Janus Henderson Group
INSP icon

Janus Henderson Group’s Inspire Medical Systems INSP Stock Holding History

Janus Henderson Group’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 		$694K Sell
13,451
-548,880
-98% -$38.4M ﹤0.01% 1855
2025
Q4 		$51.9M Sell
562,331
-104,747
-16% -$10M 0.02% 408
2025
Q3 		$49.5M Buy
667,078
+26,155
+4% +$2.65M 0.02% 409
2025
Q2 		$83.2M Sell
640,923
-1,837
-0.3% -$266K 0.04% 297
2025
Q1 		$101M Buy
642,760
+75,448
+13% +$13.6M 0.06% 262
2024
Q4 		$105M Buy
567,312
+64,703
+13% +$12.6M 0.05% 271
2024
Q3 		$106M Buy
502,609
+27,374
+6% +$4.76M 0.05% 273
2024
Q2 		$63.6M Buy
475,235
+461,635
+3,394% +$87.4M 0.03% 330
2024
Q1 		$2.93M Sell
13,600
-2
-0% -$392 ﹤0.01% 1107
2023
Q4 		$2.77M Sell
13,602
-21
-0.2% -$3.4K ﹤0.01% 1073
2023
Q3 		$2.7M Buy
13,623
+2
+0% +$504 ﹤0.01% 1031
2023
Q2 		$4.42M Sell
13,621
-13
-0.1% -$3.71K ﹤0.01% 896
2023
Q1 		$3.19M Buy
13,634
+7,737
+131% +$1.96M ﹤0.01% 1033
2022
Q4 		$1.49M Buy
+5,897
New +$1.26M ﹤0.01% 1195
2022
Q3 		– Sell
-5,501
Closed -$1.01M – 2364
2022
Q2 		$1.01M Sell
5,501
-6
-0.1% -$1.2K ﹤0.01% 1314
2022
Q1 		$1.41M Buy
5,507
+2
+0% +$457 ﹤0.01% 1369
2021
Q4 		$1.27M Buy
5,505
+2,768
+101% +$676K ﹤0.01% 1414
2021
Q3 		$638K Buy
+2,737
New +$571K ﹤0.01% 1513

Other funds holding INSP

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
DM
Deerfield Management New York $9.59B AUM 113.36% 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
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $33.3B AUM 44.76% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return

Janus Henderson Group's INSP Position: Q1 2026 in Review

Janus Henderson Group reduced its Inspire Medical Systems (INSP) stake by 98% in Q1 2026, selling an estimated $38.4M and leaving 13,451 shares worth $694K. The position accounts for ﹤0.01% of the portfolio, ranked #1855.

Janus Henderson Group first reported a position in INSP in Q3 2021 and has held it in 18 quarters since. The position peaked at $106M in Q3 2024. 301 funds tracked by Wall St. Rank hold INSP as of Q1 2026.

  • Janus Henderson Group held 13,451 shares of Inspire Medical Systems worth $694K as of Q1 2026.
  • Janus Henderson Group sold 548,880 Inspire Medical Systems shares in Q1 2026, an estimated $38.4M.
  • Inspire Medical Systems made up ﹤0.01% of Janus Henderson Group's portfolio in Q1 2026, its #1855 holding.
  • Janus Henderson Group first reported a position in Inspire Medical Systems in Q3 2021 and has held it in 18 quarters since.
  • Janus Henderson Group's Inspire Medical Systems position peaked at $106M in Q3 2024.
  • 301 funds tracked by Wall St. Rank held Inspire Medical Systems as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.