Insider trading

Period: 120 months Stock: AMST Minimum amount: $100K × + 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.

13 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.

13 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.

13 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.

13 decisions over 120 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.
13 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
13 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.

13 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
28 Apr 2026
Parmer George Director
Bought
$350.00K 243,902 at 1.44
75.5%
Largest buy in 3 yrs
28 Apr 2026
Sastry Ann Marie CHIEF EXECUTIVE OFFICER
Bought
$250.00K 174,216 at 1.44
19.9%
7 Jan 2025
Sastry Ann Marie CHIEF EXECUTIVE OFFICER · indirect
Bought
$1,000.00K 333,333 at 3.00
61.5%
Largest buy in 3 yrs
7 Jan 2025
Parmer George Director
Bought
$250.00K 83,333 at 3.00
78.7%
First buy in 3+ yrs
20 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$124.73K 56,437 at 2.21
2.5%
13 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$123.41K 53,610 at 2.30
2.3%
4 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$154.04K 51,971 at 2.96
2.1%
8 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$155.46K 43,450 at 3.58
1.6%
6 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$284.52K 67,904 at 4.19
2.4%
1 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$121.30K 29,427 at 4.12
1.0%
30 Mar 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$195.25K 45,834 at 4.26
1.6%
29 Sep 2020
Tompkins Mark N. 10% owner
Bought
$100.00K 20,000 at 5.00
0.7%
First buy on file
29 Sep 2020
OMENN GILBERT S Director · indirect
Bought
$100.00K 20,000 at 5.00
48.0%
First buy on file
Showing 1–13 of 13.