Mark A. Velleca is Director at G1 Therapeutics, Inc. (GTHX). They have made 21 open-market trades across 1 company since 2017, most recently 2025-01-30.
CIK 0001706847
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 | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| GTHX | SELL · 10b5-1 | 2023-08-08 | 2023-08-10 | $2.00 | $120K | -11.9% | -15.9% | -27.4% |
| GTHX | SELL | 2022-10-18 | 2022-10-20 | $11.70 | $176K | +3.4% | -40.6% | -39.4% |
| GTHX | SELL | 2022-09-20 | 2022-09-22 | $13.50 | $270K | +3.1% | -11.4% | -51.6% |
| GTHX | SELL | 2022-08-16 | 2022-08-18 | $12.64 | $1.0M | +12.5% | +13.3% | -32.4% |
| GTHX | SELL | 2021-07-13 | 2021-07-15 | $18.92 | $946K | -8.5% | -26.5% | -34.0% |
| GTHX | SELL | 2021-06-15 | 2021-06-17 | $21.91 | $876K | +3.5% | -18.4% | -36.2% |
| GTHX | SELL | 2021-05-11 | 2021-05-13 | $19.90 | $597K | +0.2% | +9.8% | -27.4% |
| GTHX | SELL | 2021-04-13 | 2021-04-15 | $24.46 | $734K | -9.2% | -14.4% | -23.9% |
| GTHX | SELL | 2021-02-16 | 2021-02-18 | $30.88 | $1.2M | -10.0% | -11.1% | -20.4% |
| GTHX | SELL | 2021-01-19 | 2021-01-21 | $21.14 | $845K | +32.1% | +23.6% | +8.0% |
| GTHX | SELL | 2020-12-15 | 2020-12-17 | $19.53 | $586K | -8.4% | +7.6% | +13.2% |
| GTHX | SELL | 2018-11-15 | 2018-11-16 | $39.84 | $398K | -4.8% | -31.7% | -49.4% |
| GTHX | SELL | 2018-10-15 | 2018-10-15 | $41.53 | $415K | -7.6% | -2.4% | -53.0% |
| GTHX | SELL | 2018-09-17 | 2018-09-19 | $66.26 | $643K | -13.0% | -20.6% | -51.7% |
| GTHX | SELL | 2018-08-15 | 2018-08-17 | $55.88 | $559K | +2.1% | +14.9% | -27.6% |
| GTHX | SELL | 2018-07-16 | 2018-07-17 | $42.06 | $210K | +8.6% | +27.2% | -9.2% |
| GTHX | SELL | 2018-05-15 | 2018-05-16 | $46.27 | $347K | +0.0% | -4.9% | +16.0% |
| GTHX | SELL | 2018-04-16 | 2018-04-17 | $35.98 | $522K | -1.3% | +19.3% | +10.3% |
| GTHX | SELL | 2018-03-15 | 2018-03-16 | $38.20 | $287K | -1.9% | -0.7% | +22.7% |
| GTHX | SELL | 2018-02-15 | 2018-02-16 | $20.00 | $150K | +22.0% | +91.9% | +146.9% |
| GTHX | SELL | 2018-01-16 | 2018-01-17 | $22.99 | $172K | +6.6% | -17.6% | +70.1% |
| GTHX | SELL | 2017-12-18 | 2017-12-20 | $20.01 | $150K | +4.3% | +34.7% | +106.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.