Water Island Capital’s Merus MRUS Stock Holding History

Water Island Capital’s Portfolio MRUS Stock Details MRUS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-96,000	Closed	-$9.04M	–	115
2025 Q3	$9.04M	Buy	+96,000	New	+$6.25M	1.14%	32

Other funds holding MRUS

DekaBank Deutsche Girozentrale

DekaBank Deutsche Girozentrale Frankfurt, Germany $59.2B AUM 26.02% 1-Year Est. Return

XTX Topco George Town, Cayman Islands $5.75B AUM 30.56% 1-Year Est. Return

Brooklyn Investment Group Brooklyn, New York $3.2B AUM 26.32% 1-Year Est. Return

NTV Asset Management Charleston, West Virginia $1.02B AUM 31.16% 1-Year Est. Return

Farther Finance Advisors San Francisco, California $12.8B AUM 26.53% 1-Year Est. Return

Simplex Trading

Simplex Trading Chicago, Illinois $149B AUM 62.07% 1-Year Est. Return

EverSource Wealth Advisors Birmingham, Alabama $2.97B AUM 28.72% 1-Year Est. Return

Parallel Advisors San Francisco, California $6.56B AUM 32.24% 1-Year Est. Return

IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return

Water Island Capital's MRUS Position: Q4 2025 in Review

Water Island Capital sold out of Merus (MRUS) in Q4 2025, closing a stake of 96,000 shares — an estimated $9.04M sold.

Water Island Capital first reported a position in MRUS in Q3 2025 and held it in 1 quarter. The position peaked at $9.04M in Q3 2025. 10 funds tracked by Wall St. Rank hold MRUS as of Q4 2025.

Water Island Capital reported no remaining Merus position as of Q4 2025 after selling out during the quarter.
Water Island Capital sold 96,000 Merus shares in Q4 2025, an estimated $9.04M.
Water Island Capital first reported a position in Merus in Q3 2025 and held it in 1 quarter.
Water Island Capital's Merus position peaked at $9.04M in Q3 2025.
10 funds tracked by Wall St. Rank held Merus as of Q4 2025.

Based on Water Island Capital's 13F filing for Q4 2025, filed 17 Feb 2026.