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Rock Springs Capital Management’s Inspire Medical Systems INSP Stock Holding History

Rock Springs Capital Management’s Portfolio INSP Stock Details INSP Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$10.9M Buy
244,000
+112,200
+85% +$5.32M 0.53% 52
2026
Q1 		$6.8M Buy
131,800
+800
+0.6% +$56K 0.4% 58
2025
Q4 		$12.1M Buy
131,000
+20,500
+19% +$1.96M 0.62% 48
2025
Q3 		$8.2M Buy
110,500
+3,000
+3% +$304K 0.48% 57
2025
Q2 		$14M Buy
107,500
+8,250
+8% +$1.2M 0.87% 42
2025
Q1 		$15.8M Sell
99,250
-30,750
-24% -$5.56M 0.9% 40
2024
Q4 		$24.1M Hold
130,000
– – 0.92% 38
2024
Q3 		$27.4M Hold
130,000
– – 0.89% 43
2024
Q2 		$17.4M Sell
130,000
-500
-0.4% -$94.6K 0.52% 54
2024
Q1 		$28M Buy
130,500
+31,500
+32% +$6.17M 0.71% 49
2023
Q4 		$20.1M Buy
99,000
+54,500
+122% +$8.83M 0.5% 58
2023
Q3 		$8.83M Buy
+44,500
New +$11.2M 0.24% 75
2021
Q2 		– Sell
-100,000
Closed -$20.7M – 160
2021
Q1 		$20.7M Sell
100,000
-113,350
-53% -$24.1M 0.45% 70
2020
Q4 		$40.1M Sell
213,350
-22,650
-10% -$3.7M 0.85% 41
2020
Q3 		$30.5M Sell
236,000
-29,000
-11% -$3.2M 0.77% 41
2020
Q2 		$23.1M Buy
265,000
+65,000
+33% +$5M 0.63% 55
2020
Q1 		$12.1M Buy
+200,000
New +$14.8M 0.5% 65

Other funds holding INSP

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
SCM
Soleus Capital Management Greenwich, Connecticut $2.9B AUM 169.69% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
Nomura Holdings
Nomura Holdings Tokyo, Japan $85.4B AUM 91.09% 1-Year Est. Return
DM
Deerfield Management New York $9.59B AUM 113.36% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Rock Springs Capital Management's INSP Position: Q2 2026 in Review

Rock Springs Capital Management increased its Inspire Medical Systems (INSP) stake by 85% in Q2 2026, buying an estimated $5.32M and bringing the position to 244,000 shares worth $10.9M. The position accounts for 0.53% of the portfolio, ranked #52.

Rock Springs Capital Management first reported a position in INSP in Q1 2020 and has held it in 17 quarters since. The position peaked at $40.1M in Q4 2020. 275 funds tracked by Wall St. Rank hold INSP as of Q2 2026.

  • Rock Springs Capital Management held 244,000 shares of Inspire Medical Systems worth $10.9M as of Q2 2026.
  • Rock Springs Capital Management bought 112,200 Inspire Medical Systems shares in Q2 2026, an estimated $5.32M.
  • Inspire Medical Systems made up 0.53% of Rock Springs Capital Management's portfolio in Q2 2026, its #52 holding.
  • Rock Springs Capital Management first reported a position in Inspire Medical Systems in Q1 2020 and has held it in 17 quarters since.
  • Rock Springs Capital Management's Inspire Medical Systems position peaked at $40.1M in Q4 2020.
  • 275 funds tracked by Wall St. Rank held Inspire Medical Systems as of Q2 2026.

Based on Rock Springs Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.