Mark M. Gambill is Director at SPEEDWAY MOTORSPORTS LLC (TRK). They have made 10 open-market trades across 3 companies since 2006, most recently 2026-07-01.
CIK 0001170913
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 $338K since 2009, against 7 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| TRK | SELL | 2017-11-09 | 2017-11-13 | $20.00 | $240K | -4.9% | +2.1% | +0.1% |
| NEU | BUY | 2013-01-30 | 2013-01-31 | $256.07 | $128K | -5.3% | -1.1% | -1.1% |
| TCAP | BUY | 2012-05-11 | 2012-05-14 | $20.00 | $100K | -9.5% | +2.9% | +2.9% |
| NEU | SELL | 2009-05-28 | 2010-08-11 | $68.97 | $31K | -5.3% | -1.1% | -1.1% |
| TRK | BUY | 2009-03-18 | 2009-03-25 | $11.03 | $110K | -10.7% | -4.6% | -4.6% |
| TRK | SELL | 2007-05-18 | 2007-05-22 | $39.12 | $606K | -10.7% | -4.6% | -4.6% |
| TRK | SELL | 2007-05-18 | 2007-05-22 | $39.31 | $177K | -10.7% | -4.6% | -4.6% |
| TRK | SELL | 2006-11-22 | 2006-11-22 | $38.67 | $429K | -10.7% | -4.6% | -4.6% |
| TRK | SELL | 2006-11-21 | 2006-11-22 | $38.94 | $347K | -10.7% | -4.6% | -4.6% |
| TRK | SELL | 2006-05-22 | 2006-05-24 | $38.10 | $762K | -10.7% | -4.6% | -4.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.