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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
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 $5.72T AUM 30.48% 1-Year Est. Return
DM
Deerfield Management New York $8.48B AUM 99.04% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $30.3B AUM 33.75% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return

Rock Springs Capital Management's INSP Position: Q1 2026 in Review

Rock Springs Capital Management increased its Inspire Medical Systems (INSP) stake by 0.61% in Q1 2026, buying an estimated $56K and bringing the position to 131,800 shares worth $6.8M. The position accounts for 0.4% of the portfolio, ranked #58.

Rock Springs Capital Management first reported a position in INSP in Q1 2020 and has held it in 16 quarters since. The position peaked at $40.1M in Q4 2020. 301 funds tracked by Wall St. Rank hold INSP as of Q1 2026.

  • Rock Springs Capital Management held 131,800 shares of Inspire Medical Systems worth $6.8M as of Q1 2026.
  • Rock Springs Capital Management bought 800 Inspire Medical Systems shares in Q1 2026, an estimated $56K.
  • Inspire Medical Systems made up 0.4% of Rock Springs Capital Management's portfolio in Q1 2026, its #58 holding.
  • Rock Springs Capital Management first reported a position in Inspire Medical Systems in Q1 2020 and has held it in 16 quarters since.
  • Rock Springs Capital Management's Inspire Medical Systems position peaked at $40.1M in Q4 2020.
  • 301 funds tracked by Wall St. Rank held Inspire Medical Systems as of Q1 2026.

Based on Rock Springs Capital Management's 13F filing for Q1 2026, filed 15 May 2026.