There's also a companion document with information and analytics on the quarter and a guidance summary to assist in future 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 release, our slides, and companion documents. Today, I'll be reviewing our second quarter results as well as providing my outlook for the markets we serve. Backlog at quarter end was $21.4 billion, a nearly $5 billion year-over-year increase and $1 billion sequential organic increase, a new record level.
Revenue, EBITDA, and EPS were all above guidance with strong year-over-year double-digit growth. EBITDA margins improved 100 basis points versus last year's second quarter, and total company book-to-bill was over 1.2x, setting yet another backlog record. 2026 is on track to be a record year, and the recent acquisition of The Superior Group only adds to the momentum we are building as we look ahead to 2027 and beyond. We had the chance to provide more detail around the opportunities for each of our business segments and set longer-term financial targets, including specific 2028 organic targets.
In fact, during the second quarter, we have seen a meaningful increase in large project pursuits. To reiterate, we are seeing unprecedented demand across our business, and we expect that to translate into further continued strong backlog growth. Also since Investor Day, we've now closed on the largest acquisition in our history. We believe this acquisition enhances our capabilities, deepens our customer relationships, expands our highly skilled workforce, and broadens our addressable market.