Insider trading

Period: 120 months Stock: AMPH Role: Other officers × + 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.

109 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.

109 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.

109 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.

109 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.
109 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
109 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.

109 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
16 Sep 2026
Zhou Rong SENIOR EVP, PRODUCTION CENTER
Sold at will
$239.40K 10,000 at 23.94
5.6%
Not planned
2 Sep 2026
Zhou Rong SENIOR EVP, PRODUCTION CENTER
Sold at will
$75.31K 3,187 at 23.63
1.8%
Not planned
17 Dec 2025
Zhou Rong SENIOR EVP, PRODUCTION CENTER
Sold at will
$256.38K 9,787 at 26.20
6.6%
Not planned
13 Dec 2024
Zhou Rong SENIOR EVP, PRODUCTION CENTER
Sold at will
$361.84K 8,000 at 45.23
6.3%
Not planned
12 Dec 2024
Zhou Rong SENIOR EVP, PRODUCTION CENTER
Sold at will
$310.98K 7,000 at 44.43
5.6%
Not planned
12 Nov 2024
Zhou Rong SENIOR EVP, PRODUCTION CENTER
Sold at will
$336.93K 6,893 at 48.88
5.5%
Not planned
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)
13 Sep 2024
Zhou Rong SENIOR EVP, PRODUCTION CENTER
Sold at will
$144.78K 3,000 at 48.26
2.5%
Not planned
26 Aug 2024
Zhou Rong SENIOR EVP, PRODUCTION CENTER
Sold at will
$193.40K 4,000 at 48.35
3.3%
Not planned
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)
4 Dec 2023
Zhou Rong Senior EVP, Production Center
Sold at will
$209.36K 3,514 at 59.58
3.0%
Not planned
1 Dec 2023
Zhou Rong Senior EVP, Production Center
Sold at will
$252.83K 4,316 at 58.58
3.7%
Not planned
28 Aug 2023
Liawatidewi Yakob EVP Corp Admin Center
Sold at will
$1.53M 28,816 at 53.13
29.3%
Not planned
15 Jun 2023
Zhou Rong EVP, Production Center
Sold at will
$258.95K 5,000 at 51.79
4.9%
Not planned
13 Jun 2023
Zhou Rong EVP, Production Center
Sold at will
$241.20K 5,000 at 48.24
5.4%
Not planned
18 May 2023
Zhou Rong EVP, Production Center
Sold at will
$442.05K 10,000 at 44.21
10.2%
Not planned
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)
10 Apr 2023
Liawatidewi Yakob EVP Corp Admin Center
Sold at will
$200.00K 5,000 at 40.00
6.7%
Not planned
9 Aug 2022
Liawatidewi Yakob EVP Corp Admin Center
Sold, plan not stated
$119.15K 3,055 at 39.00
4.7%
8 Aug 2022
Liawatidewi Yakob EVP Corp Admin Center
Sold, plan not stated
$190.00K 5,000 at 38.00
7.5%
15 Jul 2022
Liawatidewi Yakob EVP Corp Admin Center
Sold, plan not stated 2×
$397.08K 10,837 at 36.64
15.0%
25 Feb 2022
Zhou Rong EVP, Production Center
Sold, plan not stated
$381.09K 13,246 at 28.77
15.9%
8 Feb 2022
Zhou Rong EVP, Production Center
Sold, plan not stated
$187.39K 7,000 at 26.77
8.4%
10 Jan 2022
Zhou Rong EVP, Production Center
Sold, plan not stated 2×
$530.68K 20,928 at 25.36
21.5%
11 Nov 2021
Zhou Rong EVP, Production Center
Sold, plan not stated
$169.31K 7,813 at 21.67
8.6%
2 Aug 2021
Zhou Rong EVP, Production Center
Sold, plan not stated
$193.73K 9,123 at 21.24
9.9%
2 Aug 2021
Liawatidewi Yakob EVP Corp Admin Center
Sold, plan not stated
$188.80K 8,932 at 21.14
14.2%
26 Jul 2021
Zhou Rong EVP, Production Center
Sold, plan not stated
$125.22K 6,000 at 20.87
6.5%
20 Jul 2021
Zhou Rong EVP, Production Center
Sold, plan not stated
$106.70K 5,187 at 20.57
5.7%
15 Jul 2021
Liawatidewi Yakob EVP Corp Admin Center
Sold, plan not stated
$630.69K 31,524 at 20.01
36.8%
9 Jun 2021
Zhou Rong EVP, Production Center
Sold, plan not stated
$92.65K 4,732 at 19.58
5.2%
8 Jun 2021
Zhou Rong EVP, Production Center
Sold, plan not stated
$158.18K 8,180 at 19.34
8.2%
17 May 2021
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$192.69K 9,637 at 19.99
15.2%
14 May 2021
Zhou Rong EVP, Production Center
Sold, plan not stated
$343.46K 17,419 at 19.72
16.2%
14 May 2021
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$63.45K 3,186 at 19.92
5.6%
13 May 2021
Zhou Rong EVP, Production Center
Sold, plan not stated
$13.71K 700 at 19.58
0.7%
12 May 2021
Liawatidewi Yakob EVP Corp Admin Center
Sold, plan not stated
$88.74K 4,592 at 19.33
7.5%
11 May 2021
Liawatidewi Yakob EVP Corp Admin Center
Sold, plan not stated
$190.60K 10,000 at 19.06
14.0%
21 Jul 2020
Liawatidewi Yakob EVP Corp Admin Center
Sold, plan not stated
$126.84K 5,978 at 21.22
11.5%
20 Jul 2020
Liawatidewi Yakob EVP Corp Admin Center
Sold, plan not stated
$88.05K 4,186 at 21.03
8.3%
9 Jun 2020
Liawatidewi Yakob EVP Corp Admin Center
Sold, plan not stated
$477.60K 23,405 at 20.41
33.7%
4 Jun 2020
Zhou Rong EVP, Production Center
Sold, plan not stated
$188.18K 9,806 at 19.19
11.0%
3 Jun 2020
Zhou Rong EVP, Production Center
Sold, plan not stated
$247.68K 13,163 at 18.82
14.1%
7 Feb 2020
Shandell Jason B. President and General Counsel
Sold, plan not stated
$136.26K 6,853 at 19.88
4.7%
6 Feb 2020
Shandell Jason B. President and General Counsel
Sold, plan not stated
$434.95K 21,933 at 19.83
13.6%
5 Feb 2020
Shandell Jason B. President and General Counsel
Sold, plan not stated
$305.55K 15,615 at 19.57
10.1%
8 Jan 2020
Shandell Jason B. President and General Counsel
Sold, plan not stated
$460.98K 25,000 at 18.44
15.3%
18 Dec 2019
Shandell Jason B. President and General Counsel
Sold, plan not stated
$156.96K 8,205 at 19.13
5.6%
Showing 1–50 of 109. Page 1 of 3 Older →