Dudediligence.

Amphastar Pharmaceuticals, Inc

AMPHNASDAQ · Pharmaceutical Preparations
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Last 12 months

Sales planned on beside the trades reported on , and whether each names a .

Planned ·

$3,163,955

11 notices · 127,838 sh

Oct 2025 to Oct 2026

Reported ·

$931,637

6 sales · 0 buys

Oct 2025 to Jun 2026

The two figures cover different periods.

1 of 6 reported sales carry the 10b5-1 box. Together they are 0.08% of the shares on issue.

PLANNED · FORM 144Oct 2025 to Oct 2026REPORTED · FORM 4Oct 2025 to Jun 2026N2025DJ2026FMAMJJASO2026-09-21: PETERS WILLIAM J, Form 1442026-09-01: Rong Zhou, Form 1442026-08-18: Floyd Petersen, Form 1442026-08-11: Richard Prins, Form 1442026-08-07: PETERS WILLIAM J, Form 1442025-12-11: Floyd Petersen, Form 1442025-12-10: Floyd Petersen, Form 1442025-11-28: Rong Zhou, Form 1442025-11-25: Richard Prins, Form 1442025-11-13: Floyd Petersen, Form 1442025-11-03: Petersen Floyd F., Form 1442025-11-03: Petersen Floyd F., sold2025-11-13: Petersen Floyd F., sold2025-11-25: PRINS RICHARD K, sold2025-12-11: Petersen Floyd F., sold2025-12-17: Zhou Rong, sold
under a no plan named▼ salesize is dollars

Form 144 notices, newest first

2026-09-21PETERS WILLIAM J, CFO, EVP & TREASURER$103,475
4,139 shplan 2026-03-10Form 4s on file end Jun 23144 ↗
2026-09-01Rong Zhou, SENIOR EVP, PRODUCTION CENTER$290,114
13,187 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-18Floyd Petersen, Director$989,121
47,101 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-11Richard Prins, Director$161,932
7,973 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-07PETERS WILLIAM J, CFO, EVP & TREASURER$183,886
8,180 shplan 2026-03-10Form 4s on file end Jun 23144 ↗
2025-12-11Floyd Petersen, Director$333,040
4,163 shno plan date144 ↗
Form 4, 2025-12-15: sold 4,163 at $25.82 Form 4 ↗
2025-12-10Floyd Petersen, Director$43,425
1,737 shno plan dateno Form 4 on file144 ↗
2025-11-28Rong Zhou, SENIOR EVP, PRODUCTION CENTER$500,000
20,000 shno plan date144 ↗
Form 4, 2025-12-18: sold 9,787 at $26.20 Form 4 ↗
2025-11-25Richard Prins, Director$104,475
4,179 shno plan date144 ↗
Form 4, 2025-11-25: sold 4,179 at $27.10 Form 4 ↗
2025-11-13Floyd Petersen, Director$441,837
16,679 shno plan date144 ↗
Form 4, 2025-11-17: sold 16,679 at $26.49 Form 4 ↗
2025-11-03Petersen Floyd F., Director$12,650
500 shplan 2024-11-26144 ↗
Form 4, 2025-11-05: sold 500 at $25.27 Form 4 ↗