Shares of MasTec surged 8.4% to $294.57 after BlackRock disclosed a 9.51% stake — roughly 7.64 million shares worth approximately $3.18 billion — in the infrastructure contractor, marking the largest known institutional position build in the company this year. The move arrives at a moment when MasTec is riding record results but also facing questions about whether its stock, up sharply over the past year, still has room to run. BlackRock Puts $3.18 Billion Behind MasTec — But Can the Infrastructure Giant Deliver on a $21.4 Billion Backlog?
Shares jumped 8.4% to $294.57 after the world's largest asset manager disclosed a 9.51% stake in MasTec, snapping up roughly 7.64 million shares worth $3.18 billion. The buy amounts to a massive institutional endorsement of an infrastructure contractor that just posted record results — but also one whose stock cratered 18.5% just three weeks ago after earnings spooked investors worried about near-term execution.
• BlackRock Is Betting Big on the AI and Energy Construction Boom MasTec builds the physical backbone of the energy transition and the AI data center buildout — power lines, pipelines, solar farms, fiber networks. The company raised full-year 2026 guidance to $18.2 billion in revenue and $1.6 billion in adjusted EBITDA.
Full-year adjusted earnings per share were hiked 42% to $9.30. At today's price, that puts the stock at roughly 31.7x forward earnings — a premium that BlackRock is apparently willing to pay for a company sitting on a record $21.4 billion backlog, reflecting a nearly $5 billion annual increase.
• The Post-Earnings Selloff Created BlackRock's Entry Point
Despite strong results and raised guidance, MasTec shares fell 18.5% to $264.36 following its July 31 earnings report.
Investors punished a cut in communications-segment revenue guidance to $3.25 billion, driven by wireless spectrum deployment delays and wireline project timing issues. That selloff — which pushed the stock from above $324 to the low $260s — likely gave BlackRock a favorable window to build a position at a meaningful discount.
• The Backlog Is Enormous, but Turning It Into Profit Is the Real Test
Much of the newly booked work is scheduled for 2027 and beyond rather than contributing to near-term 2026 results.
The most important risk is that cost overruns, delays, or project cancellations could turn that backlog into lower-than-expected earnings.
Management expects over $1 billion of operating cash flow for 2026 , and the company anticipates net leverage — total debt minus cash, divided by earnings — below 2.0x by year-end.
• Clean Energy Is the Growth Engine; Telecom Is the Drag
Clean Energy and Infrastructure revenue grew 43%, driven by renewables and water infrastructure demand. Meanwhile, the Communications segment faced pressure from spectrum rollout delays, and MasTec reduced that division's revenue expectations for 2026. BlackRock's bet is essentially that clean energy and data center work will more than offset telecom softness — a reasonable wager if U.S. power demand keeps climbing, but one that leaves little margin for error at this valuation.