Kenneth J. Mahon is Director at Dime Community Bancshares, Inc. /NY/ (DCOM). They have made 31 open-market trades across 1 company since 2007, most recently 2026-01-01.
CIK 0001237108
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.
9 open-market purchases totalling $127K since 2007, against 22 sales. Across 9 scored buys the stock is up 16.2% at ninety days, and 12.6 points ahead of the S&P over the same stretch.
9 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| DCOM | 234,365 | $9.1M |
Shares reported on the most recent Form 4, priced at the 2026-01-05 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 33% | 44% | 78% |
| Avg Move | -1.9% | -2.5% | +16.2% |
| Alpha | -1.3% | -1.8% | +12.6% |
| Scored | 9 | 9 | 9 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| DCOM | SELL | 2025-02-11 | 2025-02-12 | $32.69 | $817K | -1.1% | -9.7% | -11.3% |
| DCOM | BUY | 2023-05-31 | 2023-06-01 | $16.24 | $5K | +13.8% | +8.1% | +28.9% |
| DCOM | BUY | 2023-05-25 | 2023-05-30 | $17.18 | $6K | +10.9% | +7.0% | +27.2% |
| DCOM | BUY | 2023-05-18 | 2023-05-19 | $17.35 | $4K | -6.1% | +2.8% | +27.6% |
| DCOM | BUY | 2023-05-17 | 2023-05-18 | $16.64 | $2K | -8.7% | +1.4% | +22.5% |
| DCOM | SELL | 2022-08-15 | 2022-08-16 | $35.06 | $1.1M | -7.2% | -10.5% | +0.0% |
| DCOM | SELL | 2022-08-12 | 2022-08-15 | $34.60 | $865K | -5.7% | -12.6% | -0.6% |
| DCOM | SELL | 2022-08-11 | 2022-08-12 | $34.41 | $1.4M | -5.5% | -9.0% | +0.7% |
| DCOM | BUY | 2018-11-26 | 2018-12-03 | $17.58 | $13K | -6.5% | -9.0% | +14.1% |
| DCOM | BUY | 2018-11-20 | 2018-11-21 | $16.91 | $5K | -6.1% | -15.1% | +14.6% |
| DCOM | BUY | 2018-11-16 | 2018-11-19 | $16.72 | $5K | +0.5% | -14.1% | +14.0% |
| DCOM | SELL | 2018-05-01 | 2018-05-03 | $19.27 | $248K | +7.2% | +9.4% | +5.0% |
| DCOM | SELL | 2017-05-01 | 2017-05-02 | $19.34 | $299K | -3.3% | -5.7% | -9.7% |
| DCOM | SELL | 2015-05-28 | 2015-05-29 | $16.45 | $814K | -7.4% | -1.6% | -1.6% |
| DCOM | SELL | 2014-05-02 | 2014-05-02 | $15.98 | $132K | -7.4% | -1.6% | -1.6% |
| DCOM | SELL | 2013-08-05 | 2013-08-07 | $17.74 | $125K | -7.4% | -1.6% | -1.6% |
| DCOM | SELL | 2013-08-01 | 2013-08-05 | $17.68 | $870K | -7.4% | -1.6% | -1.6% |
| DCOM | SELL | 2013-07-30 | 2013-08-01 | $17.59 | $1.2M | -7.4% | -1.6% | -1.6% |
| DCOM | SELL | 2013-05-01 | 2013-05-02 | $14.03 | $150K | -7.4% | -1.6% | -1.6% |
| DCOM | SELL | 2013-01-22 | 2013-01-24 | $14.18 | $436K | -7.4% | -1.6% | -1.6% |
| DCOM | SELL | 2012-11-06 | 2012-11-08 | $14.45 | $202K | -7.4% | -1.6% | -1.6% |
| DCOM | SELL | 2012-07-31 | 2012-08-02 | $14.50 | $435K | -7.4% | -1.6% | -1.6% |
| DCOM | SELL | 2012-05-07 | 2012-05-09 | $13.16 | $144K | -7.4% | -1.6% | -1.6% |
| DCOM | SELL | 2012-02-16 | 2012-02-17 | $14.31 | $300K | -7.4% | -1.6% | -1.6% |
| DCOM | SELL | 2011-02-24 | 2011-02-28 | $15.15 | $297K | -7.4% | -1.6% | -1.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.