Sio Capital Management’s Merus MRUS Stock Holding History

Sio Capital Management’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 Q3	–	Sell	-62,719	Closed	-$3.3M	–	62
2025 Q2	$3.3M	Buy	+62,719	New	+$2.95M	1.26%	22
2023 Q2	–	Sell	-15,564	Closed	-$286K	–	53
2023 Q1	$286K	Sell	15,564 -72,389	-82%	-$1.26M	0.14%	38
2022 Q4	$1.36M	Hold	87,953	–	–	0.5%	27
2022 Q3	$1.76M	Hold	87,953	–	–	0.56%	28
2022 Q2	$1.99M	Sell	87,953 -2,047	-2%	-$42.7K	0.75%	33
2022 Q1	$2.38M	Hold	90,000	–	–	0.79%	32
2021 Q4	$2.86M	Buy	+90,000	New	+$2.54M	0.86%	32

Other funds holding MRUS

PBA

Paradigm Biocapital Advisors New York $5.34B AUM 380.18% 1-Year Est. Return

ACA

Avoro Capital Advisors New York $11.1B AUM 207.82% 1-Year Est. Return

Commodore Capital New York $1.68B AUM 375.52% 1-Year Est. Return

Deerfield Management New York $9.59B AUM 113.36% 1-Year Est. Return

HBK Investments Dallas, Texas $10.3B AUM 67.69% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

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

Westfield Capital Management Boston, Massachusetts $30.6B AUM 61.81% 1-Year Est. Return

RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return

Woodline Partners San Francisco, California $32.4B AUM 58.5% 1-Year Est. Return

Sio Capital Management's MRUS Position: Q3 2025 in Review

Sio Capital Management sold out of Merus (MRUS) in Q3 2025, closing a stake of 62,719 shares — an estimated $3.3M sold.

Sio Capital Management first reported a position in MRUS in Q4 2021 and held it in 7 quarters. The position peaked at $3.3M in Q2 2025. 268 funds tracked by Wall St. Rank hold MRUS as of Q3 2025.

Sio Capital Management reported no remaining Merus position as of Q3 2025 after selling out during the quarter.
Sio Capital Management sold 62,719 Merus shares in Q3 2025, an estimated $3.3M.
Sio Capital Management first reported a position in Merus in Q4 2021 and held it in 7 quarters.
Sio Capital Management's Merus position peaked at $3.3M in Q2 2025.
268 funds tracked by Wall St. Rank held Merus as of Q3 2025.

Based on Sio Capital Management's 13F filing for Q3 2025, filed 13 Nov 2025.