# Amphastar Pharmaceuticals, Inc. (AMPH)

> Cited company facts from SEC filings, by Steadybase. Web page: https://steadybase.io/company/amphastar-pharmaceuticals-inc/ JSON: https://steadybase.io/company/amphastar-pharmaceuticals-inc.json Checked Nov 10, 2026. Latest filing read: Nov 5, 2026.

## Company

- Legal name: Amphastar Pharmaceuticals, Inc.
- Ticker: AMPH (Nasdaq)
- SEC CIK: 0001297184
- Industry: Pharmaceutical Preparations (SIC 2834)
- Headquarters: Rancho Cucamonga, CA
- Fiscal year ends: December 31
- SEC filer category: Large accelerated filer
- Website: amphastar.com
- LinkedIn: https://www.linkedin.com/company/amphastar-pharmaceuticals-inc.
- Next earnings date: Feb 4, 2027 (estimated from past 8-K timing)

## Key facts

- Revenue: $719.9M for the fiscal year ended Dec 31, 2025 (10-K filed Feb 26, 2026). Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/0001297184-26-000009-index.html
- Operating income: $140.4M for the fiscal year ended Dec 31, 2025 (10-K filed Feb 26, 2026). Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/0001297184-26-000009-index.html
- Net income: $98.1M for the fiscal year ended Dec 31, 2025 (10-K filed Feb 26, 2026). Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/0001297184-26-000009-index.html
- SG&A: $129.8M for the fiscal year ended Dec 31, 2025 (10-K filed Feb 26, 2026). Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/0001297184-26-000009-index.html
- Employees: 1,976 as of Dec 31, 2025, as reported in an SEC filing. Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm
- Shares outstanding: 42,652,154 as of Oct 30, 2026 (10-Q filed Nov 5, 2026). Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000053/0001297184-26-000053-index.html
- Auditor: Ernst & Young LLP, Irvine, California, named in the latest 10-K. Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm

## Business

We are a biopharmaceutical company focusing on developing, manufacturing, and commercializing technically challenging generic and proprietary injectable, inhalation, and intranasal products, as well as active pharmaceutical ingredient, or API products. We currently manufacture and sell over 25 prescription pharmaceutical products, and an over-the-counter product, Primatene MIST ® .

Source: Item 1. Business, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm

## Annual results

| Fiscal year ended | Revenue | Operating income | Net income | SG&A |
|---|---|---|---|---|
| Dec 31, 2025 | $719.9M | $140.4M | $98.1M | $129.8M |
| Dec 31, 2024 | $732.0M | $205.4M | $159.5M | $94.5M |
| Dec 31, 2023 | $644.4M | $197.0M | $137.5M | $80.4M |
| Dec 31, 2022 | $499.0M | $107.5M | $91.4M | $66.6M |
| Dec 31, 2021 | $437.8M | $69.9M | $62.1M | $68.9M |

Each figure comes from the annual report for that year. Filing links for every figure: https://steadybase.io/company/amphastar-pharmaceuticals-inc.json

## Officers and directors

- Jack Y. Zhang, CEO & CHIEF SCIENTIFIC OFFICER. LinkedIn: https://linkedin.com/in/jack-zhang-807859365. Source: Form 4 filed Mar 17, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000088974026000007/0000889740-26-000007-index.htm
- William J. Peters, CFO, EVP & TREASURER. Source: Form 4 filed Sep 23, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000126313626000014/0001263136-26-000014-index.htm
- Mary Z. Luo, COO, Chief Scientist, Chairman. Source: Form 4 filed Mar 17, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000088974026000007/0000889740-26-000007-index.htm
- Rong Zhou, SENIOR EVP, PRODUCTION CENTER. Source: Form 4 filed Sep 17, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000164532626000014/0001645326-26-000014-index.htm
- Yakob Liawatidewi, EVP CORP ADMIN CENTER. Source: Form 4 filed Mar 17, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000174392726000010/0001743927-26-000010-index.htm
- Jacob Liawatidewi, Executive Vice President of Sales and Marketing. LinkedIn: https://linkedin.com/in/jacob-liawatidewi-5b44a410. Source: 10-K filed Feb 26, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm
- Anthony Pierce, Class III director. Source: 8-K filed Jul 13, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000110465926082772/amph-20260709x8k.htm
- David Gaugh, Director. Source: 10-K filed Feb 26, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm
- Diane G. Gerst, Director. Source: 10-K filed Feb 26, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm
- Floyd Petersen, Director. Source: 10-K filed Feb 26, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm
- Gayle M. Deflin, Director. Source: 10-K filed Feb 26, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm
- Howard Lee, Director. Source: 10-K filed Feb 26, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm
- Michael A. Zasloff, Director. Source: 10-K filed Feb 26, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm
- Richard Prins, Director. Source: 10-K filed Feb 26, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm
- Floyd F. Petersen, Board member (per proxy). Source: DEF 14A filed Apr 13, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000023/amph-20260601xdef14a.htm
- Gayle Deflin, Board member (per proxy). Source: DEF 14A filed Apr 13, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000023/amph-20260601xdef14a.htm
- Jack Yongfeng Zhang, Board member (per proxy). Source: DEF 14A filed Apr 13, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000023/amph-20260601xdef14a.htm
- Mary Ziping Luo, Board member (per proxy). Source: DEF 14A filed Apr 13, 2026, https://www.sec.gov/Archives/edgar/data/1297184/000129718426000023/amph-20260601xdef14a.htm

## Recent 8-K events

- Nov 5, 2026: Item 2.02, Results of operations and financial condition (earnings release); Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000051/amph-20261105x8k.htm
- Aug 6, 2026: Item 2.02, Results of operations and financial condition (earnings release); Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000045/amph-20260806x8k.htm
- Jul 13, 2026: Item 5.02, Departure or appointment of directors or officers; compensation. Source: https://www.sec.gov/Archives/edgar/data/1297184/000110465926082772/amph-20260709x8k.htm
- Jul 8, 2026: Item 8.01, Other events. Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000041/amph-20260702x8k.htm
- Jun 3, 2026: Item 5.07, Submission of matters to a vote of security holders. Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000038/amph-20260601x8k.htm
- May 7, 2026: Item 2.02, Results of operations and financial condition (earnings release); Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000031/amph-20260507x8k.htm
- Mar 16, 2026: Item 8.01, Other events. Source: https://www.sec.gov/Archives/edgar/data/1297184/000110465926027814/amph-20260312x8k.htm
- Mar 6, 2026: Item 5.02, Departure or appointment of directors or officers; compensation; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000015/amph-20260303x8k.htm
- Mar 6, 2026: Item 1.01, Entry into a material definitive agreement; Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000013/amph-20260303x8k.htm
- Feb 26, 2026: Item 2.02, Results of operations and financial condition (earnings release); Item 9.01, Financial statements and exhibits. Source: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000007/amph-20260226x8k.htm

## Insider trades (Form 4)

- Nov 5, 2026: William J. Peters (CFO, EVP & TREASURER) sold 28,631 shares, about $814,669. Source: https://www.sec.gov/Archives/edgar/data/1297184/000126313626000016/0001263136-26-000016-index.htm
- Sep 21, 2026: William J. Peters (CFO, EVP & TREASURER) sold 4,139 shares, about $103,475. Source: https://www.sec.gov/Archives/edgar/data/1297184/000126313626000014/0001263136-26-000014-index.htm
- Sep 16, 2026: Rong Zhou (SENIOR EVP, PRODUCTION CENTER) sold 10,000 shares, about $239,400. Source: https://www.sec.gov/Archives/edgar/data/1297184/000164532626000014/0001645326-26-000014-index.htm
- Sep 2, 2026: Rong Zhou (SENIOR EVP, PRODUCTION CENTER) sold 3,187 shares, about $75,309. Source: https://www.sec.gov/Archives/edgar/data/1297184/000164532626000012/0001645326-26-000012-index.htm
- Aug 11, 2026: Richard K. Prins (Director) sold 7,973 shares, about $161,852. Source: https://www.sec.gov/Archives/edgar/data/1297184/000104757926000005/0001047579-26-000005-index.htm
- Aug 7, 2026: William J. Peters (CFO, EVP & TREASURER) sold 8,180 shares, about $183,886. Source: https://www.sec.gov/Archives/edgar/data/1297184/000126313626000012/0001263136-26-000012-index.htm
- Dec 17, 2025: Rong Zhou (SENIOR EVP, PRODUCTION CENTER) sold 9,787 shares, about $256,419. Source: https://www.sec.gov/Archives/edgar/data/1297184/000164532625000004/0001645326-25-000004-index.htm
- Dec 12, 2025: Floyd F. Petersen (Director) sold 4,163 shares, about $107,505. Source: https://www.sec.gov/Archives/edgar/data/1297184/000161128625000011/0001611286-25-000011-index.htm
- Nov 25, 2025: Richard K. Prins (Director) sold 4,179 shares, about $113,251. Source: https://www.sec.gov/Archives/edgar/data/1297184/000104757925000006/0001047579-25-000006-index.htm
- Nov 13, 2025: Floyd F. Petersen (Director) sold 16,679 shares, about $441,827. Source: https://www.sec.gov/Archives/edgar/data/1297184/000161128625000009/0001611286-25-000009-index.htm
- Nov 3, 2025: Floyd F. Petersen (Director) sold 500 shares, about $12,635. Source: https://www.sec.gov/Archives/edgar/data/1297184/000161128625000007/0001611286-25-000007-index.htm
- Oct 1, 2025: Floyd F. Petersen (Director) sold 500 shares, about $13,600. Source: https://www.sec.gov/Archives/edgar/data/1297184/000161128625000005/0001611286-25-000005-index.htm
- Sep 2, 2025: Floyd F. Petersen (Director) sold 500 shares, about $15,490. Source: https://www.sec.gov/Archives/edgar/data/1297184/000141588925023538/0001415889-25-023538-index.htm
- Aug 1, 2025: Floyd F. Petersen (Director) sold 500 shares, about $10,415. Source: https://www.sec.gov/Archives/edgar/data/1297184/000141588925020987/0001415889-25-020987-index.htm
- Jul 2, 2025: Floyd F. Petersen (Director) sold 500 shares, about $11,735. Source: https://www.sec.gov/Archives/edgar/data/1297184/000141588925019356/0001415889-25-019356-index.htm

## Latest filings

- 8-K filed Aug 6, 2026: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000045/amph-20260806x8k.htm
- 10-K filed Feb 26, 2026: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000009/amph-20251231x10k.htm
- 10-Q filed Aug 6, 2026: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000047/amph-20260630x10q.htm
- DEF 14A filed Apr 13, 2026: https://www.sec.gov/Archives/edgar/data/1297184/000129718426000023/amph-20260601xdef14a.htm

## About this data

SEC EDGAR filings, read by Steadybase. Every value links to the filing it came from.
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