INSM Insmed Incorporated

NASDAQ
$129.41

Insmed Incorporated (INSM) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
+43.75
46 buyers / 18 sellers
STRONG BUYING
Funds compared
65
funds with comparable INSM positions
58 current holders · 45 prior-quarter holders
Net share change
+2.34M
+13.59M added, -11.25M cut
Position activity
20 new 26 increased 11 reduced 7 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
Darwin Global Management Long/Short Reduced -10.37M -61.7% $1.11B 17.9% 81
Maverick Capital Long/Short Growth New +2.15M — $229.3M 2.1% 76
Baker Bros. Advisors Growth Healthcare Increased +1.38M +18.5% $146.6M 4.7% 68
Point72 Asset Management, L.P. New +537.0K — $57.3M 0.1% 66
Vestal Point Capital Growth Healthcare New +250.0K — $26.7M 0.6% 66
Long Focus Capital Management Long/Short Increased +383.0K +264.1% $40.8M 2.3% 63
Affinity Asset Advisors Long/Short Growth Increased +170.0K +35.4% $18.1M 3.5% 61
Balyasny Asset Management L.P. Increased +1.10M +498.3% $117.8M 0.3% 61
RENAISSANCE TECHNOLOGIES LLC Quant Sold Out -20.3K -100.0% $2.2M 0.0% 60
Holocene Advisors, LP New +192.9K — $20.6M 0.0% 60

Most significant buyers

By move score, not size.

  • Maverick Capital New · +2.15M
  • Baker Bros. Advisors Increased · +1.38M
  • Point72 Asset Management, L.P. New · +537.0K
  • Vestal Point Capital New · +250.0K
  • Long Focus Capital Management Increased · +383.0K

Most significant sellers

By move score, not size.

  • Darwin Global Management Reduced · -10.37M
  • RENAISSANCE TECHNOLOGIES LLC Sold Out · -20.3K
  • Castle Hook Partners Reduced · -276.4K
  • Voloridge Investment Management Sold Out · -32.2K
  • Tang Capital Management Reduced · -160.0K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Darwin Global Management 1 6.4M 16.8M -10.37M -61.7% 17.9% Reduced 81
Maverick Capital 2 2.2M 0 +2.15M — 2.1% New 76
Baker Bros. Advisors 1 8.8M 7.4M +1.38M +18.5% 4.7% Increased 68
Point72 Asset Management, L.P. 1 537.0K 0 +537.0K — 0.1% New 66
Vestal Point Capital 1 250.0K 0 +250.0K — 0.6% New 66
Long Focus Capital Management 2 528.0K 145.0K +383.0K +264.1% 2.3% Increased 63
Affinity Asset Advisors 2 650.0K 480.0K +170.0K +35.4% 3.5% Increased 61
Balyasny Asset Management L.P. 2 1.3M 221.7K +1.10M +498.3% 0.3% Increased 61
RENAISSANCE TECHNOLOGIES LLC 1 0 20.3K -20.3K -100.0% 0.0% Sold Out 60
Holocene Advisors, LP 2 192.9K 0 +192.9K — 0.0% New 60
TWO SIGMA INVESTMENTS, LP 2 1.2M 237.0K +1.01M +424.1% 0.1% Increased 59
Caption Management 3 236.0K 0 +236.0K — 0.9% New 59
Qube Research & Technologies Ltd 2 1.7M 148.5K +1.53M +1032.8% 0.2% Increased 58
Tudor Investment Corporation 2 195.4K 0 +195.4K — 0.1% New 58
WORLDQUANT MILLENNIUM ADVISORS LLC 2 69.2K 0 +69.2K — 0.0% New 58
Castle Hook Partners 1 993.3K 1.3M -276.4K -21.8% 1.1% Reduced 58
Hudson Bay Capital Management 3 109.4K 0 +109.4K — 0.1% New 58
Capital Fund Management 3 149.0K 0 +149.0K — 0.1% New 57
ADAR1 Capital Management 3 228.5K 35.4K +193.1K +545.7% 1.2% Increased 57
Jain Global 3 111.2K 0 +111.2K — 0.2% New 57
Samlyn Capital 2 732.6K 417.2K +315.4K +75.6% 1.3% Increased 56
Integral Health Asset Management 2 1.6M 1.5M +100.0K +6.7% 7.0% Increased 56
Voloridge Investment Management 2 0 32.2K -32.2K -100.0% 0.0% Sold Out 56
Squarepoint Ops LLC 2 616.5K 39.3K +577.1K +1468.0% 0.2% Increased 55
Trexquant Investment 3 156.6K 0 +156.6K — 0.1% New 55
Quadrature Capital 3 48.4K 0 +48.4K — 0.1% New 55
Tang Capital Management 2 100.0K 260.0K -160.0K -61.5% 0.5% Reduced 55
Soleus Capital Management 2 90.3K 10.3K +80.0K +780.5% 0.3% Increased 54
Alyeska Investment Group, L.P. 2 190.3K 48.1K +142.1K +295.4% 0.1% Increased 54
Verition Fund Management 2 6.6K 0 +6.6K — 0.0% New 54
Y-Intercept 4 101.9K 0 +101.9K — 0.2% New 53
Caxton Associates 3 4.7K 0 +4.7K — 0.0% New 53
Paradigm BioCapital Advisors 1 1.3M 1.3M +71.5K +5.7% 2.6% Increased 53
MILLENNIUM MANAGEMENT LLC 2 2.0M 1.2M +890.2K +76.9% 0.2% Increased 52
Alphadyne Asset Management 3 0 2.1K -2.1K -100.0% 0.0% Sold Out 51
Boothbay Fund Management 4 47.3K 0 +47.3K — 0.1% New 51
Gotham Asset Management, LLC 2 21.9K 10.0K +11.9K +118.7% 0.0% Increased 50
J. Goldman & Co. 3 0 5.5K -5.5K -100.0% 0.0% Sold Out 50
Aquatic Capital Management 4 10.6K 0 +10.6K — 0.0% New 50
Parallax Volatility Advisers 3 0 150 -150 -100.0% 0.0% Sold Out 50
Cinctive Capital Management 3 162.0K 73.1K +88.9K +121.7% 0.7% Increased 49
Palo Alto Investors 2 414.0K 415.3K -1.3K -0.3% 6.3% Reduced 49
Edgestream Partners 4 0 2.5K -2.5K -100.0% 0.0% Sold Out 49
Quinn Opportunity Partners 4 2.0K 0 +2.0K — 0.0% New 49
Bridgewater Associates 1 455.4K 295.6K +159.8K +54.1% 0.2% Increased 49
Winton Group 4 3.8K 0 +3.8K — 0.0% New 48
Centiva Capital 4 0 2.3K -2.3K -100.0% 0.0% Sold Out 48
CenterBook Partners 4 103.2K 35.2K +67.9K +192.8% 0.5% Increased 47
Walleye Capital 3 1.4K 71.8K -70.4K -98.1% 0.0% Reduced 47
LMR Partners 3 8.4K 3.3K +5.1K +154.5% 0.0% Increased 47
Brevan Howard Capital Management 3 15.7K 3.5K +12.2K +345.2% 0.0% Increased 45
Quantbot Technologies 4 1.5K 0 +1.5K — 0.0% New 45
MARSHALL WACE, LLP 2 501.9K 312.6K +189.4K +60.6% 0.1% Increased 45
Schonfeld Strategic Advisors 3 104.4K 56.1K +48.3K +86.2% 0.1% Increased 44
Rock Springs Capital Management 3 362.2K 314.3K +47.9K +15.2% 1.9% Increased 43
ExodusPoint Capital Management 3 69.5K 148.1K -78.6K -53.1% 0.1% Reduced 38
Man Group 3 52.9K 126.8K -74.0K -58.3% 0.0% Reduced 38
CITADEL ADVISORS LLC 1 2.6M 2.2M +374.4K +17.2% 0.2% Increased 36
D. E. Shaw & Co., Inc. 1 5.9M 5.6M +252.1K +4.5% 0.4% Increased 36
Tremblant Capital Group 2 170.7K 173.6K -3.0K -1.7% 0.5% Reduced 30
ADAGE CAPITAL PARTNERS GP, L.L.C. 2 850.0K 900.0K -50.0K -5.6% 0.1% Reduced 29
Engineers Gate 4 126.0K 158.8K -32.7K -20.6% 0.2% Reduced 26
AQR Capital Management 3 612.8K 675.5K -62.7K -9.3% 0.0% Reduced 24
Woodline Partners LP 2 152.6K 148.5K +4.2K +2.8% 0.1% Increased 24
RTW Investments 1 4.8M 4.8M 0 +0.0% 4.4% Unchanged 50

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.