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Disclosery

ALEC ALECTOR INC

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COMMON STOCK (common), issuer CIK 1653087

134 managers (138 13F filers) reported a position in ALEC shares at 2026-03-31, 88,395,948 shares in all. 25 filers opened a position and 20 filers sold out during the quarter.

Managers
134
13F filers
138
New
25
Added
44
Reduced
36
Sold out
20
Shares held by filers
88,395,948

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
TCG Crossover Management, LLC10,000,000$21.5M0.62%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.7,741,245$16.6M<0.01%+593,47913F-HRTimelineGroup
VANGUARD GROUP INCgroup of 5 filers holding6,922,134$14.9M+6,869,078Timeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC4,038,785$8.68M0.01%+596,33613F-HRTimelineGroup
Foresite Capital Management IV, LLCin group Foresite Capital Management V…3,887,200$8.36M3.53%013F-HRTimelineGroup
Merck & Co., Inc.in group Merck & Co., Inc.3,545,719$7.62M2.18%013F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.3,332,835$7.17M0.01%+967,68413F-HRTimelineGroup
683 Capital Management, LLCin group 683 Capital Management, LLC3,200,000$6.88M0.64%-150,00013F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management2,935,253$6.31M0.01%-330,32213F-HRTimelineGroup
Nantahala Capital Management, LLCin group Nantahala Capital Management,…2,815,983$6.05M0.38%new13F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC2,286,218$4.92M<0.01%+210,99813F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC2,154,361$4.63M0.02%-18,84113F-HRTimeline
Spruce Street Capital LP2,101,068$4.52M1.09%+983,08213F-HRTimeline
Ikarian Capital, LLCin group Ikarian Capital, LLC2,082,606$4.48M0.64%013F-HRTimelineGroup
Kynam Capital Management, LP2,000,000$4.3M0.27%013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC1,979,226$4.26M<0.01%+646,31213F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP1,865,526$4.01M<0.01%+51,22813F-HRTimelineGroup
FMR LLCin group FMR LLC1,796,104$3.86M<0.01%-435,06713F-HRTimelineGroup
MEDICI CAPITAL LLC1,652,520$3.55M4.97%+152,00013F-HRTimeline
Eversept Partners, LP1,351,106$2.9M0.19%+344,94313F-HRTimeline
Euclidean Capital LLC1,307,858$2.81M0.72%013F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC1,287,691$2.77M<0.01%-255,95913F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP1,279,306$2.75M<0.01%+239,65013F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\1,092,903$2.35M<0.01%+57,74913F-HRTimelineGroup
DEERFIELD MANAGEMENT COMPANY, L.P.in group DEERFIELD MANAGEMENT COMPANY,…1,055,192$2.27M0.03%013F-HRTimelineGroup
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC1,050,000$2.26M0.14%-58,00013F-HRTimelineGroup
DAFNA Capital Management LLC908,351$1.95M0.44%013F-HRTimeline
Elmind Capital, LP900,000$1.94M0.55%013F-HRTimeline
MACKENZIE FINANCIAL CORP857,354$1.84M<0.01%+197,18613F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co787,408$1.69M<0.01%+121,91713F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC711,334$1.53M<0.01%+111,76513F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP692,256$1.49M<0.01%+104,60313F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP620,424$1.33M<0.01%-546,39313F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC604,562$1.3M<0.01%+166,60313F-HRTimelineGroup
PANAGORA ASSET MANAGEMENT INC590,388$1.27M<0.01%-259,91013F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd559,896$1.2M0.02%-32,94313F-HRTimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC559,726$1.2M0.03%013F-HRTimeline
Affinity Asset Advisors, LLC500,000$1.07M0.06%new13F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC399,464$859K<0.01%-594,44913F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/380,908$819K<0.01%+246,40213F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY364,567$784K<0.01%+45,49513F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP283,817$610K<0.01%+84,69113F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC271,272$583K<0.01%-83,02713F-HR/ATimelineGroup
Invesco Ltd.in group Invesco Ltd.265,067$570K<0.01%-14,40113F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp252,297$542K<0.01%+34,43513F-HRTimelineGroup
NANO CAP NEW MILLENNIUM GROWTH FUND L P200,000$430K0.4%013F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD183,200$394K<0.01%+10,90013F-HRTimeline
Nuveen, LLCin group TIAA154,930$333K<0.01%+21,68213F-HRTimelineGroup
Utah Retirement Systems154,290$332K<0.01%+20,57213F-HRTimeline
UBS Group AGin group UBS Group AG145,344$312K<0.01%+25,93313F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC142,500$306K0.01%+27,50013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…136,000$292K<0.01%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…107,597$231K<0.01%-183,58313F-HRTimelineGroup
RHUMBLINE ADVISERS101,327$218K<0.01%-59913F-HRTimeline
Odyssean, LLC89,783$193K0.07%new13F-HRTimeline
STRS OHIO86,500$186K<0.01%-23,90013F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.80,091$172K<0.01%+56,98913F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP78,207$168K0.01%-147,35913F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC77,545$167K<0.01%-16,00213F-HRTimelineGroup
Blackstone Inc.in group Blackstone Inc.77,145$166K<0.01%+10,28613F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
Jasper Ridge Partners, L.P.73,531$158K<0.01%-21,53713F-HRTimeline
DZ BANK AG Deutsche Zentral Genossensch…in group DZ BANK AG Deutsche Zentral G…69,666$150K<0.01%new13F-HRTimelineGroup
SIMPLEX TRADING, LLC68,477$147K<0.01%-13,54013F-HRTimeline
ALLIANCEBERNSTEIN L.P.92,940$145K<0.01%013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…66,131$142K<0.01%-5,75613F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/56,100$121K<0.01%-10313F-HRTimeline
Cannell & Spears LLC54,642$117K<0.01%013F-HR/ATimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO53,846$116K<0.01%+36,96213F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC48,523$105K<0.01%+213F-HRTimelineGroup
IEQ CAPITAL, LLC47,080$101K<0.01%new13F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…42,661$91.7K<0.01%+5,39013F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC42,591$91.6K<0.01%-356,09613F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…36,208$77.8K<0.01%new13F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO37,379$75.5K<0.01%+4,75613F-HR/ATimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN34,526$74.2K<0.01%-55,58213F-HR/ATimelineGroup
Vontobel Holding Ltd.in group Vontobel Holding Ltd.30,000$64.5K<0.01%013F-HRTimelineGroup
CWM, LLCin group CWM, LLC28,985$62.3K<0.01%+16,82113F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC26,976$58K<0.01%+13,29413F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …26,148$56.2K<0.01%-2,68113F-HRTimelineGroup
DIVERSIFIED TRUST CO25,895$55.7K<0.01%+11,79313F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC23,954$51.5K<0.01%-10,55613F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC23,795$51.2K<0.01%-8,43013F-HRTimelineGroup
Verdad Advisers, LP23,554$50.6K0.06%new13F-HRTimeline
Police & Firemen's Retirement System of…23,426$50.4K<0.01%013F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…18,197$43.9K<0.01%new13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS20,027$43.1K<0.01%-2,35813F-HRTimelineGroup
Quadrature Capital Ltdin group Quadrature Capital Ltd19,486$41.9K<0.01%-42,78713F-HRTimelineGroup
Bronte Capital Management Pty Ltd.19,282$41.5K<0.01%013F-HRTimeline
Mariner, LLCin group Mariner, LLC18,799$40.4K<0.01%new13F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC15,478$33.3K<0.01%+1,54913F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC14,528$31.2K<0.01%+35513F-HRTimelineGroup
HAMILTON LANE ADVISORS LLC14,400$31K0.02%new13F-HRTimeline
ProShare Advisors LLC13,188$28.4K<0.01%-1,48413F-HRTimeline
Merit Financial Group, LLC10,928$23.5K<0.01%new13F-HRTimeline
HighTower Advisors, LLC10,760$23.1K<0.01%+74913F-HRTimeline
CAPTRUST FINANCIAL ADVISORS10,648$22.9K<0.01%new13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND10,310$22.2K<0.01%013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc8,346$17.9K<0.01%+2,30713F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…8,175$17.6K<0.01%013F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA7,047$15K<0.01%+2,36913F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…5,943$12.8K<0.01%-33,57713F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…4,894$10.5K<0.01%-4613F-HRTimeline
CITIGROUP INCin group CITIGROUP INC4,639$9.97K<0.01%-1,51613F-HRTimelineGroup
Essential Partners LLC3,857$8.29K<0.01%+3,42613F-HRTimeline
Sterling Capital Management LLC2,806$6.03K<0.01%-1,61513F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.1,701$3.66K<0.01%new13F-HR/ATimelineGroup
State of Wyoming1,645$3.54K<0.01%new13F-HRTimeline
GAMMA Investing LLC1,523$3.27K<0.01%+44813F-HRTimeline
NISA INVESTMENT ADVISORS, LLC1,016$2.18K<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…887$1.91K<0.01%+38313F-HR/ATimelineGroup
Physician Wealth Advisors, Inc.752$1.62K<0.01%013F-HRTimeline
Allworth Financial LP627$1.35K<0.01%new13F-HRTimeline
True Wealth Design, LLC593$1.27K<0.01%+3013F-HRTimeline
Federation des caisses Desjardins du Qu…415$892<0.01%013F-HRTimeline
Hughes Financial Services, LLC412$886<0.01%-14113F-HRTimeline
Wilmington Savings Fund Society, FSB400$860<0.01%013F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…367$789<0.01%013F-HRTimelineGroup
MARK SHEPTOFF FINANCIAL PLANNING, LLC300$771<0.01%013F-HRTimeline
Basecamp Wealth Advisors LLC329$707<0.01%013F-HRTimeline
Root Financial Partners, LLC305$656<0.01%new13F-HRTimeline
Advisory Services Network, LLC271$583<0.01%new13F-HRTimeline
Fortitude Family Office, LLC255$548<0.01%new13F-HRTimeline
ROTHSCHILD INVESTMENT LLC240$516<0.01%+3113F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/200$430<0.01%013F-HRTimelineGroup
Farther Finance Advisors, LLC156$395<0.01%new13F-HRTimeline
Arax Advisory Partners179$385<0.01%new13F-HRTimeline
MAI Capital Management67$145<0.01%new13F-HRTimeline
Lloyd Advisory Services, LLC.48$103<0.01%new13F-HRTimeline
Kingdom Financial Group LLC.48$103<0.01%013F-HRTimeline
SBI Securities Co., Ltd.20$43<0.01%013F-HRTimeline
Sunbelt Securities, Inc.17$37<0.01%new13F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…6$13<0.01%new13F-HRTimelineGroup
IFP Advisors, Inc6$13<0.01%-4113F-HRTimeline
Caitong International Asset Management …2$4<0.01%new13F-HRTimeline