Insider trading

Period: 12 months Stock: INSM Role: CEO × Minimum amount: $1M × + 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.

16 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.

16 decisions over 12 months Remove this filter
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.

16 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.

16 decisions over 12 months Remove this filter
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.
16 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
16 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.

16 decisions over 12 months
Stock
Insider
Type ?
Why it stands out
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)
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)
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)
13 May 2026
Lewis William Chair and CEO
Sold at will
$1.54M 13,283 at 116.18
4.4%
Not planned
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)
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)
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)
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)
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)
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)
Showing 1–16 of 16.