Mangrove Partners’s Organon & Co OGN Stock Holding History

Mangrove Partners’s Portfolio OGN Stock Details OGN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	–	Sell	-73,164	Closed	-$438K	–	536
2026 Q1	$438K	Buy	+73,164	New	+$551K	0.04%	219
2025 Q3	–	Sell	-93,327	Closed	-$903K	–	227
2025 Q2	$903K	Buy	+93,327	New	+$963K	0.1%	75

Other funds holding OGN

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

PCM

Pentwater Capital Management Naples, Florida $16.4B AUM 55.44% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Man Group London, United Kingdom $62.7B AUM 29.77% 1-Year Est. Return

AQR Arbitrage Greenwich, Connecticut $7.02B AUM 31.58% 1-Year Est. Return

Mangrove Partners's OGN Position: Q2 2026 in Review

Mangrove Partners sold out of Organon & Co (OGN) in Q2 2026, closing a stake of 73,164 shares — an estimated $438K sold.

Mangrove Partners first reported a position in OGN in Q2 2025 and held it in 2 quarters. The position peaked at $903K in Q2 2025. 636 funds tracked by Wall St. Rank hold OGN as of Q2 2026.

Mangrove Partners reported no remaining Organon & Co position as of Q2 2026 after selling out during the quarter.
Mangrove Partners sold 73,164 Organon & Co shares in Q2 2026, an estimated $438K.
Mangrove Partners first reported a position in Organon & Co in Q2 2025 and held it in 2 quarters.
Mangrove Partners's Organon & Co position peaked at $903K in Q2 2025.
636 funds tracked by Wall St. Rank held Organon & Co as of Q2 2026.

Based on Mangrove Partners's 13F filing for Q2 2026, filed 14 Aug 2026.