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Atika Capital Management’s Inspire Medical Systems INSP Stock Holding History

Atika Capital Management’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
-187,600
Closed -$13.9M – 95
2025
Q3 		$13.9M Buy
187,600
+25,700
+16% +$2.6M 1.12% 28
2025
Q2 		$21M Buy
161,900
+1,300
+0.8% +$189K 2.1% 16
2025
Q1 		$25.6M Buy
160,600
+3,000
+2% +$543K 3.6% 10
2024
Q4 		$29.2M Sell
157,600
-2,400
-2% -$466K 3.1% 8
2024
Q3 		$33.8M Sell
160,000
-3,000
-2% -$521K 3.46% 6
2024
Q2 		$21.8M Buy
163,000
+33,265
+26% +$6.3M 2.14% 13
2024
Q1 		$27.9M Buy
129,735
+8,135
+7% +$1.59M 2.75% 6
2023
Q4 		$24.7M Sell
121,600
-18,565
-13% -$3.01M 3.31% 5
2023
Q3 		$27.8M Hold
140,165
– – 3.65% 2
2023
Q2 		$45.5M Sell
140,165
-1,200
-0.8% -$343K 4.55% 2
2023
Q1 		$33.1M Buy
141,365
+500
+0.4% +$126K 4.89% 2
2022
Q4 		$35.5M Sell
140,865
-12,637
-8% -$2.69M 5.1% 4
2022
Q3 		$27.2M Buy
153,502
+25,802
+20% +$5.19M 2.31% 8
2022
Q2 		$23.3M Buy
127,700
+2,200
+2% +$439K 2.62% 10
2022
Q1 		$32.2M Sell
125,500
-5,200
-4% -$1.19M 2.71% 5
2021
Q4 		$30.1M Sell
130,700
-9,400
-7% -$2.3M 2.11% 9
2021
Q3 		$32.6M Sell
140,100
-3,500
-2% -$730K 1.94% 7
2021
Q2 		$27.8M Sell
143,600
-4,400
-3% -$873K 2.19% 10
2021
Q1 		$30.6M Sell
148,000
-52,000
-26% -$11.1M 2.66% 4
2020
Q4 		$37.6M Sell
200,000
-58,000
-22% -$9.48M 2.95% 4
2020
Q3 		$33.3M Buy
258,000
+2,500
+1% +$275K 2.73% 5
2020
Q2 		$22.2M Sell
255,500
-13,500
-5% -$1.04M 2.87% 5
2020
Q1 		$16.2M Buy
269,000
+4,000
+2% +$296K 3.11% 7
2019
Q4 		$19.7M Buy
265,000
+41,000
+18% +$2.64M 3.8% 2
2019
Q3 		$13.7M Buy
224,000
+59,000
+36% +$3.88M 2.88% 5
2019
Q2 		$10M Buy
165,000
+26,000
+19% +$1.4M 1.97% 13
2019
Q1 		$7.89M Buy
139,000
+4,000
+3% +$216K 1.6% 22
2018
Q4 		$5.7M Buy
135,000
+8,600
+7% +$366K 1.68% 22
2018
Q3 		$5.32M Buy
126,400
+38,900
+44% +$1.83M 0.95% 37
2018
Q2 		$3.12M Buy
+87,500
New +$2.82M 0.6% 63

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

Atika Capital Management's INSP Position: Q4 2025 in Review

Atika Capital Management sold out of Inspire Medical Systems (INSP) in Q4 2025, closing a stake of 187,600 shares — an estimated $13.9M sold.

Atika Capital Management first reported a position in INSP in Q2 2018 and held it in 30 quarters. The position peaked at $45.5M in Q2 2023. 342 funds tracked by Wall St. Rank hold INSP as of Q4 2025.

  • Atika Capital Management reported no remaining Inspire Medical Systems position as of Q4 2025 after selling out during the quarter.
  • Atika Capital Management sold 187,600 Inspire Medical Systems shares in Q4 2025, an estimated $13.9M.
  • Atika Capital Management first reported a position in Inspire Medical Systems in Q2 2018 and held it in 30 quarters.
  • Atika Capital Management's Inspire Medical Systems position peaked at $45.5M in Q2 2023.
  • 342 funds tracked by Wall St. Rank held Inspire Medical Systems as of Q4 2025.

Based on Atika Capital Management's 13F filing for Q4 2025, filed 13 Feb 2026.