Amphastar Pharmaceuticals, Inc. (AMPH) SEC filings
AMPH SEC filings moved a median of -0.46% by the close. AMPH SEC filings — 10-K, 10-Q, 8-K and the rest — each read against the price at its own news timestamp. Back to the AMPH overview →
49 measured AMPH SEC filing events.
Where these AMPH SEC filings landedvs 48 measured AMPH SEC filing reactions
| Middle 50% of AMPH SEC filing reactions | -3.13% to +2.10% |
|---|---|
| Median reaction (to close) | -0.46% |
| Measured reactions | 48 |
Point-in-time · zero look-ahead
Half of the 48 AMPH SEC filing events with a measured close landed between -3.13% and +2.10%; 48% closed up.
| Date | Headline | Event | 5-min | To close |
|---|---|---|---|---|
| Form 10-Q Amphastar Pharmaceutical For: Jun 30 | SEC filing · Form 10-Q | -6.98% | -7.56% | |
| Form 8-K Amphastar Pharmaceutical For: Aug 06 | SEC filing · Form 8-K | -6.98% | -7.56% | |
| Form 8-K Amphastar Pharmaceutical For: Jul 09 | SEC filing · Form 8-K | +0.00% | +1.53% | |
| Form 8-K Amphastar Pharmaceutical For: Jul 02 | SEC filing · Form 8-K | -0.78% | -5.41% | |
| Form 8-K Amphastar Pharmaceutical For: Jun 01 | SEC filing · Form 8-K | +1.15% | +2.30% | |
| Form 10-Q Amphastar Pharmaceutical For: Mar 31 | SEC filing · Form 10-Q | -0.48% | +2.10% | |
| Form 8-K Amphastar Pharmaceutical For: May 07 | SEC filing · Form 8-K | -0.48% | +2.10% | |
| Form ARS Amphastar Pharmaceutical For: Dec 31 | SEC filing · Form ARS | -0.14% | +0.09% | |
| Form DEF 14A Amphastar Pharmaceutical For: Jun 01 | SEC filing · Form DEF | -0.14% | +0.09% | |
| Form DEFA14A Amphastar Pharmaceutical | SEC filing · Form DEFA14A | -0.14% | +0.09% | |
| Form 8-K Amphastar Pharmaceutical For: Mar 12 | SEC filing · Form 8-K | +1.27% | +2.54% | |
| Form 8-K Amphastar Pharmaceutical For: Mar 03 | SEC filing · Form 8-K | +0.16% | +1.26% | |
| Form 10-K Amphastar Pharmaceutical For: Dec 31 | SEC filing · Form 10-K | -1.60% | -9.85% | |
| Form 8-K Amphastar Pharmaceutical For: Feb 26 | SEC filing · Form 8-K | -1.60% | -9.85% | |
| Form 8-K Amphastar Pharmaceutical For: Jan 06 | SEC filing · Form 8-K | -0.84% | -0.86% | |
| Form 10-Q Amphastar Pharmaceutical For: Sep 30 | SEC filing · Form 10-Q | -4.89% | -8.11% | |
| Form 8-K Amphastar Pharmaceutical For: Nov 06 | SEC filing · Form 8-K | -4.89% | -8.11% | |
| Form 8-K Amphastar Pharmaceutical For: Oct 21 | SEC filing · Form 8-K | +0.31% | -1.40% | |
| Form 8-K Amphastar Pharmaceutical For: Sep 15 | SEC filing · Form 8-K | -0.91% | +0.99% | |
| Form 8-K Amphastar Pharmaceutical For: Aug 08 | SEC filing · Form 8-K | +0.40% | — | |
| Form 10-Q Amphastar Pharmaceutical For: Jun 30 | SEC filing · Form 10-Q | +4.67% | +7.88% | |
| Form 8-K Amphastar Pharmaceutical For: Aug 07 | SEC filing · Form 8-K | +4.67% | +7.88% | |
| Form 8-K Amphastar Pharmaceutical For: Jul 18 | SEC filing · Form 8-K | +1.55% | +0.28% | |
| Form 8-K Amphastar Pharmaceutical For: Jun 02 | SEC filing · Form 8-K | +0.90% | -0.58% | |
| Form 10-Q Amphastar Pharmaceutical For: Mar 31 | SEC filing · Form 10-Q | +0.67% | -1.75% | |
| Form 8-K Amphastar Pharmaceutical For: May 07 | SEC filing · Form 8-K | -1.34% | +0.24% | |
| Form ARS Amphastar Pharmaceutical For: Dec 31 | SEC filing · Form ARS | +0.56% | -3.13% | |
| Form DEF 14A Amphastar Pharmaceutical For: Jun 02 | SEC filing · Form DEF | +0.56% | -3.13% | |
| Form DEFA14A Amphastar Pharmaceutical | SEC filing · Form DEFA14A | +0.56% | -3.13% | |
| Form PRE 14A Amphastar Pharmaceutical For: Jun 02 | SEC filing · Form PRE | +0.49% | -1.55% | |
| Form 10-K Amphastar Pharmaceutical For: Dec 31 | SEC filing · Form 10-K | +0.37% | +1.51% | |
| Form 8-K Amphastar Pharmaceutical For: Feb 27 | SEC filing · Form 8-K | +0.03% | -7.09% | |
| Form 10-Q Amphastar Pharmaceutical For: Sep 30 | SEC filing · Form 10-Q | +0.38% | +4.61% | |
| Form 8-K Amphastar Pharmaceutical For: Nov 06 | SEC filing · Form 8-K | +4.00% | -1.96% | |
| Form 8-K Amphastar Pharmaceutical For: Aug 28 | SEC filing · Form 8-K | +0.37% | -2.77% | |
| Form 10-Q Amphastar Pharmaceutical For: Jun 30 | SEC filing · Form 10-Q | +0.19% | +0.49% | |
| Form 8-K Amphastar Pharmaceutical For: Aug 07 | SEC filing · Form 8-K | +0.99% | +3.69% | |
| Form 8-K Amphastar Pharmaceutical For: Jun 03 | SEC filing · Form 8-K | +0.00% | -1.43% | |
| Form 10-Q Amphastar Pharmaceutical For: Mar 31 | SEC filing · Form 10-Q | -0.75% | -0.75% | |
| Form 8-K Amphastar Pharmaceutical For: May 08 | SEC filing · Form 8-K | -0.92% | -6.87% | |
| Form DEFA14A Amphastar Pharmaceutical | SEC filing · Form DEFA14A | -0.05% | -0.35% | |
| Form ARS Amphastar Pharmaceutical For: Dec 31 | SEC filing · Form ARS | +0.23% | +2.46% | |
| Form DEF 14A Amphastar Pharmaceutical For: Jun 03 | SEC filing · Form DEF | +0.23% | +2.46% | |
| Form DEFA14A Amphastar Pharmaceutical | SEC filing · Form DEFA14A | +0.23% | +2.46% | |
| Form 10-K Amphastar Pharmaceutical For: Dec 31 | SEC filing · Form 10-K | -1.30% | -1.51% | |
| Form S-8 Amphastar Pharmaceutical | SEC filing · Form S-8 | -1.30% | -1.51% | |
| Form 8-K Amphastar Pharmaceutical For: Feb 28 | SEC filing · Form 8-K | -6.49% | -6.50% | |
| Form 10-Q Amphastar Pharmaceutical For: Sep 30 | SEC filing · Form 10-Q | +3.29% | +9.16% | |
| Form 8-K Amphastar Pharmaceutical For: Nov 08 | SEC filing · Form 8-K | +3.29% | +9.16% |
Keep exploring
More AMPH: earnings → · analyst actions → · AMPH overview →
Other Healthcare names and their SEC filings
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| IPSEN SA S/ADR (IPSEY) | 294 | 0.00% | 6% |
| Adicet Bio, Inc. (ACET) | 293 | -0.83% | 36% |
| Merus N.V. - Common Shares (MRUS) | 292 | +0.03% | 54% |
| Trinity Biotech plc - American Depositary Shares (TRIB) | 292 | -0.13% | 44% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not. These are each name’s all-news baseline, not its SEC filings — that is what the link opens.