ACK Asset Management’s MasTec MTZ Stock Holding History

ACK Asset Management’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
2013 Q3	–	Sell	-1,000	Closed	-$15K	–	35
2013 Q2	$15K	Buy	+1,000	New	+$30.1K	0.01%	40

Other funds holding MTZ

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

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

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

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

HRCM

Hood River Capital Management Palm Beach Gardens, Florida $9.98B AUM 145.42% 1-Year Est. Return

Nordea Investment Management Stockholm, Sweden $107B AUM 24.58% 1-Year Est. Return

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

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

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

ACK Asset Management's MTZ Position: Q3 2025 in Review

ACK Asset Management sold out of MasTec (MTZ) in Q3 2025, closing a stake of 125,000 shares — an estimated $21.3M sold.

ACK Asset Management first reported a position in MTZ in Q4 2017 and held it in 17 quarters. The position peaked at $95.1M in Q3 2024. 651 funds tracked by Wall St. Rank hold MTZ as of Q3 2025.

ACK Asset Management reported no remaining MasTec position as of Q3 2025 after selling out during the quarter.
ACK Asset Management sold 125,000 MasTec shares in Q3 2025, an estimated $21.3M.
ACK Asset Management first reported a position in MasTec in Q4 2017 and held it in 17 quarters.
ACK Asset Management's MasTec position peaked at $95.1M in Q3 2024.
651 funds tracked by Wall St. Rank held MasTec as of Q3 2025.

Based on ACK Asset Management's 13F filing for Q3 2025, filed 14 Nov 2025.