MasTec Q2 2026: GAAP EPS Cut Sends Shares Down 15%

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MasTec shares fell roughly 14% on July 31, 2026, after the company cut full-year 2026 GAAP EPS guidance to $6.20 from $6.77 despite Q2 revenue climbing 23% to $4.37 billion.

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What Happened

MasTec posted Q2 2026 revenue of $4.37 billion, a 23.4% year-over-year increase that narrowly exceeded the analyst consensus near $4.3 billion. GAAP net income reached $145.7 million, up 61.7% from the prior year, while adjusted EBITDA climbed 39.8% to $384.2 million. Adjusted EBITDA margin expanded 100 basis points to 8.8%. Adjusted diluted EPS came in at $2.22, up 48.8% year-over-year but a fraction below the $2.23 Wall Street estimate. GAAP diluted EPS of $1.65 trailed expectations by a wider margin.

The sharper market reaction, however, centered on full-year guidance. Management cut its 2026 GAAP diluted EPS outlook to $6.20—a reduction of $0.57 from the $6.77 midpoint set during Q1 2026 earnings in late April. At the same time, the company raised its full-year adjusted diluted EPS guidance to $9.30, a 42% year-over-year improvement, and lifted revenue guidance to $18.2 billion from a prior $17.5 billion midpoint. The widening spread between GAAP and adjusted earnings reflects non-cash charges, primarily amortization of acquisition-related intangibles, which suppress reported profits without affecting operating cash flows.

Chief Executive Jose Mas described Q2 growth as "broad-based," pointing to solid execution and margin expansion across the company's infrastructure construction portfolio.

Segment Performance

The Power Delivery segment, which deploys construction crew teams to build and maintain power lines, substations, and distribution networks for electric utilities, generated Q2 revenue of $1.25 billion, a 19.2% year-over-year gain. The result reflects ongoing utility capital programs targeting transmission upgrades, grid hardening, and last-mile distribution expansion. Clean Energy and Infrastructure, the company's largest segment, contributed $1.62 billion in Q2 revenue, with its 18-month backlog surging 58% year-over-year. Communications added $888.9 million, and Pipeline Infrastructure posted $642.8 million.

MasTec's total 18-month backlog reached $21.4 billion, a record, up 30% year-over-year and $1.1 billion higher than the prior quarter. The depth of committed work signals strong near-term utilization for construction crew resources across all four segments.

Strategic Context

The American power grid is undergoing its largest capacity expansion in decades, driven by electricity demand from artificial intelligence data centers, electric vehicle adoption, and industrial facilities returning to the United States. Utilities are committing multiyear capital programs to build out power lines, modernize aging transmission corridors, and interconnect large-scale renewable generation—all of which require the specialty construction crew capabilities that MasTec provides. Federal permitting reforms and state-level rate case approvals have kept project timelines moving despite broader macroeconomic uncertainty.

The divergence between MasTec's GAAP and adjusted earnings figures has grown as the company integrated multiple acquisitions in prior years. Intangible amortization, a non-cash accounting charge, reduces GAAP EPS without diminishing the company's ability to execute or generate free cash flow—a distinction increasingly relevant as infrastructure contractors take on longer-cycle, capital-intensive projects.

Outlook

For Q3 2026, MasTec guided revenue of $4.93 billion and adjusted diluted EPS of $2.98, both above the analyst consensus of $4.94 billion and $2.89. Full-year adjusted EBITDA guidance was raised to $1.6 billion. The record backlog provides multi-year visibility for power lines and infrastructure construction activity well into 2027. The GAAP EPS guidance cut will continue to weigh on near-term sentiment, but the company's operating momentum and backlog depth leave the adjusted earnings outlook intact.