William Blair & Company
INSP icon

William Blair & Company’s Inspire Medical Systems INSP Stock Holding History

William Blair & Company’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 		– Sell
-5,189
Closed -$268K – 2033
2026
Q1 		$268K Buy
5,189
+457
+10% +$32K ﹤0.01% 1375
2025
Q4 		$436K Sell
4,732
-133
-3% -$12.7K ﹤0.01% 1190
2025
Q3 		$361K Buy
4,865
+234
+5% +$23.7K ﹤0.01% 1239
2025
Q2 		$601K Hold
4,631
– – ﹤0.01% 1043
2025
Q1 		$738K Sell
4,631
-185
-4% -$33.5K ﹤0.01% 969
2024
Q4 		$893K Sell
4,816
-3,501
-42% -$680K ﹤0.01% 934
2024
Q3 		$1.76M Buy
8,317
+491
+6% +$85.3K 0.01% 746
2024
Q2 		$1.05M Buy
7,826
+905
+13% +$171K ﹤0.01% 860
2024
Q1 		$1.49M Buy
6,921
+6
+0.1% +$1.18K ﹤0.01% 760
2023
Q4 		$1.41M Buy
6,915
+730
+12% +$118K ﹤0.01% 758
2023
Q3 		$1.23M Sell
6,185
-964
-13% -$243K ﹤0.01% 774
2023
Q2 		$2.32M Sell
7,149
-54
-0.7% -$15.4K 0.01% 631
2023
Q1 		$1.69M Buy
7,203
+21
+0.3% +$5.31K 0.01% 695
2022
Q4 		$1.81M Buy
7,182
+858
+14% +$183K 0.01% 662
2022
Q3 		$1.12M Buy
6,324
+73
+1% +$14.7K 0.01% 781
2022
Q2 		$1.14M Sell
6,251
-382
-6% -$76.2K 0.01% 800
2022
Q1 		$1.7M Sell
6,633
-408
-6% -$93.2K 0.01% 742
2021
Q4 		$1.62M Buy
7,041
+15
+0.2% +$3.66K 0.01% 787
2021
Q3 		$1.64M Buy
7,026
+499
+8% +$104K 0.01% 759
2021
Q2 		$1.26M Hold
6,527
– – ﹤0.01% 842
2021
Q1 		$1.35M Buy
6,527
+335
+5% +$71.2K 0.01% 803
2020
Q4 		$1.17M Buy
6,192
+1,922
+45% +$314K ﹤0.01% 803
2020
Q3 		$551K Hold
4,270
– – ﹤0.01% 947
2020
Q2 		$372K Hold
4,270
– – ﹤0.01% 1017
2020
Q1 		$257K Sell
4,270
-3,581
-46% -$265K ﹤0.01% 1070
2019
Q4 		$583K Buy
7,851
+3,581
+84% +$230K ﹤0.01% 942
2019
Q3 		$261K Hold
4,270
– – ﹤0.01% 1178
2019
Q2 		$259K Buy
+4,270
New +$230K ﹤0.01% 1207

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

William Blair & Company's INSP Position: Q2 2026 in Review

William Blair & Company sold out of Inspire Medical Systems (INSP) in Q2 2026, closing a stake of 5,189 shares — an estimated $268K sold.

William Blair & Company first reported a position in INSP in Q2 2019 and held it in 28 quarters. The position peaked at $2.32M in Q2 2023. 276 funds tracked by Wall St. Rank hold INSP as of Q2 2026.

  • William Blair & Company reported no remaining Inspire Medical Systems position as of Q2 2026 after selling out during the quarter.
  • William Blair & Company sold 5,189 Inspire Medical Systems shares in Q2 2026, an estimated $268K.
  • William Blair & Company first reported a position in Inspire Medical Systems in Q2 2019 and held it in 28 quarters.
  • William Blair & Company's Inspire Medical Systems position peaked at $2.32M in Q2 2023.
  • 276 funds tracked by Wall St. Rank held Inspire Medical Systems as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.