Michael Bigham is Chairman at Paratek Pharmaceuticals, Inc. (PRTK). They have made 17 open-market trades across 2 companies since 2013, most recently 2023-09-21.
CIK 0001216917
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.
2 open-market purchases totalling $458K since 2013, against 15 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| PRTK | SELL · 10b5-1 | 2023-08-09 | 2023-08-10 | $2.20 | $69K | -0.5% | +0.9% | N/A |
| PRTK | SELL · 10b5-1 | 2022-12-21 | 2022-12-22 | $1.99 | $31K | +19.8% | +20.9% | -0.8% |
| PRTK | SELL | 2022-12-12 | 2022-12-14 | $1.96 | $164K | -11.6% | +26.3% | +2.6% |
| PRTK | SELL · 10b5-1 | 2022-10-28 | 2022-11-01 | $3.47 | $21K | -34.5% | -36.5% | -40.5% |
| PRTK | SELL | 2022-08-09 | 2022-08-10 | $2.66 | $152K | -11.6% | -14.3% | -28.3% |
| PRTK | SELL | 2021-12-13 | 2021-12-15 | $4.30 | $212K | -1.4% | +2.1% | -28.8% |
| PRTK | SELL | 2021-08-17 | 2021-08-18 | $5.12 | $328K | +7.6% | -6.8% | -1.6% |
| PRTK | SELL | 2021-06-04 | 2021-06-08 | $9.70 | $667K | -27.5% | -34.6% | -48.0% |
| PRTK | SELL | 2020-12-11 | 2020-12-15 | $6.81 | $605K | -9.5% | -3.2% | +13.8% |
| PRTK | SELL | 2020-11-13 | 2020-11-16 | $5.93 | $311K | +0.5% | +8.9% | +32.4% |
| PRTK | SELL | 2020-05-12 | 2020-05-14 | $4.68 | $57K | +3.8% | +7.3% | +1.4% |
| PRTK | SELL | 2018-12-12 | 2018-12-14 | $6.76 | $57K | -11.9% | +5.3% | +7.8% |
| PRTK | SELL | 2018-10-15 | 2018-10-16 | $8.96 | $113K | -18.1% | -23.2% | -34.1% |
| PRTK | SELL | 2018-10-03 | 2018-10-04 | $9.82 | $320K | -17.9% | -40.7% | -52.6% |
| PRTK | SELL | 2018-07-02 | 2018-07-05 | $9.97 | $224K | -1.9% | +2.8% | -5.7% |
| PRTK | SELL | 2018-04-09 | 2018-04-10 | $12.70 | $110K | -15.1% | -15.4% | -20.1% |
| PRTK | SELL | 2018-02-05 | 2018-02-07 | $14.22 | $57K | -1.1% | +4.7% | -19.3% |
| PRTK | SELL | 2017-07-05 | 2017-07-06 | $23.58 | $239K | +2.3% | -8.1% | +7.5% |
| PRTK | SELL · 10b5-1 | 2017-02-06 | 2017-02-08 | $15.09 | $75K | +1.0% | +7.9% | +47.9% |
| PRTK | BUY | 2016-06-23 | 2016-06-27 | $13.45 | $269K | +1.5% | -0.7% | +2.4% |
| SUPN | BUY | 2013-03-20 | 2013-03-26 | $5.41 | $189K | -17.4% | -0.2% | -0.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.