LONE PINE CAPITAL LLC

Position in MTZ — Mastec Inc

CIK 1061165 GREENWICH, CT

Position in MTZ

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$559,666,021

+$67,065,994 QoQ

Shares Held

1,345,157

-12.1% QoQ

Ownership

1.68%

of shares outstanding

% of Portfolio

3.42%

of 13F equity value

Holder Rank

of 910 holders

Holding Since

Mar 2026

2 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

LONE PINE CAPITAL LLC holds $1,365,779,793 across 3 Engineering & Construction names. MTZ ranks #1 (41.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MTZ	Mastec Inc This page	1,345,157	$559,666,021
2	STRL	Sterling Infrastructure, Inc.	609,643	$511,709,948
3	AGX	Argan Inc	368,673	$294,403,824

2 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$559,666,021	1,345,157	-12.1%	Shares	Sole	2026-08-14
2026-03-31	$492,600,027	1,531,050	—	Shares	Sole	2026-05-15
No filing history on record for this holder in this stock.