Rock Springs Capital Management LP Portfolio Holdings

Rock Springs Capital Management LP

  • $1.47 Billion
  • Q2 2025

Rock Springs Capital Management LP has filed its 13F form on August 14, 2025 for Q2 2025 where it was disclosed a total value porftolio of $1.47 Billion distributed in 93 stocks.

Among their holdings, we can observe that their the top five positions include companies like: Argenx Se with a value of $96.9M, Eli Lilly & CO with a value of $90.8M, Merus N.V. with a value of $55.9M, Rhythm Pharmaceuticals, Inc. with a value of $54.4M, and Insmed Inc with a value of $52.8M.

Examining the 13F form we can see an decrease of $200M in the current position value, from $1.67B to 1.47B.

Rock Springs Capital Management LP is based out at Baltimore, MD

Below you can find more details about Rock Springs Capital Management LP portfolio as well as his latest detailed transactions.

Portfolio value $1.47 Billion
Healthcare: $1.46 Billion
ETFs: $12.6 Million

Stock Holdings Table

Stock Market Cap. Holding Value (Reported) # of Shares. Last Trade Trade History
$35.3B
$96.9 Million 6.58% of portfolio
175,750
Q1 2025 Reduced 23.45%
$608B
$90.8 Million 6.17% of portfolio
116,500
Q2 2025 Added 2.64%
$2.93B
$55.9 Million 3.8% of portfolio
1,063,608
Q2 2025 Added 8.45%
$5.51B
$54.4 Million 3.69% of portfolio
861,153
Q2 2025 Added 3.23%
$16.5B
$52.8 Million 3.59% of portfolio
525,000
Q2 2025 Added 1.76%
$1.97B
$50.6 Million 3.43% of portfolio
1,391,072
Q2 2025 Reduced 0.24%
$3.09B
$49 Million 3.32% of portfolio
1,330,960
Q2 2025 Added 3.85%
$169B
$44.6 Million 3.03% of portfolio
82,000
Q2 2025 Reduced 19.61%
$6.14B
$42.5 Million 2.88% of portfolio
140,296
Q2 2025 Reduced 15.84%
$2.38B
$41.6 Million 2.83% of portfolio
818,206
Q2 2025 Reduced 14.03%
$147B
$38.1 Million 2.59% of portfolio
355,000
Q2 2025 Added 28.16%
$10.9B
$37.5 Million 2.54% of portfolio
217,000
Q2 2025 Added 0.46%
$4.87B
$37.3 Million 2.53% of portfolio
242,500
Q2 2025 Reduced 4.64%
$2.23B
$34.2 Million 2.32% of portfolio
640,526
Q2 2025 Reduced 4.79%
$9.42B
$33 Million 2.24% of portfolio
128,500
Q2 2025 Reduced 24.85%
$1.94B
$32.9 Million 2.23% of portfolio
989,745
Q2 2025 Added 189.25%
$854M
$31.8 Million 2.16% of portfolio
2,820,700
Q2 2025 Added 4.64%
$3.36B
$30.5 Million 2.07% of portfolio
871,392
Q2 2025 Reduced 3.67%
$7.33B
$30.4 Million 2.06% of portfolio
572,000
Q2 2025 Added 19.17%
$2.24B
$29.2 Million 1.98% of portfolio
931,681
Q1 2025 Reduced 25.58%
$1.12B
$28.2 Million 1.92% of portfolio
1,908,208
Q2 2025 Reduced 34.68%
$1.66B
$28.1 Million 1.91% of portfolio
794,133
Q2 2025 Added 4.28%
$31B
$25 Million 1.7% of portfolio
286,750
Q2 2025 Reduced 27.89%
$1.46B
$23.8 Million 1.62% of portfolio
837,300
Q2 2025 Reduced 27.09%
$7.73B
$23.8 Million 1.61% of portfolio
185,500
Q2 2025 Reduced 81.59%
$18.4B
$22.9 Million 1.55% of portfolio
130,000
Q1 2025 Added 0.62%
$2.18B
$19.7 Million 1.33% of portfolio
450,374
Q2 2025 Reduced 43.31%
$1.11B
$16.5 Million 1.12% of portfolio
812,653
Q1 2025 Reduced 33.51%
$2.2B
$16.3 Million 1.11% of portfolio
530,400
Q2 2025 Added 11.66%
$1.83B
$15.8 Million 1.07% of portfolio
696,000
Q2 2025 Added 2.19%
$245B
$15.8 Million 1.07% of portfolio
50,500
Q2 2025 Reduced 49.75%
$1.37B
$15.1 Million 1.03% of portfolio
373,750
Q2 2025 Added 5.47%
$5.17B
$15.1 Million 1.03% of portfolio
710,000
Q2 2025 Reduced 28.64%
$2.65B
$15 Million 1.02% of portfolio
700,000
Q2 2025 Reduced 33.33%
$366M
$15.1 Million 1.02% of portfolio
6,550,400
Q2 2025 Reduced 5.75%
$572M
$14.5 Million 0.99% of portfolio
617,396
Q2 2025 Added 18.55%
$2.39B
$14 Million 0.95% of portfolio
107,500
Q2 2025 Added 8.31%
$321M
$12.9 Million 0.88% of portfolio
4,962,955
Q1 2025 Reduced 14.13%
$0
$12.6 Million 0.85% of portfolio
151,750
Q2 2025 New
$3.19B
$12.3 Million 0.83% of portfolio
186,314
Q2 2025 New
$207M
$12.1 Million 0.82% of portfolio
4,465,292
Q2 2025 Reduced 33.2%
$150B
$11.7 Million 0.79% of portfolio
59,000
Q2 2025 Added 0.34%
$17.8B
$11.2 Million 0.76% of portfolio
51,030
Q2 2025 Reduced 15.3%
$12.3B
$11.2 Million 0.76% of portfolio
88,800
Q2 2025 Reduced 68.17%
$1.96B
$11.2 Million 0.76% of portfolio
1,960,334
Q2 2025 Added 2.67%
$712M
$11 Million 0.74% of portfolio
623,402
Q1 2025 Reduced 19.57%
$47.6B
$10.2 Million 0.7% of portfolio
131,000
Q2 2025 Reduced 48.63%
$866M
$8.96 Million 0.61% of portfolio
2,286,273
Q2 2025 Added 42.45%
$3.29B
$7.12 Million 0.48% of portfolio
93,328
Q2 2025 Reduced 78.17%

Summary

  • Portfolio
  • No. of Stocks 93
  • Current Value $1.47 Billion
  • Prior Value $1.67 Billion
  • Filing
  • Period Q2 2025
  • Filing Date August 14, 2025
  • Form Type 13F-HR
  • Activity in Q2 2025
  • New Purchases 9 stocks
  • Additional Purchases 32 stocks
  • Sold out of 0 stocks
  • Reduced holdings in 29 stocks
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