MASTEC INC (MTZ) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-06-05

MASTEC INC (MTZ) has filed 9 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-05. 3 Form 8-K material event filings were reported by MTZ in the last 90 days. 2 Form 144 notices of proposed sale were filed for MTZ stock. InsiderAlpha tracks every MTZ SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About MASTEC INC (MTZ)

SIC classificationWater, Sewer, Pipeline, Comm & Power Line Construction (SIC 1623)
SEC CIK0000015615

90-Day SEC Filing Activity

Form 4 filings (90d)9
Form 8-K filings (90d)3
Form 144 notices (90d)2
Latest Form 4 filing2026-06-05

Recent MTZ Insider Transactions (Form 4)

DateInsiderRoleTransactionSharesPriceValueFiling
Csiszar Ernst NDirectorS — Open-market sale6.5K$371.17$2.41MSEC
Campbell C RobertDirectorA — Grant or award95$0.00SEC
Dwyer Robert JDirectorA — Grant or award95$0.00SEC
Palomarez Javier AlbertoDirectorF — Tax withholding / forfeiture21$434.77$9KSEC
Csiszar Ernst NDirectorA — Grant or award104$0.00SEC
Parker Ava LDirectorF — Tax withholding / forfeiture14$434.77$6KSEC
Parker Ava LDirectorA — Grant or award121$0.00SEC
Csiszar Ernst NDirectorF — Tax withholding / forfeiture23$434.77$10KSEC
Dwyer Robert JDirectorF — Tax withholding / forfeiture21$434.77$9KSEC
Palomarez Javier AlbertoDirectorA — Grant or award95$0.00SEC
JOHNSON JULIA LDirectorA — Grant or award95$0.00SEC
Campbell C RobertDirectorS — Open-market sale3.0K$417.00$1.25MSEC
Palomarez Javier AlbertoDirectorS — Open-market sale950$325.43$309KSEC
MAS JORGEDirectorA — Grant or award15.8K$0.00SEC
MAS JOSE RAMONCEOA — Grant or award26.4K$0.00SEC

All transactions sourced from SEC EDGAR Form 4 filings for MASTEC INC (MTZ). Updated in real time as new filings are submitted to the SEC.

Most-Active MTZ Insiders — Last 90 Days

InsiderForm 4 filingsTotal transaction value
Csiszar Ernst N3$2.42M
Palomarez Javier Alberto2$9K
Parker Ava L2$6K
Campbell C Robert2$1.25M
Dwyer Robert J2$9K

Recent MTZ Form 8-K Material Events

Recent MTZ Form 144 Notices of Proposed Sale

Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.

Recent Insider Filings

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in MTZ insider filings:

POpen-market purchase by the insider
SOpen-market sale by the insider
AGrant, award, or other acquisition from the issuer
MExercise or conversion of derivative security (e.g. options)
FPayment of exercise price or tax liability via share withholding
GBona-fide gift of securities
DDisposition to the issuer (e.g. share buyback participation)
JOther acquisition or disposition
XExercise of in-the-money or at-the-money derivative security
CConversion of derivative security
VTransaction voluntarily reported earlier than required

MTZ Insider Trading — FAQ

What is the latest insider trade for MTZ?
MASTEC INC (MTZ) had 9 insider filings in the last 90 days, with the most recent on 2026-06-05. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying MTZ stock?
0 insider purchases of MTZ were filed in the last 90 days.
How many insiders are selling MTZ stock?
0 insider sales of MTZ were filed in the last 90 days.
Where can I see MTZ SEC filings (Form 4, 10-K, 10-Q, 8-K)?
InsiderAlpha aggregates every MTZ SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

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