Custom Index Systems’s MasTec MTZ Stock Holding History

Custom Index Systems’s Portfolio MTZ Stock Details MTZ Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$953K	Buy	2,962 +27	+0.9%	+$7.31K	0.42%	63
2025 Q4	$638K	Sell	2,935 -1,866	-39%	-$392K	0.28%	107
2025 Q3	$1.02M	Buy	4,801 +1,809	+60%	+$331K	0.3%	96
2025 Q2	$510K	Buy	2,992 +450	+18%	+$64.8K	0.24%	130
2025 Q1	$297K	Buy	+2,542	New	+$343K	0.15%	204
2024 Q4	–	Sell	-3,721	Closed	-$458K	–	265
2024 Q3	$458K	Buy	+3,721	New	+$406K	0.25%	123

Other funds holding MTZ

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Peconic Partners New York $5.78B AUM 127.23% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

HCC

Hill City Capital Boston, Massachusetts $2.8B AUM 79.27% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Victory Capital Management San Antonio, Texas $156B AUM 27.51% 1-Year Est. Return

LPC

Lone Pine Capital Greenwich, Connecticut $12.5B AUM 54.4% 1-Year Est. Return

First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Custom Index Systems's MTZ Position: Q1 2026 in Review

Custom Index Systems increased its MasTec (MTZ) stake by 0.92% in Q1 2026, buying an estimated $7.31K and bringing the position to 2,962 shares worth $953K. The position accounts for 0.42% of the portfolio, ranked #63.

Custom Index Systems first reported a position in MTZ in Q3 2024 and has held it in 6 quarters since. The position peaked at $1.02M in Q3 2025. 805 funds tracked by Wall St. Rank hold MTZ as of Q1 2026.

Custom Index Systems held 2,962 shares of MasTec worth $953K as of Q1 2026.
Custom Index Systems bought 27 MasTec shares in Q1 2026, an estimated $7.31K.
MasTec made up 0.42% of Custom Index Systems's portfolio in Q1 2026, its #63 holding.
Custom Index Systems first reported a position in MasTec in Q3 2024 and has held it in 6 quarters since.
Custom Index Systems's MasTec position peaked at $1.02M in Q3 2025.
805 funds tracked by Wall St. Rank held MasTec as of Q1 2026.

Based on Custom Index Systems's 13F filing for Q1 2026, filed 29 Apr 2026.