PEAK6’s MasTec MTZ Stock Holding History

PEAK6’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	$1.09M	Sell	3,376 -25,841	-88%	-$7M	﹤0.01%	1658
2025 Q4	$6.35M	Buy	29,217 +27,983	+2,268%	+$5.87M	0.01%	839
2025 Q3	$263K	Buy	+1,234	New	+$226K	﹤0.01%	2383

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

PEAK6's MTZ Position: Q1 2026 in Review

PEAK6 reduced its MasTec (MTZ) stake by 88% in Q1 2026, selling an estimated $7M and leaving 3,376 shares worth $1.09M. The position accounts for ﹤0.01% of the portfolio, ranked #1658.

PEAK6 first reported a position in MTZ in Q3 2025 and has held it in 3 quarters since. The position peaked at $6.35M in Q4 2025. 805 funds tracked by Wall St. Rank hold MTZ as of Q1 2026.

PEAK6 held 3,376 shares of MasTec worth $1.09M as of Q1 2026.
PEAK6 sold 25,841 MasTec shares in Q1 2026, an estimated $7M.
MasTec made up ﹤0.01% of PEAK6's portfolio in Q1 2026, its #1658 holding.
PEAK6 first reported a position in MasTec in Q3 2025 and has held it in 3 quarters since.
PEAK6's MasTec position peaked at $6.35M in Q4 2025.
805 funds tracked by Wall St. Rank held MasTec as of Q1 2026.

Based on PEAK6's 13F filing for Q1 2026, filed 14 May 2026.