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ALEC · Alector, Inc.

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$1.52 +0.00 (+0.00%) At close · Jul 29
Market Cap
$168.76M
Shares
111.03M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 139
Total Value: $185,026,943
Total Shares: 86,068,327
Showing 1–100 of 142 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 137 13F filers
Top Holder
11.6%
Jun 2023 → Mar 2026 · range 11.6% – 21.3%
of institutional value
Top 5
34.1%
Jun 2023 → Mar 2026 · range 34.1% – 58.0%
of institutional value
Top 10
52.5%
Jun 2023 → Mar 2026 · range 52.5% – 71.8%
of institutional value
HHI
417
Jun 2023 → Mar 2026 · range 417 – 857
Broadly held
Showing 100 of 142
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mid TCG Crossover Management, LLC $21,500,000 11.62% 10,000,000
Mega BlackRock, Inc. $16,643,672 9.00% 7,741,245
Large ACADIAN ASSET MANAGEMENT LLC $8,683,387 4.69% 4,038,785
Small Foresite Capital Management IV, LLC $8,357,480 4.52% 3,887,200
Mega VANGUARD CAPITAL MANAGEMENT LLC $7,909,252 4.27% 3,678,722
Small Merck & Co., Inc. $7,623,295 4.12% 3,545,719
Mega D. E. Shaw & Co., Inc. $7,165,594 3.87% 3,332,835
Mid 683 Capital Management, LLC $6,880,000 3.72% 3,200,000
Large Balyasny Asset Management L.P. $6,310,793 3.41% 2,935,253
Mid Nantahala Capital Management, LLC $6,054,363 3.27% 2,815,983
Mega GEODE CAPITAL MANAGEMENT, LLC $4,915,368 2.66% 2,286,218
Large JACOBS LEVY EQUITY MANAGEMENT, INC $4,631,876 2.50% 2,154,361
Small Spruce Street Capital LP $4,517,296 2.44% 2,101,068
Mid Ikarian Capital, LLC $4,477,602 2.42% 2,082,606
Mid Kynam Capital Management, LP $4,300,000 2.32% 2,000,000
Mega MILLENNIUM MANAGEMENT LLC $4,255,335 2.30% 1,979,226
Mega STATE STREET CORP $4,010,880 2.17% 1,865,526
Mega FMR LLC $3,861,623 2.09% 1,796,104
Micro MEDICI CAPITAL LLC $3,552,918 1.92% 1,652,520
Mid Eversept Partners, LP $2,904,877 1.57% 1,351,106
Micro Euclidean Capital LLC $2,811,894 1.52% 1,307,858
Large RENAISSANCE TECHNOLOGIES LLC $2,768,535 1.50% 1,287,691
Mega TWO SIGMA INVESTMENTS, LP $2,750,507 1.49% 1,279,306
Mega DEUTSCHE BANK AG\ Bank $2,349,741 1.27% 1,092,903
Mid DEERFIELD MANAGEMENT COMPANY, L.P. $2,268,662 1.23% 1,055,192
Mid ADAR1 Capital Management, LLC $2,257,500 1.22% 1,050,000
Small DAFNA Capital Management LLC $1,952,954 1.06% 908,351
Small Elmind Capital, LP $1,935,000 1.05% 900,000
Large MACKENZIE FINANCIAL CORP $1,843,311 1.00% 857,354
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $1,692,927 0.91% 787,408
Mega AQR CAPITAL MANAGEMENT LLC $1,529,365 0.83% 711,334
Mega NORTHERN TRUST CORP Bank $1,488,349 0.80% 692,256
Large MARSHALL WACE, LLP $1,333,911 0.72% 620,424
Mega GOLDMAN SACHS GROUP INC $1,299,807 0.70% 604,562
Large PANAGORA ASSET MANAGEMENT INC $1,269,334 0.69% 590,388
Mega VANGUARD FIDUCIARY TRUST CO Bank $1,242,568 0.67% 577,939
Mid XTX Topco Ltd $1,203,776 0.65% 559,896
Mid BOOTHBAY FUND MANAGEMENT, LLC $1,203,410 0.65% 559,726
Mid Affinity Asset Advisors, LLC $1,075,000 0.58% 500,000
Mega JANE STREET GROUP, LLC $858,847 0.46% 399,464
Mega BANK OF AMERICA CORP /DE/ Bank $818,951 0.44% 380,908
Mega MORGAN STANLEY $783,815 0.42% 364,567
Mega DIMENSIONAL FUND ADVISORS LP $610,206 0.33% 283,817
Mega AMERIPRISE FINANCIAL INC $583,234 0.32% 271,272
Mega Invesco Ltd. $569,893 0.31% 265,067
Mega Bank of New York Mellon Corp Bank $542,437 0.29% 252,297
Micro NANO CAP NEW MILLENNIUM GROWTH FUND L P $430,000 0.23% 200,000
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $393,880 0.21% 183,200
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $347,655 0.19% 161,700
Mega Nuveen, LLC $333,098 0.18% 154,930
Mid Utah Retirement Systems Pension $331,723 0.18% 154,290
Mega UBS Group AG $312,489 0.17% 145,344
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $306,375 0.17% 142,500
Large PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO Pension $292,400 0.16% 136,000
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $231,333 0.13% 107,597
Mega RHUMBLINE ADVISERS $217,853 0.12% 101,327
Mega ALLIANCEBERNSTEIN L.P. $199,821 0.11% 92,940
Small Odyssean, LLC $193,033 0.10% 89,783
Large STRS OHIO $185,975 0.10% 86,500
Large Point72 Asset Management, L.P. $172,195 0.09% 80,091
Mid GSA CAPITAL PARTNERS LLP $168,145 0.09% 78,207
Mega CITADEL ADVISORS LLC $166,720 0.09% 77,545
Large Blackstone Inc. $165,861 0.09% 77,145
Small Jasper Ridge Partners, L.P. $158,091 0.09% 73,531
Mega DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main Bank $149,781 0.08% 69,666
Mid SIMPLEX TRADING, LLC $147,225 0.08% 68,477
Large Russell Investments Group, Ltd. $142,179 0.08% 66,131
Mega PRICE T ROWE ASSOCIATES INC /MD/ $120,615 0.07% 56,100
Mid Cannell & Spears LLC $117,480 0.06% 54,642
Large SEI INVESTMENTS CO $115,768 0.06% 53,846
Mid Vanguard Personalized Indexing Management, LLC $108,852 0.06% 50,629
Mega HSBC HOLDINGS PLC $104,324 0.06% 48,523
Large IEQ CAPITAL, LLC $101,222 0.05% 47,080
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $91,721 0.05% 42,661
Mega BARCLAYS PLC $91,570 0.05% 42,591
Mid Diversified Trust Co Bank $85,125 0.05% 42,351
Mega JPMORGAN CHASE & CO $80,364 0.04% 37,379
Large MetLife Investment Management, LLC $77,847 0.04% 36,208
Mega WELLS FARGO & COMPANY/MN $74,230 0.04% 34,526
Mega JANE STREET GROUP, LLC $68,370 0.04% 31,800
Mega CITADEL ADVISORS LLC $68,155 0.04% 31,700
Mega Vanguard Global Advisers, LLC $67,299 0.04% 31,302
Large Vontobel Holding Ltd. $64,500 0.03% 30,000
Large CWM, LLC $62,317 0.03% 28,985
Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC $60,804 0.03% 30,251
Large Cerity Partners LLC $57,997 0.03% 26,976
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $56,218 0.03% 26,148
Mid INTECH INVESTMENT MANAGEMENT LLC $51,501 0.03% 23,954
Large PRUDENTIAL FINANCIAL INC $51,159 0.03% 23,795
Micro Verdad Advisers, LP $50,641 0.03% 23,554
Large Police & Firemen's Retirement System of New Jersey Pension $47,086 0.03% 23,426
Mega BNP PARIBAS ARBITRAGE, SA $43,058 0.02% 20,027
Mid Quadrature Capital Ltd $41,894 0.02% 19,486
Small Bronte Capital Management Pty Ltd. $41,456 0.02% 19,282
Large Mariner, LLC $40,417 0.02% 18,799
Large VOYA INVESTMENT MANAGEMENT LLC $33,277 0.02% 15,478
Mega NEUBERGER BERMAN GROUP LLC $31,235 0.02% 14,528
Small HAMILTON LANE ADVISORS LLC $28,944 0.02% 14,400
Large ProShare Advisors LLC $28,354 0.02% 13,188
Large HighTower Advisors, LLC $23,134 0.01% 10,760
Key facts CIK 1653087 CUSIP 014442107 13F (30d) 20 filings 20 filers Visit website Investor relations

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