Amphastar Pharmaceuticals, Inc.
AMPHReported to SECin USCIK 0001297184Filings at SEC EDGAR
No score on this page, by design. Everything here is a fact from a public U.S. register: insider filings at the SEC (Form 4), lobbying filings under the Lobbying Disclosure Act, trades reported by members of Congress under the STOCK Act, and fund holdings in 13F filings. Our scores, percentiles and signals run on the Dutch register only, because that is the only register the model has been validated on.
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The most recent filings
Most recent filing first: every line of every Form 4 at this company that passed our review, the same lines as on the register. Reported is the day the filing reached the SEC, usually within two business days of the trade. Amounts are in U.S. dollars, as the form states them.
| Filed by | Type | Value | Reported | Filed by | Value | Type | Shares | Reported |
|---|---|---|---|---|---|---|---|---|
| PETERS WILLIAM JCFO, EVP & TREASURER | Open-market sell | $103,4754,139 shares | Sep 23, 2026 | PETERS WILLIAM JCFO, EVP & TREASURER | $103,475 | Open-market sell | 4,139 | Sep 23, 2026 |
| Zhou RongSENIOR EVP, PRODUCTION CENTER | Option exercise | nothing paid10,000 shares | Sep 17, 2026 | Zhou RongSENIOR EVP, PRODUCTION CENTER | nothing paid | Option exercise | 10,000 | Sep 17, 2026 |
| Zhou RongSENIOR EVP, PRODUCTION CENTER | Open-market sell | $239,40410,000 shares | Sep 17, 2026 | Zhou RongSENIOR EVP, PRODUCTION CENTER | $239,404 | Open-market sell | 10,000 | Sep 17, 2026 |
| Zhou RongSENIOR EVP, PRODUCTION CENTER | Option exercise | $133,50010,000 shares | Sep 17, 2026 | Zhou RongSENIOR EVP, PRODUCTION CENTER | $133,500 | Option exercise | 10,000 | Sep 17, 2026 |
| Zhou RongSENIOR EVP, PRODUCTION CENTER | Open-market sell | $75,3063,187 shares | Sep 3, 2026 | Zhou RongSENIOR EVP, PRODUCTION CENTER | $75,306 | Open-market sell | 3,187 | Sep 3, 2026 |