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 Q2	$4.16M	Hold	10,000	–	–	0.01%	933
2026 Q1	$3.22M	Sell	10,000 -70,000	-88%	-$19M	0.01%	1115
2025 Q4	$17.4M	Buy	80,000 +77,000	+2,567%	+$16.2M	0.03%	421
2025 Q3	$638K	Buy	3,000 +700	+30%	+$128K	﹤0.01%	2045
2025 Q2	$392K	Sell	2,300 -2,500	-52%	-$360K	﹤0.01%	2221
2025 Q1	$560K	Sell	4,800 -8,700	-64%	-$1.17M	﹤0.01%	2038
2024 Q4	$1.84M	Buy	+13,500	New	+$1.81M	﹤0.01%	1475

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

PEAK6's MTZ Position: Q2 2026 in Review

PEAK6 increased its MasTec (MTZ) stake by 11% in Q2 2026, buying an estimated $141K and bringing the position to 3,744 shares worth $1.56M. The position accounts for ﹤0.01% of the portfolio, ranked #1468.

PEAK6 first reported a position in MTZ in Q3 2025 and has held it in 4 quarters since. The position peaked at $6.35M in Q4 2025. 911 funds tracked by Wall St. Rank hold MTZ as of Q2 2026.

PEAK6 held 3,744 shares of MasTec worth $1.56M as of Q2 2026.
PEAK6 bought 368 MasTec shares in Q2 2026, an estimated $141K.
MasTec made up ﹤0.01% of PEAK6's portfolio in Q2 2026, its #1468 holding.
PEAK6 first reported a position in MasTec in Q3 2025 and has held it in 4 quarters since.
PEAK6's MasTec position peaked at $6.35M in Q4 2025.
911 funds tracked by Wall St. Rank held MasTec as of Q2 2026.

Based on PEAK6's 13F filing for Q2 2026, filed 13 Aug 2026.