Insider trading

Period: 120 months Stock: AMST + 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.

63 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.

63 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.

63 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.

63 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.
63 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
63 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.

63 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
7 Jan 2025
OMENN GILBERT S Director · indirect
Bought
$10.00K 3,333 at 3.00
51.5%
First buy in 3+ yrs
20 Dec 2023
Sastry Ann Marie CHIEF EXECUTIVE OFFICER · indirect
Bought
$18.50K 10,000 at 1.85
1.9%
8 Mar 2023
Sastry Ann Marie CHIEF EXECUTIVE OFFICER · indirect
Bought
$3.16K 1,019 at 3.10
0.2%
3 Mar 2023
Sastry Ann Marie CHIEF EXECUTIVE OFFICER · indirect
Bought
$6.00K 2,000 at 3.00
0.4%
1 Mar 2023
Sastry Ann Marie CHIEF EXECUTIVE OFFICER · indirect
Bought
$6.00K 2,000 at 3.00
0.4%
24 Feb 2023
Sastry Ann Marie CHIEF EXECUTIVE OFFICER · indirect
Bought
$4.84K 2,000 at 2.42
0.4%
1 Dec 2022
Sastry Ann Marie CHIEF EXECUTIVE OFFICER · indirect
Bought
$6.52K 20,000 at 0.33
0.3%
28 Nov 2022
Sastry Ann Marie CHIEF EXECUTIVE OFFICER · indirect
Bought
$4.56K 20,000 at 0.23
0.3%
28 Dec 2021
Sastry Ann Marie CHIEF EXECUTIVE OFFICER · indirect
Bought
$4.95K 5,000 at 0.99
0.1%
14 Dec 2021
OMENN GILBERT S Director · indirect
Bought
$9.35K 8,000 at 1.17
11.5%
13 Dec 2021
OMENN GILBERT S Director · indirect
Bought
$9.47K 8,000 at 1.18
13.0%
First buy on file
3 Dec 2021
Bought
$10.83K 10,000 at 1.08
19.2%
First buy on file
2 Dec 2021
Ogawa Richard Director
Bought
$21.90K 20,000 at 1.10
28.3%
First buy on file
19 Nov 2021
Sastry Ann Marie CHIEF EXECUTIVE OFFICER · indirect
Bought
$50.02K 38,271 at 1.31
0.6%
19 Nov 2021
Parmer George Director
Bought
$13.05K 10,000 at 1.31
0.8%
First buy on file
11 Jun 2021
Sastry Ann Marie CHIEF EXECUTIVE OFFICER · indirect
Bought
$55.95K 15,000 at 3.73
0.2%
First buy on file
1 Jun 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$89.48K 35,822 at 2.50
1.7%
28 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$41.74K 17,494 at 2.39
0.8%
27 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$32.44K 13,600 at 2.39
0.6%
26 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$51.04K 22,444 at 2.27
1.1%
25 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$25.62K 11,453 at 2.24
0.5%
24 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$23.04K 10,243 at 2.25
0.5%
21 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$7.02K 3,191 at 2.20
0.1%
20 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$124.73K 56,437 at 2.21
2.5%
19 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$98.97K 44,400 at 2.23
2.0%
18 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$36.00K 16,430 at 2.19
0.7%
17 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$16.43K 7,395 at 2.22
76.5%
Sold half or more
14 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$94.46K 40,109 at 2.36
1.7%
13 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$123.41K 53,610 at 2.30
2.3%
12 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$30.38K 13,705 at 2.22
0.6%
11 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$26.09K 11,311 at 2.31
0.5%
10 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$31.53K 12,600 at 2.50
0.5%
7 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$34.22K 12,711 at 2.69
0.5%
6 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$36.72K 13,777 at 2.67
0.6%
5 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$27.06K 10,385 at 2.61
0.4%
4 May 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$154.04K 51,971 at 2.96
2.1%
28 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$9.74K 3,400 at 2.86
0.1%
27 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$34.02K 11,519 at 2.95
0.4%
26 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$40.08K 13,500 at 2.97
0.5%
16 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$29.66K 10,627 at 2.79
0.4%
15 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$80.85K 25,000 at 3.23
1.0%
14 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$39.17K 12,050 at 3.25
0.5%
13 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$86.37K 26,494 at 3.26
1.0%
12 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$53.31K 15,539 at 3.43
0.6%
9 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$38.72K 11,000 at 3.52
0.4%
8 Apr 2021
Tompkins Mark N. 10% owner
Sold, plan not stated
$155.46K 43,450 at 3.58
1.6%
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