Mark R. Ziebell is CLO at Avid Bioservices, Inc. (CDMO). They have made 18 open-market trades across 1 company since 2016, most recently 2025-02-05.
CIK 0001552642
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 since 2016, against 18 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CDMO | SELL | 2024-04-30 | 2024-05-02 | $7.40 | $12K | +10.7% | -4.1% | +25.6% |
| CDMO | SELL | 2024-01-10 | 2024-01-11 | $6.17 | $8K | -2.5% | +9.2% | +1.9% |
| CDMO | SELL | 2023-10-10 | 2023-10-11 | $9.20 | $10K | -22.7% | -44.6% | -31.6% |
| CDMO | SELL | 2023-07-11 | 2023-07-12 | $13.86 | $139K | -0.6% | -4.0% | -29.1% |
| CDMO | SELL | 2023-07-10 | 2023-07-11 | $13.77 | $9K | +2.2% | -5.7% | -30.7% |
| CDMO | SELL | 2023-06-29 | 2023-06-30 | $12.98 | $47K | -2.6% | -7.8% | -29.2% |
| CDMO | SELL · 10b5-1 | 2023-05-01 | 2023-05-02 | $17.91 | $448K | -1.9% | -11.8% | -28.4% |
| CDMO | SELL | 2023-04-10 | 2023-04-11 | $19.80 | $15K | -3.9% | -14.5% | -31.9% |
| CDMO | SELL | 2023-01-10 | 2023-01-11 | $14.44 | $17K | +9.4% | +6.3% | +30.5% |
| CDMO | SELL | 2022-04-11 | 2022-04-12 | $18.56 | $7K | -8.8% | -34.5% | -3.5% |
| CDMO | SELL | 2022-03-18 | 2022-03-22 | $22.03 | $211K | -1.5% | -20.9% | -33.9% |
| CDMO | SELL | 2022-02-10 | 2022-02-11 | $22.14 | $285K | -4.1% | -10.6% | -43.2% |
| CDMO | SELL | 2022-01-10 | 2022-01-11 | $21.58 | $8K | -19.2% | -5.2% | -18.4% |
| CDMO | SELL | 2022-01-03 | 2022-01-05 | $27.65 | $1.1M | -16.2% | -16.2% | -15.4% |
| CDMO | SELL | 2021-12-27 | 2021-12-29 | $30.27 | $413K | -26.0% | -42.4% | -26.8% |
| CDMO | SELL | 2021-12-15 | 2021-12-16 | $24.57 | $316K | +22.7% | -21.6% | -17.9% |
| CDMO | SELL | 2021-10-11 | 2021-10-12 | $22.37 | $8K | +11.9% | +43.8% | -3.6% |
| CDMO | SELL | 2021-07-12 | 2021-07-13 | $25.61 | $320K | +1.4% | -3.2% | -10.8% |
| CDMO | SELL | 2020-07-13 | 2020-07-14 | $6.88 | $25K | -5.8% | +15.3% | +7.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.