Martin A. Dietrich is Director at NBT BANCORP INC (NBTB). They have made 25 open-market trades across 1 company since 2006, most recently 2026-05-19.
CIK 0001204704
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.
1 open-market purchase totalling $45K since 2007, against 24 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| NBTB | 112,294 | $6.1M |
Shares reported on the most recent Form 4, priced at the 2026-05-21 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| NBTB | SELL | 2022-08-16 | 2022-08-17 | $42.50 | $865K | -7.1% | -6.4% | +13.1% |
| NBTB | SELL | 2022-01-14 | 2022-01-18 | $42.00 | $417K | -7.5% | -7.1% | -15.8% |
| NBTB | SELL | 2017-02-22 | 2017-02-24 | $41.74 | $626K | -3.9% | -10.2% | -12.0% |
| NBTB | SELL | 2017-02-10 | 2017-02-14 | $39.96 | $1.9M | +0.2% | -1.6% | -8.6% |
| NBTB | SELL | 2017-02-06 | 2017-02-08 | $40.31 | $143K | +5.8% | +0.4% | -2.8% |
| NBTB | SELL | 2017-02-03 | 2017-02-06 | $40.40 | $829K | +3.3% | -1.1% | -3.8% |
| NBTB | SELL | 2017-02-02 | 2017-02-03 | $39.73 | $1.1M | +3.1% | +1.2% | -3.6% |
| NBTB | SELL | 2017-01-25 | 2017-01-26 | $41.45 | $2.0M | -4.6% | -1.3% | -3.4% |
| NBTB | SELL | 2016-11-14 | 2016-11-15 | $40.20 | $1.7M | +0.4% | +6.9% | +5.0% |
| NBTB | SELL | 2016-09-22 | 2016-09-23 | $32.67 | $817K | +2.6% | +4.3% | +29.1% |
| NBTB | SELL | 2016-07-27 | 2016-07-28 | $29.78 | $745K | +3.5% | +7.3% | +11.7% |
| NBTB | SELL | 2016-07-27 | 2016-07-28 | $29.78 | $744K | +3.5% | +7.3% | +11.7% |
| NBTB | SELL | 2015-09-25 | 2015-09-28 | $26.99 | $405K | -8.3% | -1.5% | -1.5% |
| NBTB | SELL | 2015-06-29 | 2015-06-30 | $26.32 | $170K | -8.3% | -1.5% | -1.5% |
| NBTB | SELL | 2015-05-28 | 2015-06-01 | $24.77 | $323K | -8.3% | -1.5% | -1.5% |
| NBTB | SELL | 2015-01-16 | 2015-01-20 | $24.03 | $84K | -8.3% | -1.5% | -1.5% |
| NBTB | SELL | 2014-01-16 | 2014-01-17 | $25.06 | $135K | -8.3% | -1.5% | -1.5% |
| NBTB | SELL | 2014-01-06 | 2014-01-06 | $25.37 | $115K | -8.3% | -1.5% | -1.5% |
| NBTB | SELL | 2013-07-25 | 2013-07-26 | $23.11 | $581K | -8.3% | -1.5% | -1.5% |
| NBTB | SELL | 2012-02-01 | 2012-02-02 | $22.86 | $716K | -8.3% | -1.5% | -1.5% |
| NBTB | SELL · 10b5-1 | 2011-02-09 | 2011-02-09 | $24.40 | $62K | -8.3% | -1.5% | -1.5% |
| NBTB | SELL | 2009-05-08 | 2009-05-11 | $24.99 | $144K | -8.3% | -1.5% | -1.5% |
| NBTB | SELL | 2008-11-03 | 2008-11-05 | $27.67 | $172K | -8.3% | -1.5% | -1.5% |
| NBTB | SELL | 2008-08-08 | 2008-08-12 | $25.79 | $513K | -8.3% | -1.5% | -1.5% |
| NBTB | BUY | 2007-07-26 | 2007-07-30 | $18.57 | $45K | -8.3% | -1.5% | -1.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.