Insmed (INSM) Insider Trading & Ownership

$108.04 -0.33 (-0.31%)

As of 01:11 PM Eastern

Current Insider Ownership Percentage: 2.10%
Number Of Insiders Buying (Last 12 Months): 0
Number Of Insiders Selling (Last 12 Months): 10
Amount Of Insider Selling (Last 12 Months): $152.44M

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INSM Insider Buying and Selling by Quarter

Insmed Insider and Congressional Trades History

Transaction Type

Time Frame

Start Date

End Date

Export

Transaction Date	Insider	Buy/Sell	Number of Shares	Average Share Price	Total Transaction
5/22/2026	Michael Alexander Smith Insider	Sell	6,149	$108.47	$666,982.03
4/16/2026	William Lewis CEO	Sell	10,699	$143.97	$1,540,335.03
4/6/2026	William Lewis CEO	Sell	10,699	$163.22	$1,746,290.78
4/1/2026	Roger Adsett COO	Sell	88,060	$164.63	$14,497,317.80
3/30/2026	Michael Alexander Smith Insider	Sell	19,638	$150.98	$2,964,945.24
3/19/2026	William Lewis CEO	Sell	10,699	$143.52	$1,535,520.48
3/5/2026	William Lewis CEO	Sell	10,699	$146.03	$1,562,374.97
2/19/2026	William Lewis CEO	Sell	10,699	$150.97	$1,615,228.03
2/9/2026	William Lewis CEO	Sell	13,396	$147.79	$1,979,794.84
2/3/2026	Michael Alexander Smith Insider	Sell	640	$156.27	$100,012.80
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2/3/2026	Roger Adsett COO	Sell	791	$156.17	$123,530.47
2/3/2026	Sara Bonstein CFO	Sell	748	$156.34	$116,942.32
2/3/2026	William Lewis CEO	Sell	3,009	$156.34	$470,427.06
1/20/2026	William Lewis CEO	Sell	10,699	$158.93	$1,700,392.07
1/12/2026	William Lewis CEO	Sell	19,215	$169.00	$3,247,335.00
1/8/2026	Michael Alexander Smith Insider	Sell	1,053	$174.17	$183,401.01
1/8/2026	Roger Adsett COO	Sell	2,059	$174.17	$358,616.03
1/8/2026	Sara Bonstein CFO	Sell	1,447	$174.17	$252,023.99
1/8/2026	William Lewis CEO	Sell	3,223	$174.17	$561,349.91
1/7/2026	Michael Alexander Smith Insider	Sell	709	$175.07	$124,124.63
1/7/2026	Roger Adsett COO	Sell	802	$175.07	$140,406.14
1/7/2026	Sara Bonstein CFO	Sell	1,678	$175.07	$293,767.46
1/7/2026	William Lewis CEO	Sell	2,357	$175.07	$412,639.99
1/6/2026	Michael Alexander Smith Insider	Sell	1,396	$173.33	$241,968.68
1/6/2026	Roger Adsett COO	Sell	1,429	$173.33	$247,688.57
1/6/2026	Sara Bonstein CFO	Sell	1,517	$173.33	$262,941.61
1/6/2026	William Lewis CEO	Sell	4,096	$173.33	$709,959.68
1/2/2026	Orlov S Nicole Schaeffer Insider	Sell	87,290	$175.20	$15,293,208.00
12/18/2025	William Lewis CEO	Sell	10,699	$166.97	$1,786,412.03
11/24/2025	Elizabeth M Anderson Director	Sell	5,000	$204.58	$1,022,900.00
11/17/2025	Leo Lee Director	Sell	75,000	$195.90	$14,692,500.00
11/14/2025	Elizabeth M Anderson Director	Sell	10,000	$195.87	$1,958,700.00
11/12/2025	Orlov S Nicole Schaeffer Insider	Sell	30,000	$194.00	$5,820,000.00
11/3/2025	Michael Alexander Smith Insider	Sell	27,130	$183.78	$4,985,951.40
10/3/2025	Gilbert Ray Cisneros, Jr. House (D-CA)	Sell		$157.16	$1,001 - $15,000
9/22/2025	Gilbert Ray Cisneros, Jr. House (D-CA)	Sell		$145.03	$1,001 - $15,000
9/12/2025	Melvin Md Sharoky Director	Sell	10,000	$145.39	$1,453,900.00
9/12/2025	Orlov S Nicole Schaeffer Insider	Sell	76,520	$145.45	$11,129,834.00
9/2/2025	Michael Alexander Smith Insider	Sell	24,272	$143.89	$3,492,498.08
8/20/2025	Melvin Md Sharoky Director	Sell	10,000	$129.50	$1,295,000.00
8/19/2025	Roger Adsett COO	Sell	25,000	$127.58	$3,189,500.00
8/18/2025	William Lewis CEO	Sell	6,865	$128.40	$881,466.00
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8/8/2025	Gilbert Ray Cisneros, Jr. House (D-CA)	Sell		$109.55	$1,001 - $15,000
7/21/2025	Sara Bonstein CFO	Sell	58,400	$102.67	$5,995,928.00
7/15/2025	Michael Alexander Smith Insider	Sell	933	$102.51	$95,641.83
7/15/2025	William Lewis CEO	Sell	6,830	$102.37	$699,187.10
7/11/2025	Michael Alexander Smith Insider	Sell	748	$96.41	$72,114.68
7/7/2025	Sara Bonstein CFO	Sell	57,764	$95.86	$5,537,257.04
7/7/2025	Gilbert Ray Cisneros, Jr. House (D-CA)	Sell		$96.95	$1,001 - $15,000
6/23/2025	Sara Bonstein CFO	Sell	57,765	$101.78	$5,879,321.70
6/16/2025	William Lewis CEO	Sell	129,805	$100.39	$13,031,123.95
6/16/2025	Josh Gottheimer House (D-NJ)	Buy		$101.59	$1,001 - $15,000
6/11/2025	Orlov S Nicole Schaeffer Insider	Sell	99,172	$93.42	$9,264,648.24
6/10/2025	Sara Bonstein CFO	Sell	57,766	$89.12	$5,148,105.92
6/5/2025	Michael Alexander Smith Insider	Sell	1,879	$73.50	$138,106.50
6/4/2025	David W J Mcgirr Director	Sell	3,000	$73.27	$219,810.00
6/3/2025	David W J Mcgirr Director	Sell	3,250	$71.30	$231,725.00
6/3/2025	Martina M.D. Flammer Insider	Sell	1,686	$71.50	$120,549.00
6/3/2025	Michael Alexander Smith Insider	Sell	1,448	$71.50	$103,532.00
6/3/2025	Orlov S Nicole Schaeffer Insider	Sell	1,642	$71.50	$117,403.00
6/3/2025	Roger Adsett COO	Sell	1,860	$71.50	$132,990.00
6/3/2025	Sara Bonstein CFO	Sell	1,579	$71.50	$112,898.50
6/3/2025	William Lewis CEO	Sell	5,472	$71.50	$391,248.00
6/2/2025	William Lewis CEO	Sell	6,830	$71.31	$487,047.30

(Data available from 1/1/2013 forward)

INSM Insider Trading Activity - Frequently Asked Questions

The list of insiders at Insmed includes Clarissa Desjardins, David W J Mcgirr, Elizabeth M Anderson, John Drayton Wise, Leo Lee, Martina M.D. Flammer, Melvin Md Sharoky, Michael Alexander Smith, Orlov S Nicole Schaeffer, Roger Adsett, Sara Bonstein, and William Lewis. Learn more on insiders at INSM.

2.10% of Insmed stock is owned by insiders. Learn more on INSM's insider holdings.

The following insider purchased INSM shares in the last 24 months: Clarissa Desjardins ($201,694.15).

Insiders have purchased a total of 3,025 INSM shares in the last 24 months for a total of $201,694.15 bought.

The following insiders have sold INSM shares in the last 24 months: David W J Mcgirr ($451,535.00), Elizabeth M Anderson ($2,981,600.00), Leo Lee ($14,692,500.00), Martina M.D. Flammer ($10,104,851.84), Melvin Md Sharoky ($2,748,900.00), Michael Alexander Smith ($15,567,160.89), Orlov S Nicole Schaeffer ($52,022,981.89), Roger Adsett ($26,964,878.13), Sara Bonstein ($40,464,323.32), and William Lewis ($56,522,121.16).

Insiders have sold a total of 2,139,157 Insmed shares in the last 24 months for a total of $222,520,852.23 sold.

Josh Gottheimer (D-NJ) has bought shares of Insmed in the last year totaling $8,000. Gilbert Ray Cisneros, Jr. (D-CA) has sold shares totaling $32,000.

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This page (NASDAQ:INSM) was last updated on 5/29/2026 by MarketBeat.com Staff.

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Insmed (INSM) Insider Trading & Ownership

INSM Insider Buying and Selling by Quarter

Insmed Insider and Congressional Trades History

INSM Insider Trading Activity - Frequently Asked Questions

Insmed Active Insiders

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Insmed (INSM) Insider Trading & Ownership

Insmed (NASDAQ:INSM) Insider Buying and Selling Activity

INSM Insider Buying and Selling by Quarter

Insmed Insider and Congressional Trades History

INSM Insider Trading Activity - Frequently Asked Questions

Who is on Insmed's Insider Roster?

What percentage of Insmed stock is owned by insiders?

Which Insmed insiders have been buying company stock?

How much insider buying is happening at Insmed?

Which Insmed insiders have been selling company stock?

How much insider selling is happening at Insmed?

Which members of congress are trading Insmed?

Insmed Active Insiders

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