Christopher M. Miller is CFO & VP at Core-Mark Holding Company, LLC (CORE). They have made 42 open-market trades across 2 companies since 2008, most recently 2026-03-12.
CIK 0001219175
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 $117K since 2025, against 41 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CORE | 47,677 | $2.2M |
| GO | 87,697 | $1.1M |
| Total | $3.3M |
Shares reported on the most recent Form 4, priced at the 2026-03-16 close.
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 |
|---|---|---|---|---|---|---|---|---|
| GO | SELL | 2026-03-09 | 2026-03-10 | $5.84 | $29K | -7.1% | +12.7% | +42.4% |
| GO | BUY | 2025-02-27 | 2025-02-27 | $11.68 | $117K | +4.5% | +13.4% | +11.5% |
| CORE | SELL | 2021-01-07 | 2021-01-07 | $32.73 | $153K | +3.0% | -3.7% | +22.2% |
| CORE | SELL | 2020-01-07 | 2020-01-07 | $26.22 | $180K | +0.0% | -6.6% | +9.5% |
| CORE | SELL | 2019-03-06 | 2019-03-19 | $37.57 | $94K | +2.5% | +0.4% | +4.4% |
| CORE | SELL | 2019-01-04 | 2019-03-08 | $24.74 | $133K | -7.0% | -2.1% | +1.5% |
| CORE | SELL | 2017-01-06 | 2017-01-11 | $42.96 | $302K | -5.6% | -22.0% | -26.0% |
| CORE | SELL | 2016-01-07 | 2016-01-08 | $77.10 | $267K | +0.3% | +2.0% | +3.8% |
| CORE | SELL | 2016-01-07 | 2016-01-08 | $77.10 | $267K | +0.3% | +2.0% | +3.8% |
| CORE | SELL | 2015-03-17 | 2015-03-19 | $63.48 | $63K | -7.3% | -2.7% | -2.7% |
| CORE | SELL | 2014-12-31 | 2015-01-05 | $61.90 | $222K | -7.3% | -2.7% | -2.7% |
| CORE | SELL · 10b5-1 | 2014-09-30 | 2014-10-02 | $53.40 | $31K | -7.3% | -2.7% | -2.7% |
| CORE | SELL | 2014-06-19 | 2014-06-23 | $90.90 | $91K | -7.3% | -2.7% | -2.7% |
| CORE | SELL · 10b5-1 | 2013-12-31 | 2014-01-03 | $75.05 | $41K | -7.3% | -2.7% | -2.7% |
| CORE | SELL | 2013-11-19 | 2013-11-21 | $74.25 | $32K | -7.3% | -2.7% | -2.7% |
| CORE | SELL · 10b5-1 | 2013-09-30 | 2013-10-03 | $65.72 | $36K | -7.3% | -2.7% | -2.7% |
| CORE | SELL · 10b5-1 | 2013-07-01 | 2013-07-03 | $63.24 | $34K | -7.3% | -2.7% | -2.7% |
| CORE | SELL | 2013-05-10 | 2013-05-13 | $56.10 | $119K | -7.3% | -2.7% | -2.7% |
| CORE | SELL · 10b5-1 | 2013-04-01 | 2013-04-03 | $50.56 | $27K | -7.3% | -2.7% | -2.7% |
| CORE | SELL · 10b5-1 | 2013-01-18 | 2013-01-23 | $51.46 | $60K | -7.3% | -2.7% | -2.7% |
| CORE | SELL · 10b5-1 | 2012-12-31 | 2013-01-03 | $46.00 | $25K | -7.3% | -2.7% | -2.7% |
| CORE | SELL | 2012-11-20 | 2012-11-21 | $42.43 | $11K | -7.3% | -2.7% | -2.7% |
| CORE | SELL · 10b5-1 | 2012-10-01 | 2012-10-03 | $47.91 | $26K | -7.3% | -2.7% | -2.7% |
| CORE | SELL | 2012-08-16 | 2012-08-20 | $47.62 | $75K | -7.3% | -2.7% | -2.7% |
| CORE | SELL · 10b5-1 | 2012-06-30 | 2012-07-05 | $47.73 | $26K | -7.3% | -2.7% | -2.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.