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Insmed Inc. planned insider sales

In the last twelve months insiders at Insmed Inc. filed 72 Form 144 notices of planned sales, 1.1 million shares worth $166.8 million at the time of filing, from 11 sellers. The latest, filed 10 September 2026: Brennan David R (director), 25,000 shares worth $3.1 million, planned for around 9 September 2026 through Wells Fargo Clearing Services.

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
10 September 2026Brennan David RDirector25,000$3.1 million9 September 202625,000 shares from 9 September 2026Wells Fargo Clearing ServicesEquity grantForm 144
17 August 2026Melvin SharokyDirector5,000$637,63717 August 20265,000 shares from 17 August 2026MERRILL LYNCHPURCHASEDForm 144
10 August 2026Roger AdsettOfficer239,850$32.0 million10 August 2026239,850 shares from 10 August 2026Merrill LynchStock Plan ActivityForm 144
6 August 2026Martina FlammerOfficer27,173$3.5 million6 August 202627,173 shares from 6 August 2026Merrill LynchStock Plan ActivityForm 144
23 July 2026William LewisOfficer10,700$1.1 million23 July 202610,700 shares from 23 July 2026Merrill LynchStock Plan ActivityForm 144
9 July 2026William LewisOfficer10,699$1.3 million9 July 202610,699 shares from 9 July 2026Merrill LynchStock Plan ActivityForm 144
6 July 2026Martina FlammerOfficer12,302$1.4 million6 July 202612,302 shares from 6 July 2026Merrill LynchStock Plan ActivityForm 144
25 June 2026William LewisOfficer21,398$2.2 million25 June 202621,398 shares from 25 June 2026Merrill LynchStock Plan ActivityForm 144
22 June 2026Michael SmithOfficer1,806$173,03922 June 20261,806 shares from 22 June 2026Merrill LynchStock Plan ActivityForm 144
8 June 2026William LewisOfficer6,515$612,5768 June 20266,515 shares from 8 June 2026Merrill LynchStock Plan ActivityForm 144
5 June 2026Martina FlammerOfficer1,858$192,8115 June 20261,858 shares from 5 June 2026Merrill LynchStock Plan ActivityForm 144
3 June 2026Michael SmithOfficer2,159$220,8003 June 20262,159 shares from 3 June 2026Merrill LynchStock Plan ActivityForm 144
3 June 2026Roger AdsettOfficer2,370$242,3793 June 20262,370 shares from 3 June 2026Merrill LynchStock Plan ActivityForm 144
3 June 2026Sara BonsteinOfficer2,404$245,8573 June 20262,404 shares from 3 June 2026Merrill LynchStock plan activityForm 144
3 June 2026Martina FlammerOfficer2,566$262,4243 June 20262,566 shares from 3 June 2026Merrill LynchStock Plan ActivityForm 144
3 June 2026William LewisOfficer7,605$777,7633 June 20267,605 shares from 3 June 2026Merrill LynchStock Plan ActivityForm 144
22 May 2026Michael SmithOfficer6,149$666,95122 May 20266,149 shares from 22 May 2026Merrill LynchStock plan activityForm 144
18 May 2026William LewisOfficer25,564$2.7 million18 May 202625,564 shares from 18 May 2026Merrill LynchStock Plan ActivityForm 144
14 May 2026Martina FlammerOfficer10,479$1.2 million14 May 202618,333 shares from 13 May 2026Merrill LynchStock Plan ActivityForm 144
13 May 2026Michael SmithOfficer4,109$477,38313 May 20264,109 shares from 13 May 2026Merrill LynchStock Plan ActivityForm 144
13 May 2026Roger AdsettOfficer5,837$678,14213 May 20265,837 shares from 13 May 2026Merrill LynchStock Plan ActivityForm 144
13 May 2026Martina FlammerOfficer7,854$897,14513 May 2026No matching Form 4 saleMerrill LynchStock plan activityForm 144
13 May 2026Sara BonsteinOfficer8,272$961,04013 May 20268,272 shares from 13 May 2026Merrill LynchStock plan activityForm 144
13 May 2026William LewisOfficer13,283$1.5 million13 May 202613,283 shares from 13 May 2026Merrill LynchStock Plan ActivityForm 144
11 May 2026Martina FlammerOfficer12,949$1.3 million11 May 202612,949 shares from 11 May 2026Merrill LynchStock Plan ActivityForm 144
4 May 2026William LewisOfficer10,699$1.5 million4 May 202610,699 shares from 4 May 2026Merrill LynchStock Plan ActivityForm 144
16 April 2026William LewisOfficer10,699$1.5 million16 April 202610,699 shares from 16 April 2026Merrill LynchStock Plan ActivityForm 144
6 April 2026William LewisOfficer10,699$1.7 million6 April 202610,699 shares from 6 April 2026Merrill LynchStock Plan ActivityForm 144
1 April 2026Roger AdsettOfficer88,060$14.5 million1 April 202688,060 shares from 1 April 2026Merrill LynchStock Plan ActivityForm 144
30 March 2026Michael SmithOfficer19,638$3.0 million30 March 202619,638 shares from 30 March 2026Merrill LynchStock Plan ActivityForm 144
19 March 2026William LewisOfficer10,699$1.5 million19 March 202610,699 shares from 19 March 2026Merrill LynchStock Plan ActivityForm 144
5 March 2026William LewisOfficer10,699$1.6 million5 March 202610,699 shares from 5 March 2026Merrill LynchStock Plan ActivityForm 144
24 February 2026Michael SmithOfficer24,774$3.9 million24 February 202624,774 shares from 24 February 2026Merrill LynchStock Plan ActivityForm 144
19 February 2026William LewisOfficer10,699$1.6 million19 February 202610,699 shares from 19 February 2026Merrill LynchStock Plan ActivityForm 144
9 February 2026William LewisOfficer13,396$2.0 million9 February 202613,396 shares from 9 February 2026Merrill LynchStock Plan ActivityForm 144
5 February 2026Martina FlammerOfficer869$132,4625 February 2026869 shares from 5 February 2026Merrill LynchStock Plan ActivityForm 144
3 February 2026Michael SmithOfficer640$100,0123 February 2026640 shares from 3 February 2026Merrill LynchStock Plan ActivityForm 144
3 February 2026Sara BonsteinOfficer748$116,9383 February 2026748 shares from 3 February 2026Merrill LynchStock Plan ActivityForm 144
3 February 2026Roger AdsettOfficer791$123,5263 February 2026791 shares from 3 February 2026Merrill LynchStock Plan ActivityForm 144
3 February 2026Martina FlammerOfficer795$123,8373 February 20268,777 shares from 2 February 2026Merrill LynchStock Plan ActivityForm 144
3 February 2026William LewisOfficer3,009$470,4123 February 20263,009 shares from 3 February 2026Merrill LynchStock Plan ActivityForm 144
2 February 2026Martina FlammerOfficer7,982$1.2 million2 February 2026No matching Form 4 saleMerrill LynchStock Plan ActivityForm 144
20 January 2026William LewisOfficer10,699$1.7 million20 January 202610,699 shares from 20 January 2026Merrill LynchStock Plan ActivityForm 144
12 January 2026William LewisOfficer19,215$3.2 million12 January 202619,215 shares from 12 January 2026Merrill LynchStock Plan ActivityForm 144
8 January 2026Michael SmithOfficer1,053$183,4018 January 20261,762 shares from 7 January 2026Merrill LynchStock Plan ActivityForm 144
8 January 2026Sara BonsteinOfficer1,447$252,0238 January 20263,125 shares from 7 January 2026Merrill LynchStock Plan ActivityForm 144
8 January 2026Martina FlammerOfficer1,660$288,6748 January 2026No matching Form 4 saleMerrill LynchStock Plan ActivityForm 144
8 January 2026Roger AdsettOfficer2,059$358,6168 January 20262,861 shares from 7 January 2026Merrill LynchStock Plan ActivityForm 144
8 January 2026William LewisOfficer3,223$561,3498 January 20265,580 shares from 7 January 2026Merrill LynchStock Plan ActivityForm 144
8 January 2026Martina FlammerOfficer5,138$894,8858 January 20268,232 shares from 7 January 2026Merrill LynchStock Plan ActivityForm 144
7 January 2026Michael SmithOfficer709$124,1247 January 20261,396 shares from 6 January 2026Merrill LynchStock Plan ActivityForm 144
7 January 2026Roger AdsettOfficer802$140,4067 January 20261,429 shares from 6 January 2026Merrill LynchStock Plan ActivityForm 144
7 January 2026Martina FlammerOfficer1,434$252,1547 January 202610,185 shares from 6 January 2026Merrill LynchStock Plan ActivityForm 144
7 January 2026Sara BonsteinOfficer1,678$293,9357 January 20261,517 shares from 6 January 2026Merrill LynchStock Plan ActivityForm 144
7 January 2026William LewisOfficer2,357$412,6367 January 20264,096 shares from 6 January 2026Merrill LynchStock Plan ActivityForm 144
6 January 2026Michael SmithOfficer1,396$241,9696 January 2026No matching Form 4 saleMerrill LynchStock Plan ActivityForm 144
6 January 2026Roger AdsettOfficer1,429$247,6886 January 2026No matching Form 4 saleMerrill LynchStock Plan ActivityForm 144
6 January 2026Sara BonsteinOfficer1,517$262,9416 January 2026No matching Form 4 saleMerrill LynchStock Plan ActivityForm 144
6 January 2026Martina FlammerOfficer1,615$279,9276 January 202612,303 shares from 5 January 2026Merrill LynchStock Plan ActivityForm 144
6 January 2026William LewisOfficer4,096$709,9596 January 2026No matching Form 4 saleMerrill LynchStock Plan ActivityForm 144
5 January 2026Martina FlammerOfficer20,873$3.6 million5 January 2026No matching Form 4 saleMerrill LynchStock Plan ActivityForm 144
2 January 2026Stacey Nicole Schaeffer OrlovOfficer87,290$15.3 million2 January 202687,290 shares from 2 January 2026Merrill LynchStock Plan ActivityForm 144
18 December 2025William LewisOfficer10,699$1.8 million18 December 202510,699 shares from 18 December 2025Merrill LynchStock Plan ActivityForm 144
5 December 2025Melvin SharokyDirector20,000$4.1 million5 December 202520,000 shares from 5 December 2025MERRILL LYNCHVESTED RSUForm 144
4 December 2025William LewisOfficer10,699$2.2 million4 December 202510,699 shares from 4 December 2025Merrill LynchStock Plan ActivityForm 144
1 December 2025Martina FlammerOfficer8,895$1.8 million1 December 20258,895 shares from 1 December 2025Merrill LynchStock Plan ActivityForm 144
24 November 2025Anderson Elizabeth MDirector5,000$1.0 million24 November 20255,000 shares from 24 November 2025Fidelity Brokerage Services LLCStock AwardForm 144
17 November 2025Leo LeeDirector75,000$14.5 million17 November 202575,000 shares from 17 November 2025J.P. Morgan Securities LLCOpen Market Purchase; RSU VestingForm 144
13 November 2025Anderson Elizabeth MDirector10,000$1.9 million13 November 202510,000 shares from 14 November 2025FIDELITY BROKERAGE SERVICES LLCStock AwardForm 144
12 November 2025Stacey Nicole Schaeffer OrlovOfficer30,000$5.8 million12 November 202530,000 shares from 12 November 2025Merrill LynchStock Plan ActivityForm 144
12 November 2025Martina FlammerOfficer31,226$5.9 million11 November 202531,226 shares from 11 November 2025Merrill LynchStock Plan ActivityForm 144
3 November 2025Michael A SmithOfficer27,130$5.0 million3 November 202527,130 shares from 3 November 2025Merrill LynchStock Plan ActivityForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Sold, per Form 4: the same seller's open-market sales on Form 4 from the notice's date to 90 days after, added up, as they appear on the insiders page; a holder who files no Form 4, such as some large holders, never shows one. What is a Form 144?