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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
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
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
LSV Asset Management
LSV Asset Management Chicago, Illinois $46.4B AUM 27.74% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
KBG
Kahn Brothers Group New York $564M AUM 25.3% 1-Year Est. Return
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board Toronto Ontario, Ontario, Canada $155B AUM 29.93% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
PMG
Private Management Group Irvine, California $3.47B AUM 13.39% 1-Year Est. Return

Mangrove Partners's OGN Position: Q1 2026 in Review

Mangrove Partners opened a new position in Organon & Co (OGN) in Q1 2026: 73,164 shares worth $438K. The stake represents 0.04% of the portfolio and ranks #219 among its holdings. This is a return to the name: Mangrove Partners previously reported a position in OGN as recently as Q2 2025.

Mangrove Partners first reported a position in OGN in Q2 2025 and has held it in 2 quarters since. The position peaked at $903K in Q2 2025. 603 funds tracked by Wall St. Rank hold OGN as of Q1 2026.

  • Mangrove Partners held 73,164 shares of Organon & Co worth $438K as of Q1 2026.
  • Organon & Co was a new Mangrove Partners position in Q1 2026.
  • Organon & Co made up 0.04% of Mangrove Partners's portfolio in Q1 2026, its #219 holding.
  • Mangrove Partners first reported a position in Organon & Co in Q2 2025 and has held it in 2 quarters since.
  • Mangrove Partners's Organon & Co position peaked at $903K in Q2 2025.
  • 603 funds tracked by Wall St. Rank held Organon & Co as of Q1 2026.

Based on Mangrove Partners's 13F filing for Q1 2026, filed 15 May 2026.