J. Michael Dodson is President & CFO +1 at QUANTUM CORP /DE/ (QMCO). They have made 17 open-market trades across 3 companies since 2011, most recently 2026-08-17.
CIK 0001231559
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.
3 open-market purchases totalling $616K since 2011, against 14 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| QMCO | 870,372 | $16.1M |
| ATEN | 37,245 | $912K |
| IMMR | 34,233 | $238K |
| WATT | 5,514 | $47K |
| SIGM | 98,844 | $23K |
| MTSN | 95,574 | — |
| DDIC | 5,833 | — |
| Total | $17.3M |
Shares reported on the most recent Form 4, priced at the 2026-08-18 close. 2 holdings could not be priced and are excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| IMMR | SELL | 2026-06-12 | 2026-06-16 | $6.54 | $32K | +3.8% | -0.2% | +9.7% |
| IMMR | SELL | 2025-06-12 | 2025-06-16 | $7.53 | $45K | -2.0% | -0.8% | -9.8% |
| IMMR | SELL | 2024-06-13 | 2024-06-14 | $10.68 | $106K | -10.4% | +8.8% | -15.7% |
| QMCO | SELL | 2022-10-05 | 2022-10-07 | $1.26 | $14K | -1.7% | +16.1% | +0.8% |
| QMCO | SELL | 2022-09-09 | 2022-09-12 | $1.57 | $109K | -20.7% | -34.3% | -38.5% |
| QMCO | SELL | 2022-07-08 | 2022-07-12 | $1.46 | $48K | +33.1% | +30.9% | -16.5% |
| QMCO | SELL | 2022-01-07 | 2022-01-10 | $5.37 | $200K | -11.4% | -7.6% | -58.0% |
| QMCO | SELL | 2021-09-10 | 2021-09-13 | $5.47 | $431K | -0.9% | -1.9% | +0.0% |
| QMCO | SELL | 2021-07-07 | 2021-07-08 | $6.81 | $481K | -6.6% | -3.2% | -21.6% |
| QMCO | SELL | 2021-06-11 | 2021-06-14 | $7.25 | $273K | -11.2% | -19.3% | -31.4% |
| QMCO | SELL | 2021-06-04 | 2021-06-07 | $7.15 | $282K | +8.6% | -6.8% | -20.4% |
| QMCO | SELL | 2020-12-30 | 2020-12-30 | $5.63 | $383K | +20.6% | +23.4% | +38.1% |
| QMCO | SELL | 2020-08-31 | 2020-09-02 | $5.58 | $147K | -4.1% | -22.0% | -1.4% |
| QMCO | SELL | 2020-08-24 | 2020-08-26 | $5.38 | $132K | -11.4% | -22.5% | +4.8% |
| QMCO | BUY | 2019-08-09 | 2019-08-13 | $5.09 | $509K | -12.7% | -8.5% | -8.5% |
| MTSN | BUY | 2014-05-01 | 2014-05-05 | $1.93 | $39K | N/A | N/A | N/A |
| MTSN | BUY | 2011-11-08 | 2011-11-08 | $1.37 | $69K | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.