MASTEC INC (MTZ) Stock Institutional Trading Activity


MASTEC INC (MTZ) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Third Point, Sequoia Financial Advisors, Muhlenkamp & Co, Renaissance Technologies LLC, and Hancock Classic Value. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2021Muhlenkamp & CoSell-95128,539$11,862
Q4 2021Hancock Classic ValueBuy11,414668,374$61,678
Q3 2021Muhlenkamp & CoSell-541128,634$11,099
Q3 2021Renaissance Technologies LLCBuy44,600254,700$21,976
Q3 2021Hancock Classic ValueSell-3,875656,960$56,683
Q2 2021Muhlenkamp & CoBuy541129,175$13,705
Q2 2021Renaissance Technologies LLCBuy31,000210,100$22,292
Q2 2021Hancock Classic ValueSell-279,391660,835$70,115
Q1 2021Muhlenkamp & CoSell-38,136128,634$11,688
Q1 2021Renaissance Technologies LLCBuy31,800179,100$16,782
Q1 2021Hancock Classic ValueBuy106,089940,226$88,099
Q4 2020Muhlenkamp & CoBuy294166,770$11,370
Q4 2020Hancock Classic ValueBuy834,137834,137$56,871
Q3 2020Muhlenkamp & CoBuy74,125166,476$7,025
Q2 2020Muhlenkamp & CoBuy92,35192,351$4,144
Q1 2020Renaissance Technologies LLCBuy23,500147,300$4,821
Q3 2019Renaissance Technologies LLCSell-6,100123,800$8,038
Q2 2019Renaissance Technologies LLCSell-103,900129,900$6,694
Q1 2018Renaissance Technologies LLCSell-427,200233,800$11,000
Q4 2017Renaissance Technologies LLCBuy474,500661,000$32,356
Q3 2017Renaissance Technologies LLCBuy159,500186,500$8,654
Q4 2016Renaissance Technologies LLCSell-413,80027,000$1,033
Q2 2015Renaissance Technologies LLCSell-353,000440,800$8,759
Q1 2015Renaissance Technologies LLCBuy459,300793,800$15,320
Q4 2014Renaissance Technologies LLCSell-136,400334,500$7,563
Q3 2014Renaissance Technologies LLCSell-65,500470,900$14,419
Q2 2014Renaissance Technologies LLCBuy98,823536,400$16,532
Q1 2014Renaissance Technologies LLCBuy197,677437,577$19,008
Q4 2013Renaissance Technologies LLCBuy201,500239,900$7,850
Q3 2013Renaissance Technologies LLCSell-258,50038,400$1,164

Frequently asked questions about MTZ activity

  • Which institutional owners are buying MTZ?

    Institutional owners buying MTZ include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in MTZ activity?

    "Buy" means an investor increased their reported position in MTZ compared to the prior reporting period. This reflects growing exposure to MASTEC INC (MTZ) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in MTZ increasing?

    Institutional interest in MTZ can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.