% 20 0 0.0% Q2 2026 Aug 13, 2026
Eversept Partners, LP History No change 1,423,873 2,861 0.15% 0.15% 21 0 0.0% Q2 2026 Aug 14, 2026
FMR LLC History No change 1,396,398 2,806 0.0% 0.0% 22 0 0.0% Q2 2026 Aug 13, 2026
MACKENZIE FINANCIAL CORP History Added to 1,461,163 2,703 0.0% 0.0% 23 +351,393 31.66% Q3 2026 Nov 02, 2026
AQR CAPITAL MANAGEMENT LLC History No change 1,309,577 2,632 0.0% 0.0% 24 0 0.0% Q2 2026 Aug 14, 2026
Euclidean Capital LLC History No change 1,307,858 2,628 0.6% 0.6% 25 0 0.0% Q2 2026 Aug 14, 2026
DEUTSCHE BANK AG\ History No change 1,098,388 2,207 0.0% 0.0% 26 0 0.0% Q2 2026 Aug 07, 2026
DEERFIELD MANAGEMENT COMPANY, L.P. History No change 1,055,192 2,120 0.02% 0.02% 27 0 0.0% Q2 2026 Aug 14, 2026
TWO SIGMA INVESTMENTS, LP History No change 1,045,376 2,101 0.0% 0.0% 28 0 0.0% Q2 2026 Aug 14, 2026
RENAISSANCE TECHNOLOGIES LLC History No change 935,166 1,879 0.0% 0.0% 29 0 0.0% Q2 2026 Aug 13, 2026
DAFNA Capital Management LLC History No change 908,351 1,825 0.35% 0.35% 30 0 0.0% Q2 2026 Aug 14, 2026
Elmind Capital, LP History No change 900,000 1,809 0.45% 0.45% 31 0 0.0% Q2 2026 Aug 14, 2026
PANAGORA ASSET MANAGEMENT INC History No change 845,999 1,700 0.01% 0.01% 32 0 0.0% Q2 2026 Aug 06, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC History No change 818,831 1,645 0.0% 0.0% 33 0 0.0% Q2 2026 Aug 14, 2026
NORTHERN TRUST CORP History No change 773,462 1,554 0.0% 0.0% 34 0 0.0% Q2 2026 Aug 13, 2026
VANGUARD FIDUCIARY TRUST CO History No change 663,592 1,333 0.0% 0.0% 35 0 0.0% Q2 2026 Aug 13, 2026
MARSHALL WACE, LLP History No change 598,559 1,203 0.0% 0.0% 36 0 0.0% Q2 2026 Aug 13, 2026
BOOTHBAY FUND MANAGEMENT, LLC History No change 532,850 1,071 0.01% 0.01% 37 0 0.0% Q2 2026 Aug 14, 2026
CITADEL ADVISORS LLC History No change 500,132 1,005 0.0% 0.0% 38 0 0.0% Q2 2026 Sep 02, 2026
GOLDMAN SACHS GROUP INC History No change 433,875 872 0.0% 0.0% 39 0 0.0% Q2 2026 Aug 14, 2026
XTX Topco Ltd History No change 399,681 803 0.01% 0.01% 40 0 0.0% Q2 2026 Aug 14, 2026
CANTOR FITZGERALD, L. P. History No change 295,492 593 0.01% 0.01% 41 0 0.0% Q2 2026 Aug 14, 2026
UBS Group AG History No change 273,780 550 0.0% 0.0% 42 0 0.0% Q2 2026 Aug 13, 2026
Invesco Ltd. History No change 257,139 516 0.0% 0.0% 43 0 0.0% Q2 2026 Aug 14, 2026
Bank of New York Mellon Corp History Added to 251,966 466 0.0% 0.0% 44 +1,873 0.75% Q3 2026 Nov 05, 2026
AMERIPRISE FINANCIAL INC History No change 224,530 451 0.0% 0.0% 45 0 0.0% Q2 2026 Aug 14, 2026
NANO CAP NEW MILLENNIUM GROWTH FUND L P History No change 200,000 402 0.31% 0.31% 46 0 0.0% Q2 2026 Aug 14, 2026
LMR Partners LLP History No change 200,000 402 0.0% 0.0% 47 0 0.0% Q2 2026 Aug 14, 2026
Nuveen, LLC History No change 176,234 354 0.0% 0.0% 48 0 0.0% Q2 2026 Aug 11, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History No change 172,423 346 0.0% 0.0% 49 0 0.0% Q2 2026 Aug 14, 2026
Utah Retirement Systems History No change 154,290 310 0.0% 0.0% 50 0 0.0% Q2 2026 Aug 14, 2026
BANK OF AMERICA CORP /DE/ History No change 142,678 286 0.0% 0.0% 51 0 0.0% Q2 2026 Aug 14, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC History No change 142,500 286 0.01% 0.01% 52 0 0.0% Q2 2026 Aug 14, 2026
CANADA PENSION PLAN INVESTMENT BOARD History No change 131,300 263 0.0% 0.0% 53 0 0.0% Q2 2026 Aug 14, 2026
STRS OHIO History Added to 139,900 258 0.0% 0.0% 54 +38,300 37.7% Q3 2026 Oct 30, 2026
MORGAN STANLEY History No change 120,480 242 0.0% 0.0% 55 0 0.0% Q2 2026 Aug 13, 2026
JANE STREET GROUP, LLC History No change 120,100 241 0.0% 0.0% 56 0 0.0% Q2 2026 Aug 14, 2026
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO History No change 119,769 240 0.0% 0.0% 57 0 0.0% Q2 2026 Aug 17, 2026
ALLIANCEBERNSTEIN L.P. History No change 108,940 234 0.0% 0.0% 58 0 0.0% Q2 2026 Aug 14, 2026
RHUMBLINE ADVISERS History No change 109,532 220 0.0% 0.0% 59 0 0.0% Q2 2026 Aug 11, 2026
Russell Investments Group, Ltd. History No change 98,496 197 0.0% 0.0% 60 0 0.0% Q2 2026 Aug 06, 2026
WELLS FARGO & COMPANY/MN History No change 89,172 179 0.0% 0.0% 61 0 0.0% Q2 2026 Aug 14, 2026
PRICE T ROWE ASSOCIATES INC /MD/ History No change 81,655 165 0.0% 0.0% 62 0 0.0% Q2 2026 Aug 14, 2026
Blackstone Inc. History No change 77,145 155 0.0% 0.0% 63 0 0.0% Q2 2026 Aug 14, 2026
Jasper Ridge Partners, L.P. History No change 73,531 147 0.0% 0.0% 64 0 0.0% Q2 2026 Aug 14, 2026
SEI INVESTMENTS CO History No change 71,151 143 0.0% 0.0% 65 0 0.0% Q2 2026 Aug 14, 2026
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main History No change 69,666 140 0.0% 0.0% 66 0 0.0% Q2 2026 Aug 14, 2026
IEQ CAPITAL, LLC History No change 60,570 121 0.0% 0.0% 67 0 0.0% Q2 2026 Aug 11, 2026
Verdad Advisers, LP History No change 60,509 121 0.12% 0.12% 68 0 0.0% Q2 2026 Aug 14, 2026
MetLife Investment Management, LLC History No change 58,696 117 0.0% 0.0% 69 0 0.0% Q2 2026 Aug 13, 2026
Mariner, LLC History No change 52,709 105 0.0% 0.0% 70 0 0.0% Q2 2026 Aug 13, 2026
Vanguard Personalized Indexing Management, LLC History No change 49,445 99 0.0% 0.0% 71 0 0.0% Q2 2026 Aug 11, 2026
HSBC HOLDINGS PLC History No change 48,523 98 0.0% 0.0% 72 0 0.0% Q2 2026 Aug 14, 2026
Graham Capital Management, L.P. History No change 46,496 93 0.0% 0.0% 73 0 0.0% Q2 2026 Aug 14, 2026
BARCLAYS PLC History No change 44,957 90 0.0% 0.0% 74 0 0.0% Q2 2026 Aug 14, 2026
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. History No change 45,190 90 0.0% 0.0% 75 0 0.0% Q2 2026 Aug 14, 2026
JPMORGAN CHASE & CO History No change 42,998 89 0.0% 0.0% 76 0 0.0% Q2 2026 Aug 12, 2026
Diversified Trust Co History No change 42,351 85 0.0% 0.0% 77 0 0.0% Q2 2026 Jul 17, 2026
Cerity Partners LLC History No change 32,521 65 0.0% 0.0% 78 0 0.0% Q2 2026 Aug 14, 2026
Vanguard Global Advisers, LLC History No change 31,302 62 0.0% 0.0% 79 0 0.0% Q2 2026 Aug 13, 2026
Cannell & Spears LLC History No change 30,342 60 0.0% 0.0% 80 0 0.0% Q2 2026 Aug 11, 2026
ROYAL BANK OF CANADA History No change 26,122 53 0.0% 0.0% 81 0 0.0% Q2 2026 Aug 14, 2026
Point72 Asset Management, L.P. History No change 26,699 53 0.0% 0.0% 82 0 0.0% Q2 2026 Aug 14, 2026
MERCER GLOBAL ADVISORS INC /ADV History No change 25,504 51 0.0% 0.0% 83 0 0.0% Q2 2026 Aug 19, 2026
GROUP ONE TRADING LLC History No change 25,208 50 0.0% 0.0% 84 0 0.0% Q2 2026 Aug 13, 2026
INTECH INVESTMENT MANAGEMENT LLC History No change 24,530 49 0.0% 0.0% 85 0 0.0% Q2 2026 Aug 10, 2026
Police & Firemen's Retirement System of New Jersey History No change 23,426 47 0.0% 0.0% 86 0 0.0% Q2 2026 Jul 23, 2026
VOYA INVESTMENT MANAGEMENT LLC History No change 21,898 44 0.0% 0.0% 87 0 0.0% Q2 2026 Aug 12, 2026
CITIGROUP INC History Reduced 22,824 42 0.0% 0.0% 88 -23,451 -50.68% Q3 2026 Nov 04, 2026
BNP PARIBAS FINANCIAL MARKETS History No change 21,200 42 0.0% 0.0% 89 0 0.0% Q2 2026 Aug 13, 2026
MANUFACTURERS LIFE INSURANCE COMPANY, THE History No change 19,397 38 0.0% 0.0% 90 0 0.0% Q2 2026 Sep 09, 2026
Qube Research & Technologies Ltd History No change 16,569 33 0.0% 0.0% 91 0 0.0% Q2 2026 Aug 14, 2026
PRUDENTIAL FINANCIAL INC History No change 16,015 32 0.0% 0.0% 92 0 0.0% Q2 2026 Aug 12, 2026
CAPTRUST FINANCIAL ADVISORS History No change 16,037 32 0.0% 0.0% 93 0 0.0% Q2 2026 Aug 13, 2026
Tower Research Capital LLC (TRC) History No change 14,450 29 0.0% 0.0% 94 0 0.0% Q2 2026 Aug 11, 2026
Quadrature Capital Ltd History No change 14,169 28 0.0% 0.0% 95 0 0.0% Q2 2026 Aug 06, 2026
Neuberger Berman Group LLC History No change 13,521 27 0.0% 0.0% 96 0 0.0% Q2 2026 Oct 27, 2026
Bronte Capital Management Pty Ltd. History No change 11,758 23 0.0% 0.0% 97 0 0.0% Q2 2026 Aug 04, 2026
Merit Financial Group, LLC History No change 11,243 22 0.0% 0.0% 98 0 0.0% Q2 2026 Jul 20, 2026
ProShare Advisors LLC History Reduced 11,693 21 0.0% 0.0% 99 -1,155 -8.99% Q3 2026 Oct 28, 2026
PRINCIPAL FINANCIAL GROUP INC History New 10,919 20 0.0% — 102 +10,919 New Q3 2026 Nov 02, 2026
NEW YORK STATE COMMON RETIREMENT FUND History No change 10,310 20 0.0% 0.0% 100 0 0.0% Q2 2026 Jul 29, 2026
HighTower Advisors, LLC History No change 10,227 20 0.0% 0.0% 101 0 0.0% Q2 2026 Aug 05, 2026
COMMONWEALTH EQUITY SERVICES, LLC History New 10,300 19 0.0% — 103 +10,300 New Q3 2026 Nov 02, 2026
Legal & General Group Plc History No change 8,346 16 0.0% 0.0% 104 0 0.0% Q2 2026 Aug 14, 2026
Ameritas Investment Partners, Inc. History No change 8,175 16 0.0% 0.0% 105 0 0.0% Q2 2026 Aug 13, 2026
Arax Advisory Partners History No change 5,433 10 0.0% 0.0% 106 0 0.0% Q2 2026 Aug 10, 2026
China Universal Asset Management Co., Ltd. History Added to 5,000 9 0.0% 0.0% 107 +1,400 38.89% Q3 2026 Oct 27, 2026
Sterling Capital Management LLC History Added to 3,065 5 0.0% 0.0% 108 +2,542 486.04% Q3 2026 Oct 22, 2026
Allworth Financial LP History No change 2,479 4 0.0% 0.0% 109 0 0.0% Q2 2026 Aug 11, 2026
GAMMA Investing LLC History Added to 1,732 3 0.0% 0.0% 110 +209 13.72% Q3 2026 Oct 08, 2026
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM History No change 1,274 2 0.0% 0.0% 111 0 0.0% Q2 2026 Aug 24, 2026
NISA INVESTMENT ADVISORS, LLC History Reduced 1,016 1 0.0% 0.0% 113 -400 -28.25% Q3 2026 Oct 20, 2026
ROTHSCHILD INVESTMENT LLC History No change 680 1 0.0% 0.0% 112 0 0.0% Q2 2026 Aug 06, 2026
Physician Wealth Advisors, Inc. History No change 752 1 0.0% 0.0% 114 0 0.0% Q3 2026 Oct 20, 2026
Optiver Holding B.V. History No change 925 1 0.0% 0.0% 115 0 0.0% Q2 2026 Aug 12, 2026
SIMPLEX TRADING, LLC History Closed out 0 0 — 0.0% — -85,488 -100.0% Q3 2026 Nov 04, 2026
DIMENSIONAL FUND ADVISORS LP History Closed out 0 0 — 0.0% — -33,728 -100.0% Q3 2026 Nov 04, 2026
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC History Closed out 0 0 — 0.0% — -30,251 -100.0% Q3 2026 Oct 13, 2026
Vontobel Holding Ltd. History Closed out 0 0 — 0.0% — -30,000 -100.0% Q3 2026 Oct 16, 2026
Creative Planning History Closed out 0 0 — 0.0% — -15,015 -100.0% Q3 2026 Nov 02, 2026
HAMILTON LANE ADVISORS LLC History Closed out 0 0 — 0.02% — -14,400 -100.0% Q3 2026 Oct 21, 2026
Essential Partners LLC History Reduced 418 0 — 0.0% — -819 -66.21% Q3 2026 Oct 14, 2026
EverSource Wealth Advisors, LLC History Reduced 496 0 — 0.0% — -813 -62.11% Q3 2026 Nov 04, 2026
Parkside Financial Bank & Trust History New 495 0 — — — +495 New Q3 2026 Oct 27, 2026
True Wealth Design, LLC History Reduced 446 0 — 0.0% — -421 -48.56% Q3 2026 Oct 13, 2026
Root Financial Partners, LLC History New 168 0 — — — +168 New Q3 2026 Oct 21, 2026
Farther Finance Advisors, LLC History Reduced 90 0 — — — -163 -64.43% Q3 2026 Oct 08, 2026
Fortitude Family Office, LLC History Reduced 15 0 — — — -119 -88.81% Q3 2026 Oct 14, 2026
Wealth Enhancement Trust Services, Inc. History Closed out 0 0 — — — -105 -100.0% Q3 2026 Oct 07, 2026
Caitong International Asset Management Co., Ltd History Added to 96 0 — — — +54 128.57% Q3 2026 Oct 29, 2026
Kingdom Financial Group LLC. History Closed out 0 0 — — — -48 -100.0% Q3 2026 Nov 04, 2026
SBI Securities Co., Ltd. History Closed out 0 0 — — — -20 -100.0% Q3 2026 Oct 21, 2026
William Mack & Associates, Inc. History New 15 0 — — — +15 New Q3 2026 Oct 27, 2026
Hughes Financial Services, LLC History Reduced 383 0 — — — -5 -1.29% Q3 2026 Oct 30, 2026
SJS Investment Consulting Inc. History Added to 47 0 — — — +4 9.3% Q3 2026 Oct 26, 2026
IFP Advisors, Inc History Added to 96 0 — — — +2 2.13% Q3 2026 Oct 16, 2026
FIFTH THIRD BANCORP History No change 6 0 — — — 0 0.0% Q3 2026 Nov 05, 2026
Clearstead Advisors, LLC History No change 125 0 — — — 0 0.0% Q2 2026 Aug 06, 2026
Wilmington Savings Fund Society, FSB History No change 400 0 — — — 0 0.0% Q3 2026 Oct 23, 2026
NATIONAL BANK OF CANADA /FI/ History No change 200 0 — — — 0 0.0% Q2 2026 Aug 10, 2026
MARK SHEPTOFF FINANCIAL PLANNING, LLC History No change 300 0 — — — 0 0.0% Q2 2026 Aug 13, 2026
OSAIC HOLDINGS, INC. History No change 300 0 — — — 0 0.0% Q2 2026 Aug 14, 2026
Rockefeller Capital Management L.P. History No change 367 0 — — — 0 0.0% Q2 2026 Aug 13, 2026
JPL Wealth Management, LLC History No change 18 0 — — — 0 0.0% Q2 2026 Aug 13, 2026
Federation des caisses Desjardins du Quebec History No change 415 0 — — — 0 0.0% Q2 2026 Aug 13, 2026
Basecamp Wealth Advisors LLC History No change 446 0 — — — 0 0.0% Q2 2026 Aug 14, 2026