Janus Henderson Group
INSM icon

Janus Henderson Group’s Insmed INSM Stock Holding History

Janus Henderson Group’s Portfolio INSM Stock Details INSM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$68.6M Sell
419,304
-381,251
-48% -$58.6M 0.03% 349
2025
Q4 		$139M Sell
800,555
-402,228
-33% -$73.4M 0.06% 232
2025
Q3 		$173M Sell
1,202,783
-1,090,359
-48% -$134M 0.08% 205
2025
Q2 		$231M Buy
2,293,142
+747,723
+48% +$57.2M 0.11% 176
2025
Q1 		$121M Buy
1,545,419
+99,723
+7% +$7.63M 0.07% 239
2024
Q4 		$99.8M Sell
1,445,696
-43,208
-3% -$3.11M 0.05% 277
2024
Q3 		$109M Sell
1,488,904
-602,874
-29% -$44.5M 0.06% 265
2024
Q2 		$140M Sell
2,091,778
-137,685
-6% -$5.34M 0.08% 220
2024
Q1 		$60.5M Buy
2,229,463
+826,372
+59% +$23.1M 0.03% 349
2023
Q4 		$43.5M Sell
1,403,091
-511,711
-27% -$13.3M 0.03% 406
2023
Q3 		$48.3M Sell
1,914,802
-280,386
-13% -$6.41M 0.03% 366
2023
Q2 		$46.3M Sell
2,195,188
-365,981
-14% -$6.94M 0.03% 401
2023
Q1 		$43.7M Sell
2,561,169
-435,083
-15% -$8.45M 0.03% 404
2022
Q4 		$59.9M Sell
2,996,252
-3,846,400
-56% -$74.3M 0.04% 334
2022
Q3 		$147M Sell
6,842,652
-157,685
-2% -$3.78M 0.06% 285
2022
Q2 		$138M Sell
7,000,337
-677,929
-9% -$14.2M 0.1% 211
2022
Q1 		$180M Sell
7,678,266
-203,292
-3% -$4.72M 0.09% 219
2021
Q4 		$215M Sell
7,881,558
-106,341
-1% -$3.04M 0.09% 221
2021
Q3 		$220M Buy
7,987,899
+35,898
+0.5% +$942K 0.1% 218
2021
Q2 		$226M Buy
7,952,001
+1,733,425
+28% +$51.4M 0.1% 215
2021
Q1 		$212M Buy
6,218,576
+396,163
+7% +$15.1M 0.1% 215
2020
Q4 		$194M Sell
5,822,413
-346,754
-6% -$12.7M 0.09% 224
2020
Q3 		$198M Sell
6,169,167
-3,073,205
-33% -$88.3M 0.1% 204
2020
Q2 		$255M Buy
9,242,372
+411,016
+5% +$9.74M 0.14% 162
2020
Q1 		$142M Sell
8,831,356
-2,835,922
-24% -$67.2M 0.1% 218
2019
Q4 		$279M Sell
11,667,278
-453,301
-4% -$9.22M 0.14% 164
2019
Q3 		$214M Buy
12,120,579
+456,389
+4% +$8.81M 0.12% 198
2019
Q2 		$299M Buy
11,664,190
+361,756
+3% +$10.1M 0.16% 157
2019
Q1 		$329M Sell
11,302,434
-119,027
-1% -$3.08M 0.18% 138
2018
Q4 		$150M Buy
11,421,461
+2,116,129
+23% +$33.8M 0.1% 262
2018
Q3 		$188M Buy
9,305,332
+1,850,394
+25% +$41.8M 0.1% 241
2018
Q2 		$176M Buy
7,454,938
+1,208,596
+19% +$31.1M 0.1% 247
2018
Q1 		$141M Buy
6,246,342
+283,136
+5% +$7.45M 0.08% 279
2017
Q4 		$186M Buy
5,963,206
+2,002,458
+51% +$59.2M 0.11% 219
2017
Q3 		$124M Buy
3,960,748
+2,312,045
+140% +$44M 0.08% 313
2017
Q2 		$28.3M Buy
+1,648,703
New +$28.2M 0.02% 659
2015
Q2 		– Sell
-75,000
Closed -$1.56M – 872
2015
Q1 		$1.56M Buy
+75,000
New +$1.32M 0.01% 576

Other funds holding INSM

JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
DGM
Darwin Global Management St. Helier, Jersey $3.77B AUM 307.72% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
BBA
Baker Bros. Advisors New York $17.4B AUM 131.5% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

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

Janus Henderson Group reduced its Insmed (INSM) stake by 48% in Q1 2026, selling an estimated $58.6M and leaving 419,304 shares worth $68.6M. The position accounts for 0.03% of the portfolio, ranked #349.

Janus Henderson Group first reported a position in INSM in Q1 2015 and has held it in 37 quarters since. The position peaked at $329M in Q1 2019. 669 funds tracked by Wall St. Rank hold INSM as of Q1 2026.

  • Janus Henderson Group held 419,304 shares of Insmed worth $68.6M as of Q1 2026.
  • Janus Henderson Group sold 381,251 Insmed shares in Q1 2026, an estimated $58.6M.
  • Insmed made up 0.03% of Janus Henderson Group's portfolio in Q1 2026, its #349 holding.
  • Janus Henderson Group first reported a position in Insmed in Q1 2015 and has held it in 37 quarters since.
  • Janus Henderson Group's Insmed position peaked at $329M in Q1 2019.
  • 669 funds tracked by Wall St. Rank held Insmed as of Q1 2026.

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