Jon Kevin Griffin is Director at Main Street Capital CORP (MAIN). They have made 56 open-market trades across 1 company since 2011, most recently 2026-05-04.
CIK 0001525628
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.
56 open-market purchases totalling $138K since 2011, never a sale. Across 56 scored buys the stock is up 2.4% at ninety days, and 1.6 points ahead of the S&P over the same stretch.
56 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| MAIN | 73,505 | $4.2M |
Shares reported on the most recent Form 4, priced at the 2026-05-06 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 14% | 93% | 96% |
| Avg Move | -1.6% | +1.3% | +2.4% |
| Alpha | +3.0% | +1.0% | +1.6% |
| Scored | 56 | 56 | 56 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MAIN | BUY | 2016-09-15 | 2016-09-23 | $34.18 | $4K | +0.9% | -0.3% | +9.2% |
| MAIN | BUY | 2016-08-15 | 2016-08-22 | $34.67 | $4K | +0.1% | +0.1% | +5.5% |
| MAIN | BUY | 2016-07-15 | 2016-07-22 | $33.17 | $3K | +2.2% | +2.8% | +0.4% |
| MAIN | BUY | 2016-06-27 | 2016-07-05 | $32.37 | $5K | +1.0% | +3.6% | +4.9% |
| MAIN | BUY | 2016-06-15 | 2016-06-22 | $32.71 | $3K | +0.1% | +1.3% | +4.3% |
| MAIN | BUY | 2016-05-16 | 2016-05-23 | $32.33 | $3K | +3.9% | +3.5% | +8.3% |
| MAIN | BUY | 2016-04-15 | 2016-04-25 | $31.78 | $3K | -2.8% | +0.8% | +4.5% |
| MAIN | BUY | 2016-03-15 | 2016-03-22 | $30.89 | $3K | -1.2% | -0.3% | +4.1% |
| MAIN | BUY | 2016-02-17 | 2016-03-01 | $28.48 | $3K | +4.1% | +6.4% | +9.1% |
| MAIN | BUY | 2016-01-15 | 2016-01-25 | $27.45 | $3K | +1.0% | +0.6% | +14.0% |
| MAIN | BUY | 2015-12-24 | 2016-01-04 | $30.33 | $4K | -6.4% | -5.0% | +5.7% |
| MAIN | BUY | 2015-12-14 | 2015-12-22 | $30.38 | $3K | -2.1% | -6.8% | +8.5% |
| MAIN | BUY | 2015-11-16 | 2015-11-24 | $30.90 | $3K | -2.1% | +1.5% | -2.7% |
| MAIN | BUY | 2015-10-15 | 2015-10-26 | $28.42 | $3K | -2.1% | +1.5% | -3.9% |
| MAIN | BUY | 2015-09-30 | 2015-09-30 | $26.77 | $27K | -2.1% | +1.5% | +1.5% |
| MAIN | BUY | 2015-09-15 | 2015-09-22 | $28.68 | $3K | -2.1% | +1.5% | +1.5% |
| MAIN | BUY | 2015-08-14 | 2015-08-24 | $29.83 | $3K | -2.1% | +1.5% | +1.5% |
| MAIN | BUY | 2015-07-15 | 2015-07-23 | $33.14 | $3K | -2.1% | +1.5% | +1.5% |
| MAIN | BUY | 2015-06-25 | 2015-07-06 | $32.59 | $4K | -2.1% | +1.5% | +1.5% |
| MAIN | BUY | 2015-06-15 | 2015-06-24 | $31.85 | $3K | -2.1% | +1.5% | +1.5% |
| MAIN | BUY | 2015-05-15 | 2015-05-26 | $31.46 | $2K | -2.1% | +1.5% | +1.5% |
| MAIN | BUY | 2015-04-15 | 2015-04-23 | $31.81 | $2K | -2.1% | +1.5% | +1.5% |
| MAIN | BUY | 2015-03-16 | 2015-03-24 | $31.25 | $2K | -2.1% | +1.5% | +1.5% |
| MAIN | BUY | 2015-02-13 | 2015-03-02 | $31.08 | $2K | -2.1% | +1.5% | +1.5% |
| MAIN | BUY | 2015-01-15 | 2015-01-26 | $28.93 | $2K | -2.1% | +1.5% | +1.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.