Yakob Liawatidewi is VP at Amphastar Pharmaceuticals, Inc. (AMPH). They have made 21 open-market trades across 1 company since 2018, most recently 2026-03-15.
CIK 0001743927
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 21 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AMPH | 121,892 | $3.1M |
Shares reported on the most recent Form 4, priced at the 2026-03-17 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| AMPH | SELL · 10b5-1 | 2024-11-06 | 2024-11-08 | $52.05 | $543K | -9.1% | -9.7% | -32.4% |
| AMPH | SELL | 2023-08-28 | 2023-08-29 | $53.13 | $3.1M | -3.8% | -11.4% | +6.0% |
| AMPH | SELL · 10b5-1 | 2023-04-13 | 2023-04-14 | $41.56 | $478K | -9.7% | -1.2% | +30.7% |
| AMPH | SELL | 2023-04-10 | 2023-04-12 | $40.00 | $200K | +3.6% | +5.4% | +39.4% |
| AMPH | SELL | 2022-08-08 | 2022-08-10 | $38.38 | $309K | +3.2% | -12.0% | -14.8% |
| AMPH | SELL | 2022-07-15 | 2022-07-18 | $36.64 | $794K | +0.8% | -13.3% | -20.7% |
| AMPH | SELL | 2021-08-02 | 2021-08-03 | $21.14 | $378K | -8.2% | -8.5% | -11.5% |
| AMPH | SELL | 2021-07-15 | 2021-07-16 | $20.01 | $1.3M | +5.2% | -2.7% | -3.2% |
| AMPH | SELL | 2021-05-14 | 2021-05-18 | $19.97 | $512K | -3.3% | +4.2% | -1.2% |
| AMPH | SELL | 2021-05-11 | 2021-05-13 | $19.19 | $368K | -1.0% | +0.5% | +1.7% |
| AMPH | SELL | 2020-07-20 | 2020-07-22 | $21.14 | $430K | +0.6% | -2.9% | +0.0% |
| AMPH | SELL | 2020-06-09 | 2020-06-10 | $20.41 | $955K | +9.0% | +3.9% | +1.2% |
| AMPH | SELL | 2019-09-13 | 2019-09-17 | $21.45 | $64K | -7.0% | -5.7% | -11.1% |
| AMPH | SELL | 2019-09-05 | 2019-09-09 | $21.74 | $137K | -1.2% | -7.3% | -9.8% |
| AMPH | SELL | 2019-08-12 | 2019-08-14 | $20.50 | $534K | +7.5% | +2.8% | -15.8% |
| AMPH | SELL | 2019-02-12 | 2019-02-14 | $23.86 | $212K | +2.7% | -14.6% | -11.1% |
| AMPH | SELL | 2019-02-05 | 2019-02-06 | $23.18 | $528K | +6.2% | +4.0% | -2.7% |
| AMPH | SELL | 2019-01-22 | 2019-01-24 | $22.52 | $158K | +4.6% | +7.9% | -6.0% |
| AMPH | SELL | 2019-01-14 | 2019-01-16 | $22.15 | $141K | +1.7% | +12.3% | -5.2% |
| AMPH | SELL | 2018-11-30 | 2018-12-03 | $21.49 | $354K | -9.2% | -11.7% | +10.5% |
| AMPH | SELL | 2018-11-28 | 2018-11-29 | $20.49 | $31K | +0.9% | -4.9% | +17.1% |
| AMPH | SELL | 2018-11-23 | 2018-11-26 | $20.26 | $26K | +12.7% | +1.6% | +22.5% |
| AMPH | SELL | 2018-11-08 | 2018-11-13 | $21.07 | $624K | -7.5% | -1.4% | +10.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.