Dana F. Guzzo is CAO & VP +1 at MARTIN MARIETTA MATERIALS INC (MLM). They have made 10 open-market trades across 1 company since 2013, most recently 2026-09-01.
CIK 0000916076
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 10 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MLM | 24,321 | $12.2M |
Shares reported on the most recent Form 4, priced at the 2026-09-02 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MLM | SELL | 2017-05-04 | 2017-05-05 | $239.24 | $397K | -5.1% | -3.9% | -11.0% |
| MLM | SELL | 2016-11-10 | 2016-11-10 | $228.69 | $345K | -5.6% | -4.6% | -3.5% |
| MLM | SELL | 2016-11-09 | 2016-11-10 | $227.18 | $1.1M | -5.6% | -4.6% | -3.5% |
| MLM | SELL | 2016-11-09 | 2016-11-10 | $224.59 | $198K | -5.6% | -4.6% | -3.5% |
| MLM | SELL | 2016-05-24 | 2016-05-25 | $189.20 | $40K | -3.0% | -2.6% | +1.2% |
| MLM | SELL | 2016-05-11 | 2016-05-12 | $187.64 | $330K | +2.2% | -1.9% | +7.4% |
| MLM | SELL | 2015-05-22 | 2015-05-27 | $154.13 | $163K | -9.0% | +0.6% | +0.6% |
| MLM | SELL | 2014-02-07 | 2014-02-07 | $111.54 | $108K | -9.0% | +0.6% | +0.6% |
| MLM | SELL | 2013-03-06 | 2013-03-07 | $102.06 | $82K | -9.0% | +0.6% | +0.6% |
| MLM | SELL | 2013-02-19 | 2013-02-20 | $101.60 | $155K | -9.0% | +0.6% | +0.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.