MF
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Magnetar Financial’s Inspire Medical Systems INSP Stock Holding History

Magnetar Financial’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
Q4 		– Sell
-10,245
Closed -$760K – 1068
2025
Q3 		$760K Sell
10,245
-57,134
-85% -$5.78M ﹤0.01% 508
2025
Q2 		$8.74M Buy
+67,379
New +$9.77M 0.04% 157
2023
Q4 		– Sell
-10,183
Closed -$2.02M – 456
2023
Q3 		$2.02M Buy
+10,183
New +$2.57M 0.05% 184
2023
Q2 		– Sell
-3,215
Closed -$753K – 553
2023
Q1 		$753K Buy
+3,215
New +$813K 0.01% 421
2022
Q4 		– Sell
-3,718
Closed -$659K – 858
2022
Q3 		$659K Buy
+3,718
New +$747K 0.01% 781
2022
Q1 		– Sell
-1,241
Closed -$286K – 1427
2021
Q4 		$286K Buy
+1,241
New +$303K ﹤0.01% 1076

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
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
DM
Deerfield Management New York $8.48B AUM 99.04% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
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
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $29.7B AUM 43.33% 1-Year Est. Return

Magnetar Financial's INSP Position: Q4 2025 in Review

Magnetar Financial sold out of Inspire Medical Systems (INSP) in Q4 2025, closing a stake of 10,245 shares — an estimated $760K sold.

Magnetar Financial first reported a position in INSP in Q4 2021 and held it in 6 quarters. The position peaked at $8.74M in Q2 2025. 342 funds tracked by Wall St. Rank hold INSP as of Q4 2025.

  • Magnetar Financial reported no remaining Inspire Medical Systems position as of Q4 2025 after selling out during the quarter.
  • Magnetar Financial sold 10,245 Inspire Medical Systems shares in Q4 2025, an estimated $760K.
  • Magnetar Financial first reported a position in Inspire Medical Systems in Q4 2021 and held it in 6 quarters.
  • Magnetar Financial's Inspire Medical Systems position peaked at $8.74M in Q2 2025.
  • 342 funds tracked by Wall St. Rank held Inspire Medical Systems as of Q4 2025.

Based on Magnetar Financial's 13F filing for Q4 2025, filed 17 Feb 2026.