FIX · Q2 2025 Earnings

Bullish

Comfort Systems USA

Reported July 24, 2025

30-second summary

30-second take: Revenue grew 20.1% YoY to $2.17B with GAAP EPS of $6.53 and operating margin of 13.8%, but the print's real signal is backlog: total backlog of $8.12B (+41% YoY reported) and same-store backlog of $7.93B (+37% YoY, from $5.77B), with management saying a "substantial portion" extends into 2027 and beyond. Technology is now 40% of revenue, up from 31% a year ago, and capacity — not demand — is the binding constraint. This is a company turning down work, not chasing it.

Headline numbers

EPS

Q2 FY2025

$6.53

Revenue

Q2 FY2025

$2.17B

+20.1% YoY

Gross margin

Q2 FY2025

23.5%

Free cash flow

Q2 FY2025

$0.22B

Operating margin

Q2 FY2025

13.8%

Key financials

Q2 FY2025

Metric	Q2 FY2025	YoY
Revenue	$2.17B	+20.1%
EPS	$6.53	—
Gross margin	23.5%	—
Operating margin	13.8%	—
Free cash flow	$0.22B	—

Guidance

Prior quarter data unavailable — comparison not possible.

Segment KPIs

Q2 FY2025

Segment	Q2 FY2025	YoY
Backlog (same-store basis)	$7.93B	+37.5%

Other KPIs

Q2 FY2025

Segment	Q2 FY2025
Total Backlog	$8.12 billion
Same-Store Backlog Growth	37.5%
Operating Margin	13.8%
Adjusted EBITDA	$334.1 million
Adjusted EBITDA Margin	15.4%
Operating Cash Flow	$252.5 million
Free Cash Flow	$222.2 million

Management tone

The posture across the prepared remarks and seven separate analyst Q&A exchanges is consistent and worth noting in its own right:

Management speaks like a company that has more demand than it can absorb. Asked about modular capacity, McKenna (COO) framed expansion as "incremental" with a focus on "improving productivity and automation in our existing spaces" — a third modular location is "not a high priority" despite a 37% same-store backlog surge. Companies pursuing growth opportunistically do not pass on geographic expansion at this kind of demand inflection.

On competition, the framing is unusually direct: McKenna said the goal is to be so good at modular that a customer would be crazy to buy it from anyone else. Asked about new modular entrants, management acknowledged customers are "encouraging" competitive capacity development but that the best companies in the world have tried with mixed results. This is a tone of incumbency, not defensiveness.

On bonus depreciation and the AI executive order — which sell-side often expects management to flag as catalysts — Comfort Systems explicitly downplayed both. Lane said he "would not view that as an important driver for us at a time when we're already experiencing demand that far outstrips what we could possibly do." Few industrial companies refuse a tailwind narrative when one is handed to them.

Q&A highlights

Brent Thielman · D.A. Davidson & Company

Asked about manufacturing vs. technology customer focus, whether manufacturing pipeline has subsided, and modular's proportion of backlog and capacity expansion plans

Manufacturing pipeline remains strong but technology presents better opportunities currently; operating companies are selecting best projects. Modular should stay near mid-teens growth rate aligned with overall company growth. Capacity additions serve both new customer opportunities and existing customer growth.

Manufacturing still strong but tech presents more opportunitiesModular expected to grow at mid-teens rate, similar to overall company growthCompany has grown modular from 4% to 6% to 8% to 10% to 12% of revenue over time2.7 million sq ft current modular capacity, ~3 million expected by early 2026

Adam Thalhammer · Thompson Davis

Asked what portion of current backlog is scheduled for 2027 and beyond; queried Walker Electrical's geographic concentration and pricing dynamics with technology customers

Significant portion of backlog extends beyond 2025-2026; backlog is 'pushing farther out' supporting mid-teens growth. Walker Electrical operates across four major Texas markets (Dallas, Houston, Austin, San Antonio) with strength across all four. Pricing is strong across the board and technology customers are good partners on innovation.

Substantial portion of backlog scheduled for 2027+Walker Electrical: all work in Texas, four major markets equally strongGross margins at 23.5%Technology customers paying well and partnering on innovation

Sanjita Jain · KeyBank Capital Markets

Asked about modular capacity expansion strategy, third location plans, and impact of tax reform (bonus depreciation and AI executive order) on customer demand

Expanding modular incrementally while focusing on productivity and automation in existing spaces; third location not high priority currently given good location coverage (mid-Atlantic and Houston). Bonus depreciation helps but not viewed as important demand driver given current demand exceeds capacity.

Modular expansion focused on incremental capacity and productivity improvementsTwo locations (mid-Atlantic and Houston) well-positioned for current marketsThird location consideration on long-term basis, not high priorityBonus depreciation helping customers but not viewed as key demand driver

Josh Chan · UBS

Asked about workforce capacity and willingness to expand work; recruiting challenges; project selection approach across verticals given technology focus

Workforce engaged and company positioned as employer of choice in markets; using internal staffing company for flexibility and multi-company collaboration on projects. Selecting best projects available in their markets; technology red-hot but maintaining diversity across end markets. Key differentiator is being best operators available.

Internal staffing company enables labor flexibilityMulti-company collaboration on large projectsTechnology is 40% of revenue, up from 31% prior yearMaintaining balance across industries while serving tech demand

Brian Brophy · Stifel

Asked about competitive dynamics in modular space and new entrants; competitive position; healthcare market strength beyond tech

Customers encouraging competitive capacity development with mixed results; goal is to be so good competitors aren't viable option. Healthcare seeing new hospital construction particularly in South/Florida, expansion projects, and surgical center growth; consistent strength over 12+ months.

Healthcare growing with new-build hospitals (heavy in South/Florida)Surgical centers and outpatient facilities expandingHealthcare strength consistent for over a yearCompetitive modular entrants not gaining significant traction

What to watch into next quarter

Technology revenue concentration: at 40% of revenue (up from 31% YoY), watch whether this stabilizes near 40% or continues climbing. A move above 45% materially raises single-vertical exposure.

Modular capacity utilization and gross margin: capacity moves from 2.7M to ~3M sq ft by early 2026. Watch whether modular-driven gross margin holds the current 23.5% level as new capacity ramps and absorption shifts.

Backlog conversion timing: management says a "substantial portion" of the $8.12B backlog is scheduled for 2027+. Watch whether the in-year (next-12-month) burn-down portion of backlog grows at a pace consistent with mid-teens revenue growth, or whether the curve is back-loaded enough to constrain near-term revenue acceleration.

Same-store backlog growth deceleration: +37% same-store is an extreme reading. Watch whether this prints positive in Q3 (sustained large-project bookings) or compresses sharply as comps stiffen — directional change matters more than the absolute level.

Healthcare backlog disclosure: management flagged healthcare as a second growth engine consistently strong for 12+ months. Watch for a specific disclosed end-market share or backlog figure to validate this as a true second leg.

Labor capacity commentary: company has 20,000+ employees and is using an internal staffing arm. Watch for any shift in tone on recruiting/retention if backlog continues to outrun capacity adds.

Rightway Plumbing contribution: watch for first-quarter contribution from the Florida plumbing acquisition ($60–70M annualized revenue) and any signal on follow-on M&A appetite given the net cash position.

Sources

Comfort Systems USA Q2 2025 press release, filed via SEC EDGAR — https://www.sec.gov/Archives/edgar/data/1035983/000155837025009535/fix-20250724xex99d1.htm
Comfort Systems USA Q2 2025 earnings call — prepared remarks (Brian Lane, CEO; Bill George, CFO; Trent McKenna, COO) and Q&A (KeyBank, Sidoti, D.A. Davidson, Thompson Davis, UBS, Stifel, North Coast)

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