Question 1

Who are the insiders buying MASTEC INC stock?

Accepted Answer

InsiderAct tracks all open-market purchases of MASTEC INC stock by corporate insiders — including officers, directors, and shareholders owning more than 10% — sourced from public SEC Form 4 filings.

Question 2

What does insider buying at a company mean?

Accepted Answer

When a corporate officer, director, or major shareholder purchases their own company's stock on the open market using personal funds, it signals confidence in the company's outlook. This is especially meaningful when multiple insiders buy within the same 7–14 day window (cluster buying) or when the purchase size exceeds $100,000.

Question 3

How do I find cluster buying signals for a company?

Accepted Answer

InsiderAct automatically detects cluster buying — two or more insiders independently purchasing shares within a 14-day window. When a cluster buy signal is active for a company, it appears prominently on the company's InsiderAct page and on the Signals tab.

Question 4

Has MASTEC INC had any recent large insider purchases?

Accepted Answer

InsiderAct tracks all open-market purchases of $100,000 or more at MASTEC INC. Large insider purchases are flagged as high-conviction signals because they represent meaningful personal capital commitments by executives or directors who have direct visibility into the company's operations and prospects.

Question 5

Where do the insider transactions on this page come from?

Accepted Answer

All transactions shown on InsiderAct company pages are sourced directly from SEC EDGAR Form 4 filings — the mandatory public disclosures that corporate insiders must submit within 2 business days of any stock transaction. InsiderAct ingests these filings in near real time and filters for open-market purchases and sales.


2026-06-05	2026-06-03	Csiszar Ernst N	Director	Sale	6,500	$371.17	$2,412,605
2026-05-19	2026-05-15	Csiszar Ernst N	Director	Tax Payment	23	$434.77	$10,000
2026-05-19	2026-05-15	Csiszar Ernst N	Director	Award	104	$0.00	$0
2026-05-19	2026-05-15	Dwyer Robert J	Director	Tax Payment	21	$434.77	$9,130
2026-05-19	2026-05-15	Dwyer Robert J	Director	Award	95	$0.00	$0
2026-05-19	2026-05-15	Parker Ava L	Director	Award	121	$0.00	$0
2026-05-19	2026-05-15	Parker Ava L	Director	Tax Payment	14	$434.77	$6,087
2026-05-19	2026-05-15	Campbell C Robert	Director	Award	95	$0.00	$0
2026-05-19	2026-05-15	Palomarez Javier Alberto	Director	Tax Payment	21	$434.77	$9,130
2026-05-19	2026-05-15	Johnson Julia L	Director	Award	95	$0.00	$0

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