| Mar 1, 2019 SForm 4 → | Mar 1, 8:01 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 7,500 | $24.99 | $187,425 | 168,318 | −4.27% | plan? |
| Mar 1, 2019 MForm 4 → | Mar 1, 8:01 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 7,500 | $20.26 | $151,950 | 175,818 | — | plan? |
| Feb 14, 2019 SForm 4 → | Feb 15, 4:56 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 7,519 | $23.99 | $180,381 | 168,318 | −4.28% | plan? |
| Feb 14, 2019 MForm 4 → | Feb 15, 4:56 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 7,519 | $15.23 | $114,514 | 175,837 | — | plan? |
| Jan 23, 2019 SForm 4 → | Jan 25, 4:11 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 15,497 | $22.39 | $347,019 | 168,318 | −8.43% | plan? |
| Dec 3, 2018 SForm 4 → | Dec 6, 3:54 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 16,630 | $22.44 | $373,177 | 183,815 | −8.30% | plan? |
| Dec 3, 2018 MForm 4 → | Dec 6, 3:54 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 16,630 | $10.48 | $174,282 | 200,445 | — | plan? |
| Nov 14, 2018 SForm 4 → | Nov 15, 7:20 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 16,015 | $20.41 | $326,855 | 183,490 | −8.03% | plan? |
| Nov 8, 2018 SForm 4 → | Nov 9, 9:52 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 52,296 | $20.77 | $1,086,420 | 199,505 | −20.8% | plan? |
| Nov 8, 2018 MForm 4 → | Nov 9, 9:52 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 52,296 | $10.59 | $554,065 | 215,600 | — | plan? |
| Jul 11, 2018 SForm 4 → | Jul 12, 5:53 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 14,399 | $16.77 | $241,422 | 199,505 | −6.73% | plan? |
| Mar 26, 2018 FForm 4 → | Mar 28, 5:22 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 12,325 | $18.52 | $228,272 | 212,561 | — | plan? |
| Mar 19, 2018 SForm 4 → | Mar 20, 8:02 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 20,000 | $19.43 | $388,638 | 224,886 | −8.17% | plan? |
| Mar 16, 2018 FForm 4 → | Mar 20, 8:02 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 11,981 | $19.91 | $238,542 | 244,886 | — | plan? |
| Mar 15, 2018 AForm 4 → | Mar 16, 6:14 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 39,919 | — | — | 256,867 | — | plan? |
| Mar 13, 2018 SForm 4 → | Mar 15, 4:15 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 700 | $20.45 | $14,315 | 216,948 | −0.32% | plan? |
| Mar 13, 2018 MForm 4 → | Mar 15, 4:15 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 700 | $11.79 | $8,253 | 217,348 | — | plan? |
| Jan 25, 2018 SForm 4 → | Jan 26, 6:02 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 18,627 | $19.42 | $361,747 | 216,948 | −7.91% | plan? |
| Jul 5, 2017 FForm 4 → | Jul 7, 4:51 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 3,394 | $17.95 | $60,922 | 235,493 | — | plan? |
| May 30, 2017 SForm 4 → | Jun 1, 8:05 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 11,482 | $16.92 | $194,300 | 237,688 | −4.61% | plan? |
| Mar 26, 2017 FForm 4 → | Mar 28, 8:08 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 10,652 | $14.04 | $149,600 | 249,170 | — | plan? |
| Mar 16, 2017 AFForm 4 → | Mar 20, 8:58 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 70,719 | $13.75 | $96,924 | 259,822 | — | plan? |
| Nov 25, 2016 SForm 4 → | Nov 29, 6:13 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 26,335 | $20.48 | $539,258 | 202,961 | −11.5% | plan? |
| Nov 25, 2016 MForm 4 → | Nov 29, 6:13 pm EST | Amphastar Pharmaceuticals, Inc.AMPH | 26,335 | $10.93 | $287,842 | 227,253 | — | plan? |
| Sep 26, 2016 SForm 4 → | Sep 27, 6:26 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 56,996 | $19.50 | $1,111,268 | 202,961 | −21.9% | plan? |
| Sep 26, 2016 MForm 4 → | Sep 27, 6:26 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 56,996 | $10.93 | $622,966 | 259,957 | — | plan? |
| Aug 22, 2016 SForm 4 → | Aug 24, 6:38 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 10,000 | $19.95 | $199,500 | 202,961 | −4.70% | plan? |
| Aug 22, 2016 MForm 4 → | Aug 24, 6:38 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 10,000 | $10.46 | $104,600 | 212,961 | — | plan? |
| Aug 17, 2016 SForm 4 → | Aug 19, 7:23 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 5,987 | $18.86 | $112,909 | 202,961 | −2.87% | plan? |
| Aug 11, 2016 SForm 4 → | Aug 15, 7:37 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 5,636 | $18.01 | $101,482 | 208,948 | −2.63% | plan? |
| Jul 5, 2016 FForm 4 → | Jul 7, 4:39 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 3,394 | $16.33 | $55,424 | 214,584 | — | plan? |
| Jun 9, 2016 SForm 4 → | Jun 13, 8:16 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 9,904 | $16.43 | $162,723 | 216,610 | −4.37% | plan? |
| May 25, 2016 SForm 4 → | May 26, 7:19 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 1,074 | $15.60 | $16,754 | 226,514 | −0.47% | plan? |
| Mar 26, 2016 FForm 4 → | Mar 29, 7:24 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 10,652 | $11.96 | $127,398 | 227,588 | — | plan? |
| Mar 17, 2016 AForm 4 → | Mar 21, 8:04 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 75,022 | — | — | 238,240 | — | plan? |
| Oct 3, 2015 FForm 4 → | Oct 6, 4:30 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 987 | $11.69 | $11,538 | 159,030 | — | plan? |
| Sep 28, 2015 FForm 4 → | Sep 30, 4:30 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 770 | $10.97 | $8,447 | 160,017 | — | plan? |
| Mar 27, 2015 FForm 4 → | Jul 7, 5:14 pm EDT | Amphastar Pharmaceuticals, Inc.AMPH | 9,289 | $16.09 | $149,472 | 160,787 | — | plan? late |
| Jul 7, 2014 AFForm 4 → | Mar 30, 2015, 6:02 am EDT | Amphastar Pharmaceuticals, Inc.AMPH | 57,690 | $9.43 | $70,948 | 170,076 | — | plan? late |