Mark E. Tryniski is CEO & President at COMMUNITY BANK SYSTEM, INC. (CBU). They have made 15 open-market trades across 3 companies since 2006, most recently 2026-05-27.
CIK 0001242753
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.
8 open-market purchases totalling $1.2M since 2006, against 7 sales. Across 8 scored buys the stock is up 3.7% at ninety days, and 1.6 points ahead of the S&P over the same stretch.
8 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| CBU | 41,101 | $2.5M |
| TBBK | 22,566 | $1.1M |
| CNMD | 9,108 | $425K |
| Total | $4.0M |
Shares reported on the most recent Form 4, priced at the 2026-05-28 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 25% | 25% | 38% |
| Avg Move | -2.8% | +0.6% | +3.7% |
| Alpha | +0.3% | +0.0% | +1.6% |
| Scored | 8 | 8 | 8 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| TBBK | BUY | 2026-02-04 | 2026-02-05 | $60.23 | $301K | -4.4% | -12.1% | +0.4% |
| TBBK | BUY | 2024-10-29 | 2024-10-30 | $50.36 | $252K | +15.4% | +15.6% | +10.0% |
| CNMD | SELL | 2021-11-05 | 2021-11-08 | $156.50 | $3.9M | -8.5% | -7.3% | -12.6% |
| CNMD | SELL | 2021-02-19 | 2021-02-23 | $122.23 | $427K | -1.2% | +0.3% | +10.5% |
| CNMD | SELL | 2021-02-16 | 2021-02-18 | $121.11 | $1.2M | +1.7% | +4.2% | +16.3% |
| CBU | SELL | 2019-12-24 | 2019-12-26 | $70.35 | $963K | -0.2% | -3.7% | -24.0% |
| CBU | SELL | 2019-12-23 | 2019-12-26 | $70.42 | $2.6M | -0.2% | -3.7% | -24.0% |
| CBU | SELL | 2019-02-07 | 2019-02-08 | $62.10 | $1.4M | +4.0% | -0.1% | +6.5% |
| CNMD | BUY | 2017-03-06 | 2017-03-07 | $41.15 | $206K | +5.0% | +8.5% | +26.0% |
| CBU | SELL | 2012-03-27 | 2012-03-29 | $29.10 | $329K | -7.5% | -1.2% | -1.2% |
| CBU | BUY | 2011-08-19 | 2011-08-22 | $22.07 | $82K | -7.5% | -1.2% | -1.2% |
| CBU | BUY | 2009-03-09 | 2009-03-10 | $14.10 | $71K | -7.5% | -1.2% | -1.2% |
| CNMD | BUY | 2009-03-06 | 2009-03-06 | $11.74 | $23K | -8.3% | -2.4% | -2.4% |
| CBU | BUY | 2009-01-28 | 2009-01-30 | $19.33 | $97K | -7.5% | -1.2% | -1.2% |
| CBU | BUY | 2006-03-03 | 2006-03-03 | $21.86 | $219K | -7.5% | -1.2% | -1.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.