Citadel Advisors
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Citadel Advisors’s Inspire Medical Systems INSP Stock Holding History

Citadel Advisors’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 		$1.45M Buy
28,200
+12,400
+78% +$868K ﹤0.01% 6784
2025
Q4 		$1.46M Sell
15,800
-14,800
-48% -$1.42M ﹤0.01% 6575
2025
Q3 		$2.27M Buy
30,600
+8,500
+38% +$861K ﹤0.01% 5825
2025
Q2 		$2.87M Sell
22,100
-22,500
-50% -$3.26M ﹤0.01% 5046
2025
Q1 		$7.1M Sell
44,600
-3,900
-8% -$706K ﹤0.01% 3348
2024
Q4 		$8.99M Sell
48,500
-38,500
-44% -$7.47M ﹤0.01% 3121
2024
Q3 		$18.4M Sell
87,000
-25,500
-23% -$4.43M ﹤0.01% 2138
2024
Q2 		$15.1M Buy
112,500
+7,600
+7% +$1.44M ﹤0.01% 2311
2024
Q1 		$22.5M Buy
104,900
+32,400
+45% +$6.35M ﹤0.01% 1947
2023
Q4 		$14.7M Sell
72,500
-30,200
-29% -$4.89M ﹤0.01% 2362
2023
Q3 		$20.4M Buy
102,700
+45,600
+80% +$11.5M ﹤0.01% 1831
2023
Q2 		$18.5M Buy
57,100
+15,500
+37% +$4.43M ﹤0.01% 1966
2023
Q1 		$9.74M Sell
41,600
-61,000
-59% -$15.4M ﹤0.01% 2851
2022
Q4 		$25.8M Buy
102,600
+41,600
+68% +$8.87M 0.01% 1695
2022
Q3 		$10.8M Buy
61,000
+11,800
+24% +$2.37M ﹤0.01% 2651
2022
Q2 		$8.99M Buy
49,200
+1,700
+4% +$339K ﹤0.01% 2833
2022
Q1 		$12.2M Buy
47,500
+13,700
+41% +$3.13M ﹤0.01% 2656
2021
Q4 		$7.78M Buy
33,800
+14,600
+76% +$3.56M ﹤0.01% 3506
2021
Q3 		$4.47M Buy
19,200
+7,700
+67% +$1.61M ﹤0.01% 4524
2021
Q2 		$2.22M Sell
11,500
-600
-5% -$119K ﹤0.01% 6330
2021
Q1 		$2.5M Sell
12,100
-9,100
-43% -$1.93M ﹤0.01% 5872
2020
Q4 		$3.99M Sell
21,200
-14,400
-40% -$2.35M ﹤0.01% 4072
2020
Q3 		$4.59M Buy
35,600
+19,400
+120% +$2.14M ﹤0.01% 3285
2020
Q2 		$1.41M Buy
16,200
+9,000
+125% +$692K ﹤0.01% 5194
2020
Q1 		$434K Sell
7,200
-300
-4% -$22.2K ﹤0.01% 6704
2019
Q4 		$557K Sell
7,500
-11,000
-59% -$707K ﹤0.01% 6642
2019
Q3 		$1.13M Buy
18,500
+7,500
+68% +$494K ﹤0.01% 5388
2019
Q2 		$667K Buy
+11,000
New +$593K ﹤0.01% 6355
2019
Q1 		– Sell
-5,800
Closed -$245K – 9564
2018
Q4 		$245K Buy
+5,800
New +$247K ﹤0.01% 7582

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

Citadel Advisors's INSP Position: Q1 2026 in Review

Citadel Advisors reduced its Inspire Medical Systems (INSP) stake by 23% in Q1 2026, selling an estimated $8.21M and leaving 394,076 shares worth $20.3M. The position accounts for ﹤0.01% of the portfolio, ranked #2329.

Citadel Advisors first reported a position in INSP in Q2 2018 and has held it in 32 quarters since. The position peaked at $159M in Q4 2022. 301 funds tracked by Wall St. Rank hold INSP as of Q1 2026.

  • Citadel Advisors held 394,076 shares of Inspire Medical Systems worth $20.3M as of Q1 2026.
  • Citadel Advisors sold 117,242 Inspire Medical Systems shares in Q1 2026, an estimated $8.21M.
  • Inspire Medical Systems made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #2329 holding.
  • Citadel Advisors first reported a position in Inspire Medical Systems in Q2 2018 and has held it in 32 quarters since.
  • Citadel Advisors's Inspire Medical Systems position peaked at $159M in Q4 2022.
  • 301 funds tracked by Wall St. Rank held Inspire Medical Systems as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.