Amphastar Pharmaceuticals, Inc.
AMPHFigures shown here come from public SEC filings. Dates beside each section show the available history.
How Amphastar Pharmaceuticals, Inc. Makes Money
Follow each dollar of revenue through to what shareholders keep.
From revenue to net income
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Financial Summary
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SEC filings supply these figures; updates after the dates shown are not included. This page includes 14 annual periods. The latest annual period ends Dec 31, 2025. The latest insider filing shown is dated Jun 3, 2026. The latest institutional report shown is dated Mar 31, 2026; other ownership filings may exist.
Ownership
Who holds the shares, as reported in SEC ownership filings.
Reported 13F positions
Each row shows what a filer reported for one date, not a current position. The link opens that filing.
| Filer | Report date | Shares | Value | Filing |
|---|---|---|---|---|
| Mirae Asset Global Investments Co., Ltd. | 2026-03-31 | 2,366 | $46.4K | SEC filing |
| CITADEL ADVISORS LLC | 2026-03-31 | 65,540 | $1.28M | SEC filing |
| Optiver Holding B.V. | 2026-03-31 | 28 | $549 | SEC filing |
| China Universal Asset Management Co., Ltd. | 2026-03-31 | 8,051 | $158K | SEC filing |
| SBI Securities Co., Ltd. | 2026-03-31 | 44 | $862 | SEC filing |
| Pinnacle Wealth Planning Services, Inc. | 2026-03-31 | 283 | $5.54K | SEC filing |
| Smartleaf Asset Management LLC | 2026-03-31 | 273 | $5.25K | SEC filing |
| Vestcor Inc | 2026-03-31 | 10,949 | Not shown | SEC filing |
| EverSource Wealth Advisors, LLC | 2026-03-31 | 24 | $470 | SEC filing |
| Police & Firemen's Retirement System of New Jersey | 2026-03-31 | 10,263 | $201K | SEC filing |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2026-03-31 | 44,903 | Not shown | SEC filing |
| CoreCap Advisors, LLC | 2026-03-31 | 107 | $2.1K | SEC filing |
| MassMutual Private Wealth & Trust, FSB | 2026-03-31 | 224 | $4.39K | SEC filing |
| ROYCE & ASSOCIATES LP | 2026-03-31 | 406,175 | $7.96M | SEC filing |
| TWO SIGMA INVESTMENTS, LP | 2026-03-31 | 138,148 | $2.71M | SEC filing |
| Elequin Capital, LP | 2026-03-31 | 7 | $137 | SEC filing |
| Quantedge Capital Pte Ltd | 2026-03-31 | 13,500 | $264K | SEC filing |
| NATIXIS ADVISORS, LLC | 2026-03-31 | 11,510 | Not shown | SEC filing |
| Essential Partners LLC | 2026-03-31 | 121 | $2.37K | SEC filing |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC | 2026-03-31 | 103,929 | $2.04M | SEC filing |
- Each value is checked against Amphastar Pharmaceuticals, Inc.'s share prices from within about three months of its report date (insiders' Form 4 trades and the latest close).
- Value not shown for 3 rows: the filed value is about 1,000 times too small for the share count at Amphastar Pharmaceuticals, Inc.'s share price.
120 filers have only one report here.
Unusually large insider trades
Each trade is compared with the other insider trades of the same kind in the same security among Amphastar Pharmaceuticals, Inc.'s recent filings on file. Size alone is context, not a prediction or evidence of improper trading.
- 2024-01-10 · Luo Mary Z.: Larger than 54 of the 56 other insider sales of Common Stock on file. SEC filing
- 2024-01-10 · Luo Mary Z.: Larger than all 56 other insider sales of Common Stock on file. SEC filing
- 2024-01-09 · Luo Mary Z.: Larger than 51 of the 56 other insider sales of Common Stock on file. SEC filing
- 2024-01-09 · Luo Mary Z.: Larger than 55 of the 56 other insider sales of Common Stock on file. SEC filing
- 2024-01-08 · Luo Mary Z.: Larger than 53 of the 56 other insider sales of Common Stock on file. SEC filing
- 2024-01-08 · Luo Mary Z.: Larger than 52 of the 56 other insider sales of Common Stock on file. SEC filing
Purchases & sales (open market or private)
| Security | Code | Price | Filing | |||
|---|---|---|---|---|---|---|
| 2025-12-17 | Zhou Rong · SENIOR EVP, PRODUCTION CENTER | Common Stock | S — Open market or private sale | −9,787 | 26.20 | SEC filing |
| 2025-12-12 | Petersen Floyd F. · Director | Common Stock | S — Open market or private sale | −2,426 | 25.92 | SEC filing |
| 2025-12-11 | Petersen Floyd F. · Director | Common Stock | S — Open market or private sale | −1,737 | 25.69 | SEC filing |
| 2025-11-25 | PRINS RICHARD K · Director | Common Stock | S — Open market or private sale | −4,179 | 27.10 | SEC filing |
| 2025-11-13 | Petersen Floyd F. · Director | Common Stock | S — Open market or private sale | −16,679 | 26.49 | SEC filing |
| 2025-11-03 | Petersen Floyd F. · Director | Common Stock | S — Open market or private sale | −500 | 25.27 | SEC filing |
| 2025-10-01 | Petersen Floyd F. · Director | Common Stock | S — Open market or private sale | −500 | 27.20 | SEC filing |
| 2025-09-02 | Petersen Floyd F. · Director | Common Stock | S — Open market or private sale | −500 | 30.98 | SEC filing |
Showing 8 of 10 rows
Grants, exercises, tax & gifts
| Security | Code | Filing | |||
|---|---|---|---|---|---|
| 2026-06-02 | Lee Howard · Director | Common Stock | F — Payment of exercise price or tax by delivering securities | −769 | SEC filing |
| 2026-06-01 | Lee Howard · Director | Common Stock | A — Grant, award, or other acquisition | +8,143 | SEC filing |
| 2026-06-01 | Gaugh David Russell · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +17,365 | SEC filing |
| 2026-06-01 | PRINS RICHARD K · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +17,365 | SEC filing |
| 2026-06-01 | ZASLOFF MICHAEL A · Director | Common Stock | A — Grant, award, or other acquisition | +8,143 | SEC filing |
| 2026-06-01 | Lee Howard · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +17,365 | SEC filing |
| 2026-06-01 | PRINS RICHARD K · Director | Common Stock | A — Grant, award, or other acquisition | +8,143 | SEC filing |
| 2026-06-01 | Gerst Diane G. · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +17,365 | SEC filing |
Showing 8 of 35 rows
These tables describe filed transactions, not current holdings. Prices are shown as filed; a currency is added only when the filing's data names one. Amended and possible duplicate rows are left out of size comparisons and transaction groups.