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 Q2	$1.34M	Buy	3,231 +269	+9%	+$103K	0.48%	49
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 $6.73T AUM 46.02% 1-Year Est. Return

Peconic Partners New York $8.04B AUM 107.18% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

HCC

Hill City Capital Boston, Massachusetts $4.28B AUM 80.76% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

LPC

Lone Pine Capital Greenwich, Connecticut $16.4B AUM 99.7% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return

Custom Index Systems's MTZ Position: Q2 2026 in Review

Custom Index Systems increased its MasTec (MTZ) stake by 9.1% in Q2 2026, buying an estimated $103K and bringing the position to 3,231 shares worth $1.34M. The position accounts for 0.48% of the portfolio, ranked #49.

Custom Index Systems first reported a position in MTZ in Q3 2024 and has held it in 7 quarters since. 911 funds tracked by Wall St. Rank hold MTZ as of Q2 2026.

Custom Index Systems held 3,231 shares of MasTec worth $1.34M as of Q2 2026.
Custom Index Systems bought 269 MasTec shares in Q2 2026, an estimated $103K.
MasTec made up 0.48% of Custom Index Systems's portfolio in Q2 2026, its #49 holding.
Custom Index Systems first reported a position in MasTec in Q3 2024 and has held it in 7 quarters since.
911 funds tracked by Wall St. Rank held MasTec as of Q2 2026.

Based on Custom Index Systems's 13F filing for Q2 2026, filed 14 Aug 2026.