1SP
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140 Summer Partners’s MasTec MTZ Stock Holding History

140 Summer Partners’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 		$106M Sell
329,220
-45,029
-12% -$12.2M 6.47% 3
2025
Q4 		$81.4M Sell
374,249
-8,789
-2% -$1.84M 6.01% 6
2025
Q3 		$81.5M Buy
+383,038
New +$70.1M 7.08% 2

Other funds holding MTZ

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
PP
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
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Victory Capital Management
Victory Capital Management San Antonio, Texas $178B AUM 37.23% 1-Year Est. Return
LPC
Lone Pine Capital Greenwich, Connecticut $12.5B AUM 54.4% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

140 Summer Partners's MTZ Position: Q1 2026 in Review

140 Summer Partners reduced its MasTec (MTZ) stake by 12% in Q1 2026, selling an estimated $12.2M and leaving 329,220 shares worth $106M. The position accounts for 6.47% of the portfolio, ranked #3.

140 Summer Partners first reported a position in MTZ in Q3 2025 and has held it in 3 quarters since. 807 funds tracked by Wall St. Rank hold MTZ as of Q1 2026.

  • 140 Summer Partners held 329,220 shares of MasTec worth $106M as of Q1 2026.
  • 140 Summer Partners sold 45,029 MasTec shares in Q1 2026, an estimated $12.2M.
  • MasTec made up 6.47% of 140 Summer Partners's portfolio in Q1 2026, its #3 holding.
  • 140 Summer Partners first reported a position in MasTec in Q3 2025 and has held it in 3 quarters since.
  • 807 funds tracked by Wall St. Rank held MasTec as of Q1 2026.

Based on 140 Summer Partners's 13F filing for Q1 2026, filed 14 May 2026.