InsiderClue
Stocks · Health care · Pharmaceutical Preparations

Amphastar Pharmaceuticals, Inc.

AMPH Clue Score63
United States Fiscal year ends December CIK 0001297184 Results filed 5 Nov 2026
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What the insiders did Net selling

Individual transactions

120
Insider
Date
Role
Action
Shares
Price
Amount
Rong Zhou
16 Sep 2026
Senior EVP, Production Center
Sold after exercise
10,000
$23.94
$239.40K
William J Peters
7 Aug 2026
CFO, EVP & Treasurer
Sold after exercise
8,180
$22.48
$183.89K
Rong Zhou
17 Dec 2025
Senior EVP, Production Center
Sold after exercise
9,787
$26.20
$256.38K
Richard K Prins
25 Nov 2025
Director
Sold after exercise
4,179
$27.10
$113.25K
Floyd F. Petersen
13 Nov 2025
Director
Sold after exercise
16,679
$26.49
$441.84K
William J Peters
4 Mar 2025
CFO, EVP & Treasurer
Sold after exercise
4,231
$27.54
$116.52K
Rong Zhou
13 Dec 2024
Senior EVP, Production Center
Sold after exercise
8,000
$45.23
$361.84K
Rong Zhou
12 Dec 2024
Senior EVP, Production Center
Sold after exercise
7,000
$44.43
$310.98K
Richard K Prins
9 Dec 2024
Director
Sold after exercise
10,000
$43.77
$437.70K
Richard K Prins
12 Nov 2024
Director
Sold after exercise
5,000
$48.80
$243.99K
Rong Zhou
12 Nov 2024
Senior EVP, Production Center
Sold after exercise
6,893
$48.88
$336.93K
William J Peters
6 Nov 2024
CFO, EVP & Treasurer
Sold after exercise
7,426
$52.05
$386.52K
Yakob Liawatidewi
6 Nov 2024
EVP Corp Admin Center
Sold after exercise
5,214
$52.05
$271.39K
Rong Zhou
13 Sep 2024
Senior EVP, Production Center
Sold after exercise
3,000
$48.26
$144.78K
Rong Zhou
26 Aug 2024
Senior EVP, Production Center
Sold after exercise
4,000
$48.35
$193.40K
Richard K Prins
12 Aug 2024
Director
Sold after exercise
17,101
$43.07
$736.55K
William J Peters
31 Jul 2024
CFO, EVP & Treasurer
Sold after exercise
10,282
$44.23
$454.77K
William J Peters
6 Mar 2024
CFO, EVP & Treasurer
Sold after exercise
51
$48.00
$2.45K
William J Peters
6 Mar 2024
CFO, EVP & Treasurer
Sold after exercise
4,681
$46.98
$219.90K
William J Peters
6 Mar 2024
CFO, EVP & Treasurer
Sold after exercise
13,404
$46.30
$620.54K
Rong Zhou
4 Dec 2023
Senior EVP, Production Center
Sold after exercise
3,514
$59.58
$209.36K
Rong Zhou
1 Dec 2023
Senior EVP, Production Center
Sold after exercise
4,316
$58.58
$252.83K
William J Peters
14 Nov 2023
CFO, EVP & Treasurer
Sold after exercise
14,868
$56.53
$840.55K
William J Peters
14 Nov 2023
CFO, EVP & Treasurer
Sold after exercise
30,162
$55.67
$1.68M
William J Peters
14 Nov 2023
CFO, EVP & Treasurer
Sold after exercise
14,220
$54.76
$778.72K
William J Peters
6 Sep 2023
CFO, EVP & Treasurer
Sold after exercise
59
$52.26
$3.08K
William J Peters
6 Sep 2023
CFO, EVP & Treasurer
Sold after exercise
60,684
$51.75
$3.14M
Yakob Liawatidewi
28 Aug 2023
EVP Corp Admin Center
Sold after exercise
28,816
$53.13
$1.53M
William J Peters
15 Jun 2023
CFO, EVP & Treasurer
Sold after exercise
13,000
$52.79
$686.27K
William J Peters
15 Jun 2023
CFO, EVP & Treasurer
Sold after exercise
12,000
$50.79
$609.48K
William J Peters
15 Jun 2023
CFO, EVP & Treasurer
Sold after exercise
11,868
$48.79
$579.04K
Rong Zhou
15 Jun 2023
EVP, Production Center
Sold after exercise
5,000
$51.79
$258.95K
Rong Zhou
13 Jun 2023
EVP, Production Center
Sold after exercise
5,000
$48.24
$241.20K
William J Peters
2 Jun 2023
CFO, EVP & Treasurer
Sold after exercise
11,000
$46.35
$509.86K
Howard Lee
1 Jun 2023
Director
Sold after exercise
16,679
$45.02
$750.96K
Rong Zhou
18 May 2023
EVP, Production Center
Sold after exercise
10,000
$44.21
$442.05K
William J Peters
18 May 2023
CFO, EVP & Treasurer
Sold after exercise
10,500
$44.35
$465.68K
Richard K Prins
15 May 2023
Director
Sold after exercise
5,000
$43.50
$217.50K
Richard K Prins
12 May 2023
Director
Sold after exercise
5,000
$42.06
$210.32K
William J Peters
17 Apr 2023
CFO, EVP & Treasurer
Sold after exercise
5,632
$42.35
$238.52K
William J Peters
13 Apr 2023
CFO, EVP & Treasurer
Sold after exercise
4,868
$42.35
$206.16K
Yakob Liawatidewi
13 Apr 2023
EVP Corp Admin Center
Sold after exercise
6,494
$42.00
$272.75K
Yakob Liawatidewi
13 Apr 2023
EVP Corp Admin Center
Sold after exercise
5,000
$41.00
$205.00K
William J Peters
10 Apr 2023
CFO, EVP & Treasurer
Sold after exercise
10,032
$40.35
$404.79K
Yakob Liawatidewi
10 Apr 2023
EVP Corp Admin Center
Sold after exercise
5,000
$40.00
$200.00K
William J Peters
15 Mar 2023
CFO, EVP & Treasurer
Sold after exercise
12,776
$36.43
$465.47K
William J Peters
1 Mar 2023
CFO, EVP & Treasurer
Sold after exercise
10,974
$36.33
$398.69K
Yakob Liawatidewi
9 Aug 2022
EVP Corp Admin Center
Sold after exercise
3,055
$39.00
$119.15K
William J Peters
9 Aug 2022
CFO, EVP & Treasurer
Sold after exercise
10,000
$38.35
$383.50K
Yakob Liawatidewi
8 Aug 2022
EVP Corp Admin Center
Sold after exercise
5,000
$38.00
$190.00K
Diane G. Gerst
18 Jul 2022
Director
Sold after exercise
1,520
$37.23
$56.60K
Yakob Liawatidewi
15 Jul 2022
EVP Corp Admin Center
Sold after exercise
7,359
$36.97
$272.09K
Yakob Liawatidewi
15 Jul 2022
EVP Corp Admin Center
Sold after exercise
3,478
$35.94
$125.00K
Diane G. Gerst
11 Jul 2022
Director
Sold after exercise
1,521
$36.26
$55.14K
Diane G. Gerst
5 Jul 2022
Director
Sold after exercise
1,813
$35.00
$63.46K
William J Peters
30 Jun 2022
CFO, EVP & Treasurer
Sold after exercise
18,386
$34.95
$642.59K
Diane G. Gerst
30 Jun 2022
Director
Sold after exercise
5,146
$35.00
$180.11K
Howard Lee
6 Jun 2022
Director
Sold after exercise
10,291
$37.79
$388.86K
Howard Lee
23 May 2022
Director
Sold after exercise
10,000
$34.93
$349.32K
Floyd F. Petersen
18 May 2022
Director
Sold after exercise
9,924
$35.05
$347.83K
Michael A Zasloff
16 May 2022
Director
Sold after exercise
10,291
$35.61
$366.50K
Michael A Zasloff
16 Mar 2022
Director
Sold after exercise
10,000
$33.71
$337.07K
William J Peters
16 Mar 2022
CFO, EVP & Treasurer
Sold after exercise
3,760
$34.36
$129.20K
William J Peters
16 Mar 2022
CFO, EVP & Treasurer
Sold after exercise
47,017
$33.93
$1.60M
Richard K Prins
15 Mar 2022
Director
Sold after exercise
10,000
$34.02
$340.21K
William J Peters
7 Mar 2022
CFO, EVP & Treasurer
Sold after exercise
13,026
$29.35
$382.31K
William J Peters
25 Feb 2022
CFO, EVP & Treasurer
Sold after exercise
12,000
$28.95
$347.40K
William J Peters
25 Feb 2022
CFO, EVP & Treasurer
Sold after exercise
11,000
$27.95
$307.45K
Rong Zhou
25 Feb 2022
EVP, Production Center
Sold after exercise
13,246
$28.77
$381.09K
William J Peters
8 Feb 2022
CFO, EVP & Treasurer
Sold after exercise
10,000
$26.95
$269.50K
Rong Zhou
8 Feb 2022
EVP, Production Center
Sold after exercise
7,000
$26.77
$187.39K
William J Peters
10 Jan 2022
CFO, EVP & Treasurer
Sold after exercise
16,000
$25.40
$406.40K
Rong Zhou
10 Jan 2022
EVP, Production Center
Sold after exercise
10,251
$25.77
$264.16K
Rong Zhou
10 Jan 2022
EVP, Production Center
Sold after exercise
10,677
$24.96
$266.53K
William J Peters
7 Jan 2022
CFO, EVP & Treasurer
Sold after exercise
11,776
$24.90
$293.22K
William J Peters
7 Jan 2022
CFO, EVP & Treasurer
Sold after exercise
20,000
$24.15
$483.00K
William J Peters
30 Dec 2021
CFO, EVP & Treasurer
Sold after exercise
10,000
$23.40
$234.00K
William J Peters
21 Dec 2021
CFO, EVP & Treasurer
Sold after exercise
8,256
$22.40
$184.93K
William J Peters
16 Dec 2021
CFO, EVP & Treasurer
Sold after exercise
1,744
$22.40
$39.07K
Richard K Prins
10 Dec 2021
Director
Sold after exercise
5,291
$21.36
$113.01K
Richard K Prins
22 Nov 2021
Director
Sold after exercise
5,000
$21.22
$106.10K
William J Peters
11 Nov 2021
CFO, EVP & Treasurer
Sold after exercise
10,000
$21.33
$213.30K
Rong Zhou
11 Nov 2021
EVP, Production Center
Sold after exercise
7,813
$21.67
$169.31K
Yakob Liawatidewi
2 Aug 2021
EVP Corp Admin Center
Sold after exercise
8,932
$21.14
$188.80K
Rong Zhou
2 Aug 2021
EVP, Production Center
Sold after exercise
9,123
$21.24
$193.73K
Rong Zhou
26 Jul 2021
EVP, Production Center
Sold after exercise
6,000
$20.87
$125.22K
Rong Zhou
20 Jul 2021
EVP, Production Center
Sold after exercise
5,187
$20.57
$106.70K
Yakob Liawatidewi
15 Jul 2021
EVP Corp Admin Center
Sold after exercise
31,524
$20.01
$630.69K
William J Peters
7 Jul 2021
CFO, EVP & Treasurer
Sold after exercise
10,000
$20.37
$203.74K
Howard Lee
8 Jun 2021
Director
Sold after exercise
8,000
$19.31
$154.51K
Rong Zhou
8 Jun 2021
EVP, Production Center
Sold after exercise
8,180
$19.34
$158.18K
Howard Lee
7 Jun 2021
Director
Sold after exercise
7,827
$19.28
$150.94K
Floyd F. Petersen
7 Jun 2021
Director
Sold after exercise
15,827
$19.34
$306.04K
Richard K Prins
7 Jun 2021
Director
Sold after exercise
5,000
$18.70
$93.50K
Richard K Prins
4 Jun 2021
Director
Sold after exercise
5,000
$18.77
$93.85K
Floyd F. Petersen
3 Jun 2021
Director
Sold after exercise
10,000
$18.65
$186.53K
Richard Koo
1 Jun 2021
Director
Sold after exercise
25,827
$19.28
$498.01K
Howard Lee
20 May 2021
Director
Sold after exercise
10,000
$19.74
$197.35K
Yakob Liawatidewi
17 May 2021
SVP Corp Admin Center
Sold after exercise
9,637
$19.99
$192.69K
Rong Zhou
14 May 2021
EVP, Production Center
Sold after exercise
17,419
$19.72
$343.46K
Michael A Zasloff
13 May 2021
Director
Sold after exercise
25,827
$19.34
$499.43K
Rong Zhou
13 May 2021
EVP, Production Center
Sold after exercise
700
$19.58
$13.71K
Yakob Liawatidewi
11 May 2021
EVP Corp Admin Center
Sold after exercise
10,000
$19.06
$190.60K
Richard K Prins
11 May 2021
Director
Sold after exercise
15,827
$18.90
$299.11K
Yakob Liawatidewi
21 Jul 2020
EVP Corp Admin Center
Sold after exercise
5,978
$21.22
$126.84K
Yakob Liawatidewi
20 Jul 2020
EVP Corp Admin Center
Sold after exercise
4,186
$21.03
$88.05K
William J Peters
6 Jul 2020
CFO, SVP & Treasurer
Sold after exercise
13,656
$22.00
$300.40K
Yakob Liawatidewi
9 Jun 2020
EVP Corp Admin Center
Sold after exercise
23,405
$20.41
$477.60K
Rong Zhou
4 Jun 2020
EVP, Production Center
Sold after exercise
9,806
$19.19
$188.18K
Rong Zhou
3 Jun 2020
EVP, Production Center
Sold after exercise
13,163
$18.82
$247.68K
Richard Koo
27 May 2020
Director
Sold after exercise
47,782
$18.18
$868.89K
Howard Lee
26 May 2020
Director
Sold after exercise
10,000
$18.60
$185.99K
Howard Lee
22 May 2020
Director
Sold after exercise
10,000
$18.36
$183.64K
Howard Lee
21 May 2020
Director
Sold after exercise
10,000
$18.47
$184.69K
Howard Lee
20 May 2020
Director
Sold after exercise
17,782
$18.43
$327.78K
Floyd F. Petersen
15 May 2020
Director
Sold after exercise
42,682
$18.25
$778.97K
Michael A Zasloff
15 May 2020
Director
Sold after exercise
22,950
$18.03
$413.68K
Floyd F. Petersen
14 May 2020
Director
Sold after exercise
5,000
$17.78
$88.88K
Michael A Zasloff
14 May 2020
Director
Sold after exercise
14,832
$18.00
$266.98K
Floyd F. Petersen
12 May 2020
Director
Sold after exercise
100
$19.20
$1.92K
Showing 250 of 408 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 482
Amendments (4/A) skipped 1
Filings about a different issuer 0
Unreadable filings 0
Joint filings 49
Sales on a Rule 10b5-1 plan 40
Sales straight out of an exercise 199
Sales at will 149
Transactions with no price 0
Shares from compensation/vesting 15,408,925
Sales filed before the plan box existed 131
History held since 19 Aug 2014