| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Director
1 company
Ernst N Csiszar is Director at MTZ. Ernst N Csiszar's net worth is not public. Form 4 filings only show shares in the companies where this person is an insider; those holdings are worth an estimated $2.2M at current prices.
Our model assigns Ernst N Csiszar a below-average insider score of 33/100, based on 6 past trades. Over a 12-month horizon, 25.0% of those trades were profitable, with an average 12-month return of -40.4%.
The MTZ filings lean toward selling, a net 26,634 shares.
Ernst N Csiszar has 55 Form 4 filings on record from February 2015 to August 2026, all as Director at MasTec (MTZ), 2015–2026.
The 101 reported transactions were 47 stock awards, 46 tax withholdings, 7 open-market sales and 1 gift.
Counted by filing, the open-market trades come to no purchases and 7 sales worth about $5.7M.
The largest open-market sale was 6,500 shares of MTZ at an average $371.17 on June 3, 2026, about $2.4M.
None of the 4 sales since April 2023 was marked as made under a Rule 10b5-1 trading plan.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 3, 2026 | MTZ Mastec, Inc. | Director | Sell | 6,500 | $371.17 | $2,412,605.00 | -37.5% | -35.7% | - | |
| Mar 3, 2026 | MTZ Mastec, Inc. | Director | Sell | 6,500 | $300.40 | $1,952,600.00 | -27.4% | +20.4% | - | |
| Mar 24, 2025 | MTZ Mastec Inc | Director | Sell | 2,517 | $131.63 | $331,320.76 | -9.9% | +26.3% | +145.0% | |
| Aug 22, 2024 | MTZ Mastec Inc | Director | Sell | 4,853 | $110.96 | $538,480.63 | -16.3% | +28.7% | +61.7% | |
| Mar 29, 2021 | MTZ Mastec Inc | Director | Sell | 1,564 | $91.01 | $142,333.70 | -5.9% | +23.1% | +0.6% | |
| Mar 23, 2021 | MTZ Mastec Inc | Director | Sell | 1,700 | $89.92 | $152,859.58 | -6.0% | +18.7% | -0.6% | |
| Sep 10, 2019 | MTZ Mastec Inc | Director | Sell | 3,000 | $64.53 | $193,575.30 | -10.5% | - | - |