DOSSIER · 13F Holders · Q1 2026Industrials · Water, Sewer, Pipeline, Comm & Power Line Construction
MTZ

MASTEC INC

862 institutions still hold MASTEC INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 576323109·Water, Sewer, Pipeline, Comm & Power Line Construction·862 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$10.1B
visible holders
Holders
862
filers reporting
Concentration
23.21%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

MasTec's institutional base shows a sharp split between its largest and smallest holders this quarter. Assenagon Asset Management, still the top holder at 43.2% of MTZ's $124.5 million in tracked institutional value, cut its stake nearly in half — shares down 49.4% (255,222 to 129,199), a $28.4 million reduction that was easily the largest sale among MTZ's 44 institutional holders. Community Trust & Investment Co, the second-largest holder at 24.7% of the book, trimmed a similar 32.9% of its shares. Both sales came during a quarter when MTZ's share price rose roughly 29%, meaning the two largest holders used the rally to take real profits rather than simply watch their stakes appreciate. Underneath that selling, a different pattern emerged: PensionDanmark nearly doubled its position (93.7% more shares), CoreCap Advisors grew its stake 200-fold (from 5 shares to 1,001), and four new holders — including Veracity Capital LLC and Fulton Bank — opened fresh positions. The stock's biggest institutional owners are cashing in gains that its smaller and newer holders are just beginning to build.

MasTec (MTZ) carries $124.5 million in tracked institutional value across 44 holders as of the quarter ended June 30, 2026, and the data implies the stock's share price rose roughly 29% over the quarter — a backdrop that makes this quarter's ownership shifts more legible than a simple price move would explain on its own.

The top two holders sold into the rally

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$2.4B7.3M0.04%Q1 2026
02
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$902M2.8M0.02%Q1 2026
03
Vanguard Portfolio Management
CIK 0002100121· Index
$891M2.8M0.05%Q1 2026
04
Hill City Capital, LP
CIK 0001837343
$693M2.2M24.77%Q1 2026
05
STATE STREET CORP
CIK 0000093751
$602M1.9M0.02%Q1 2026
06
VICTORY CAPITAL MANAGEMENT INC
CIK 0001040188
$512M1.6M0.33%Q1 2026
07
FIRST TRUST ADVISORS LP
CIK 0001125816· Index
$454M1.4M0.32%Q1 2026
08
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$441M1.4M0.03%Q1 2026
09
BANK OF AMERICA CORP /DE/
CIK 0000070858
$428M1.3M0.03%Q1 2026
10
Hood River Capital Management LLC
CIK 0001578177
$417M1.3M4.18%Q1 2026
11
Invesco Ltd.
CIK 0000914208
$394M1.2M0.04%Q1 2026
12
PECONIC PARTNERS LLC
CIK 0001050464
$348M1.6M8.27%Q4 2025
13
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$235M732K0.05%Q1 2026
14
Electron Capital Partners, LLC
CIK 0001586986
$229M713K8.98%Q1 2026
15
NORDEA INVESTMENT MANAGEMENT AB
CIK 0001218210
$229M734K0.21%Q1 2026
16
Bank of New York Mellon Corp
CIK 0001390777
$211M656K0.04%Q1 2026
17
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$210M660K0.10%Q1 2026
18
FMR LLC
CIK 0000315066
$202M628K0.01%Q1 2026
19
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.
CIK 0001705339
$195M605K0.26%Q1 2026
20
MORGAN STANLEY
CIK 0000895421
$189M587K0.01%Q1 2026
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Insiders at MASTEC INC
Csiszar Ernst NJohnson Julia LPalomarez Javier AlbertoCampbell C RobertParker Ava LDwyer Robert JLove Timothy MichaelDe Cardenas Alberto