Alector, Inc. - ALEC

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q2 2026 · Compare: Q1 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% 0.62% 1 0 0.0% Q2 2026 Aug 14, 2026
BlackRock, Inc. History Added to 7,847,879 15,774 0.0% 0.0% 2 +106,634 1.38% Q2 2026 Aug 07, 2026
ACADIAN ASSET MANAGEMENT LLC History Added to 4,414,345 8,863 0.01% 0.01% 3 +375,560 9.3% Q2 2026 Aug 13, 2026
Nantahala Capital Management, LLC History Added to 4,318,109 8,679 0.29% 0.22% 4 +1,502,126 53.34% Q2 2026 Aug 14, 2026
VANGUARD CAPITAL MANAGEMENT LLC History Added to 4,009,340 8,058 0.0% 0.0% 5 +330,618 8.99% Q2 2026 Aug 13, 2026
Kynam Capital Management, LP History Added to 3,808,494 7,655 0.42% 0.27% 6 +1,808,494 90.42% Q2 2026 Aug 14, 2026
BALYASNY ASSET MANAGEMENT L.P. History Added to 3,751,326 7,540 0.01% 0.01% 7 +816,073 27.8% Q2 2026 Aug 14, 2026
Merck & Co., Inc. History No change 3,545,719 7,126 1.35% 2.18% 8 0 0.0% Q2 2026 Aug 07, 2026
683 Capital Management, LLC History No change 3,200,000 6,432 0.32% 0.36% 9 0 0.0% Q2 2026 Aug 14, 2026
D. E. Shaw & Co., Inc. History Reduced 2,959,983 5,949 0.0% 0.0% 10 -372,852 -11.19% Q2 2026 Aug 14, 2026
ADAR1 Capital Management, LLC History Added to 2,883,583 5,796 0.27% 0.13% 11 +1,833,583 174.63% Q2 2026 Aug 14, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC History Added to 2,820,493 5,669 0.0% 0.0% 12 +236,951 9.17% Q2 2026 Aug 13, 2026
GEODE CAPITAL MANAGEMENT, LLC History Added to 2,454,271 4,934 0.0% 0.0% 13 +168,053 7.35% Q2 2026 Aug 12, 2026
Spruce Street Capital LP History No change 2,101,068 4,223 0.83% 1.09% 14 0 0.0% Q2 2026 Aug 13, 2026
MILLENNIUM MANAGEMENT LLC History Added to 1,988,835 3,997 0.0% 0.0% 15 +9,609 0.49% Q2 2026 Aug 14, 2026
Ikarian Capital, LLC History Reduced 1,982,606 3,985 0.43% 0.36% 16 -100,000 -4.8% Q2 2026 Aug 14, 2026
STATE STREET CORP History Added to 1,879,765 3,778 0.0% 0.0% 17 +14,239 0.76% Q2 2026 Aug 07, 2026
JACOBS LEVY EQUITY MANAGEMENT, INC History Reduced 1,765,929 3,549 0.01% 0.02% 18 -388,432 -18.03% Q2 2026 Aug 14, 2026
MEDICI CAPITAL LLC History No change 1,652,520 3,321 6.51% 4.37% 19 0 0.0% Q2 2026 Aug 11, 2026
Affinity Asset Advisors, LLC History Added to 1,510,000 3,035 0.14% 0.06% 20 +1,010,000 202.0% Q2 2026 Aug 13, 2026
Eversept Partners, LP History Added to 1,423,873 2,861 0.15% 0.15% 21 +72,767 5.39% Q2 2026 Aug 14, 2026
FMR LLC History Reduced 1,396,398 2,806 0.0% 0.0% 22 -399,706 -22.25% Q2 2026 Aug 13, 2026
AQR CAPITAL MANAGEMENT LLC History Added to 1,309,577 2,632 0.0% 0.0% 23 +598,243 84.1% Q2 2026 Aug 14, 2026
Euclidean Capital LLC History No change 1,307,858 2,628 0.6% 0.72% 24 0 0.0% Q2 2026 Aug 14, 2026
MACKENZIE FINANCIAL CORP History Added to 1,109,770 2,230 0.0% 0.0% 25 +252,416 29.44% Q2 2026 Aug 13, 2026
DEUTSCHE BANK AG\ History Added to 1,098,388 2,207 0.0% 0.0% 26 +5,485 0.5% Q2 2026 Aug 07, 2026
DEERFIELD MANAGEMENT COMPANY, L.P. History No change 1,055,192 2,120 0.02% 0.03% 27 0 0.0% Q2 2026 Aug 14, 2026
TWO SIGMA INVESTMENTS, LP History Reduced 1,045,376 2,101 0.0% 0.0% 28 -233,930 -18.29% Q2 2026 Aug 14, 2026
RENAISSANCE TECHNOLOGIES LLC History Reduced 935,166 1,879 0.0% 0.0% 29 -352,525 -27.38% Q2 2026 Aug 13, 2026
DAFNA Capital Management LLC History No change 908,351 1,825 0.35% 0.44% 30 0 0.0% Q2 2026 Aug 14, 2026
Elmind Capital, LP History No change 900,000 1,809 0.45% 0.55% 31 0 0.0% Q2 2026 Aug 14, 2026
PANAGORA ASSET MANAGEMENT INC History Added to 845,999 1,700 0.01% 0.0% 32 +255,611 43.3% Q2 2026 Aug 06, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC History Added to 818,831 1,645 0.0% 0.0% 33 +31,423 3.99% Q2 2026 Aug 14, 2026
NORTHERN TRUST CORP History Added to 773,462 1,554 0.0% 0.0% 34 +81,206 11.73% Q2 2026 Aug 13, 2026
VANGUARD FIDUCIARY TRUST CO History Added to 663,592 1,333 0.0% 0.0% 35 +85,653 14.82% Q2 2026 Aug 13, 2026
MARSHALL WACE, LLP History Reduced 598,559 1,203 0.0% 0.0% 36 -21,865 -3.52% Q2 2026 Aug 13, 2026
BOOTHBAY FUND MANAGEMENT, LLC History Reduced 532,850 1,071 0.01% 0.02% 37 -26,876 -4.8% Q2 2026 Aug 14, 2026
CITADEL ADVISORS LLC History Added to 500,132 1,005 0.0% 0.0% 38 +390,887 357.81% Q2 2026 Sep 02, 2026
GOLDMAN SACHS GROUP INC History Reduced 433,875 872 0.0% 0.0% 39 -170,687 -28.23% Q2 2026 Aug 14, 2026
XTX Topco Ltd History Reduced 399,681 803 0.01% 0.02% 40 -160,215 -28.62% Q2 2026 Aug 14, 2026
CANTOR FITZGERALD, L. P. History New 295,492 593 0.01% 41 +295,492 New Q2 2026 Aug 14, 2026
UBS Group AG History Added to 273,780 550 0.0% 0.0% 42 +128,436 88.37% Q2 2026 Aug 13, 2026
Invesco Ltd. History Reduced 257,139 516 0.0% 0.0% 43 -7,928 -2.99% Q2 2026 Aug 14, 2026
Bank of New York Mellon Corp History Reduced 250,093 502 0.0% 0.0% 44 -2,204 -0.87% Q2 2026 Aug 06, 2026
AMERIPRISE FINANCIAL INC History Reduced 224,530 451 0.0% 0.0% 45 -46,742 -17.23% Q2 2026 Aug 14, 2026
LMR Partners LLP History New 200,000 402 0.0% 47 +200,000 New Q2 2026 Aug 14, 2026
NANO CAP NEW MILLENNIUM GROWTH FUND L P History No change 200,000 402 0.31% 0.4% 46 0 0.0% Q2 2026 Aug 14, 2026
Nuveen, LLC History Added to 176,234 354 0.0% 0.0% 48 +21,304 13.75% Q2 2026 Aug 11, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History Reduced 172,423 346 0.0% 0.0% 49 -96,874 -35.97% 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 Reduced 142,678 286 0.0% 0.0% 51 -238,230 -62.54% 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 Reduced 131,300 263 0.0% 0.0% 53 -51,900 -28.33% Q2 2026 Aug 14, 2026
MORGAN STANLEY History Reduced 120,480 242 0.0% 0.0% 54 -244,087 -66.95% Q2 2026 Aug 13, 2026
JANE STREET GROUP, LLC History Reduced 120,100 241 0.0% 0.0% 55 -311,164 -72.15% Q2 2026 Aug 14, 2026
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO History Reduced 119,769 240 0.0% 0.0% 56 -16,231 -11.93% Q2 2026 Aug 17, 2026
ALLIANCEBERNSTEIN L.P. History Added to 108,940 234 0.0% 0.0% 57 +16,000 17.22% Q2 2026 Aug 14, 2026
RHUMBLINE ADVISERS History Added to 109,532 220 0.0% 0.0% 58 +8,205 8.1% Q2 2026 Aug 11, 2026
STRS OHIO History Added to 101,600 204 0.0% 0.0% 59 +15,100 17.46% Q2 2026 Jul 30, 2026
Russell Investments Group, Ltd. History Added to 98,496 197 0.0% 0.0% 60 +32,365 48.94% Q2 2026 Aug 06, 2026
WELLS FARGO & COMPANY/MN History Added to 89,172 179 0.0% 0.0% 61 +54,646 158.27% Q2 2026 Aug 14, 2026
SIMPLEX TRADING, LLC History Added to 85,488 171 0.0% 0.0% 62 +17,011 24.84% Q2 2026 Aug 12, 2026
PRICE T ROWE ASSOCIATES INC /MD/ History Added to 81,655 165 0.0% 0.0% 63 +25,555 45.55% Q2 2026 Aug 14, 2026
Blackstone Inc. History No change 77,145 155 0.0% 0.0% 64 0 0.0% Q2 2026 Aug 14, 2026
Jasper Ridge Partners, L.P. History No change 73,531 147 0.0% 0.0% 65 0 0.0% Q2 2026 Aug 14, 2026
SEI INVESTMENTS CO History Added to 71,151 143 0.0% 0.0% 66 +17,305 32.14% 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% 67 0 0.0% Q2 2026 Aug 14, 2026
Verdad Advisers, LP History Added to 60,509 121 0.12% 0.06% 69 +36,955 156.89% Q2 2026 Aug 14, 2026
IEQ CAPITAL, LLC History Added to 60,570 121 0.0% 0.0% 68 +13,490 28.65% Q2 2026 Aug 11, 2026
MetLife Investment Management, LLC History Added to 58,696 117 0.0% 0.0% 70 +22,488 62.11% Q2 2026 Aug 13, 2026
Mariner, LLC History Added to 52,709 105 0.0% 0.0% 71 +33,910 180.38% Q2 2026 Aug 13, 2026
Vanguard Personalized Indexing Management, LLC History Reduced 49,445 99 0.0% 0.0% 72 -1,184 -2.34% Q2 2026 Aug 11, 2026
HSBC HOLDINGS PLC History No change 48,523 98 0.0% 0.0% 73 0 0.0% Q2 2026 Aug 14, 2026
Graham Capital Management, L.P. History New 46,496 93 0.0% 75 +46,496 New Q2 2026 Aug 14, 2026
CITIGROUP INC History Added to 46,275 93 0.0% 0.0% 74 +41,636 897.52% Q2 2026 Aug 03, 2026
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. History Added to 45,190 90 0.0% 0.0% 77 +2,529 5.93% Q2 2026 Aug 14, 2026
BARCLAYS PLC History Added to 44,957 90 0.0% 0.0% 76 +2,366 5.56% Q2 2026 Aug 14, 2026
JPMORGAN CHASE & CO History Added to 42,998 89 0.0% 0.0% 78 +5,619 15.03% Q2 2026 Aug 12, 2026
Diversified Trust Co History Added to 42,351 85 0.0% 0.0% 79 +16,456 63.55% Q2 2026 Jul 17, 2026
DIMENSIONAL FUND ADVISORS LP History Reduced 33,728 68 0.0% 0.0% 80 -250,089 -88.12% Q2 2026 Aug 11, 2026
Cerity Partners LLC History Added to 32,521 65 0.0% 0.0% 81 +5,545 20.56% Q2 2026 Aug 14, 2026
CWM, LLC History No change 28,985 62 0.0% 0.0% 82 0 0.0% Q1 2026 May 14, 2026
Vanguard Global Advisers, LLC History No change 31,302 62 0.0% 0.0% 83 0 0.0% Q2 2026 Aug 13, 2026
Cannell & Spears LLC History Reduced 30,342 60 0.0% 0.0% 84 -24,300 -44.47% Q2 2026 Aug 11, 2026
Vontobel Holding Ltd. History No change 30,000 60 0.0% 0.0% 85 0 0.0% Q2 2026 Aug 03, 2026
Point72 Asset Management, L.P. History Reduced 26,699 53 0.0% 0.0% 87 -53,392 -66.66% Q2 2026 Aug 14, 2026
ROYAL BANK OF CANADA History Added to 26,122 53 0.0% 0.0% 86 +19,075 270.68% Q2 2026 Aug 14, 2026
MERCER GLOBAL ADVISORS INC /ADV History New 25,504 51 0.0% 88 +25,504 New Q2 2026 Aug 19, 2026
GROUP ONE TRADING LLC History New 25,208 50 0.0% 89 +25,208 New Q2 2026 Aug 13, 2026
INTECH INVESTMENT MANAGEMENT LLC History Added to 24,530 49 0.0% 0.0% 90 +576 2.4% Q2 2026 Aug 10, 2026
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC History Added to 30,251 48 0.0% 0.0% 91 +12,054 66.24% Q2 2026 Jul 15, 2026
Police & Firemen's Retirement System of New Jersey History No change 23,426 47 0.0% 0.0% 92 0 0.0% Q2 2026 Jul 23, 2026
VOYA INVESTMENT MANAGEMENT LLC History Added to 21,898 44 0.0% 0.0% 93 +6,420 41.48% Q2 2026 Aug 12, 2026
BNP PARIBAS FINANCIAL MARKETS History Added to 21,200 42 0.0% 0.0% 94 +1,173 5.86% Q2 2026 Aug 13, 2026
MANUFACTURERS LIFE INSURANCE COMPANY, THE History Reduced 19,397 38 0.0% 0.0% 95 -6,751 -25.82% Q2 2026 Sep 09, 2026
Qube Research & Technologies Ltd History New 16,569 33 0.0% 96 +16,569 New Q2 2026 Aug 14, 2026
PRUDENTIAL FINANCIAL INC History Reduced 16,015 32 0.0% 0.0% 97 -7,780 -32.7% Q2 2026 Aug 12, 2026
CAPTRUST FINANCIAL ADVISORS History Added to 16,037 32 0.0% 0.0% 98 +5,389 50.61% Q2 2026 Aug 13, 2026
Creative Planning History New 15,015 30 0.0% 99 +15,015 New Q2 2026 Aug 13, 2026
Tower Research Capital LLC (TRC) History Added to 14,450 29 0.0% 0.0% 100 +8,507 143.14% Q2 2026 Aug 11, 2026
Quadrature Capital Ltd History Reduced 14,169 28 0.0% 0.0% 102 -5,317 -27.29% Q2 2026 Aug 06, 2026
HAMILTON LANE ADVISORS LLC History No change 14,400 28 0.02% 0.02% 101 0 0.0% Q2 2026 Jul 13, 2026
Neuberger Berman Group LLC History Reduced 13,521 27 0.0% 0.0% 103 -1,007 -6.93% Q2 2026 Aug 13, 2026
ProShare Advisors LLC History Reduced 12,848 25 0.0% 0.0% 104 -340 -2.58% Q2 2026 Aug 11, 2026
Bronte Capital Management Pty Ltd. History Reduced 11,758 23 0.0% 0.0% 105 -7,524 -39.02% Q2 2026 Aug 04, 2026
Merit Financial Group, LLC History Added to 11,243 22 0.0% 0.0% 106 +315 2.88% Q2 2026 Jul 20, 2026
HighTower Advisors, LLC History Reduced 10,227 20 0.0% 0.0% 108 -533 -4.95% Q2 2026 Aug 05, 2026
NEW YORK STATE COMMON RETIREMENT FUND History No change 10,310 20 0.0% 0.0% 107 0 0.0% Q2 2026 Jul 29, 2026
Legal & General Group Plc History No change 8,346 16 0.0% 0.0% 109 0 0.0% Q2 2026 Aug 14, 2026
Ameritas Investment Partners, Inc. History No change 8,175 16 0.0% 0.0% 110 0 0.0% Q2 2026 Aug 13, 2026
Arax Advisory Partners History Added to 5,433 10 0.0% 111 +5,254 2935.2% Q2 2026 Aug 10, 2026
China Universal Asset Management Co., Ltd. History New 3,600 7 0.0% 112 +3,600 New Q2 2026 Jul 24, 2026
Allworth Financial LP History Added to 2,479 4 0.0% 0.0% 113 +1,852 295.37% Q2 2026 Aug 11, 2026
GAMMA Investing LLC History No change 1,523 3 0.0% 0.0% 114 0 0.0% Q2 2026 Jul 07, 2026
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM History Reduced 1,274 2 0.0% 0.0% 116 -3,620 -73.97% Q2 2026 Aug 24, 2026
Essential Partners LLC History Reduced 1,237 2 0.0% 0.0% 118 -2,620 -67.93% Q2 2026 Aug 10, 2026
EverSource Wealth Advisors, LLC History Added to 1,309 2 0.0% 0.0% 117 +422 47.58% Q2 2026 Jul 24, 2026
NISA INVESTMENT ADVISORS, LLC History Added to 1,416 2 0.0% 0.0% 115 +400 39.37% Q2 2026 Aug 10, 2026
Sterling Capital Management LLC History Reduced 523 1 0.0% 0.0% 120 -2,283 -81.36% Q2 2026 Jul 28, 2026
Optiver Holding B.V. History Reduced 925 1 0.0% 0.0% 122 -776 -45.62% Q2 2026 Aug 12, 2026
ROTHSCHILD INVESTMENT LLC History Added to 680 1 0.0% 119 +440 183.33% Q2 2026 Aug 06, 2026
True Wealth Design, LLC History Added to 867 1 0.0% 0.0% 123 +274 46.21% Q2 2026 Jul 16, 2026
Physician Wealth Advisors, Inc. History No change 752 1 0.0% 0.0% 121 0 0.0% Q2 2026 Jul 20, 2026
Foresite Capital Management IV, LLC History Closed out 0 0 3.52% -3,887,200 -100.0% Q2 2026 Aug 14, 2026
Odyssean, LLC History Closed out 0 0 0.07% -89,783 -100.0% Q2 2026 Aug 14, 2026
GSA CAPITAL PARTNERS LLP History Closed out 0 0 0.01% -78,207 -100.0% Q2 2026 Aug 06, 2026
State of Wyoming History Closed out 0 0 0.0% -1,645 -100.0% Q2 2026 Aug 06, 2026
Root Financial Partners, LLC History Closed out 0 0 -305 -100.0% Q2 2026 Jul 29, 2026
OSAIC HOLDINGS, INC. History New 300 0 +300 New Q2 2026 Aug 14, 2026
Advisory Services Network, LLC History Closed out 0 0 -271 -100.0% Q2 2026 Aug 12, 2026
Clearstead Advisors, LLC History New 125 0 +125 New Q2 2026 Aug 06, 2026
Fortitude Family Office, LLC History Reduced 134 0 -121 -47.45% Q2 2026 Jul 20, 2026
Basecamp Wealth Advisors LLC History Added to 446 0 +117 35.56% Q2 2026 Aug 14, 2026
Wealth Enhancement Trust Services, Inc. History New 105 0 +105 New Q2 2026 Jul 22, 2026
Farther Finance Advisors, LLC History Added to 253 0 +97 62.18% Q2 2026 Jul 17, 2026
IFP Advisors, Inc History Added to 94 0 +88 1466.67% Q2 2026 Jul 20, 2026
MAI Capital Management History Closed out 0 0 -67 -100.0% Q2 2026 Aug 14, 2026
Lloyd Advisory Services, LLC. History Closed out 0 0 -48 -100.0% Q2 2026 Aug 07, 2026
SJS Investment Consulting Inc. History New 43 0 +43 New Q2 2026 Jul 22, 2026
Caitong International Asset Management Co., Ltd History Added to 42 0 +40 2000.0% Q2 2026 Aug 04, 2026
Hughes Financial Services, LLC History Reduced 388 0 -24 -5.83% Q2 2026 Jul 20, 2026
JPL Wealth Management, LLC History New 18 0 +18 New Q2 2026 Aug 13, 2026
FIFTH THIRD BANCORP History No change 6 0 0 0.0% Q2 2026 Aug 05, 2026
Wilmington Savings Fund Society, FSB History No change 400 0 0 0.0% Q2 2026 Jul 28, 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
Sunbelt Securities, Inc. History No change 17 0 0 0.0% Q1 2026 May 15, 2026
Rockefeller Capital Management L.P. History No change 367 0 0 0.0% Q2 2026 Aug 13, 2026
SBI Securities Co., Ltd. History No change 20 0 0 0.0% Q2 2026 Jul 22, 2026
Kingdom Financial Group LLC. History No change 48 0 0 0.0% Q2 2026 Aug 07, 2026
Federation des caisses Desjardins du Quebec History No change 415 0 0 0.0% Q2 2026 Aug 13, 2026