AMPH · ISSUER CIK 1297184
Amphastar Pharmaceuticals, Inc.
Between Aug 1, 2026 and Oct 29, 2026, 3 Amphastar Pharmaceuticals, Inc. insiders reported $0.00 of open-market purchases and $764K of sales on SEC Form 4.
↗3 insiders filed
Original Form 4 filings from Aug 1, 2026 to Oct 29, 2026. 2 of 5 sales were reported under a 10b5-1 plan.
$0.00Insider buying
$764KInsider selling
−$764KNet open-market
Sep 23, 2026Latest filing
| Ticker | Insider | Type | Owned | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 23, 202618:02 | Sep 21, 2026 | AMPH | CFO, EVP & TREASURER, Director | S · Sell10b5-1 | $25.00 | −4,139 | 168,707 | -2% | −$103K | ||
| Sep 17, 202618:19 | Sep 16, 2026 | AMPH | SENIOR EVP, PRODUCTION CENTER | S · Sell | $23.94 | −10,000 | 169,203 | -6% | −$239K | ||
| Sep 17, 202618:19 | Sep 16, 2026 | AMPH | SENIOR EVP, PRODUCTION CENTER | M · Exercise | $13.35 | +10,000 | 179,203 | +6% | $134K | ||
| Sep 3, 202619:42 | Sep 2, 2026 | AMPH | SENIOR EVP, PRODUCTION CENTER | S · Sell | $23.63 | −3,187 | 169,203 | -2% | −$75K | ||
| Aug 12, 202618:14 | Aug 11, 2026 | AMPH | Director | S · Sell | $20.30 | −7,973 | 29,625 | -21% | −$162K | ||
| Aug 11, 202616:57 | Aug 7, 2026 | AMPH | CFO, EVP & TREASURER, Director | S · Sell10b5-1 | $22.48 | −8,180 | 172,846 | -5% | −$184K | ||
| Aug 11, 202616:57 | Aug 7, 2026 | AMPH | CFO, EVP & TREASURER, Director | M · Exercise10b5-1 | $19.79 | +5,053 | 181,026 | +3% | $100K |