Ernst N. Csiszar is Director at MASTEC INC (MTZ). They have made 9 open-market trades across 1 company since 2011, most recently 2026-08-14.
CIK 0001341639
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 9 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MTZ | 10,934 | $2.1M |
Shares reported on the most recent Form 4, priced at the 2026-08-18 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 |
|---|---|---|---|---|---|---|---|---|
| MTZ | SELL | 2026-06-03 | 2026-06-05 | $371.17 | $2.4M | +1.7% | +3.1% | -37.0% |
| MTZ | SELL | 2026-03-03 | 2026-03-05 | $300.40 | $2.0M | +6.2% | +17.6% | +29.1% |
| MTZ | SELL | 2025-03-24 | 2025-03-26 | $131.63 | $663K | -11.5% | +3.0% | +39.5% |
| MTZ | SELL | 2024-08-22 | 2024-08-26 | $110.96 | $1.1M | -11.5% | +12.4% | +30.1% |
| MTZ | SELL | 2021-03-29 | 2021-03-31 | $91.01 | $285K | +5.0% | +10.4% | +11.3% |
| MTZ | SELL | 2021-03-23 | 2021-03-25 | $89.92 | $153K | +8.0% | +12.9% | +14.8% |
| MTZ | SELL | 2019-09-10 | 2019-09-12 | $64.53 | $194K | -0.4% | +3.6% | -6.0% |
| MTZ | SELL | 2012-11-27 | 2012-11-29 | $22.84 | $228K | -15.2% | +2.4% | +2.4% |
| MTZ | SELL | 2011-09-15 | 2011-09-16 | $20.42 | $153K | -15.2% | +2.4% | +2.4% |
| MTZ | SELL · 10b5-1 | 2011-03-28 | 2011-03-30 | $20.36 | $631K | -15.2% | +2.4% | +2.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.