Mariner
INSP icon

Mariner’s Inspire Medical Systems INSP Stock Holding History

Mariner’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
2025
Q3 		– Sell
-3,506
Closed -$455K – 3671
2025
Q2 		$455K Sell
3,506
-705
-17% -$102K ﹤0.01% 2401
2025
Q1 		$671K Sell
4,211
-626
-13% -$113K ﹤0.01% 1962
2024
Q4 		$897K Buy
4,837
+77
+2% +$14.9K ﹤0.01% 1738
2024
Q3 		$1M Sell
4,760
-698
-13% -$121K ﹤0.01% 1600
2024
Q2 		$730K Buy
5,458
+971
+22% +$184K ﹤0.01% 1743
2024
Q1 		$964K Sell
4,487
-664
-13% -$130K ﹤0.01% 1524
2023
Q4 		$1.05M Buy
5,151
+938
+22% +$152K ﹤0.01% 1398
2023
Q3 		$836K Sell
4,213
-120
-3% -$30.3K ﹤0.01% 1423
2023
Q2 		$1.41M Buy
4,333
+1
+0% +$286 ﹤0.01% 1123
2023
Q1 		$1.01M Buy
4,332
+3,072
+244% +$777K ﹤0.01% 1266
2022
Q4 		$317K Buy
1,260
+130
+12% +$27.7K ﹤0.01% 1979
2022
Q3 		$200K Buy
+1,130
New +$227K ﹤0.01% 2061

Other funds holding INSP

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $30.3B AUM 33.75% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $97.9B AUM 20.73% 1-Year Est. Return
DM
Deerfield Management New York $8.48B AUM 99.04% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
B
Braidwell Stamford, Connecticut $3B AUM 46.72% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $481B AUM 26.39% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Mariner's INSP Position: Q3 2025 in Review

Mariner sold out of Inspire Medical Systems (INSP) in Q3 2025, closing a stake of 3,506 shares — an estimated $455K sold.

Mariner first reported a position in INSP in Q3 2022 and held it in 12 quarters. The position peaked at $1.41M in Q2 2023. 325 funds tracked by Wall St. Rank hold INSP as of Q3 2025.

  • Mariner reported no remaining Inspire Medical Systems position as of Q3 2025 after selling out during the quarter.
  • Mariner sold 3,506 Inspire Medical Systems shares in Q3 2025, an estimated $455K.
  • Mariner first reported a position in Inspire Medical Systems in Q3 2022 and held it in 12 quarters.
  • Mariner's Inspire Medical Systems position peaked at $1.41M in Q2 2023.
  • 325 funds tracked by Wall St. Rank held Inspire Medical Systems as of Q3 2025.

Based on Mariner's 13F filing for Q3 2025, filed 14 Nov 2025.