There's also a companion document with information and analytics on the quarter and a guidance summary to assist in financial modeling. A reconciliation of any non-GAAP financial measures not reconciled in these comments to the most comparable GAAP financial measures can be found in our earnings press release slides or companion documents. Revenue for the quarter was just shy of $4 billion, a 22% year-over-year increase. Adjusted EBITDA was $374 million, a 20% year-over-year increase, and this growth performance was the highest level since the first quarter of 2024.
Adjusted earnings per share was $2.48, ahead of consensus by nearly $0.20. Despite a revenue record quarter, backlog at quarter end was $16.8 billion, a roughly $325 million sequential increase, with every segment delivering backlog growth. In summary, we exceeded guidance across each of our revenue, EBITDA, and EPS metrics, representing a strong period of execution for MasTec. Our communications segment grew revenues 33% year-over-year, and EBITDA increased 38%, all organic.
EBITDA margins for the segment improved 40 basis points compared to last year's third quarter. Our clean energy and infrastructure segment grew revenue by 20% year-over-year, and EBITDA improved 36%, virtually all organic. EBITDA margins for the segment improved 100 basis points compared to last year. Our power delivery segment grew revenues 17% year-over-year, and EBITDA increased 21%, all organic.