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MTZ · NYSE · Engineering & Construction

MasTec (MTZ)

Engineers, builds and maintains communications, clean-energy, power-delivery and pipeline infrastructure.

$217.62
vs last close−4.07 (−1.84%)

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13F · 13D/G · Form 4

Institutions74.70%59.99M shares
947 holders · as of Jun 30, 2026
Insiders14.02%11.26M shares
14 holders · as of Aug 18, 2026
Other11.28%9.06M shares
remainder

80.30M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing

13F · 13D/G · Form 4

HolderStakeSharesDate
BlackRock, Inc.Institution
9.51%7.64Mas of Jun 30, 2026
Jose Ramon Mas1Insiderdirector, officer: CEO
7.70%6.19Mfiled Aug 13, 2026
Jorge MasInsiderdirector
5.67%4.56Mfiled Mar 20, 2026
Peconic Partners LLCInstitution
4.58%3.68Mas of Jun 30, 2026
Vanguard Capital Management LLCInstitution
3.53%2.83Mas of Jun 30, 2026
Vanguard Portfolio Management LLCInstitution
3.50%2.81Mas of Jun 30, 2026
State Street CorpInstitution
2.80%2.24Mas of Jun 30, 2026
Hill City Capital, LPInstitution
2.68%2.16Mas of Jun 30, 2026
Lone Pine Capital LLCInstitution
1.68%1.35Mas of Jun 30, 2026
Bank of America Corp /DE/Institution
1.66%1.34Mas of Jun 30, 2026
First Trust Advisors LPInstitution
1.65%1.33Mas of Jun 30, 2026
JPMorgan Chase & CoInstitution
1.64%1.32Mas of Jun 30, 2026
Geode Capital Management, LLCInstitution
1.59%1.28Mas of Jun 30, 2026
Invesco Ltd.Institution
1.55%1.24Mas of Jun 30, 2026
Victory Capital Management IncInstitution
1.51%1.21Mas of Jun 30, 2026
Hood River Capital Management LLCInstitution
1.46%1.17Mas of Jun 30, 2026
FMR LLCInstitution
1.11%890,103as of Jun 30, 2026
Ameriprise Financial IncInstitution
0.92%734,976as of Jun 30, 2026
Bank of New York Mellon CorpInstitution
0.84%674,288as of Jun 30, 2026
Mirae Asset Global Etfs Holdings Ltd.Institution
0.82%660,440as of Jun 30, 2026
AQR Capital Management LLCInstitution
0.82%657,603as of Jun 30, 2026
Morgan StanleyInstitution
0.81%653,503as of Jun 30, 2026
Dimensional Fund Advisors LPInstitution
0.79%636,286as of Jun 30, 2026
Electron Capital Partners, LLCInstitution
0.77%620,190as of Jun 30, 2026
Canada Pension Plan Investment BoardInstitution
0.77%619,910as of Jun 30, 2026
  1. Jose Ramon Mas's transaction reports restate only vehicles that traded; the 2026 ownership statement (6.19M) is used instead.

13F, as of Jun 30, 2026

947 holders · 59.99M shares · 190 new positions · 517 increased · 297 reduced · 81 closed

HolderShares% outstandingChg q/qFiled
BlackRock, Inc.7.64M9.51%+328.9KAug 7, 2026
Peconic Partners LLC3.68M4.58%+100.0KAug 14, 2026
Vanguard Capital Management LLC2.83M3.53%+27.6KAug 13, 2026
Vanguard Portfolio Management LLC2.81M3.50%+42.1KAug 13, 2026
State Street Corp2.24M2.80%+375.0KAug 7, 2026
Hill City Capital, LP2.16M2.68%0Aug 17, 2026
Lone Pine Capital LLC1.35M1.68%−185.9KAug 14, 2026
Bank of America Corp /DE/1.34M1.66%+5.9KAug 14, 2026

13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
Jose Ramon Masincl. Jose Ramon Mas Holdings, LLC, Jose Ramon Mas Irrevocable Family Trust +4 more7.70%6.19M13DAug 13, 2026
BlackRock, Inc.6.80%5.42M13GApr 17, 2025

Form 4

Latest trades

DateInsiderTypeSharesAvg priceOwned after
Jun 3, 2026
Ernst N. Csiszardirector
Sale6,500$371.1710,816
May 4, 2026
C. Robert Campbelldirector
Sale3,000$417.0030,646
Mar 25, 2026
Javier Alberto Palomarezdirector
Sale950$325.4310,592
Mar 3, 2026
Ernst N. Csiszardirector
Sale6,500$300.4017,235
Nov 3, 2025
Timothy Michael Loveofficer: CAO
Sale1,929$206.159,757
Sep 29, 2025
C. Robert Campbelldirector
Sale2,000$210.3933,277

House and Senate disclosures

MemberTypeAmountOwnerTradedDisclosed
Rep. Thomas H. Kean · NJ07Purchase$1,001 – $15,000Aug 21, 2026Sep 14, 2026
Sen. Markwayne Mullin · OKSale$15,001 – $50,000JointFeb 4, 2026Mar 2, 2026