Stephen B. Shohet is Director at Amphastar Pharmaceuticals, Inc. (AMPH). They have made 16 open-market trades across 1 company since 2016, most recently 2026-09-21.
CIK 0001297184
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 16 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AMPH | 168,707 | $4.4M |
Shares reported on the most recent Form 4, priced at the 2026-09-23 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| AMPH | SELL · 10b5-1 | 2026-09-21 | 2026-09-23 | $25.00 | $103K | +2.5% | — | — |
| AMPH | SELL | 2026-09-02 | 2026-09-03 | $23.63 | $75K | +1.5% | +7.4% | — |
| AMPH | SELL | 2018-12-10 | 2018-12-12 | $21.72 | $1.3M | -10.2% | +4.3% | +14.0% |
| AMPH | SELL | 2017-12-14 | 2017-12-14 | $18.87 | $148K | +5.4% | +0.2% | +8.0% |
| AMPH | SELL | 2017-12-07 | 2017-12-08 | $18.34 | $144K | +4.4% | -2.5% | +1.6% |
| AMPH | SELL | 2017-11-30 | 2017-11-30 | $19.25 | $151K | -1.7% | -2.2% | -6.3% |
| AMPH | SELL | 2017-11-22 | 2017-11-24 | $18.94 | $149K | +0.1% | +7.2% | +2.8% |
| AMPH | SELL | 2017-11-16 | 2017-11-17 | $18.04 | $142K | +7.6% | +7.3% | +4.6% |
| AMPH | SELL | 2017-11-09 | 2017-11-09 | $18.66 | $130K | +0.8% | -0.7% | -4.2% |
| AMPH | SELL | 2017-11-02 | 2017-11-03 | $18.37 | $144K | -6.7% | -1.4% | -1.1% |
| AMPH | SELL | 2017-10-26 | 2017-10-26 | $18.39 | $145K | -3.2% | -2.4% | +4.5% |
| AMPH | SELL | 2017-10-19 | 2017-10-19 | $18.34 | $144K | -2.5% | -1.1% | +4.9% |
| AMPH | SELL | 2017-10-12 | 2017-10-13 | $18.73 | $147K | -2.9% | -4.6% | -3.0% |
| AMPH | SELL | 2016-08-16 | 2016-08-16 | $18.35 | $196K | +6.0% | +1.8% | +11.9% |
| AMPH | SELL | 2016-08-15 | 2016-08-16 | $18.26 | $418K | +6.0% | +1.8% | +11.9% |
| AMPH | SELL | 2016-08-12 | 2016-08-16 | $18.24 | $882K | +6.0% | +1.8% | +11.9% |
| AMPH | SELL | 2016-08-12 | 2016-08-16 | $18.12 | $268K | +6.0% | +1.8% | +11.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.