13F

Stock

Alector, Inc.

ALEC · held by 137 managers

Reported value

$181M

Holders

137

+25 new · −20 exited

Holders’ est. mark

$40.1M

Price effect on 108 books still in the name

Largest holder

$21.5M

TCG Crossover Management, LLC

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
TCG Crossover Management, LLC10M$21.5M$5.9MAdded$5.9M
BlackRock, Inc.7.74M$16.6M$4.22MAdded$5.49M
Foresite Capital Management IV, LLC3.89M$8.36M$2.29MAdded$2.29M
VANGUARD CAPITAL MANAGEMENT LLC3.68M$7.91MHeld
Merck & Co., Inc.3.55M$7.62M$2.09MAdded$2.09M
D. E. Shaw & Co., Inc.3.33M$7.17M$1.4MAdded$3.48M
683 Capital Management, LLC3.2M$6.88M$1.89MAdded$1.65M
Balyasny Asset Management L.P.2.94M$6.31M$1.73MAdded$1.22M
Nantahala Capital Management, LLC2.82M$6.05MNew
VANGUARD PORTFOLIO MANAGEMENT LLC2.58M$5.55MHeld
GEODE CAPITAL MANAGEMENT, LLC2.29M$4.92M$1.22MAdded$1.68M
JACOBS LEVY EQUITY MANAGEMENT, INC2.15M$4.63M$1.27MAdded$1.24M
Spruce Street Capital LP2.1M$4.52M$659.6KAdded$2.77M
Ikarian Capital, LLC2.08M$4.48M$1.23MAdded$1.23M
Kynam Capital Management, LP2M$4.3M$1.18MAdded$1.18M
MILLENNIUM MANAGEMENT LLC1.98M$4.26M$786.4KAdded$2.18M
State Street1.87M$4.01M$1.07MAdded$1.18M
Fidelity1.8M$3.86M$1.06MAdded$381K
MEDICI CAPITAL LLC1.65M$3.55M$885.3KAdded$1.21M
Eversept Partners, LP1.35M$2.9M$593.6KAdded$1.34M
Euclidean Capital LLC1.31M$2.81M$771.6KAdded$771.6K
Renaissance Technologies1.29M$2.77M$759.7KAdded$360.4K
TWO SIGMA INVESTMENTS, LP1.28M$2.75M$613.4KAdded$1.13M
DEUTSCHE BANK AG\1.09M$2.35M$610.7KAdded$734.9K
DEERFIELD MANAGEMENT COMPANY, L.P.1.06M$2.27M$622.6KAdded$622.6K
ADAR1 Capital Management, LLC1.05M$2.26M$619.5KAdded$529K
DAFNA Capital Management LLC908.4K$1.95M$535.9KAdded$535.9K
Elmind Capital, LP900K$1.94M$531KAdded$531K
MACKENZIE FINANCIAL CORP857.4K$1.84M$417.9KAdded$841.8K
CHARLES SCHWAB INVESTMENT MANAGEMENT INC787.4K$1.69M$392.6KAdded$654.8K
Icahn Capital711.3K$1.53M$353.7KAdded$594K
NORTHERN TRUST CORP692.3K$1.49M$346.7KAdded$571.6K
MARSHALL WACE, LLP620.4K$1.33M$366.1KCut−$486.3K
GOLDMAN SACHS GROUP INC604.6K$1.3M$258.4KAdded$616.6K
PANAGORA ASSET MANAGEMENT INC590.4K$1.27M$348.3KCut−$57.1K
VANGUARD FIDUCIARY TRUST CO577.9K$1.24MHeld
XTX Topco Ltd559.9K$1.2M$330.3KAdded$278.9K
BOOTHBAY FUND MANAGEMENT, LLC559.7K$1.2M$330.2KAdded$330.2K
Affinity Asset Advisors, LLC500K$1.07MNew
JANE STREET GROUP, LLC399.5K$858.8K$235.7KCut−$691.7K
BANK OF AMERICA CORP /DE/380.9K$819K$79.4KAdded$609.1K
MORGAN STANLEY364.6K$783.8K$188.3KAdded$286.1K
DIMENSIONAL FUND ADVISORS LP283.8K$609.8K$117.3KAdded$299.3K
AMERIPRISE FINANCIAL INC271.3K$583.2K$160KAdded$30.5K
Invesco Ltd.265.1K$569.9K$156.4KAdded$133.9K
Bank of New York Mellon Corp252.3K$542.4K$128.5KAdded$202.6K
NANO CAP NEW MILLENNIUM GROWTH FUND L P200K$430K$118KAdded$118K
CANADA PENSION PLAN INVESTMENT BOARD183.2K$393.9K$101.7KAdded$125.1K
Nuveen, LLC154.9K$333.1K$78.6KAdded$125.2K
Utah Retirement Systems154.3K$331.7K$78.9KAdded$123.1K
UBS Group AG145.3K$312.5K$70.5KAdded$126.2K
BRIDGEWAY CAPITAL MANAGEMENT, LLC142.5K$306.4K$67.8KAdded$127K
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO136K$292.4K$80.2KAdded$80.2K
SUSQUEHANNA INTERNATIONAL GROUP, LLP107.6K$231.3K$63.5KCut−$222.9K
RHUMBLINE ADVISERS101.3K$217.8K$59.8KAdded$58.9K
Odyssean, LLC89.8K$193KNew
STRS OHIO86.5K$186K$51KAdded$13.8K
Point72 Asset Management, L.P.80.1K$172.2K$13.6KAdded$136.2K
Citadel77.5K$166.7K$45.8KAdded$20.8K
Blackstone Inc.77.1K$165.9K$39.4KAdded$61.6K
Jasper Ridge Partners, L.P.73.5K$158.1K$43.4KAdded$9.79K
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main69.7K$149.8KNew
SIMPLEX TRADING, LLC68.5K$147.2K$40.4KAdded$19.3K
ALLIANCEBERNSTEIN L.P.92.9K$145K$0Held
Russell Investments Group, Ltd.66.1K$142.2K$39KAdded$30K
Cannell & Spears LLC54.6K$117.5K$32.2KAdded$32.2K
SEI INVESTMENTS CO53.8K$115.8K$9.96KAdded$89.4K
Vanguard Personalized Indexing Management, LLC50.6K$108.9K$29.9KAdded$26.1K
HSBC HOLDINGS PLC48.5K$104.8K$29.1KAdded$29.1K
IEQ CAPITAL, LLC47.1K$101.2KNew
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.42.7K$91.7K$22KAdded$33.6K
BARCLAYS PLC42.6K$91.6K$25.1KCut−$530.4K
MetLife Investment Management, LLC36.2K$77.8KNew
JPMORGAN CHASE & CO37.4K$75.5K$15KAdded$24.6K
WELLS FARGO & COMPANY/MN34.5K$74.2K$20.4KCut−$66.3K
Vanguard Global Advisers, LLC31.3K$67.3KHeld
Vontobel Holding Ltd.30K$64.5K$17.7KAdded$17.7K
CWM, LLC29K$62.3K$26.1KAdded$62.3K
Cerity Partners LLC27K$58K$8.07KAdded$36.7K
MANUFACTURERS LIFE INSURANCE COMPANY, THE26.1K$56.2K$15.4KAdded$11.2K
DIVERSIFIED TRUST CO25.9K$55.7K$8.32KAdded$33.7K
INTECH INVESTMENT MANAGEMENT LLC24K$51.5K$14.1KCut−$2.33K
PRUDENTIAL FINANCIAL INC23.8K$51.2K$14KAdded$888
Verdad Advisers, LP23.6K$50.6KNew
Police & Firemen's Retirement System of New Jersey23.4K$50.4K$13.8KAdded$13.8K
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC18.2K$43.9KNew
BNP PARIBAS FINANCIAL MARKETS20K$43.1K$11.8KAdded$8.14K
Quadrature Capital Ltd19.5K$41.9K$11.5KCut−$55.3K
Bronte Capital Management Pty Ltd.19.3K$41.5K$11.4KAdded$11.4K
Mariner, LLC18.8K$40.4KNew
VOYA INVESTMENT MANAGEMENT LLC15.5K$33.3K$8.22KAdded$11.5K
NEUBERGER BERMAN GROUP LLC14.5K$31.2K$8.36KAdded$9.13K
HAMILTON LANE ADVISORS LLC14.4K$31KNew
ProShare Advisors LLC13.2K$28.4K$7.78KAdded$5.46K
Merit Financial Group, LLC10.9K$23.5KNew
HighTower Advisors, LLC10.8K$23.1K$5.91KAdded$7.52K
CAPTRUST FINANCIAL ADVISORS10.6K$22.9KNew
NEW YORK STATE COMMON RETIREMENT FUND10.3K$22.2K$6.08KAdded$6.08K
Legal & General Group Plc8.35K$17.9K$3.56KAdded$8.52K
Ameritas Investment Partners, Inc.8.18K$17.6K$4.82KAdded$4.82K
ROYAL BANK OF CANADA7.05K$15K$2.96KAdded$8K
Tower Research Capital LLC (TRC)5.94K$12.8K$3.51KCut−$48.9K
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM4.89K$10.5K$2.89KAdded$2.82K
CITIGROUP INC4.64K$9.97K$2.74KAdded$372
ACADIAN ASSET MANAGEMENT LLC4.04M$8.68K$2.03KAdded$3.31K
Essential Partners LLC3.86K$8.29K$255Added$7.62K
Sterling Capital Management LLC2.81K$6.03K$1.66KCut−$864
Optiver Holding B.V.1.7K$3.66KNew
State of Wyoming1.65K$3.54KNew
GAMMA Investing LLC1.52K$3.27K$634Added$1.6K
NISA INVESTMENT ADVISORS, LLC1.02K$2.18K$599Added$599
EverSource Wealth Advisors, LLC887$1.91K$298Added$1.12K
Physician Wealth Advisors, Inc.752$1.62K$443Added$443
Allworth Financial LP627$1.35KNew
True Wealth Design, LLC593$1.27K$331Added$396
Federation des caisses Desjardins du Quebec415$892$245Added$245
Hughes Financial Services, LLC412$886$243Added$23
Wilmington Savings Fund Society, FSB400$860$236Added$236
Rockefeller Capital Management L.P.367$789$216Added$216
MARK SHEPTOFF FINANCIAL PLANNING, LLC300$771$303Added$303
Root Financial Partners, LLC305$656New
Advisory Services Network, LLC271$583New
Fortitude Family Office, LLC255$548New
ROTHSCHILD INVESTMENT LLC240$516$123Added$190
NATIONAL BANK OF CANADA /FI/200$430$118Added$118
Farther Finance Advisors, LLC156$395New
Arax Advisory Partners179$385New
GSA CAPITAL PARTNERS LLP78.2K$168$46Cut−$184
MAI Capital Management67$145New
PRICE T ROWE ASSOCIATES INC /MD/56.1K$121$32Added$32
Kingdom Financial Group LLC.48$103$28Added$28
Lloyd Advisory Services, LLC.48$103New
SBI Securities Co., Ltd.20$43$12Added$12
Sunbelt Securities, Inc.17$37New
IFP Advisors, Inc6$13$4Cut−$60
FIFTH THIRD BANCORP6$13New
Caitong International Asset Management Co., Ltd2$4New

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.