Limbach Holdings (Nasdaq: LMB) reported first quarter 2026 results on May 5, 2026 — and the headline number that matters most is not revenue, which came in at $138.9 million (up 4.3% year-over-year). It is bookings: $209.1 million in Q1 2026 alone, producing a 1.5 times book-to-bill ratio. In the building systems business, a 1.5x book-to-bill means Limbach is contracting work 50 percent faster than it is recognising revenue — building future revenue faster than the current quarter can burn through it.

Management highlighted that bookings over the last two consecutive quarters totalled more than $434 million — a data point that CEO Michael McCann framed as evidence that demand is strengthening and revenue momentum will build as 2026 progresses. The company reaffirmed its full-year 2026 guidance: revenue of $730 million to $760 million, adjusted EBITDA of $90 million to $94 million, and Owner Direct Relationship (ODR) organic growth of 9 to 12 percent.

The Numbers That Tell the Story

• Revenue: $138.9 million, up 4.3% year-over-year. Organic revenue declined 13.4% as expected, reflecting weaker bookings from mid-2025 and normal seasonal patterns — the revenue impact of lower bookings flows through with a lag.

• Bookings: $209.1 million — a 1.5x book-to-bill ratio that is one of the strongest quarterly booking results in Limbach's recent history. Management emphasised this as the leading indicator for the business.

• ODR Revenue: $99.8 million, up 10.4% year-over-year, representing 71.9% of total revenue. The ODR segment — Limbach's direct-with-building-owner business model — continues to grow faster than the overall company, gradually increasing its share of total revenue.

• Adjusted EBITDA: $8.7 million, in line with guidance. The Pioneer Power acquisition is still pressuring near-term margins, though management expects improvement to begin in the back half of 2026.

• Net income: $4.4 million, or $0.36 per diluted share — down from $10.2 million or $0.85 per diluted share in Q1 2025, reflecting the Pioneer Power integration margin pressure.

• Adjusted EPS: $0.64, beating estimates by $0.43 — a significant beat that reflects the underlying business performing better than the GAAP figures suggest once acquisition-related costs are excluded.

Limbach Holdings Q1 2026 bookings of $209.1 million — a 1.5x book-to-bill ratio — with 27% of bookings from data centres and ODR revenue growing 10.4% to $99.8 million confirms the building systems company's owner-direct strategy is generating accelerating demand even as current-period revenue reflects the lag from weaker mid-2025 bookings.

Data Centres: 27% of Bookings and a $30M-Plus Project

The single most strategically important disclosure in Limbach's Q1 2026 results is the data centre booking composition. Management stated that 27 percent of Q1 bookings came from data centre work — approximately $56 million of the $209 million quarter. They also highlighted a new data centre project expected to exceed $30 million in contract value, confirming that Limbach is winning large-scale data centre HVAC and building systems projects alongside the broader commercial market.

For context: Limbach is not a $10 billion company like Trane or Comfort Systems. With full-year revenue guidance of $730 million to $760 million, a single data centre project exceeding $30 million represents roughly 4 percent of annual revenue — a meaningful concentration of revenue from a single project. The fact that management specifically highlighted this project reflects their confidence that data centre work is becoming a genuine platform capability for Limbach, not an opportunistic one-time win.

Pioneer Power Integration — The Near-Term Headwind

Limbach's acquisition of Pioneer Power — a power systems company — is the primary explanation for the margin pressure visible in Q1 2026 results. Organic revenue declined 13.4% because of both the Pioneer integration and the expected lag between stronger Q4/Q1 bookings and revenue recognition.

Management expects Pioneer integration to begin improving margins in the second half of 2026, with continued improvement over the next two to three years. For investors and industry observers, the Pioneer Power acquisition represents Limbach's expansion beyond pure HVAC and building systems into electrical power — a capability that is increasingly required in mission-critical environments where HVAC and power systems are interdependent.

The Tampa HQ Move — A 125th Anniversary Signal

Limbach also disclosed it is relocating its corporate headquarters to Tampa, Florida as part of its 125th anniversary year — maintaining a strong Pittsburgh presence where the company has deep roots since its 1901 founding. The move aligns headquarters with the location of the majority of senior leadership and nearly 40 percent of corporate staff. A ribbon-cutting ceremony was held on March 11, 2026 with a donation to Feeding Tampa Bay.

The Tampa move is administratively logical but symbolically significant: the company that was founded in Pittsburgh in 1901 is anchoring its future leadership in the Sunbelt, reflecting the broader population and economic gravity shift that is reshaping where commercial building systems demand is concentrated.

Frequently Asked Questions

What were Limbach Holdings Q1 2026 results?

Limbach reported Q1 2026 revenue of $138.9 million (up 4.3%), bookings of $209.1 million (1.5x book-to-bill), ODR revenue of $99.8 million (up 10.4%, 71.9% of total), adjusted EBITDA of $8.7 million, and adjusted EPS of $0.64. Full-year 2026 guidance was reaffirmed at $730M to $760M revenue and $90M to $94M adjusted EBITDA.

Why is Limbach's book-to-bill ratio significant?

A 1.5x book-to-bill means Limbach contracted $1.50 of new work for every $1.00 of revenue recognised — building future revenue faster than current-period delivery. Combined with $434 million in bookings over two consecutive quarters, the ratio indicates strengthening demand and a growing revenue backlog that management says will drive improving organic growth through 2026.

How much of Limbach's business is data centres?

Data centres represented 27% of Limbach's Q1 2026 bookings — approximately $56 million of the $209 million quarter. Management highlighted a new data centre project expected to exceed $30 million in contract value, confirming data centre work as a growing platform capability within Limbach's building systems portfolio.