Form4insider filings, from the source

Company · CIK 0000015615 · SIC 1623 — Water, Sewer, Pipeline, Comm & Power Line Construction · NYSE

MASTEC INC · MTZ

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $2.4M · 1net −$2.4M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesMar 28Apr 27May 28Jun 28Jul 29Aug 28Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 14, 2026 AForm 4 →Aug 18, 5:14 pm EDTManuel Benito MirandaDirector152——152—
Aug 14, 2026 AFForm 4 →Aug 18, 4:43 pm EDTJavier Alberto PalomarezDirector170$297.59$9,22510,774—
Aug 14, 2026 AFForm 4 →Aug 18, 4:41 pm EDTErnst N CsiszarDirector186$297.59$10,11810,934—
Aug 14, 2026 AForm 4 →Aug 18, 4:40 pm EDTC Robert CampbellDirector139——30,880—
Aug 14, 2026 AForm 4 →Aug 18, 4:40 pm EDTAlex SpiroDirector139——139—
Aug 14, 2026 AFForm 4 →Aug 18, 4:40 pm EDTRobert J DwyerDirector170$297.59$9,22520,960—
Aug 14, 2026 AForm 4 →Aug 18, 4:39 pm EDTJulia L JohnsonDirector139——73,474—
Aug 14, 2026 AFForm 4 →Aug 18, 4:38 pm EDTAva L ParkerDirector197$297.59$5,9525,549—
Jun 3, 2026 SForm 4 →Jun 5, 4:35 pm EDTErnst N CsiszarDirector6,500$371.17$2,412,60510,816−37.5%

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 11, 2026 JForm 4 →Aug 13, 4:15 pm EDTJose Ramon MasCEO, Director681,588——340,794—
Aug 11, 2026 JForm 4 →Aug 13, 4:15 pm EDTJorge MasDirector2,198,670——1,099,335—