Donald A. McCunniff is VP at MARTIN MARIETTA MATERIALS INC (MLM). They have made 8 open-market trades across 1 company since 2016, most recently 2026-03-01.
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.
0 open-market purchases, against 8 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MLM | 7,518 | $3.8M |
Shares reported on the most recent Form 4, priced at the 2026-03-03 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MLM | SELL | 2025-03-05 | 2025-03-06 | $475.00 | $633K | +3.2% | -2.8% | +16.1% |
| MLM | SELL | 2019-05-06 | 2019-05-07 | $220.19 | $1.4M | -1.0% | +4.4% | +11.9% |
| MLM | SELL | 2019-02-27 | 2019-02-28 | $189.59 | $718K | +4.0% | +8.2% | +11.6% |
| MLM | SELL | 2018-11-09 | 2018-11-13 | $185.50 | $274K | +2.9% | -5.8% | -0.2% |
| MLM | SELL | 2018-08-22 | 2018-08-24 | $204.33 | $919K | -4.2% | -7.8% | -9.8% |
| MLM | SELL | 2018-06-13 | 2018-06-13 | $230.72 | $2.0M | -2.5% | -1.7% | -16.6% |
| MLM | SELL | 2017-05-04 | 2017-05-04 | $240.17 | $668K | -2.3% | -4.5% | -9.3% |
| MLM | SELL | 2016-12-09 | 2016-12-12 | $228.98 | $688K | -0.3% | -1.3% | -4.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.