Insider trading

Period: 12 months Stock: INSM + Add filter Clear all
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When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

72 decisions over 12 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

72 decisions over 12 months
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

72 decisions over 12 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

72 decisions over 12 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
72 decisions over 12 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
72 decisions over 12 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

72 decisions over 12 months
Stock
Insider
Type ?
Why it stands out
9 Sep 2026
Brennan David R Director
Sold at will
$3.10M 25,000 at 124.00
38.9%
Not planned
17 Aug 2026
SHAROKY MELVIN MD Director · indirect
Sold at will
$637.65K 5,000 at 127.53
100%
Sold half or more
10 Aug 2026
Adsett Roger Chief Operating Officer
Sold at will
$31.96M 239,850 at 133.27
70.8%
Sold half or more
6 Aug 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan 2×
$3.49M 27,173 at 128.61
31.0%
Planned (10b5-1)
23 Jul 2026
Lewis William Chair and CEO
Sold on a plan 2×
$1.13M 10,700 at 106.06
4.0%
Planned (10b5-1)
9 Jul 2026
Lewis William Chair and CEO
Sold on a plan 3×
$1.26M 10,699 at 117.40
4.0%
Planned (10b5-1)
6 Jul 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan 2×
$1.35M 12,302 at 109.98
16.9%
Planned (10b5-1)
25 Jun 2026
Lewis William Chair and CEO
Sold on a plan 5×
$2.21M 21,398 at 103.32
7.6%
Planned (10b5-1)
22 Jun 2026
Smith Michael Alexander Chief Legal Officer
Sold on a plan
$173.05K 1,806 at 95.82
4.6%
Planned (10b5-1)
8 Jun 2026
Lewis William Chair and CEO
Sold on a plan
$612.61K 6,515 at 94.03
2.5%
Planned (10b5-1)
5 Jun 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan
$192.82K 1,858 at 103.78
3.0%
Planned (10b5-1)
3 Jun 2026
Lewis William Chair and CEO
Sold at will
$777.76K 7,605 at 102.27
2.8%
Not planned
3 Jun 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan
$262.42K 2,566 at 102.27
4.0%
Planned (10b5-1)
3 Jun 2026
Bonstein Sara Chief Financial Officer
Sold at will
$245.86K 2,404 at 102.27
3.4%
Not planned
3 Jun 2026
Adsett Roger Chief Operating Officer
Sold at will
$242.38K 2,370 at 102.27
2.3%
Not planned
3 Jun 2026
Smith Michael Alexander Chief Legal Officer
Sold at will
$220.80K 2,159 at 102.27
5.2%
Not planned
22 May 2026
Smith Michael Alexander Chief Legal Officer
Sold on a plan
$666.98K 6,149 at 108.47
12.9%
Planned (10b5-1)
18 May 2026
Lewis William Chair and CEO
Sold on a plan 3×
$2.72M 25,564 at 106.33
8.6%
Planned (10b5-1)
14 May 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan
$1.23M 10,479 at 117.54
13.9%
Planned (10b5-1)
13 May 2026
Lewis William Chair and CEO
Sold at will
$1.54M 13,283 at 116.18
4.4%
Not planned
13 May 2026
Bonstein Sara Chief Financial Officer
Sold at will
$961.04K 8,272 at 116.18
10.4%
Not planned
13 May 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan 2×
$897.19K 7,854 at 114.23
9.4%
Planned (10b5-1)
13 May 2026
Adsett Roger Chief Operating Officer
Sold at will
$678.14K 5,837 at 116.18
5.5%
Not planned
13 May 2026
Smith Michael Alexander Chief Legal Officer
Sold at will
$477.38K 4,109 at 116.18
7.9%
Not planned
11 May 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan 2×
$1.30M 12,949 at 100.40
13.5%
Planned (10b5-1)
4 May 2026
Lewis William Chair and CEO
Sold on a plan 6×
$1.47M 10,699 at 137.34
3.4%
Planned (10b5-1)
16 Apr 2026
Lewis William Chair and CEO
Sold on a plan 4×
$1.54M 10,699 at 143.97
3.4%
Planned (10b5-1)
6 Apr 2026
Lewis William Chair and CEO
Sold on a plan 3×
$1.75M 10,699 at 163.22
3.4%
Planned (10b5-1)
1 Apr 2026
Adsett Roger Chief Operating Officer
Sold on a plan 3×
$14.50M 88,060 at 164.63
45.2%
Planned (10b5-1)
30 Mar 2026
Smith Michael Alexander Chief Legal Officer
Sold on a plan
$2.96M 19,638 at 150.98
27.5%
Planned (10b5-1)
19 Mar 2026
Lewis William Chair and CEO
Sold on a plan 3×
$1.54M 10,699 at 143.52
3.4%
Planned (10b5-1)
5 Mar 2026
Lewis William Chair and CEO
Sold on a plan 4×
$1.56M 10,699 at 146.03
3.4%
Planned (10b5-1)
24 Feb 2026
Smith Michael Alexander Chief Legal Officer
Sold on a plan 3×
$3.86M 24,774 at 155.77
32.3%
Planned (10b5-1)
19 Feb 2026
Lewis William Chair and CEO
Sold on a plan 5×
$1.62M 10,699 at 150.97
3.4%
Planned (10b5-1)
9 Feb 2026
Lewis William Chair and CEO
Sold on a plan 3×
$1.98M 13,396 at 147.79
4.3%
Planned (10b5-1)
5 Feb 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan
$132.47K 869 at 152.44
1.0%
Planned (10b5-1)
3 Feb 2026
Lewis William Chair and CEO
Sold at will
$470.43K 3,009 at 156.34
1.0%
Not planned
3 Feb 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan
$123.84K 795 at 155.77
0.9%
Planned (10b5-1)
3 Feb 2026
Adsett Roger Chief Operating Officer
Sold at will
$123.53K 791 at 156.17
0.7%
Not planned
3 Feb 2026
Bonstein Sara Chief Financial Officer
Sold at will
$116.94K 748 at 156.34
0.9%
Not planned
3 Feb 2026
Smith Michael Alexander Chief Legal Officer
Sold at will
$100.01K 640 at 156.27
1.1%
Not planned
2 Feb 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan 5×
$1.23M 7,982 at 154.59
8.6%
Planned (10b5-1)
20 Jan 2026
Lewis William Chair and CEO
Sold on a plan 5×
$1.70M 10,699 at 158.93
3.4%
Planned (10b5-1)
12 Jan 2026
Lewis William Chair and CEO
Sold on a plan 7×
$3.25M 19,215 at 169.00
5.9%
Planned (10b5-1)
9 Jan 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan
$351.34K 1,887 at 186.19
2.2%
Planned (10b5-1)
8 Jan 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan 2×
$854.85K 4,911 at 174.07
5.4%
Planned (10b5-1)
8 Jan 2026
Lewis William Chair and CEO
Sold at will
$561.35K 3,223 at 174.17
1.0%
Not planned
8 Jan 2026
Adsett Roger Chief Operating Officer
Sold at will
$358.62K 2,059 at 174.17
1.9%
Not planned
8 Jan 2026
Bonstein Sara Chief Financial Officer
Sold at will
$252.02K 1,447 at 174.17
1.8%
Not planned
8 Jan 2026
Smith Michael Alexander Chief Legal Officer
Sold at will
$183.40K 1,053 at 174.17
1.8%
Not planned
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