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United States Biotechnology & Medical Research

Insmed Inc (INSM)

Track

Over the last 90 days, Insmed Inc. has seen significant insider selling, with a net value of over $7.2 million. Executives have been the primary sellers. This activity coincides with a notable stock price decline of approximately 30.8% over the same period. No insider purchases were recorded.
Stock chart
Ticker: INSM Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Smith Michael Alexander
Chief Legal Officer
1 sale — total 100,000 USD
Planned sale 22 Jun 2026
Value US$50,657.88 | Price 186.16 | Shares 98,481
Proposed sale 22 Jun 2026
Value US$3,386,710.15 | Price 193.83 | Shares 59,652
Proposed sale 22 Jun 2026
Value US$1,907,456.30 | Price 91.10 | Shares 19,740
Planned sale 8 Jun 2026
Value US$100,000.00 | Price 94.03 | Shares 1,000
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 94.03 | Shares 1,000
Proposed sale 5 Jun 2026
Value US$100,000.00 | Price 103.77 | Shares 1,000
Proposed sale 5 Jun 2026
Value US$100,000.00 | Price 103.77 | Shares 1,000
Planned sale 5 Jun 2026
Value US$100,000.00 | Price 103.78 | Shares 1,000
Planned sale 5 Jun 2026
Value US$100,000.00 | Price 103.78 | Shares 1,000
Sale 3 Jun 2026
Value US$100,000.00 | Price 102.27 | Shares 1,000
Sale 3 Jun 2026
Value US$100,000.00 | Price 102.27 | Shares 1,000
Sale 3 Jun 2026
Value US$100,000.00 | Price 102.27 | Shares 1,000
Sale 3 Jun 2026
Value US$100,000.00 | Price 102.27 | Shares 1,000
Sale 3 Jun 2026
Value US$100,000.00 | Price 102.27 | Shares 1,000
Sale 3 Jun 2026
Value US$100,000.00 | Price 102.27 | Shares 1,000
Sale 3 Jun 2026
Value US$100,000.00 | Price 102.27 | Shares 1,000
Sale 3 Jun 2026
Value US$100,000.00 | Price 102.27 | Shares 1,000
Sale 3 Jun 2026
Value US$100,000.00 | Price 102.27 | Shares 1,000
Proposed sale 3 Jun 2026
Value US$245,857.00 | Price 102.27 | Shares 2,404
Proposed sale 3 Jun 2026
Value US$262,424.00 | Price 102.27 | Shares 2,566
Proposed sale 3 Jun 2026
Value US$242,379.00 | Price 102.27 | Shares 2,370
Proposed sale 3 Jun 2026
Value US$220,800.00 | Price 102.27 | Shares 2,159
Proposed sale 3 Jun 2026
Value US$777,763.00 | Price 102.27 | Shares 7,605
Proposed sale 22 May 2026
Value US$666,951.00 | Price 108.46 | Shares 6,149
Planned sale 22 May 2026
Value US$666,982.03 | Price 108.47 | Shares 6,149
Planned sale 18 May 2026
Value US$853,085.75 | Price 106.97 | Shares 7,975
Planned sale 18 May 2026
Value US$1,259,232.04 | Price 106.39 | Shares 11,836
Planned sale 18 May 2026
Value US$605,905.96 | Price 105.32 | Shares 5,753
Proposed sale 18 May 2026
Value US$2,718,106.00 | Price 106.33 | Shares 25,564
Planned sale 14 May 2026
Value US$1,231,701.66 | Price 117.54 | Shares 10,479
Proposed sale 14 May 2026
Value US$1,231,599.00 | Price 117.53 | Shares 10,479
Sale 13 May 2026
Value US$477,383.62 | Price 116.18 | Shares 4,109
Sale 13 May 2026
Value US$961,040.96 | Price 116.18 | Shares 8,272
Sale 13 May 2026
Value US$1,543,218.94 | Price 116.18 | Shares 13,283
Sale 13 May 2026
Value US$678,142.66 | Price 116.18 | Shares 5,837
Sale 13 May 2026
Value US$393,153.12 | Price 116.18 | Shares 3,384
Sale 13 May 2026
Value US$504,037.20 | Price 112.76 | Shares 4,470
Proposed sale 13 May 2026
Value US$678,142.00 | Price 116.18 | Shares 5,837
Proposed sale 13 May 2026
Value US$477,383.00 | Price 116.18 | Shares 4,109
Proposed sale 13 May 2026
Value US$897,145.00 | Price 114.23 | Shares 7,854
Proposed sale 13 May 2026
Value US$961,040.00 | Price 116.18 | Shares 8,272
Proposed sale 13 May 2026
Value US$1,543,218.00 | Price 116.18 | Shares 13,283
Planned sale 11 May 2026
Value US$83,979.40 | Price 101.18 | Shares 830
Planned sale 11 May 2026
Value US$1,216,141.65 | Price 100.35 | Shares 12,119
Proposed sale 11 May 2026
Value US$1,300,105.00 | Price 100.40 | Shares 12,949
Planned sale 4 May 2026
Value US$53,187.60 | Price 139.60 | Shares 381
Planned sale 4 May 2026
Value US$173,445.23 | Price 139.09 | Shares 1,247
Planned sale 4 May 2026
Value US$375,117.06 | Price 137.86 | Shares 2,721
Planned sale 4 May 2026
Value US$728,619.18 | Price 137.01 | Shares 5,318
Planned sale 4 May 2026
Value US$80,972.82 | Price 135.18 | Shares 599
Planned sale 4 May 2026
Value US$58,099.94 | Price 134.18 | Shares 433
Proposed sale 4 May 2026
Value US$1,469,481.00 | Price 137.35 | Shares 10,699
Planned sale 16 Apr 2026
Value US$120,276.75 | Price 145.79 | Shares 825
Planned sale 16 Apr 2026
Value US$326,208.30 | Price 144.66 | Shares 2,255
Planned sale 16 Apr 2026
Value US$772,691.13 | Price 143.81 | Shares 5,373
Planned sale 16 Apr 2026
Value US$321,155.54 | Price 142.99 | Shares 2,246
Proposed sale 16 Apr 2026
Value US$1,540,292.00 | Price 143.97 | Shares 10,699
Planned sale 6 Apr 2026
Value US$235,190.34 | Price 164.01 | Shares 1,434
Planned sale 6 Apr 2026
Value US$1,383,863.94 | Price 163.23 | Shares 8,478
Planned sale 6 Apr 2026
Value US$127,281.51 | Price 161.73 | Shares 787
Proposed sale 6 Apr 2026
Value US$1,746,319.00 | Price 163.22 | Shares 10,699
Planned sale 1 Apr 2026
Value US$10,283,642.80 | Price 164.95 | Shares 62,344
Planned sale 1 Apr 2026
Value US$3,118,254.11 | Price 164.11 | Shares 19,001
Planned sale 1 Apr 2026
Value US$1,095,753.70 | Price 163.18 | Shares 6,715
Proposed sale 1 Apr 2026
Value US$14,465,616.00 | Price 164.27 | Shares 88,060
Planned sale 30 Mar 2026
Value US$2,964,945.24 | Price 150.98 | Shares 19,638
Proposed sale 30 Mar 2026
Value US$2,964,929.00 | Price 150.98 | Shares 19,638
Planned sale 19 Mar 2026
Value US$653,250.63 | Price 144.11 | Shares 4,533
Planned sale 19 Mar 2026
Value US$650,696.54 | Price 143.42 | Shares 4,537
Planned sale 19 Mar 2026
Value US$231,594.93 | Price 142.17 | Shares 1,629
Proposed sale 19 Mar 2026
Value US$1,535,514.00 | Price 143.52 | Shares 10,699
Proposed sale 5 Mar 2026
Value US$1,562,311.00 | Price 146.02 | Shares 10,699
Planned sale 5 Mar 2026
Value US$313,965.12 | Price 147.54 | Shares 2,128
Planned sale 5 Mar 2026
Value US$571,827.34 | Price 146.66 | Shares 3,899
Planned sale 5 Mar 2026
Value US$376,104.03 | Price 145.27 | Shares 2,589
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-24 2026-06-22 PlS Planned sale
3.3
Smith Michael Alexander

Chief Legal Officer

Officer
98,481 +10.4%
186.16
US$50,658 		98,481 +10.4% 186.16 US$50,658
2026-06-22 2026-06-22 PrS Proposed sale
3.3
Michael Smith

Officer

Officer
59,652
193.83
US$3,386,710 		59,652 193.83 US$3,386,710
2026-06-22 2026-06-22 PrS Proposed sale
3.3
Michael Smith

Officer

Officer
19,740
91.10
US$1,907,456 		19,740 91.10 US$1,907,456
2026-06-10 2026-06-08 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
1,000 -2.5%
94.03
US$100,000 		1,000 -2.5% 94.03 US$100,000
2026-06-08 2026-06-08 PrS Proposed sale
3.3
William Lewis

Officer

Officer
1,000
94.03
US$100,000 		1,000 94.03 US$100,000
2026-06-05 2026-06-05 PrS Proposed sale
2.7
Martina Flammer

Officer

Officer
1,000
103.77
US$100,000 		1,000 103.77 US$100,000
2026-06-05 2026-06-05 PrS Proposed sale
2.7
Martina Flammer

Officer

Officer
1,000
103.77
US$100,000 		1,000 103.77 US$100,000
2026-06-05 2026-06-05 PlS Planned sale
2.7
Flammer Martina M.D.

Chief Medical Officer

Officer
1,000 -3.0%
103.78
US$100,000 		1,000 -3.0% 103.78 US$100,000
2026-06-05 2026-06-05 PlS Planned sale
2.7
Flammer Martina M.D.

Chief Medical Officer

Officer
1,000 -3.0%
103.78
US$100,000 		1,000 -3.0% 103.78 US$100,000
2026-06-05 2026-06-03 S Sale
2.9
Bonstein Sara

Chief Financial Officer

Officer
1,000 -3.4%
102.27
US$100,000 		1,000 -3.4% 102.27 US$100,000
2026-06-05 2026-06-03 S Sale
2.9
Bonstein Sara

Chief Financial Officer

Officer
1,000 -3.4%
102.27
US$100,000 		1,000 -3.4% 102.27 US$100,000
2026-06-05 2026-06-03 S Sale
2.7
Adsett Roger

Chief Operating Officer

Officer
1,000 -2.3%
102.27
US$100,000 		1,000 -2.3% 102.27 US$100,000
2026-06-05 2026-06-03 S Sale
2.7
Adsett Roger

Chief Operating Officer

Officer
1,000 -2.3%
102.27
US$100,000 		1,000 -2.3% 102.27 US$100,000
2026-06-05 2026-06-03 S Sale
2.7
Flammer Martina M.D.

Chief Medical Officer

Officer
1,000 -4.0%
102.27
US$100,000 		1,000 -4.0% 102.27 US$100,000
2026-06-05 2026-06-03 S Sale
2.7
Flammer Martina M.D.

Chief Medical Officer

Officer
1,000 -4.0%
102.27
US$100,000 		1,000 -4.0% 102.27 US$100,000
2026-06-05 2026-06-03 S Sale
3.3
Smith Michael Alexander

Chief Legal Officer

Officer
1,000 -5.2%
102.27
US$100,000 		1,000 -5.2% 102.27 US$100,000
2026-06-05 2026-06-03 S Sale
3.3
Smith Michael Alexander

Chief Legal Officer

Officer
1,000 -5.2%
102.27
US$100,000 		1,000 -5.2% 102.27 US$100,000
2026-06-05 2026-06-03 S Sale
3.3
Lewis William

Chair and CEO

Executive Director
1,000 -2.8%
102.27
US$100,000 		1,000 -2.8% 102.27 US$100,000
2026-06-03 2026-06-03 PrS Proposed sale
2.9
Sara Bonstein

Officer

Officer
2,404
102.27
US$245,857 		2,404 102.27 US$245,857
2026-06-03 2026-06-03 PrS Proposed sale
2.7
Martina Flammer

Officer

Officer
2,566
102.27
US$262,424 		2,566 102.27 US$262,424
2026-06-03 2026-06-03 PrS Proposed sale
2.7
Roger Adsett

Officer

Officer
2,370
102.27
US$242,379 		2,370 102.27 US$242,379
2026-06-03 2026-06-03 PrS Proposed sale
3.3
Michael Smith

Officer

Officer
2,159
102.27
US$220,800 		2,159 102.27 US$220,800
2026-06-03 2026-06-03 PrS Proposed sale
3.3
William Lewis

Officer

Officer
7,605
102.27
US$777,763 		7,605 102.27 US$777,763
2026-05-22 2026-05-22 PrS Proposed sale
3.3
Michael Smith

Officer

Officer
6,149
108.46
US$666,951 		6,149 108.46 US$666,951
2026-05-22 2026-05-22 PlS Planned sale
3.3
Smith Michael Alexander

Chief Legal Officer

Officer
6,149 -12.9%
108.47
US$666,982 		6,149 -12.9% 108.47 US$666,982
2026-05-20 2026-05-18 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
7,975 -2.8%
106.97
US$853,086 		7,975 -2.8% 106.97 US$853,086
2026-05-20 2026-05-18 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
11,836 -4.0%
106.39
US$1,259,232 		11,836 -4.0% 106.39 US$1,259,232
2026-05-20 2026-05-18 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
5,753 -1.9%
105.32
US$605,906 		5,753 -1.9% 105.32 US$605,906
2026-05-18 2026-05-18 PrS Proposed sale
3.3
William Lewis

Officer

Officer
25,564
106.33
US$2,718,106 		25,564 106.33 US$2,718,106
2026-05-15 2026-05-14 PlS Planned sale
2.7
Flammer Martina M.D.

Chief Medical Officer

Officer
10,479 -13.9%
117.54
US$1,231,702 		10,479 -13.9% 117.54 US$1,231,702
2026-05-14 2026-05-14 PrS Proposed sale
2.7
Martina Flammer

Officer

Officer
10,479
117.53
US$1,231,599 		10,479 117.53 US$1,231,599
2026-05-15 2026-05-13 S Sale
3.3
Smith Michael Alexander

Chief Legal Officer

Officer
4,109 -7.9%
116.18
US$477,384 		4,109 -7.9% 116.18 US$477,384
2026-05-15 2026-05-13 S Sale
2.9
Bonstein Sara

Chief Financial Officer

Officer
8,272 -10.4%
116.18
US$961,041 		8,272 -10.4% 116.18 US$961,041
2026-05-15 2026-05-13 S Sale
3.3
Lewis William

Chair and CEO

Executive Director
13,283 -4.4%
116.18
US$1,543,219 		13,283 -4.4% 116.18 US$1,543,219
2026-05-15 2026-05-13 S Sale
2.7
Adsett Roger

Chief Operating Officer

Officer
5,837 -5.5%
116.18
US$678,143 		5,837 -5.5% 116.18 US$678,143
2026-05-15 2026-05-13 S Sale
2.7
Flammer Martina M.D.

Chief Medical Officer

Officer
3,384 -4.3%
116.18
US$393,153 		3,384 -4.3% 116.18 US$393,153
2026-05-15 2026-05-13 S Sale
2.7
Flammer Martina M.D.

Chief Medical Officer

Officer
4,470 -5.4%
112.76
US$504,037 		4,470 -5.4% 112.76 US$504,037
2026-05-13 2026-05-13 PrS Proposed sale
2.7
Roger Adsett

Officer

Officer
5,837
116.18
US$678,142 		5,837 116.18 US$678,142
2026-05-13 2026-05-13 PrS Proposed sale
3.3
Michael Smith

Officer

Officer
4,109
116.18
US$477,383 		4,109 116.18 US$477,383
2026-05-13 2026-05-13 PrS Proposed sale
2.7
Martina Flammer

Officer

Officer
7,854
114.23
US$897,145 		7,854 114.23 US$897,145
2026-05-13 2026-05-13 PrS Proposed sale
2.9
Sara Bonstein

Officer

Officer
8,272
116.18
US$961,040 		8,272 116.18 US$961,040
2026-05-13 2026-05-13 PrS Proposed sale
3.3
William Lewis

Officer

Officer
13,283
116.18
US$1,543,218 		13,283 116.18 US$1,543,218
2026-05-13 2026-05-11 PlS Planned sale
2.7
Flammer Martina M.D.

Chief Medical Officer

Officer
830 -1.0%
101.18
US$83,979 		830 -1.0% 101.18 US$83,979
2026-05-13 2026-05-11 PlS Planned sale
2.7
Flammer Martina M.D.

Chief Medical Officer

Officer
12,119 -12.6%
100.35
US$1,216,142 		12,119 -12.6% 100.35 US$1,216,142
2026-05-11 2026-05-11 PrS Proposed sale
2.7
Martina Flammer

Officer

Officer
12,949
100.40
US$1,300,105 		12,949 100.40 US$1,300,105
2026-05-06 2026-05-04 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
381 -0.1%
139.60
US$53,188 		381 -0.1% 139.60 US$53,188
2026-05-06 2026-05-04 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
1,247 -0.4%
139.09
US$173,445 		1,247 -0.4% 139.09 US$173,445
2026-05-06 2026-05-04 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
2,721 -0.9%
137.86
US$375,117 		2,721 -0.9% 137.86 US$375,117
2026-05-06 2026-05-04 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
5,318 -1.7%
137.01
US$728,619 		5,318 -1.7% 137.01 US$728,619
2026-05-06 2026-05-04 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
599 -0.2%
135.18
US$80,973 		599 -0.2% 135.18 US$80,973
2026-05-06 2026-05-04 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
433 -0.1%
134.18
US$58,100 		433 -0.1% 134.18 US$58,100
2026-05-04 2026-05-04 PrS Proposed sale
3.3
William Lewis

Officer

Officer
10,699
137.35
US$1,469,481 		10,699 137.35 US$1,469,481
2026-04-17 2026-04-16 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
825 -0.3%
145.79
US$120,277 		825 -0.3% 145.79 US$120,277
2026-04-17 2026-04-16 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
2,255 -0.7%
144.66
US$326,208 		2,255 -0.7% 144.66 US$326,208
2026-04-17 2026-04-16 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
5,373 -1.7%
143.81
US$772,691 		5,373 -1.7% 143.81 US$772,691
2026-04-17 2026-04-16 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
2,246 -0.7%
142.99
US$321,156 		2,246 -0.7% 142.99 US$321,156
2026-04-16 2026-04-16 PrS Proposed sale
3.3
William Lewis

Officer

Officer
10,699
143.97
US$1,540,292 		10,699 143.97 US$1,540,292
2026-04-08 2026-04-06 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
1,434 -0.5%
164.01
US$235,190 		1,434 -0.5% 164.01 US$235,190
2026-04-08 2026-04-06 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
8,478 -2.7%
163.23
US$1,383,864 		8,478 -2.7% 163.23 US$1,383,864
2026-04-08 2026-04-06 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
787 -0.3%
161.73
US$127,282 		787 -0.3% 161.73 US$127,282
2026-04-06 2026-04-06 PrS Proposed sale
3.3
William Lewis

Officer

Officer
10,699
163.22
US$1,746,319 		10,699 163.22 US$1,746,319
2026-04-03 2026-04-01 PlS Planned sale
2.7
Adsett Roger

Chief Operating Officer

Officer
62,344 -36.9%
164.95
US$10,283,643 		62,344 -36.9% 164.95 US$10,283,643
2026-04-03 2026-04-01 PlS Planned sale
2.7
Adsett Roger

Chief Operating Officer

Officer
19,001 -10.1%
164.11
US$3,118,254 		19,001 -10.1% 164.11 US$3,118,254
2026-04-03 2026-04-01 PlS Planned sale
2.7
Adsett Roger

Chief Operating Officer

Officer
6,715 -3.4%
163.18
US$1,095,754 		6,715 -3.4% 163.18 US$1,095,754
2026-04-01 2026-04-01 PrS Proposed sale
2.7
Roger Adsett

Officer

Officer
88,060
164.27
US$14,465,616 		88,060 164.27 US$14,465,616
2026-03-31 2026-03-30 PlS Planned sale
3.3
Smith Michael Alexander

Chief Legal Officer

Officer
19,638 -27.5%
150.98
US$2,964,945 		19,638 -27.5% 150.98 US$2,964,945
2026-03-30 2026-03-30 PrS Proposed sale
3.3
Michael Smith

Officer

Officer
19,638
150.98
US$2,964,929 		19,638 150.98 US$2,964,929
2026-03-20 2026-03-19 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
4,533 -1.5%
144.11
US$653,251 		4,533 -1.5% 144.11 US$653,251
2026-03-20 2026-03-19 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
4,537 -1.5%
143.42
US$650,697 		4,537 -1.5% 143.42 US$650,697
2026-03-20 2026-03-19 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
1,629 -0.5%
142.17
US$231,595 		1,629 -0.5% 142.17 US$231,595
2026-03-19 2026-03-19 PrS Proposed sale
3.3
William Lewis

Officer

Officer
10,699
143.52
US$1,535,514 		10,699 143.52 US$1,535,514
2026-03-05 2026-03-05 PrS Proposed sale
3.3
William Lewis

Officer

Officer
10,699
146.02
US$1,562,311 		10,699 146.02 US$1,562,311
2026-03-05 2026-03-05 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
2,128 -0.7%
147.54
US$313,965 		2,128 -0.7% 147.54 US$313,965
2026-03-05 2026-03-05 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
3,899 -1.3%
146.66
US$571,827 		3,899 -1.3% 146.66 US$571,827
2026-03-05 2026-03-05 PlS Planned sale
3.3
Lewis William

Chair and CEO

Executive Director
2,589 -0.8%
145.27
US$376,104 		2,589 -0.8% 145.27 US$376,104
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