Mary Beth Dooley is See Remarks below at SYNLOGIC, INC. (SYBX). They have made 5 open-market trades across 1 company since 2024, most recently 2025-10-29.
CIK 0002015112
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 5 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| SYBX | 12,744 | $7K |
Shares reported on the most recent Form 4, priced at the 2025-10-31 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SYBX | SELL | 2025-10-29 | 2025-10-31 | $1.81 | $284 | -5.1% | -20.3% | -68.4% |
| SYBX | SELL | 2025-04-02 | 2025-04-03 | $1.20 | $173 | -1.6% | +6.6% | +9.3% |
| SYBX | SELL | 2025-02-03 | 2025-02-04 | $1.33 | $3K | +5.0% | -1.7% | -12.2% |
| SYBX | SELL | 2024-10-29 | 2024-10-30 | $1.40 | $111 | +0.7% | +0.4% | +0.0% |
| SYBX | SELL | 2024-04-02 | 2024-04-04 | $1.73 | $325 | +0.6% | +2.8% | -18.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.