Stock Ownership/OGN

ORGANON & CO (OGN): Ownership & Insider Activity

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

Reported Holders
18
13F filers
Aggregate Value
$490.5M
Across holders
Last Price
$13.75
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity9 increased9 reduced8 exited
Full exits: Point72 Asset Management, L.P., Lighthouse Investment Partners, LLC, Bridgewater Associates, LP, Grantham, Mayo, Van Otterloo & Co. LLC, Schonfeld Strategic Advisors LLC, PineBridge Investments, L.P., Brevan Howard Capital Management LP, Walleye Capital LLC
Institutional Holders of OGN
↗
18 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
Pentwater Capital Management LP
CIK 0001425851
Hedge Fund18.10M$245.1M50.0%1.5%Added—Q2 2026
Man Group plc
CIK 0001637460
Hedge Fund4.18M$56.6M11.5%0.1%Added—Q2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund3.44M$46.6M9.5%0.0%Reduced+$42.5MQ2 2026
Magnetar Financial LLC
CIK 0001352851
Hedge Fund2.81M$38.0M7.8%0.3%Added—Q2 2026
BALYASNY ASSET MANAGEMENT LLC
CIK 0001218710
Hedge Fund2.20M$29.7M6.1%0.0%Added+$26.8MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund1.25M$16.8M3.4%0.0%Reduced+$15.9MQ2 2026
Gotham Asset Management, LLC
CIK 0001510387
Hedge Fund1.03M$14.0M2.8%0.0%Reduced$-3.0MQ2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund828K$11.2M2.3%0.0%Reduced$-26.7MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund719K$9.7M2.0%0.0%Reduced+$9.3MQ2 2026
Verition Fund Management LLC
CIK 0001454027
Hedge Fund498K$6.7M1.4%0.0%Added—Q2 2026
Pentwater Capital Management LPAdded
Hedge Fund
$245.1M· 50.0% of total· 1.5% port· 18.10M sh· — QoQ· Q2 2026
Man Group plcAdded
Hedge Fund
$56.6M· 11.5% of total· 0.1% port· 4.18M sh· — QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$46.6M· 9.5% of total· 0.0% port· 3.44M sh· +$42.5M QoQ· Q2 2026
Magnetar Financial LLCAdded
Hedge Fund
$38.0M· 7.8% of total· 0.3% port· 2.81M sh· — QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCAdded
Hedge Fund
$29.7M· 6.1% of total· 0.0% port· 2.20M sh· +$26.8M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$16.8M· 3.4% of total· 0.0% port· 1.25M sh· +$15.9M QoQ· Q2 2026
Gotham Asset Management, LLCReduced
Hedge Fund
$14.0M· 2.8% of total· 0.0% port· 1.03M sh· $-3.0M QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$11.2M· 2.3% of total· 0.0% port· 828K sh· $-26.7M QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$9.7M· 2.0% of total· 0.0% port· 719K sh· +$9.3M QoQ· Q2 2026
Verition Fund Management LLCAdded
Hedge Fund
$6.7M· 1.4% of total· 0.0% port· 498K sh· — QoQ· Q2 2026
Squarepoint Ops LLCReduced
Hedge Fund
$5.3M· 1.1% of total· 0.0% port· 390K sh· +$4.1M QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$4.7M· 1.0% of total· 0.0% port· 344K sh· $-763K QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$3.3M· 0.7% of total· 0.0% port· 241K sh· $-39.2M QoQ· Q2 2026
GAMCO INVESTORS, INC. ET ALAdded
Institutional Manager
$1.2M· 0.2% of total· 0.0% port· 87K sh· — QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$1.2M· 0.2% of total· 0.0% port· 86K sh· — QoQ· Q2 2026
CAXTON ASSOCIATES LLPAdded
Hedge Fund
$212K· 0.0% of total· 0.0% port· 16K sh· — QoQ· Q2 2026
TUDOR INVESTMENT CORP ET ALReduced
Hedge Fund
$151K· 0.0% of total· 0.0% port· 11K sh· $-357K QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$36K· 0.0% of total· 0.0% port· 3K sh· +$15K QoQ· Q2 2026
1–10 of 18
1 / 2
Loading recent insider activity…
← Stock ownership