RSCM
MRUS

Rock Springs Capital Management’s Merus MRUS Stock Holding History

Rock Springs 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
Q4 		– Sell
-597,051
Closed -$56.2M – 108
2025
Q3 		$56.2M Sell
597,051
-466,557
-44% -$30.4M 3.28% 6
2025
Q2 		$55.9M Buy
1,063,608
+82,857
+8% +$3.9M 3.49% 3
2025
Q1 		$41.3M Buy
980,751
+88,202
+10% +$3.85M 2.36% 13
2024
Q4 		$37.5M Hold
892,549
– – 1.43% 24
2024
Q3 		$44.6M Sell
892,549
-108,524
-11% -$5.67M 1.45% 27
2024
Q2 		$59.2M Sell
1,001,073
-145,487
-13% -$7.05M 1.78% 15
2024
Q1 		$51.6M Buy
1,146,560
+274,491
+31% +$11.1M 1.31% 28
2023
Q4 		$24M Buy
872,069
+33,641
+4% +$786K 0.59% 49
2023
Q3 		$19.8M Buy
838,428
+359,897
+75% +$8.73M 0.53% 59
2023
Q2 		$12.6M Buy
+478,531
New +$10.5M 0.3% 71
2018
Q2 		– Sell
-174,917
Closed -$3.24M – 150
2018
Q1 		$3.24M Sell
174,917
-97,035
-36% -$1.76M 0.14% 129
2017
Q4 		$5.28M Sell
271,952
-3,048
-1% -$51.6K 0.24% 106
2017
Q3 		$5.46M Sell
275,000
-127,000
-32% -$2.03M 0.25% 100
2017
Q2 		$6.37M Buy
402,000
+17,452
+5% +$331K 0.32% 88
2017
Q1 		$9.38M Sell
384,548
-15,452
-4% -$395K 0.54% 61
2016
Q4 		$8.44M Buy
400,000
+17,000
+4% +$290K 0.57% 54
2016
Q3 		$6.42M Buy
383,000
+22,189
+6% +$211K 0.4% 75
2016
Q2 		$2.88M Buy
+360,811
New +$3.16M 0.21% 105

Other funds holding MRUS

DekaBank Deutsche Girozentrale
DekaBank Deutsche Girozentrale Frankfurt, Germany $59.2B AUM 26.02% 1-Year Est. Return
XT
XTX Topco George Town, Cayman Islands $7.72B AUM 32.88% 1-Year Est. Return
BIG
Brooklyn Investment Group Brooklyn, New York $3.2B AUM 26.32% 1-Year Est. Return
NAM
NTV Asset Management Charleston, West Virginia $1.02B AUM 31.16% 1-Year Est. Return
FFA
Farther Finance Advisors San Francisco, California $12.8B AUM 26.53% 1-Year Est. Return
Simplex Trading
Simplex Trading Chicago, Illinois $171B AUM 85% 1-Year Est. Return
EWA
EverSource Wealth Advisors Birmingham, Alabama $2.97B AUM 28.72% 1-Year Est. Return
PA
Parallel Advisors San Francisco, California $6.56B AUM 32.24% 1-Year Est. Return
IA
IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return

Rock Springs Capital Management's MRUS Position: Q4 2025 in Review

Rock Springs Capital Management sold out of Merus (MRUS) in Q4 2025, closing a stake of 597,051 shares — an estimated $56.2M sold.

Rock Springs Capital Management first reported a position in MRUS in Q2 2016 and held it in 18 quarters. The position peaked at $59.2M in Q2 2024. 10 funds tracked by Wall St. Rank hold MRUS as of Q4 2025.

  • Rock Springs Capital Management reported no remaining Merus position as of Q4 2025 after selling out during the quarter.
  • Rock Springs Capital Management sold 597,051 Merus shares in Q4 2025, an estimated $56.2M.
  • Rock Springs Capital Management first reported a position in Merus in Q2 2016 and held it in 18 quarters.
  • Rock Springs Capital Management's Merus position peaked at $59.2M in Q2 2024.
  • 10 funds tracked by Wall St. Rank held Merus as of Q4 2025.

Based on Rock Springs Capital Management's 13F filing for Q4 2025, filed 17 Feb 2026.