Marshall Wace
INSP icon

Marshall Wace’s Inspire Medical Systems INSP Stock Holding History

Marshall Wace’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
-531,079
Closed -$49M – 3443
2025
Q4 		$49M Buy
531,079
+396,810
+296% +$38M 0.04% 348
2025
Q3 		$9.96M Buy
134,269
+118,364
+744% +$12M 0.01% 921
2025
Q2 		$2.06M Buy
15,905
+577
+4% +$83.7K ﹤0.01% 1551
2025
Q1 		$2.44M Sell
15,328
-261,803
-94% -$47.4M ﹤0.01% 1389
2024
Q4 		$51.4M Buy
277,131
+262,353
+1,775% +$50.9M 0.06% 285
2024
Q3 		$3.12M Sell
14,778
-25,695
-63% -$4.46M ﹤0.01% 1192
2024
Q2 		$5.42M Buy
+40,473
New +$7.66M 0.01% 968
2024
Q1 		– Sell
-247,641
Closed -$50.4M – 2616
2023
Q4 		$50.4M Buy
247,641
+236,746
+2,173% +$38.4M 0.09% 234
2023
Q3 		$2.16M Sell
10,895
-266,082
-96% -$67.1M ﹤0.01% 1193
2023
Q2 		$89.9M Buy
276,977
+119,058
+75% +$34M 0.18% 121
2023
Q1 		$37M Sell
157,919
-48,003
-23% -$12.1M 0.08% 285
2022
Q4 		$51.9M Sell
205,922
-158,515
-43% -$33.8M 0.12% 193
2022
Q3 		$64.6M Sell
364,437
-5,666
-2% -$1.14M 0.14% 143
2022
Q2 		$67.6M Buy
370,103
+265,304
+253% +$52.9M 0.14% 148
2022
Q1 		$26.9M Sell
104,799
-250,762
-71% -$57.3M 0.05% 397
2021
Q4 		$81.8M Sell
355,561
-10,588
-3% -$2.59M 0.15% 128
2021
Q3 		$85.3M Sell
366,149
-70,080
-16% -$14.6M 0.35% 36
2021
Q2 		$84.3M Buy
436,229
+68,758
+19% +$13.6M 0.38% 45
2021
Q1 		$76.1M Buy
367,471
+220,888
+151% +$46.9M 0.35% 52
2020
Q4 		$27.6M Buy
146,583
+83,352
+132% +$13.6M 0.15% 136
2020
Q3 		$8.16M Buy
+63,231
New +$6.97M 0.05% 355

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

Marshall Wace's INSP Position: Q1 2026 in Review

Marshall Wace sold out of Inspire Medical Systems (INSP) in Q1 2026, closing a stake of 531,079 shares — an estimated $49M sold.

Marshall Wace first reported a position in INSP in Q3 2020 and held it in 21 quarters. The position peaked at $89.9M in Q2 2023. 301 funds tracked by Wall St. Rank hold INSP as of Q1 2026.

  • Marshall Wace reported no remaining Inspire Medical Systems position as of Q1 2026 after selling out during the quarter.
  • Marshall Wace sold 531,079 Inspire Medical Systems shares in Q1 2026, an estimated $49M.
  • Marshall Wace first reported a position in Inspire Medical Systems in Q3 2020 and held it in 21 quarters.
  • Marshall Wace's Inspire Medical Systems position peaked at $89.9M in Q2 2023.
  • 301 funds tracked by Wall St. Rank held Inspire Medical Systems as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.