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
14 Jan 2019
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$177.20 8 at 22.15
0.0%
2 Jan 2019
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$63.35K 3,245 at 19.52
4.1%
14 Dec 2018
Zhang Jack Y. CEO & Chief Scientific Officer
Sold, plan not stated
$892.31K 43,577 at 20.48
2.1%
14 Dec 2018
PRINS RICHARD K Director
Sold, plan not stated
$33.37K 1,616 at 20.65
4.6%
13 Dec 2018
Zhang Jack Y. CEO & Chief Scientific Officer · indirect
Sold, plan not stated
$623.17K 29,689 at 20.99
0.4%
13 Dec 2018
Sold, plan not stated
$623.17K 29,689 at 20.99
0.4%
12 Dec 2018
Zhang Jack Y. CEO & Chief Scientific Officer · indirect
Sold, plan not stated
$794.74K 37,469 at 21.21
0.5%
12 Dec 2018
Sold, plan not stated
$794.74K 37,469 at 21.21
0.5%
11 Dec 2018
Zhang Jack Y. CEO & Chief Scientific Officer · indirect
Sold, plan not stated 2×
$1.43M 66,757 at 21.47
0.9%
11 Dec 2018
Sold, plan not stated 2×
$1.43M 66,757 at 21.47
0.9%
11 Dec 2018
Koo Richard Director
Sold, plan not stated
$624.08K 29,278 at 21.32
10.8%
10 Dec 2018
Sold, plan not stated
$1.27M 58,557 at 21.72
65.6%
Sold half or more
7 Dec 2018
Lee Howard Director
Sold, plan not stated
$203.06K 9,278 at 21.89
7.0%
6 Dec 2018
Lee Howard Director
Sold, plan not stated 2×
$212.24K 10,000 at 21.22
7.5%
4 Dec 2018
Lee Howard Director
Sold, plan not stated 2×
$219.16K 10,000 at 21.92
7.5%
3 Dec 2018
Shandell Jason B. President and General Counsel
Sold, plan not stated
$373.18K 16,630 at 22.44
8.3%
3 Dec 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$224.00K 10,000 at 22.40
11.3%
3 Dec 2018
Zhou Rong EVP, Production Center
Sold, plan not stated
$23.96K 1,089 at 22.00
2.0%
30 Nov 2018
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$247.24K 11,500 at 21.50
23.5%
30 Nov 2018
Liawatidewi Yakob SVP Corp Admin Center · indirect
Sold, plan not stated
$53.27K 2,480 at 21.48
28.0%
29 Nov 2018
PRINS RICHARD K Director
Sold, plan not stated
$102.50K 5,000 at 20.50
12.4%
28 Nov 2018
Liawatidewi Yakob SVP Corp Admin Center · indirect
Sold, plan not stated
$31.14K 1,520 at 20.49
14.7%
23 Nov 2018
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$26.31K 1,299 at 20.26
3.4%
14 Nov 2018
Sold, plan not stated
$596.95K 29,278 at 20.39
49.5%
14 Nov 2018
Shandell Jason B. President and General Counsel
Sold, plan not stated 2×
$326.85K 16,015 at 20.41
8.0%
14 Nov 2018
PRINS RICHARD K Director
Sold, plan not stated
$101.17K 5,000 at 20.23
12.4%
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
Shandell Jason B. President and General Counsel
Sold, plan not stated
$337.83K 16,095 at 20.99
7.5%
9 Nov 2018
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$250.42K 11,808 at 21.21
23.3%
9 Nov 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$214.72K 10,000 at 21.47
11.0%
9 Nov 2018
Zhou Rong EVP, Production Center
Sold, plan not stated
$22.87K 1,089 at 21.00
2.0%
8 Nov 2018
Shandell Jason B. President and General Counsel
Sold, plan not stated
$748.59K 36,201 at 20.68
15.4%
8 Nov 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated 2×
$517.88K 25,312 at 20.46
23.7%
8 Nov 2018
Liawatidewi Yakob SVP Corp Admin Center
Sold, plan not stated
$123.00K 6,000 at 20.50
12.8%
8 Nov 2018
Zhou Rong EVP, Production Center
Sold, plan not stated
$21.68K 1,084 at 20.00
2.0%
16 Aug 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$42.33K 2,407 at 17.59
2.7%
14 Aug 2018
PRINS RICHARD K Director
Sold, plan not stated
$178.18K 10,000 at 17.82
22.0%
11 Jul 2018
Shandell Jason B. President and General Counsel
Sold, plan not stated
$241.42K 14,399 at 16.77
6.7%
9 Jul 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$53.50K 3,250 at 16.46
3.5%
12 Jun 2018
Sold, plan not stated
$247.84K 15,000 at 16.52
33.4%
16 May 2018
Zhang Jack Y. CEO & Chief Scientific Officer
Bought
$240.85K 15,000 at 16.06
0.7%
First buy on file
15 May 2018
Zhang Jack Y. CEO & Chief Scientific Officer
Bought
$401.97K 25,000 at 16.08
1.2%
First buy on file
20 Mar 2018
Shandell Jason B. President and General Counsel
Sold, plan not stated
$161.87K 8,293 at 19.52
3.6%
19 Mar 2018
Shandell Jason B. President and General Counsel
Sold, plan not stated
$226.77K 11,707 at 19.37
4.8%
15 Mar 2018
PRINS RICHARD K Director
Sold, plan not stated
$330.32K 16,598 at 19.90
36.5%
14 Mar 2018
Shandell Jason B. President and General Counsel
Sold, plan not stated
$8.18K 400 at 20.45
0.2%
13 Mar 2018
PETERS WILLIAM J CFO, SVP & Treasurer
Sold, plan not stated
$398.00K 19,801 at 20.10
20.2%
13 Mar 2018
Shandell Jason B. President and General Counsel
Sold, plan not stated
$6.14K 300 at 20.45
0.1%
26 Jan 2018
Shandell Jason B. President and General Counsel
Sold, plan not stated
$194.92K 9,966 at 19.56
4.4%
25 Jan 2018
Shandell Jason B. President and General Counsel
Sold, plan not stated
$166.82K 8,661 at 19.26
3.7%
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