Insider trading

Period: 120 months Stock: AMPH + 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.

341 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.

341 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.

341 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.

341 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.
341 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
341 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.

341 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
12 May 2020
PRINS RICHARD K Director
Sold, plan not stated
$575.42K 30,282 at 19.00
43.5%
12 May 2020
Sold, plan not stated
$190.00K 10,000 at 19.00
22.1%
12 May 2020
Sold, plan not stated
$1.92K 100 at 19.20
0.1%
1 May 2020
Sold, plan not stated
$8.33K 500 at 16.66
0.7%
1 Apr 2020
Sold, plan not stated
$7.18K 500 at 14.36
0.7%
13 Mar 2020
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated 2×
$65.54K 4,701 at 13.94
6.0%
2 Mar 2020
Sold, plan not stated
$7.78K 500 at 15.56
0.7%
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%
3 Feb 2020
Sold, plan not stated
$9.56K 500 at 19.12
0.7%
21 Jan 2020
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$80.07K 3,990 at 20.07
4.8%
8 Jan 2020
Shandell Jason B. President and General Counsel
Sold, plan not stated
$460.98K 25,000 at 18.44
15.3%
2 Jan 2020
Sold, plan not stated
$19.14K 1,000 at 19.14
1.3%
18 Dec 2019
Shandell Jason B. President and General Counsel
Sold, plan not stated
$156.96K 8,205 at 19.13
5.6%
2 Dec 2019
Sold, plan not stated
$9.62K 500 at 19.25
0.7%
1 Nov 2019
Sold, plan not stated
$9.74K 500 at 19.48
0.7%
1 Oct 2019
Sold, plan not stated
$9.96K 500 at 19.92
0.7%
18 Sep 2019
Shandell Jason B. President and General Counsel
Sold, plan not stated
$156.51K 7,340 at 21.32
4.8%
16 Sep 2019
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$213.26K 9,800 at 21.76
10.6%
16 Sep 2019
Sold, plan not stated
$10.88K 500 at 21.75
0.7%
13 Sep 2019
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$64.34K 3,000 at 21.45
8.2%
11 Sep 2019
Zhang Jack Y. CEO & Chief Scientific Officer · indirect
Sold, plan not stated
$6.25M 300,000 at 20.82
4.1%
6 Sep 2019
Liawatidewi Yakob SVP Corp Admin Center · indirect
Sold, plan not stated
$52.45K 2,395 at 21.90
49.3%
5 Sep 2019
Liawatidewi Yakob SVP Corp Admin Center · indirect
Sold, plan not stated
$32.18K 1,515 at 21.24
23.8%
26 Aug 2019
PRINS RICHARD K Director
Sold, plan not stated
$81.77K 3,618 at 22.60
8.4%
23 Aug 2019
PRINS RICHARD K Director
Sold, plan not stated
$87.65K 3,882 at 22.58
9.0%
15 Aug 2019
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$103.78K 4,942 at 21.00
5.7%
13 Aug 2019
PRINS RICHARD K Director
Sold, plan not stated
$207.78K 10,000 at 20.78
20.3%
13 Aug 2019
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$103.65K 5,000 at 20.73
12.0%
12 Aug 2019
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$214.96K 10,518 at 20.44
22.3%
10 Jul 2019
Shandell Jason B. President and General Counsel
Sold, plan not stated
$134.33K 6,615 at 20.31
4.1%
6 May 2019
Zhou Rong EVP, Production Center
Sold, plan not stated
$218.50K 9,600 at 22.76
14.4%
1 May 2019
Shandell Jason B. President and General Counsel
Sold, plan not stated
$219.70K 10,000 at 21.97
5.9%
16 Apr 2019
Shandell Jason B. President and General Counsel
Sold, plan not stated
$195.88K 9,478 at 20.67
5.6%
15 Mar 2019
Shandell Jason B. President and General Counsel
Sold, plan not stated
$498.44K 24,508 at 20.34
13.2%
14 Mar 2019
Shandell Jason B. President and General Counsel
Sold, plan not stated
$159.49K 7,828 at 20.37
4.7%
4 Mar 2019
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$38.04K 1,500 at 25.36
1.9%
1 Mar 2019
Shandell Jason B. President and General Counsel
Sold, plan not stated
$187.43K 7,500 at 24.99
4.3%
1 Mar 2019
Zhou Rong EVP, Production Center
Sold, plan not stated
$80.00K 3,200 at 25.00
5.8%
15 Feb 2019
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$244.09K 10,016 at 24.37
11.7%
14 Feb 2019
Shandell Jason B. President and General Counsel
Sold, plan not stated
$180.38K 7,519 at 23.99
4.3%
14 Feb 2019
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$116.83K 4,868 at 24.00
11.9%
12 Feb 2019
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$94.80K 4,000 at 23.70
10.0%
5 Feb 2019
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$264.17K 11,397 at 23.18
24.1%
5 Feb 2019
Zhou Rong EVP, Production Center
Sold, plan not stated
$98.65K 4,289 at 23.00
7.6%
23 Jan 2019
Shandell Jason B. President and General Counsel
Sold, plan not stated 2×
$347.02K 15,497 at 22.39
8.4%
23 Jan 2019
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$90.60K 4,000 at 22.65
9.6%
22 Jan 2019
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$67.05K 3,000 at 22.35
7.4%
16 Jan 2019
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$70.33K 3,175 at 22.15
7.8%
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