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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

81
Insider
Date
Role
Action
Shares
Price
Amount
Rong Zhou
2 Sep 2026
Senior EVP, Production Center
Sell
3,187
$23.63
$75.31K
Richard K Prins
11 Aug 2026
Director
Sell
7,973
$20.30
$161.85K
Floyd F. Petersen
12 Dec 2025
Director
Sell
2,426
$25.92
$62.89K
Floyd F. Petersen
11 Dec 2025
Director
Sell
1,737
$25.69
$44.62K
Floyd F. Petersen
5 Sep 2024
Director
Sell
3,000
$46.47
$139.42K
Floyd F. Petersen
10 Jun 2024
Director
Sell
3,000
$41.40
$124.20K
Michael A Zasloff
5 Mar 2024
Director
Sell
3,111
$47.53
$147.85K
Michael A Zasloff
5 Mar 2024
Director
Sell
9,389
$47.06
$441.87K
Richard K Prins
17 Nov 2023
Director
Sell
4,000
$55.86
$223.45K
Gayle Deflin
14 Nov 2023
Director
Sell
4,163
$55.45
$230.84K
Richard K Prins
13 Nov 2023
Director
Sell
5,000
$52.50
$262.50K
Richard K Prins
18 Aug 2023
Director
Sell
2,000
$52.50
$105.01K
Richard K Prins
15 Aug 2023
Director
Sell
4,163
$57.39
$238.91K
Michael A Zasloff
15 Aug 2023
Director
Sell
12,759
$57.22
$730.03K
Gayle Deflin
18 May 2023
Director
Sell
4,519
$44.01
$198.89K
Floyd F. Petersen
17 May 2023
Director
Sell
5,000
$43.13
$215.66K
Michael A Zasloff
15 May 2023
Director
Sell
7,500
$42.18
$316.34K
Gayle Deflin
15 May 2023
Director
Sell
1,500
$43.15
$64.73K
Floyd F. Petersen
1 Mar 2023
Director
Sell
87
$37.25
$3.24K
Floyd F. Petersen
1 Mar 2023
Director
Sell
412
$36.59
$15.07K
Floyd F. Petersen
1 Mar 2023
Director
Sell
1
$33.70
$33.70
Floyd F. Petersen
1 Feb 2023
Director
Sell
500
$30.35
$15.18K
Floyd F. Petersen
3 Jan 2023
Director
Sell
500
$27.94
$13.97K
Floyd F. Petersen
1 Dec 2022
Director
Sell
500
$30.13
$15.07K
Floyd F. Petersen
1 Nov 2022
Director
Sell
500
$31.13
$15.57K
Floyd F. Petersen
3 Oct 2022
Director
Sell
500
$28.59
$14.30K
Floyd F. Petersen
1 Sep 2022
Director
Sell
500
$29.44
$14.72K
Floyd F. Petersen
1 Aug 2022
Director
Sell
500
$37.48
$18.74K
Floyd F. Petersen
1 Jul 2022
Director
Sell
500
$34.78
$17.39K
William J Peters
17 Jun 2022
CFO, EVP & Treasurer
Sell
5,512
$32.05
$176.68K
Floyd F. Petersen
1 Jun 2022
Director
Sell
120
$37.67
$4.52K
Floyd F. Petersen
1 Jun 2022
Director
Sell
380
$36.79
$13.98K
Jack Y. Zhang
20 May 2022
CEO & Chief Scientific Officer
Sell
10,650
$34.21
$364.37K
Jack Y. Zhang
19 May 2022
CEO & Chief Scientific Officer
Sell
115
$34.28
$3.94K
Jack Y. Zhang
19 May 2022
CEO & Chief Scientific Officer
Sell
41,615
$33.76
$1.40M
Jack Y. Zhang
18 May 2022
CEO & Chief Scientific Officer
Sell
2,006
$35.78
$71.78K
Jack Y. Zhang
18 May 2022
CEO & Chief Scientific Officer
Sell
9,776
$34.77
$339.93K
Jack Y. Zhang
18 May 2022
CEO & Chief Scientific Officer
Sell
55,264
$33.97
$1.88M
Jack Y. Zhang
17 May 2022
CEO & Chief Scientific Officer
Sell
2,837
$36.14
$102.53K
Jack Y. Zhang
17 May 2022
CEO & Chief Scientific Officer
Sell
47,539
$35.74
$1.70M
Jack Y. Zhang
16 May 2022
CEO & Chief Scientific Officer
Sell
13,795
$36.41
$502.27K
Jack Y. Zhang
16 May 2022
CEO & Chief Scientific Officer
Sell
54,274
$35.58
$1.93M
Floyd F. Petersen
2 May 2022
Director
Sell
27
$35.52
$958.91
Floyd F. Petersen
2 May 2022
Director
Sell
268
$35.15
$9.42K
Floyd F. Petersen
1 Apr 2022
Director
Sell
63
$37.35
$2.35K
Floyd F. Petersen
1 Apr 2022
Director
Sell
437
$36.59
$15.99K
William J Peters
15 Mar 2022
CFO, EVP & Treasurer
Sell
7,900
$34.46
$272.25K
Floyd F. Petersen
1 Mar 2022
Director
Sell
500
$27.27
$13.64K
Floyd F. Petersen
1 Feb 2022
Director
Sell
411
$24.24
$9.96K
Floyd F. Petersen
1 Feb 2022
Director
Sell
89
$23.37
$2.08K
Floyd F. Petersen
3 Jan 2022
Director
Sell
500
$23.22
$11.61K
Floyd F. Petersen
22 Dec 2021
Director
Sell
1,000
$22.50
$22.50K
William J Peters
16 Aug 2021
CFO, EVP & Treasurer
Sell
6,589
$19.35
$127.52K
Rong Zhou
9 Jun 2021
EVP, Production Center
Sell
4,732
$19.58
$92.65K
Yakob Liawatidewi
14 May 2021
SVP Corp Admin Center
Sell
3,186
$19.92
$63.45K
Yakob Liawatidewi
12 May 2021
EVP Corp Admin Center
Sell
4,592
$19.33
$88.74K
William J Peters
15 Mar 2021
CFO, SVP & Treasurer
Sell
4,244
$19.03
$80.75K
Jack Y. Zhang
18 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
407
$18.58
$7.56K
Jack Y. Zhang
17 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
13,801
$18.67
$257.72K
Jack Y. Zhang
16 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
16,259
$18.51
$301.03K
Jack Y. Zhang
12 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
13,277
$18.94
$251.52K
Jack Y. Zhang
11 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
19,823
$19.06
$377.88K
Jack Y. Zhang
10 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
15,747
$18.76
$295.34K
Jack Y. Zhang
9 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
11,927
$18.93
$225.78K
Jack Y. Zhang
8 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
13,452
$18.89
$254.05K
Jack Y. Zhang
5 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
15,507
$18.94
$293.72K
Jack Y. Zhang
4 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
25,570
$18.89
$483.02K
Jack Y. Zhang
3 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
16,299
$18.36
$299.32K
Jack Y. Zhang
2 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
13,817
$18.66
$257.82K
Floyd F. Petersen
1 Feb 2021
Director
Sell
639
$18.26
$11.67K
Jack Y. Zhang
1 Feb 2021
CEO & Chief Scientific Officer
Sell indirect
24,114
$18.29
$441.12K
William J Peters
19 Jan 2021
CFO, SVP & Treasurer
Sell
6,495
$18.67
$121.24K
Floyd F. Petersen
1 Dec 2020
Director
Sell
500
$17.87
$8.94K
Floyd F. Petersen
2 Nov 2020
Director
Sell
500
$19.84
$9.92K
Floyd F. Petersen
1 Oct 2020
Director
Sell
500
$18.89
$9.45K
Floyd F. Petersen
1 Sep 2020
Director
Sell
500
$19.90
$9.95K
William J Peters
14 Aug 2020
CFO, SVP & Treasurer
Sell
5,512
$20.36
$112.22K
Richard K Prins
11 Aug 2020
Director
Sell
6,000
$20.33
$121.98K
Floyd F. Petersen
3 Aug 2020
Director
Sell
500
$20.62
$10.31K
Floyd F. Petersen
1 Jul 2020
Director
Sell
500
$22.27
$11.14K
Floyd F. Petersen
1 Jun 2020
Director
Sell
500
$18.97
$9.48K
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