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 		– Sell
-277,199
Closed -$19.4M – 12244
2025
Q4 		$25.6M Buy
277,199
+205,748
+288% +$19.7M ﹤0.01% 1406
2025
Q3 		$5.3M Buy
+71,451
New +$7.23M ﹤0.01% 3338
2025
Q1 		– Sell
-4,267
Closed -$772K – 9981
2024
Q4 		$791K Sell
4,267
-3,778
-47% -$733K ﹤0.01% 5827
2024
Q3 		$1.7M Sell
8,045
-54,830
-87% -$9.53M ﹤0.01% 4818
2024
Q2 		$8.41M Buy
62,875
+51,116
+435% +$9.67M ﹤0.01% 2240
2024
Q1 		$2.53M Sell
11,759
-54,266
-82% -$10.6M ﹤0.01% 3717
2023
Q4 		$13.4M Buy
66,025
+38,347
+139% +$6.21M ﹤0.01% 1647
2023
Q3 		$5.49M Sell
27,678
-2,042
-7% -$515K ﹤0.01% 2483
2023
Q2 		$9.65M Sell
29,720
-70,237
-70% -$20.1M ﹤0.01% 1939
2023
Q1 		$23.4M Buy
99,957
+85,640
+598% +$21.6M 0.01% 898
2022
Q4 		$3.61M Buy
14,317
+12,411
+651% +$2.65M ﹤0.01% 2952
2022
Q3 		$338K Sell
1,906
-3,416
-64% -$686K ﹤0.01% 7384
2022
Q2 		$972K Buy
5,322
+521
+11% +$104K ﹤0.01% 5532
2022
Q1 		$1.23M Buy
4,801
+545
+13% +$125K ﹤0.01% 5701
2021
Q4 		$979K Sell
4,256
-8,602
-67% -$2.1M ﹤0.01% 5944
2021
Q3 		$2.99M Buy
12,858
+6,244
+94% +$1.3M ﹤0.01% 3663
2021
Q2 		$1.28M Sell
6,614
-1,442
-18% -$286K ﹤0.01% 5277
2021
Q1 		$1.67M Buy
8,056
+2,759
+52% +$586K ﹤0.01% 4380
2020
Q4 		$996K Buy
5,297
+3,287
+164% +$537K ﹤0.01% 4660
2020
Q3 		$259K Buy
+2,010
New +$221K ﹤0.01% 6092
2019
Q3 		– Sell
-3,628
Closed -$220K – 5405
2019
Q2 		$220K Sell
3,628
-1,865
-34% -$101K ﹤0.01% 4594
2019
Q1 		$312K Buy
+5,493
New +$297K ﹤0.01% 4212

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

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.