MasTec, Inc. (NYSE: MTZ) experienced a notable rally last week, with shares climbing 10.9% to close Friday at $297.59. The stock gained an additional 4.0% during Friday's trading session, though it remains 8.3% below its pre-earnings close from July 30. This recovery has shifted the market's focus from demand to cash conversion, as the company grapples with a record backlog and negative free cash flow.
The infrastructure contractor reported a backlog of $21.4 billion, representing approximately 118% of its projected 2026 revenue of $18.2 billion. While this provides strong revenue visibility, it does not guarantee immediate cash inflows. In the second quarter, free cash flow came in at negative $59 million, a deterioration from the negative $45 million in the same period last year. Working capital requirements and acquisition-related debt remain key concerns for investors.
The rally was not isolated to MasTec. Peers also saw gains, with Sterling Infrastructure (NASDAQ: STRL) advancing 9.1%, Quanta Services (NYSE: PWR) climbing 3.8%, and Primoris Services (NYSE: PRIM) increasing by 3.2%. MasTec led the group, reflecting optimism about the company's growth prospects.
MasTec's latest quarterly results were strong on several fronts. Revenue surged 23.4% to $4.37 billion, while adjusted EBITDA rose 39.8% to $384 million, with margins expanding by one percentage point to 8.8%. Adjusted diluted EPS came in at $2.22, up 48.8% from $1.49 a year ago. The 18-month backlog grew 30% to $21.39 billion, signaling robust demand across its segments.
CEO José Mas highlighted "excellent performance in revenue growth, margin expansion and backlog development." However, the market was not entirely satisfied, as adjusted earnings met consensus estimates but shares fell 18.9% the following day. The cautious outlook stemmed from mixed segment performance. Pipeline infrastructure posted an EBITDA margin of 18.4%, while the communications segment dropped to 8.2%, a decline of 1.7 percentage points.
Segment revenue growth was led by clean energy and infrastructure, which advanced 43.4% to $1.62 billion, with backlog up 58% year-over-year. Power delivery gained 19.2% to $1.25 billion, and pipeline infrastructure rose 19.1% to $643 million. As data-center projects expand, project execution is emerging as the next constraint, according to industry analysts.
MasTec completed its $1.65 billion acquisition of The Superior Group on July 20, adding roughly 3,000 employees and expanding its electrical-construction expertise for data centers. The cash component was financed through available cash, credit lines, and term loans. As of June 30, long-term debt had already climbed to $2.57 billion, prior to the deal closing, increasing the challenge for cash conversion.
Analyst recommendations prior to the earnings release were bullish, with price targets ranging from $470 to $581. Guggenheim had a Buy rating with a $518 target, TD Cowen a Buy at $470, and Cantor Fitzgerald an Overweight at $581. The broader consensus target stands at $466.89, implying a potential 56.9% upside, though projections may be revised as analysts factor in cash-flow and financing expectations.
Management projects adjusted earnings per share of $9.30 for 2026, valuing the stock at roughly 32 times the forecast. This remains a high valuation for a contractor, despite the backlog growth. As U.S. markets resume trading Monday, investors will watch whether Friday's momentum can push shares above $300. Remaining above that level would still leave part of the gap from July 30 unfilled.
Risks include accelerated backlog fulfillment and heightened data-center demand, which could boost cash flow and margins. However, project delays, labor shortages, or acquisition-related debt could stall the recovery. MasTec has demonstrated demand; the next test is generating cash.
