Mangrove Partners’s Stem STEM Stock Holding History

Mangrove Partners’s Portfolio STEM Stock Details STEM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-18,061	Closed	-$272K	–	574
2025 Q4	$272K	Buy	+18,061	New	+$346K	0.02%	212

Other funds holding STEM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

GCP

GSA Capital Partners London, United Kingdom $1.61B AUM 28.28% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Trexquant Investment Stamford, Connecticut $13.9B AUM 31.98% 1-Year Est. Return

BCM

Bridgeway Capital Management Houston, Texas $4.97B AUM 44.96% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

Mangrove Partners's STEM Position: Q1 2026 in Review

Mangrove Partners sold out of Stem (STEM) in Q1 2026, closing a stake of 18,061 shares — an estimated $272K sold.

Mangrove Partners first reported a position in STEM in Q4 2025 and held it in 1 quarter. The position peaked at $272K in Q4 2025. 75 funds tracked by Wall St. Rank hold STEM as of Q1 2026.

Mangrove Partners reported no remaining Stem position as of Q1 2026 after selling out during the quarter.
Mangrove Partners sold 18,061 Stem shares in Q1 2026, an estimated $272K.
Mangrove Partners first reported a position in Stem in Q4 2025 and held it in 1 quarter.
Mangrove Partners's Stem position peaked at $272K in Q4 2025.
75 funds tracked by Wall St. Rank held Stem as of Q1 2026.

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