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

40
Insider
Date
Role
Action
Shares
Price
Amount
William J Peters
21 Sep 2026
CFO, EVP & Treasurer
Sold on a plan
4,139
$25.00
$103.48K
Floyd F. Petersen
3 Nov 2025
Director
Sold on a plan
500
$25.27
$12.63K
Floyd F. Petersen
1 Oct 2025
Director
Sold on a plan
500
$27.20
$13.60K
Floyd F. Petersen
2 Sep 2025
Director
Sold on a plan
500
$30.98
$15.49K
Floyd F. Petersen
1 Aug 2025
Director
Sold on a plan
500
$20.83
$10.42K
Floyd F. Petersen
2 Jul 2025
Director
Sold on a plan
500
$23.47
$11.73K
Floyd F. Petersen
2 Jun 2025
Director
Sold on a plan
500
$25.67
$12.84K
Floyd F. Petersen
1 May 2025
Director
Sold on a plan
500
$24.08
$12.04K
Floyd F. Petersen
1 Apr 2025
Director
Sold on a plan
500
$28.38
$14.19K
Floyd F. Petersen
6 Mar 2025
Director
Sold on a plan
1,000
$27.99
$27.99K
William J Peters
27 Jun 2024
CFO, EVP & Treasurer
Sold on a plan
635
$41.29
$26.22K
William J Peters
27 Jun 2024
CFO, EVP & Treasurer
Sold on a plan
2,961
$40.85
$120.95K
Floyd F. Petersen
3 Jun 2024
Director
Sold on a plan
500
$42.65
$21.33K
Floyd F. Petersen
1 May 2024
Director
Sold on a plan
500
$41.67
$20.84K
Floyd F. Petersen
1 Apr 2024
Director
Sold on a plan
500
$43.43
$21.71K
Floyd F. Petersen
1 Mar 2024
Director
Sold on a plan
49
$46.53
$2.28K
Floyd F. Petersen
1 Mar 2024
Director
Sold on a plan
451
$45.60
$20.57K
Floyd F. Petersen
1 Feb 2024
Director
Sold on a plan
26
$53.64
$1.39K
Floyd F. Petersen
1 Feb 2024
Director
Sold on a plan
474
$53.07
$25.15K
Mary Z. Luo
10 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
1,716
$57.00
$97.82K
Mary Z. Luo
10 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
920
$55.95
$51.48K
Mary Z. Luo
10 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
50,514
$54.89
$2.77M
Mary Z. Luo
10 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
78,236
$54.32
$4.25M
Mary Z. Luo
9 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
3,714
$58.35
$216.72K
Mary Z. Luo
9 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
31,764
$57.70
$1.83M
Mary Z. Luo
9 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
50,678
$56.70
$2.87M
Mary Z. Luo
8 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
2,152
$63.27
$136.15K
Mary Z. Luo
8 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
1,663
$61.81
$102.78K
Mary Z. Luo
8 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
4,261
$61.19
$260.74K
Mary Z. Luo
8 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
27,563
$59.99
$1.65M
Mary Z. Luo
8 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
37,865
$59.24
$2.24M
Mary Z. Luo
8 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
41,282
$58.25
$2.40M
Mary Z. Luo
8 Jan 2024
COO,Chief Scientist & Chairman
Sold on a plan
18,858
$56.98
$1.07M
Floyd F. Petersen
2 Jan 2024
Director
Sold on a plan
353
$61.70
$21.78K
Floyd F. Petersen
2 Jan 2024
Director
Sold on a plan
147
$60.56
$8.90K
Floyd F. Petersen
1 Dec 2023
Director
Sold on a plan
365
$58.15
$21.22K
Floyd F. Petersen
1 Dec 2023
Director
Sold on a plan
135
$57.24
$7.73K
Floyd F. Petersen
1 Nov 2023
Director
Sold on a plan
500
$45.30
$22.65K
Floyd F. Petersen
2 Oct 2023
Director
Sold on a plan
500
$45.78
$22.89K
Floyd F. Petersen
3 Apr 2023
Director
Sold on a plan
491
$37.72
$18.52K
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