William Peters compensation by year
Amphastar Pharmaceuticals Summary Compensation Table · all 7 fiscal years held| Component | FY2019 | FY2020 | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|---|---|
| Salary | $528,539 | $547,489 | $572,135 | $584,058 | $612,579 | $625,527 | $649,846 |
| Bonus | $113,939 | $297,231 | $261,408 | $264,147 | $283,232 | $292,616 | $370,308 |
| Stock awards | $525,020 | $524,992 | $664,388 | $763,967 | $840,485 | $907,459 | $1,043,982 |
| Option awards | $524,989 | $525,014 | $664,427 | $764,034 | $840,529 | $907,546 | $1,044,022 |
| Non-equity incentive | $223,900 | $189,992 | $226,000 | $222,000 | $261,000 | $121,000 | $73,000 |
| Pension and deferred compensation | $0 | $0 | $0 | $0 | $0 | $0 | — |
| All other | $40,633 | $53,967 | $52,290 | $48,972 | $55,475 | $56,713 | $57,524 |
| Total | $1,957,020 | $2,138,685 | $2,440,648 | $2,647,178 | $2,893,300 | $2,910,861 | $3,238,682 |
Each year as stated in that year's proxy. A dash means the company reported no figure in that column. Source: Amphastar Pharmaceuticals, Inc. DEF 14A filed April 13, 2026, accession 0001297184-26-000023, and prior-year filings. Open the filing on EDGAR.
How this page was built: the Amphastar Pharmaceuticals, Inc. filed document, accession 0001297184-26-000023. Every figure is read from that document and cited to the page and table it appears in. Filed April 13, 2026.
Equity holdings
unvested awards at FY2025 year-end| Type | Unvested units | Value at year-end | Exercise price |
|---|---|---|---|
| RSU | 36,747 | $984,085 | — |
| RSU | 14,580 | $390,452 | — |
| RSU | 11,962 | $320,342 | — |
| RSU | 5,497 | $147,210 | — |
| Option | 12,685 | — | $34.74 |
| Option | 78,039 | — | $28.41 |
| Option | 30,716 | — | $46.68 |
| Option | 25,208 | — | $35.13 |
Per the Outstanding Equity Awards at Fiscal Year-End table in Amphastar Pharmaceuticals, Inc.'s FY2025 proxy; value at the fiscal year-end close, as the company printed it.
Insider transactions since the last proxy
10 Form 4 lines since the FY2025 proxy (filed April 13, 2026)current to 2026-11-10 · updated nightly
| Date | Transaction | Plan | Shares | Price | Held after |
|---|---|---|---|---|---|
| 2026-11-05 | Sale | 10b5-1 | 12,631 | $28.99 | 167,076 |
| 2026-11-05 | Exercise or conversion | 10b5-1 | 11,000 | $17.99 | 179,707 |
| 2026-11-05 | Exercise or conversion derivative | 10b5-1 | 11,000 | $0.00 | 67,833 |
| 2026-11-04 | Sale | 10b5-1 | 16,000 | $28.03 | 168,707 |
| 2026-11-04 | Exercise or conversion | 10b5-1 | 16,000 | $13.03 | 184,707 |
| 2026-11-04 | Exercise or conversion derivative | 10b5-1 | 16,000 | $0.00 | 7,674 |
| 2026-09-21 | Sale | 10b5-1 | 4,139 | $25.00 | 168,707 |
| 2026-08-07 | Exercise or conversion derivative | 10b5-1 | 5,053 | $0.00 | 0 |
The 8 most recent of 10 lines, each as reported on the Form 4. "10b5-1" marks a trade the filing reports under a pre-arranged trading plan. View every Form 4 filing on EDGAR →
Amphastar Pharmaceuticals’s named executive officers, FY2025
as the company reported each| Named executive officer | Role | FY2025 total |
|---|---|---|
| Jack Yongfeng Zhang | Chief Executive Officer, President, Chief Scientific Officer and Director | $8,309,350 |
| Mary Ziping Luo | Chief Operating Officer, Chief Scientist and Chairman of the Board of Directors | $4,031,078 |
| William Peters · this page | Chief Financial Officer, Executive Vice President of Finance, Treasurer, President of International Medication Systems, Limited, and Director | $3,238,682 |
| Rong Zhou | Senior Executive Vice President of Production Center; Executive Vice President of Scientific Affairs and President of Amphastar Nanjing Pharmaceuticals, Co., Ltd. | $2,542,634 |
| Jacob Liawatidewi | Executive Vice President of Sales and Marketing and Corporate Administration Center, President of Amphastar France Pharmaceuticals, S.A.S., Corporate Secretary and Director | $2,037,856 |
Board service
Amphastar Pharmaceuticals board · FY2022–FY2025How this board is paid
Company policy: Amphastar Pharmaceuticals pays directors a $55,000 cash retainer and $260,000 in equity. As stated in Amphastar Pharmaceuticals's FY2025 proxy.
William Peters's compensation dossier, Amphastar Pharmaceuticals
You have read William Peters's totals and holdings. The dossier adds each equity grant Amphastar Pharmaceuticals disclosed for William Peters and Amphastar Pharmaceuticals's own disclosed peer group, where the company discloses them, with every row in a PDF and a CSV cited to its filing.
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How this record is built
Every figure on this page is one figure from a public SEC filing, printed as the filing states it and cited to the document. Compensation totals are Amphastar Pharmaceuticals's own disclosed totals, not summed by Velarion. Insider transactions are read from Form 4 filings and cover every line filed since the most recent proxy. Nothing is estimated by Velarion; where the company does not disclose a value the cell reads "—", and a section appears only where the company discloses the data. Corrections: records@velarion.ai.
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