Insider trading

Period: 120 months Stock: AMPH Plan: Scheduled (10b5-1) × + 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.

38 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.

38 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.

38 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.

38 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.
38 decisions over 120 months Remove this filter
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
38 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.

38 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)
3 Nov 2025
Sold on a plan
$12.63K 500 at 25.27
0.7%
Planned (10b5-1)
1 Oct 2025
Sold on a plan
$13.60K 500 at 27.20
0.7%
Planned (10b5-1)
2 Sep 2025
Sold on a plan
$15.49K 500 at 30.98
0.6%
Planned (10b5-1)
1 Aug 2025
Sold on a plan
$10.42K 500 at 20.83
0.6%
Planned (10b5-1)
2 Jul 2025
Sold on a plan
$11.73K 500 at 23.47
0.6%
Planned (10b5-1)
2 Jun 2025
Sold on a plan
$12.84K 500 at 25.67
0.7%
Planned (10b5-1)
1 May 2025
Sold on a plan
$12.04K 500 at 24.08
0.7%
Planned (10b5-1)
1 Apr 2025
Sold on a plan
$14.19K 500 at 28.38
0.7%
Planned (10b5-1)
6 Mar 2025
Sold on a plan
$27.99K 1,000 at 27.99
1.3%
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)
6 Nov 2024
Liawatidewi Yakob EVP CORP ADMIN CENTER
Sold on a plan
$271.39K 5,214 at 52.05
6.5%
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)
3 Jun 2024
Sold on a plan
$21.33K 500 at 42.65
0.6%
Planned (10b5-1)
1 May 2024
Sold on a plan
$20.84K 500 at 41.67
0.6%
Planned (10b5-1)
1 Apr 2024
Sold on a plan
$21.71K 500 at 43.43
0.6%
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)
1 Mar 2024
Sold on a plan 2×
$22.85K 500 at 45.69
0.6%
Planned (10b5-1)
1 Feb 2024
Sold on a plan 2×
$26.55K 500 at 53.10
0.6%
Planned (10b5-1)
10 Jan 2024
Luo Mary Z. COO,Chief Scientist & Chairman
Sold on a plan 4×
$7.17M 131,386 at 54.59
10.6%
Planned (10b5-1)
9 Jan 2024
Luo Mary Z. COO,Chief Scientist & Chairman
Sold on a plan 3×
$4.92M 86,156 at 57.14
6.5%
Planned (10b5-1)
8 Jan 2024
Luo Mary Z. COO,Chief Scientist & Chairman
Sold on a plan 7×
$7.88M 133,644 at 58.93
9.2%
Planned (10b5-1)
2 Jan 2024
Sold on a plan 2×
$30.68K 500 at 61.37
0.6%
Planned (10b5-1)
1 Dec 2023
Sold on a plan 2×
$28.95K 500 at 57.90
0.6%
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)
1 Nov 2023
Sold on a plan
$22.65K 500 at 45.30
0.6%
Planned (10b5-1)
2 Oct 2023
Sold on a plan
$22.89K 500 at 45.78
0.6%
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
Liawatidewi Yakob EVP Corp Admin Center
Sold on a plan 2×
$477.75K 11,494 at 41.56
14.2%
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)
3 Apr 2023
Sold on a plan
$18.52K 491 at 37.72
0.6%
Planned (10b5-1)
Showing 1–38 of 38.