Stock Ownership/ANNX

ANNEXON INC (ANNX): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in ANNX · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
22
13F filers
Aggregate Value
$141.3M
Across holders
Last Price
$5.06
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity8 increased14 reduced2 exited
Full exits: Magnetar Financial LLC, Man Group plc
Institutional Holders of ANNX
↗
22 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
Woodline Partners LP
CIK 0001784547
Hedge Fund6.93M$39.5M28.0%0.1%Added+$26.2MQ2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
Hedge Fund3.50M$20.0M14.1%0.0%Reduced$-4.6MQ2 2026
BALYASNY ASSET MANAGEMENT LLC
CIK 0001218710
Hedge Fund2.83M$16.2M11.4%0.0%Reduced$-6.0MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund2.75M$15.7M11.1%0.0%Reduced$-2.1MQ2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund1.38M$7.9M5.6%0.0%Reduced$-2.8MQ2 2026
Tetragon Partners GP Ltd
CIK 0001515070
Hedge Fund1.24M$7.1M5.0%1.1%Reduced$-286KQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund1.18M$6.8M4.8%0.0%Reduced$-307KQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund738K$4.2M3.0%0.0%Added—Q2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund692K$4.0M2.8%0.0%Reduced+$3.9MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund597K$3.4M2.4%0.0%Reduced+$2.9MQ2 2026
Woodline Partners LPAdded
Hedge Fund
$39.5M· 28.0% of total· 0.1% port· 6.93M sh· +$26.2M QoQ· Q2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Reduced
Hedge Fund
$20.0M· 14.1% of total· 0.0% port· 3.50M sh· $-4.6M QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCReduced
Hedge Fund
$16.2M· 11.4% of total· 0.0% port· 2.83M sh· $-6.0M QoQ· Q2 2026
Qube Research & Technologies LtdReduced
Hedge Fund
$15.7M· 11.1% of total· 0.0% port· 2.75M sh· $-2.1M QoQ· Q2 2026
Point72 Asset Management, L.P.Reduced
Hedge Fund
$7.9M· 5.6% of total· 0.0% port· 1.38M sh· $-2.8M QoQ· Q2 2026
Tetragon Partners GP LtdReduced
Hedge Fund
$7.1M· 5.0% of total· 1.1% port· 1.24M sh· $-286K QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$6.8M· 4.8% of total· 0.0% port· 1.18M sh· $-307K QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$4.2M· 3.0% of total· 0.0% port· 738K sh· — QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$4.0M· 2.8% of total· 0.0% port· 692K sh· +$3.9M QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$3.4M· 2.4% of total· 0.0% port· 597K sh· +$2.9M QoQ· Q2 2026
Schonfeld Strategic Advisors LLCAdded
Hedge Fund
$3.0M· 2.2% of total· 0.0% port· 534K sh· +$2.3M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$2.9M· 2.1% of total· 0.0% port· 513K sh· +$236K QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$2.6M· 1.9% of total· 0.0% port· 459K sh· $-487K QoQ· Q2 2026
MOORE CAPITAL MANAGEMENT, LPAdded
Hedge Fund
$2.4M· 1.7% of total· 0.0% port· 425K sh· — QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$1.5M· 1.1% of total· 0.0% port· 265K sh· $-6.2M QoQ· Q2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLCReduced
Hedge Fund
$1.4M· 1.0% of total· 0.0% port· 250K sh· $-1.2M QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$1.2M· 0.9% of total· 0.0% port· 211K sh· $-2.8M QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$989K· 0.7% of total· 0.0% port· 173K sh· +$601K QoQ· Q2 2026
JUPITER ASSET MANAGEMENT LTDAdded
Hedge Fund
$263K· 0.2% of total· 0.0% port· 46K sh· — QoQ· Q2 2026
Brevan Howard Capital Management LPReduced
Hedge Fund
$144K· 0.1% of total· 0.0% port· 25K sh· $-189K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$56K· 0.0% of total· 0.0% port· 10K sh· — QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$4K· 0.0% of total· 0.0% port· 786 sh· $-11K QoQ· Q2 2026
1–10 of 22
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