Insider trading

Period: 120 months Stock: INSM + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

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

373 decisions over 120 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.

373 decisions over 120 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.

373 decisions over 120 months
The trade

Minimum amount

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

373 decisions over 120 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.
373 decisions over 120 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
373 decisions over 120 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.

373 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
7 Jan 2026
Lewis William Chair and CEO
Sold at will
$412.64K 2,357 at 175.07
0.7%
Not planned
7 Jan 2026
Bonstein Sara Chief Financial Officer
Sold at will
$293.77K 1,678 at 175.07
2.0%
Not planned
7 Jan 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan
$252.15K 1,434 at 175.84
1.5%
Planned (10b5-1)
7 Jan 2026
Adsett Roger Chief Operating Officer
Sold at will
$140.41K 802 at 175.07
0.7%
Not planned
7 Jan 2026
Smith Michael Alexander Chief Legal Officer
Sold at will
$124.12K 709 at 175.07
1.2%
Not planned
6 Jan 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan 4×
$1.77M 10,185 at 173.80
9.9%
Planned (10b5-1)
6 Jan 2026
Lewis William Chair and CEO
Sold at will
$709.96K 4,096 at 173.33
1.3%
Not planned
6 Jan 2026
Bonstein Sara Chief Financial Officer
Sold at will
$262.94K 1,517 at 173.33
1.8%
Not planned
6 Jan 2026
Adsett Roger Chief Operating Officer
Sold at will
$247.69K 1,429 at 173.33
1.3%
Not planned
6 Jan 2026
Smith Michael Alexander Chief Legal Officer
Sold at will
$241.97K 1,396 at 173.33
2.3%
Not planned
5 Jan 2026
Flammer Martina M.D. Chief Medical Officer
Sold on a plan 7×
$2.11M 12,303 at 171.38
11.5%
Planned (10b5-1)
2 Jan 2026
Schaeffer Orlov S Nicole Chief People Strategy Officer
Sold on a plan 5×
$15.29M 87,290 at 175.20
67.6%
Sold half or more
18 Dec 2025
Lewis William Chair and CEO
Sold on a plan 10×
$1.79M 10,699 at 166.97
3.4%
Planned (10b5-1)
5 Dec 2025
Sold at will
$4.10M 20,000 at 205.01
7.6%
Not planned
4 Dec 2025
Lewis William Chair and CEO
Sold on a plan 4×
$2.20M 10,699 at 205.62
3.4%
Planned (10b5-1)
1 Dec 2025
Flammer Martina M.D. Chief Medical Officer
Sold on a plan 3×
$1.84M 8,895 at 206.98
9.7%
Planned (10b5-1)
24 Nov 2025
Sold at will
$1.02M 5,000 at 204.58
7.8%
Not planned
17 Nov 2025
LEE LEO Director
Sold at will 5×
$14.69M 75,000 at 195.90
57.8%
Sold half or more
14 Nov 2025
Sold at will
$1.96M 10,000 at 195.87
13.6%
Not planned
12 Nov 2025
Schaeffer Orlov S Nicole Chief People Strategy Officer
Sold at will 4×
$5.82M 30,000 at 194.00
45.1%
Not planned
11 Nov 2025
Flammer Martina M.D. Chief Medical Officer
Sold on a plan 4×
$5.92M 31,226 at 189.68
27.3%
Planned (10b5-1)
3 Nov 2025
Smith Michael Alexander Chief Legal Officer
Sold on a plan 8×
$4.99M 27,130 at 183.78
33.1%
Planned (10b5-1)
12 Sep 2025
Schaeffer Orlov S Nicole Chief People Strategy Officer
Sold on a plan 4×
$11.13M 76,520 at 145.45
67.7%
Sold half or more
12 Sep 2025
Sold at will
$1.45M 10,000 at 145.39
3.7%
Not planned
2 Sep 2025
Flammer Martina M.D. Chief Medical Officer
Sold on a plan 6×
$26.94M 186,648 at 144.34
69.2%
Sold half or more
2 Sep 2025
Smith Michael Alexander Chief Legal Officer
Sold on a plan 6×
$3.49M 24,272 at 143.89
30.7%
Planned (10b5-1)
20 Aug 2025
Sold at will
$1.30M 10,000 at 129.50
3.5%
Not planned
19 Aug 2025
Adsett Roger Chief Operating Officer
Sold at will 2×
$3.19M 25,000 at 127.58
19.1%
Not planned
18 Aug 2025
Lewis William Chair and CEO · indirect
Sold on a plan 3×
$881.47K 6,865 at 128.40
2.9%
Planned (10b5-1)
14 Aug 2025
Schaeffer Orlov S Nicole Chief People Strategy Officer
Sold at will 3×
$1.27M 10,000 at 127.34
11.1%
Not planned
12 Aug 2025
Sold at will
$1.22M 10,000 at 121.58
3.3%
Not planned
4 Aug 2025
Flammer Martina M.D. Chief Medical Officer
Sold on a plan
$954.29K 8,715 at 109.50
9.5%
Planned (10b5-1)
4 Aug 2025
Lewis William Chair and CEO · indirect
Sold on a plan 3×
$750.01K 6,830 at 109.81
2.8%
Planned (10b5-1)
21 Jul 2025
Bonstein Sara Chief Financial Officer
Sold on a plan 2×
$6.00M 58,400 at 102.67
44.3%
Planned (10b5-1)
15 Jul 2025
Lewis William Chair and CEO · indirect
Sold on a plan 3×
$699.22K 6,830 at 102.37
2.8%
Planned (10b5-1)
15 Jul 2025
Smith Michael Alexander Chief Legal Officer
Sold on a plan
$95.64K 933 at 102.51
1.4%
Planned (10b5-1)
11 Jul 2025
Smith Michael Alexander Chief Legal Officer
Sold on a plan
$72.11K 748 at 96.41
1.1%
Planned (10b5-1)
7 Jul 2025
Bonstein Sara Chief Financial Officer
Sold on a plan 2×
$5.54M 57,764 at 95.86
40.7%
Planned (10b5-1)
1 Jul 2025
Lewis William Chair and CEO · indirect
Sold on a plan 3×
$671.61K 6,830 at 98.33
2.8%
Planned (10b5-1)
23 Jun 2025
Bonstein Sara Chief Financial Officer
Sold on a plan 2×
$5.88M 57,765 at 101.78
38.2%
Planned (10b5-1)
16 Jun 2025
Lewis William Chair and CEO · indirect
Sold on a plan 4×
$13.03M 129,805 at 100.39
35.7%
Planned (10b5-1)
16 Jun 2025
Adsett Roger Chief Operating Officer
Sold on a plan 2×
$1.06M 10,686 at 98.82
7.6%
Planned (10b5-1)
16 Jun 2025
Lewis William Chair and CEO
Sold on a plan 4×
$522.06K 5,204 at 100.32
1.7%
Planned (10b5-1)
11 Jun 2025
Schaeffer Orlov S Nicole Chief People Strategy Officer
Sold on a plan 5×
$9.26M 99,172 at 93.42
52.6%
Sold half or more
11 Jun 2025
Flammer Martina M.D. Chief Medical Officer
Sold on a plan
$1.84M 19,423 at 94.50
18.9%
Planned (10b5-1)
10 Jun 2025
Bonstein Sara Chief Financial Officer
Sold on a plan 6×
$5.15M 57,766 at 89.12
35.8%
Planned (10b5-1)
10 Jun 2025
Schaeffer Orlov S Nicole Chief People Strategy Officer
Sold on a plan
$3.39M 38,300 at 88.64
24.4%
Planned (10b5-1)
10 Jun 2025
Flammer Martina M.D. Chief Medical Officer
Sold on a plan
$2.28M 25,740 at 88.64
23.6%
Planned (10b5-1)
5 Jun 2025
Smith Michael Alexander Chief Legal Officer
Sold on a plan
$138.11K 1,879 at 73.50
2.7%
Planned (10b5-1)
4 Jun 2025
MCGIRR DAVID W J Director
Sold on a plan
$219.81K 3,000 at 73.27
3.0%
Planned (10b5-1)
Showing 51–100 of 373. ← Newer Page 2 of 8 Older →