Mark W. Marinko is CFO at Great Lakes Dredge & Dock CORP (GLDD). They have made 1 open-market trade across 1 company since 2026, most recently 2026-02-25.
CIK 0001612207
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 $58K since 2026, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| GLDD | 229,817 | $3.9M |
| SXC | 62,198 | $638K |
| Total | $4.5M |
Shares reported on the most recent Form 4, priced at the 2026-02-26 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 |
|---|---|---|---|---|---|---|---|---|
| SXC | BUY | 2026-02-25 | 2026-02-26 | $5.84 | $58K | +1.7% | +14.1% | +58.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.