Jane Street
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Jane Street’s Inspire Medical Systems INSP Stock Holding History

Jane Street’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 		$4.48M Buy
86,800
+4,800
+6% +$336K ﹤0.01% 3679
2025
Q4 		$7.56M Buy
82,000
+65,200
+388% +$6.24M ﹤0.01% 2675
2025
Q3 		$1.25M Buy
16,800
+13,700
+442% +$1.39M ﹤0.01% 5851
2025
Q2 		$402K Sell
3,100
-5,900
-66% -$856K ﹤0.01% 7331
2025
Q1 		$1.43M Sell
9,000
-37,000
-80% -$6.69M ﹤0.01% 4923
2024
Q4 		$8.53M Sell
46,000
-1,700
-4% -$330K ﹤0.01% 2047
2024
Q3 		$10.1M Buy
47,700
+7,100
+17% +$1.23M ﹤0.01% 1908
2024
Q2 		$5.43M Buy
40,600
+27,000
+199% +$5.11M ﹤0.01% 2849
2024
Q1 		$2.92M Buy
13,600
+5,500
+68% +$1.08M ﹤0.01% 3454
2023
Q4 		$1.65M Sell
8,100
-28,300
-78% -$4.58M ﹤0.01% 4670
2023
Q3 		$7.22M Buy
36,400
+26,900
+283% +$6.78M ﹤0.01% 2152
2023
Q2 		$3.08M Buy
9,500
+7,400
+352% +$2.11M ﹤0.01% 3444
2023
Q1 		$492K Buy
2,100
+900
+75% +$228K ﹤0.01% 6350
2022
Q4 		$302K Sell
1,200
-45,700
-97% -$9.74M ﹤0.01% 7008
2022
Q3 		$8.32M Buy
46,900
+30,800
+191% +$6.19M ﹤0.01% 1894
2022
Q2 		$2.94M Buy
16,100
+10,400
+182% +$2.07M ﹤0.01% 3484
2022
Q1 		$1.46M Sell
5,700
-1,700
-23% -$389K ﹤0.01% 5350
2021
Q4 		$1.7M Buy
7,400
+4,600
+164% +$1.12M ﹤0.01% 4803
2021
Q3 		$652K Sell
2,800
-2,900
-51% -$605K ﹤0.01% 6775
2021
Q2 		$1.1M Sell
5,700
-4,400
-44% -$873K ﹤0.01% 5626
2021
Q1 		$2.09M Buy
10,100
+3,700
+58% +$786K ﹤0.01% 3927
2020
Q4 		$1.2M Buy
6,400
+4,200
+191% +$687K ﹤0.01% 4361
2020
Q3 		$284K Buy
+2,200
New +$242K ﹤0.01% 5953

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

Jane Street's INSP Position: Q1 2026 in Review

Jane Street sold out of Inspire Medical Systems (INSP) in Q1 2026, closing a stake of 277,199 shares — an estimated $19.4M sold.

Jane Street first reported a position in INSP in Q1 2019 and held it in 22 quarters. The position peaked at $25.6M in Q4 2025. 301 funds tracked by Wall St. Rank hold INSP as of Q1 2026.

  • Jane Street reported no remaining Inspire Medical Systems position as of Q1 2026 after selling out during the quarter.
  • Jane Street sold 277,199 Inspire Medical Systems shares in Q1 2026, an estimated $19.4M.
  • Jane Street first reported a position in Inspire Medical Systems in Q1 2019 and held it in 22 quarters.
  • Jane Street's Inspire Medical Systems position peaked at $25.6M in Q4 2025.
  • 301 funds tracked by Wall St. Rank held Inspire Medical Systems as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.