Insider trading

Period: 120 months Stock: AMPH Role: CFO × + 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.

54 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.

54 decisions over 120 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.

54 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.

54 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.
54 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
54 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.

54 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
21 Sep 2026
PETERS WILLIAM J CFO, EVP & TREASURER
Sold on a plan
$103.48K 4,139 at 25.00
2.4%
Planned (10b5-1)
7 Aug 2026
PETERS WILLIAM J CFO, EVP & TREASURER
Sold on a plan
$183.89K 8,180 at 22.48
4.5%
Planned (10b5-1)
4 Mar 2025
PETERS WILLIAM J CFO, EVP & TREASURER
Sold on a plan
$116.52K 4,231 at 27.54
4.2%
Planned (10b5-1)
6 Nov 2024
PETERS WILLIAM J CFO, EVP & TREASURER
Sold on a plan
$386.52K 7,426 at 52.05
7.3%
Planned (10b5-1)
31 Jul 2024
PETERS WILLIAM J CFO, EVP & TREASURER
Sold on a plan
$454.77K 10,282 at 44.23
9.9%
Planned (10b5-1)
27 Jun 2024
PETERS WILLIAM J CFO, EVP & TREASURER
Sold on a plan 2×
$147.17K 3,596 at 40.93
3.7%
Planned (10b5-1)
6 Mar 2024
PETERS WILLIAM J CFO, EVP & TREASURER
Sold on a plan 3×
$842.88K 18,136 at 46.48
14.0%
Planned (10b5-1)
14 Nov 2023
PETERS WILLIAM J CFO, EVP & Treasurer
Sold on a plan 3×
$3.30M 59,250 at 55.67
36.9%
Planned (10b5-1)
6 Sep 2023
PETERS WILLIAM J CFO, EVP & Treasurer
Sold on a plan 2×
$3.14M 60,743 at 51.75
37.5%
Planned (10b5-1)
15 Jun 2023
PETERS WILLIAM J CFO, EVP & Treasurer
Sold on a plan 3×
$1.87M 36,868 at 50.85
25.9%
Planned (10b5-1)
2 Jun 2023
PETERS WILLIAM J CFO, EVP & Treasurer
Sold on a plan
$509.86K 11,000 at 46.35
9.4%
Planned (10b5-1)
18 May 2023
PETERS WILLIAM J CFO, EVP & Treasurer
Sold on a plan
$465.68K 10,500 at 44.35
9.1%
Planned (10b5-1)
17 Apr 2023
PETERS WILLIAM J CFO, EVP & Treasurer
Sold on a plan
$238.52K 5,632 at 42.35
5.1%
Planned (10b5-1)
13 Apr 2023
PETERS WILLIAM J CFO, EVP & Treasurer
Sold on a plan
$206.16K 4,868 at 42.35
4.4%
Planned (10b5-1)
10 Apr 2023
PETERS WILLIAM J CFO, EVP & Treasurer
Sold at will
$404.79K 10,032 at 40.35
8.7%
Not planned
15 Mar 2023
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$465.47K 12,776 at 36.43
9.7%
1 Mar 2023
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$398.69K 10,974 at 36.33
9.8%
9 Aug 2022
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$383.50K 10,000 at 38.35
9.1%
30 Jun 2022
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$642.59K 18,386 at 34.95
15.5%
17 Jun 2022
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$176.68K 5,512 at 32.05
5.2%
16 Mar 2022
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated 2×
$1.72M 50,777 at 33.96
30.8%
15 Mar 2022
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$272.25K 7,900 at 34.46
7.4%
7 Mar 2022
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$382.31K 13,026 at 29.35
10.9%
25 Feb 2022
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated 2×
$654.85K 23,000 at 28.47
17.8%
8 Feb 2022
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$269.50K 10,000 at 26.95
8.6%
10 Jan 2022
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$406.40K 16,000 at 25.40
13.1%
7 Jan 2022
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated 2×
$776.22K 31,776 at 24.43
23.1%
30 Dec 2021
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$234.00K 10,000 at 23.40
8.6%
21 Dec 2021
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$184.93K 8,256 at 22.40
7.2%
16 Dec 2021
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$39.07K 1,744 at 22.40
1.6%
11 Nov 2021
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$213.30K 10,000 at 21.33
8.6%
16 Aug 2021
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$127.52K 6,589 at 19.35
5.9%
7 Jul 2021
PETERS WILLIAM J CFO, EVP & Treasurer
Sold, plan not stated
$203.74K 10,000 at 20.37
8.2%
15 Mar 2021
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$80.75K 4,244 at 19.03
4.7%
19 Jan 2021
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$121.24K 6,495 at 18.67
6.8%
14 Aug 2020
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$112.22K 5,512 at 20.36
5.4%
6 Jul 2020
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$300.40K 13,656 at 22.00
11.9%
13 Mar 2020
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated 2×
$65.54K 4,701 at 13.94
6.0%
21 Jan 2020
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$80.07K 3,990 at 20.07
4.8%
16 Sep 2019
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$213.26K 9,800 at 21.76
10.6%
15 Aug 2019
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$103.78K 4,942 at 21.00
5.7%
4 Mar 2019
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$38.04K 1,500 at 25.36
1.9%
15 Feb 2019
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$244.09K 10,016 at 24.37
11.7%
2 Jan 2019
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$63.35K 3,245 at 19.52
4.1%
3 Dec 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$224.00K 10,000 at 22.40
11.3%
12 Nov 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$65.37K 3,172 at 20.61
3.9%
9 Nov 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$214.72K 10,000 at 21.47
11.0%
8 Nov 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated 2×
$517.88K 25,312 at 20.46
23.7%
16 Aug 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$42.33K 2,407 at 17.59
2.7%
9 Jul 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$53.50K 3,250 at 16.46
3.5%
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