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Atom Investors’s Insmed INSM Stock Holding History

Atom Investors’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
Q2 		$2.6M Buy
24,374
+8,606
+55% +$1.04M 0.23% 113
2026
Q1 		$2.58M Buy
+15,768
New +$2.42M 0.18% 190
2025
Q1 		– Sell
-2,947
Closed -$203K – 569
2024
Q4 		$203K Buy
+2,947
New +$212K 0.03% 419
2024
Q2 		– Sell
-9,324
Closed -$253K – 570
2024
Q1 		$253K Sell
9,324
-2,440
-21% -$68.3K 0.03% 444
2023
Q4 		$365K Sell
11,764
-437
-4% -$11.3K 0.06% 327
2023
Q3 		$308K Sell
12,201
-30,512
-71% -$698K 0.07% 319
2023
Q2 		$901K Buy
42,713
+2,489
+6% +$47.2K 0.34% 66
2023
Q1 		$686K Buy
40,224
+17,293
+75% +$336K 0.37% 71
2022
Q4 		$458K Sell
22,931
-21,277
-48% -$411K 0.23% 95
2022
Q3 		$952K Buy
44,208
+27,214
+160% +$652K 0.33% 95
2022
Q2 		$335K Sell
16,994
-4,830
-22% -$101K 0.15% 141
2022
Q1 		$513K Sell
21,824
-21,620
-50% -$502K 0.24% 96
2021
Q4 		$1.18M Buy
+43,444
New +$1.24M 0.2% 95
2019
Q4 		– Sell
-296,365
Closed -$5.23M – 267
2019
Q3 		$5.23M Sell
296,365
-190,610
-39% -$3.68M 0.36% 98
2019
Q2 		$12.5M Buy
486,975
+159,391
+49% +$4.44M 0.81% 25
2019
Q1 		$9.52M Sell
327,584
-482,300
-60% -$12.5M 0.81% 30
2018
Q4 		$10.6M Buy
+809,884
New +$12.9M 1.05% 16

Other funds holding INSM

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
BBA
Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
DGM
Darwin Global Management St. Helier, Jersey $3.76B AUM 342.13% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return
OAG
Orbis Allan Gray Hamilton, Bermuda $29.1B AUM 60.8% 1-Year Est. Return

Atom Investors's INSM Position: Q2 2026 in Review

Atom Investors increased its Insmed (INSM) stake by 55% in Q2 2026, buying an estimated $1.04M and bringing the position to 24,374 shares worth $2.6M. The position accounts for 0.23% of the portfolio, ranked #113.

Atom Investors first reported a position in INSM in Q4 2018 and has held it in 17 quarters since. The position peaked at $12.5M in Q2 2019. 666 funds tracked by Wall St. Rank hold INSM as of Q2 2026.

  • Atom Investors held 24,374 shares of Insmed worth $2.6M as of Q2 2026.
  • Atom Investors bought 8,606 Insmed shares in Q2 2026, an estimated $1.04M.
  • Insmed made up 0.23% of Atom Investors's portfolio in Q2 2026, its #113 holding.
  • Atom Investors first reported a position in Insmed in Q4 2018 and has held it in 17 quarters since.
  • Atom Investors's Insmed position peaked at $12.5M in Q2 2019.
  • 666 funds tracked by Wall St. Rank held Insmed as of Q2 2026.

Based on Atom Investors's 13F filing for Q2 2026, filed 14 Aug 2026.