SightfileU.S. market data from official filings

MASTEC INC (MTZ)

Name: MASTEC INC (MTZ) — Institutional ownership, SEC filings and insider activity
Creator: Sightfile
License: https://www.sec.gov/privacy#dissemination

Institutional ownership, SEC filings and insider activity

Sector: Industry · SEC CIK 0000015615 · EDGAR filings · Updated 2026-07-24

MASTEC INC (MTZ) has reported institutional ownership of 73.4%, with 796 institutional managers holding positions valued at $18.6B per the latest 13F reporting period. SEC filings include an active triggering event that accelerates or increases a direct financial obligation (8-K Item 2.04). The company has 3 bond series in the registry.

Institutional ownership

73.4%

Institutional managers

796

Reported 13F value

$18.6B

Insider activity

63 trans.

−$9.98M net selling

Data flags

1 active

from SEC filings

Filings this week (1)

2026-07-24 — D filed

Every filing links to the official SEC document. Real-time filing alerts for this company are available inside the app.

Latest updates

2026-07-20 — Current report (8-K) filed
2026-07-10 — Initial insider ownership filed (Form 3)
2026-07-07 — Current report (8-K) filed
2026-06-26 — 11-K filed
2026-06-05 — Insider transaction reported (Form 4)
2026-06-03 — Notice of proposed sale filed (Form 144)
2026-05-22 — Current report (8-K) filed
2026-05-19 — Insider transaction reported (Form 4)

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, MASTEC INC has 796 institutional holders and institutional ownership of 73.4%.

#	Institution	Reported value	% of tracked total
1	BlackRock, Inc.	$2.35B	12.6%
2	PECONIC PARTNERS LLC	$1.15B	6.2%
3	VANGUARD CAPITAL MANAGEMENT LLC	$902.3M	4.8%
4	VANGUARD PORTFOLIO MANAGEMENT LLC	$891.2M	4.8%
5	Hill City Capital, LP	$693.3M	3.7%
6	STATE STREET CORP	$601.6M	3.2%
7	VICTORY CAPITAL MANAGEMENT INC	$512.4M	2.8%
8	LONE PINE CAPITAL LLC	$492.6M	2.6%
9	FIRST TRUST ADVISORS LP	$454.2M	2.4%
10	GEODE CAPITAL MANAGEMENT, LLC	$441.5M	2.4%

Full holder history and quarter-over-quarter changes are available inside the app.

Insider activity

Insiders reported 63 transactions (0 buys, 12 sells) across 12 reporting insiders, with a net reported value of −$9.98M.

Quarterly net insider value, as reported in Form 4 filings.

Data flags from SEC filings

Active triggering event that accelerates or increases a direct financial obligation (8-K Item 2.04), most recently filed 2020-07-20 (recurring since 2020-07-20) — source filing. The authoritative details are those stated in the filing itself.

Debt profile

3 active bond series in the registry, coupons ranging 4.50%–6.62%, maturities through 2029, built from the company's own prospectus filings.

Debt maturity schedule

Principal coming due by year for MASTEC INC, from the company's own SEC prospectus filings (424B) tracked by Sightfile.

Year	Bond series maturing	Known principal due
2028	1	—
2029	2	$775.1M

Coupons, seniority and prospectus links for each series are available inside the app.

Fails-to-deliver

The SEC's fails-to-deliver file for 2026-06-30 reports 48,687 failed-to-deliver shares ($530.8K) for MTZ — an official data point published by the SEC, shown as reported.

Related companies

PULTE GROUP INC (PHM) · VERALTO CORP (VLTO) · C H ROBINSON WORLDWIDE IN (CHRW) · WOODWARD INC (WWD) · ROCKET LAB CORP (RKLB) · EXPEDITORS INTL WASH INC (EXPD)

See full history, cross-references and alerts on Sightfile

Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-07-24.