Stock Ownership/MBX

MBX BIOSCIENCES INC (MBX): Ownership & Insider Activity

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

Reported Holders
13
13F filers
Aggregate Value
$320.8M
Across holders
Last Price
$66.39
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity7 increased6 reduced4 exited
Full exits: Verition Fund Management LLC, CITADEL ADVISORS LLC, Qube Research & Technologies Ltd, Squarepoint Ops LLC
Institutional Holders of MBX
↗
13 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
ORBIMED ADVISORS LLC
CIK 0001055951
Hedge Fund3.43M$189.3M59.0%3.5%Reduced$-11.5MQ2 2026
Woodline Partners LP
CIK 0001784547
Hedge Fund900K$49.7M15.5%0.2%Added+$2KQ2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund402K$22.2M6.9%0.0%Added+$20.3MQ2 2026
Schonfeld Strategic Advisors LLC
CIK 0001665241
Hedge Fund249K$13.7M4.3%0.0%Added+$6.9MQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund226K$12.5M3.9%0.0%Reduced$-18.7MQ2 2026
Tetragon Partners GP Ltd
CIK 0001515070
Hedge Fund204K$11.2M3.5%1.8%Added+$3.2MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund183K$10.1M3.1%0.0%Reduced$-5.9MQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund113K$6.3M2.0%0.0%Reduced$-88KQ2 2026
MOORE CAPITAL MANAGEMENT, LP
CIK 0001448574
Hedge Fund65K$3.6M1.1%0.1%Added—Q2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund23K$1.2M0.4%0.0%Reduced$-7.6MQ2 2026
ORBIMED ADVISORS LLCReduced
Hedge Fund
$189.3M· 59.0% of total· 3.5% port· 3.43M sh· $-11.5M QoQ· Q2 2026
Woodline Partners LPAdded
Hedge Fund
$49.7M· 15.5% of total· 0.2% port· 900K sh· +$2K QoQ· Q2 2026
MARSHALL WACE, LLPAdded
Hedge Fund
$22.2M· 6.9% of total· 0.0% port· 402K sh· +$20.3M QoQ· Q2 2026
Schonfeld Strategic Advisors LLCAdded
Hedge Fund
$13.7M· 4.3% of total· 0.0% port· 249K sh· +$6.9M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$12.5M· 3.9% of total· 0.0% port· 226K sh· $-18.7M QoQ· Q2 2026
Tetragon Partners GP LtdAdded
Hedge Fund
$11.2M· 3.5% of total· 1.8% port· 204K sh· +$3.2M QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$10.1M· 3.1% of total· 0.0% port· 183K sh· $-5.9M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$6.3M· 2.0% of total· 0.0% port· 113K sh· $-88K QoQ· Q2 2026
MOORE CAPITAL MANAGEMENT, LPAdded
Hedge Fund
$3.6M· 1.1% of total· 0.1% port· 65K sh· — QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$1.2M· 0.4% of total· 0.0% port· 23K sh· $-7.6M QoQ· Q2 2026
FRED ALGER MANAGEMENT, LLCAdded
Hedge Fund
$545K· 0.2% of total· 0.0% port· 10K sh· — QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$475K· 0.1% of total· 0.0% port· 9K sh· — QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$12K· 0.0% of total· 0.0% port· 224 sh· $-153K QoQ· Q2 2026
1–10 of 13
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