tapebrief
FIX · Q3 2025

FIX · Q4 2025 Earnings

Bullish

Comfort Systems USA

Reported February 19, 2026

30-second summary

30-second take: Revenue grew 41.6% YoY to $2.65B in Q4 with GAAP EPS of $9.37 and operating margin of 16.1% (+60bps QoQ), capping a $9.1B full year (+29.5%) with $1.04B of FCF. Backlog effectively doubled to $11.94B (+99.7% YoY) and same-store backlog hit $11.58B (+93.3% YoY) — accelerating again off the +62% Q3 print on a stiffer comp. The bigger break: after years of refusing to anchor a number, management put concrete framing on 2026 — mid-teen to high-teen same-store revenue growth weighted to H1, gross margins persisting in current ranges, modular capacity scaling to 4M sq ft, and a ~23% tax rate.

Headline numbers

EPS

Q4 FY2025

$9.37

Revenue

Q4 FY2025

$2.65B

+41.6% YoY

Gross margin

Q4 FY2025

25.5%

Free cash flow

Q4 FY2025

$0.40B

Operating margin

Q4 FY2025

16.1%

Key financials

Q4 FY2025
MetricQ4 FY2025YoYQ3 FY2025QoQ
Revenue$2.65B+41.6%$2.45B+8.0%
EPS$9.37—$8.25+13.6%
Gross margin25.5%—24.8%+70bps
Operating margin16.1%—15.5%+60bps
Free cash flow$0.40B—$0.52B-22.4%

Guidance

Company provided initial FY2026 guidance anchored on mid-teen to high-teen same-store revenue growth with strong margin persistence and ~23% tax rate; prior quarter offered only qualitative optimism.

Guidance is issued for the full year only, refreshed each quarter. Prior and new below are the same FY updated this quarter.

New guidance

MetricPeriodGuideYoY
Same-store revenue growthFY 2026mid-teen to high-teen percentagesmid-teen to high-teen % YoY
Gross profit marginFY 2026continue in strong ranges; seasonably lower in Q1—
Tax rateFY 2026around 23%—
Modular capacityFY 2026approximately 4 million square feet by end of 2026—

Other KPIs

Q4 FY2025
SegmentQ4 FY2025YoY
Backlog$11.94B+99.7%
Same-store Backlog$11.58B+93.3%
Adjusted EBITDA$463.963 million—
Adjusted EBITDA Margin17.5%—
Operating Cash Flow$468.540 million—
Backlog$11.94 billion—
Same-store Backlog Growth$5.59 billion YoY increase—
Number of Locations190 locations in 142 cities—

Management tone

Narrative arc: Q2 "backlog surge" → Q3 "unprecedented demand" → Q4 "putting numbers on 2026 + reframing backlog as late-cycle."

Backlog redefined from leading to late-cycle. For three quarters running, management let backlog growth speak for itself as forward visibility. This quarter Brian Lane explicitly reframed it: "if we put something into backlog, it means that we have a legal, a binding legal commitment, a price and a scope...we're really working on things that came up, you know, one to two and a half years ago...we will see whatever commitments they're making now we'll see that in 27 28 in our revenue." The shift matters because it tells analysts the $11.9B isn't reflecting recent hyperscaler announcements — those will show up later. Backlog is confirming what's already underway, with the next wave still ahead.

The historical no-guide posture broke. Q2's brief noted FIX "does not issue quantitative revenue or EPS guidance." Q3 escalated to "optimistic about Q4 and 2026." Q4 finally put boundaries on it: mid-to-high teens same-store growth, ~23% tax rate, modular capacity at 4M sq ft, gross margins holding in "strong ranges." For a company that has built a brand on under-promising, putting four anchors on a single year is a meaningful signal that the visibility supports it — but the explicit "tough revenue comparables" and H1-weighted phrasing also tells you management sees the deceleration coming.

Labor reframed from constraint to managed-via-platform. Q2 framed labor as the binding constraint with 20,000+ employees plus an internal staffing arm. Q3 added the "high single-digit sustainable rate" admission. This quarter Trent McKenna explicitly named the contract workforce platforms — Kodiak and Pivot — as a strategic capability giving local leaders flexibility to take on remote or peaked work that would otherwise be declined. Labor isn't gone as a risk, but it's now described as a managed asset rather than a project-selection ceiling.

Pricing philosophy made explicit — and unusual. Lane's "the spreadsheet's no good if the people aren't there" anchors a pricing posture that deprioritizes labor-hour optimization in favor of workforce retention. Few industrial CEOs say in print that they don't price primarily on gross profit per hour worked. The corollary is that FIX believes it has enough pricing power that protecting people is the binding constraint, not customer pushback.

Modular reframed from incremental to transformational. Q2's modular discussion was about capacity growth from 2.7M to 3M sq ft and a 4%→12% multi-year mix progression. Q4: 18% of revenue, 50%+ of Q4 bookings, $30M of robotics per facility, and modular bookings as the primary driver extending backlog duration into 2027–2028. Management is now describing modular as the lever that extends visibility, not as an incremental revenue stream.

Recurring themes management leaned on this quarter:

Record backlog ($11.9B, 93% YoY growth same-store) as late-cycle indicator of 2027-2028 revenueTechnology/data center dominance (45% of 2025 revenue, 67% of industrial/tech mix)Modular expansion as backlog duration extender (18% of revenue, 50%+ of Q4 bookings)Margin expansion momentum (gross margin 25.5% Q4, 24.1% FY, electrical 26.7%)Labor strategy pivot to contract workforce model (Kodiak/Pivot) enabling geographic flexibilityDisciplined pricing power prioritizing workforce retention over spreadsheet optimization

Risks management surfaced:

Workforce sourcing constraints despite 7,000+ hires in 24 monthsFirst quarter seasonality headwind on marginsRevenue comparables steepening in H2 2026Modular capacity ramp timing (gradual productivity through 2026)Execution risk on $2.6B sequential bookings realization

Q&A highlights

Josh Chang · UBS

Does management feel subsidiaries understand the discipline around not overcommitting to jobs, and is there pushback to take on more work than comfortable?

Management remains very disciplined with detailed labor projections, current and future work assessments, and supervision planning. No subsidiaries are overcommitting; they can handle all backlog while maintaining profitability, productivity, and safety.

Detailed process for job acquisition includes labor projections, current work assessment, future work timing, and supervision planningCurrent position allows handling all backlog while maintaining profitability and productivity

Brian Brophy · FIFO

What is the impact of next-generation chip cooling requirement changes (45-degree water) on the business, and how is management thinking about capital deployment given strong cash generation exceeding M&A deployment capacity?

Cooling requirement changes have minimal impact as 45-degree water is not naturally occurring 99% of the time/places, so electricians and pipe fitters will still be needed. On capital deployment: M&A pipeline is good, company spent couple hundred million on share buybacks, increased dividend twice (50% increase), and will maintain high conviction on acquisitions rather than deploying excess cash indiscriminately.

Couple hundred million dollars spent on share buybacks in past yearTwo consecutive 10-cent dividend increases representing ~50% total increaseWill not accumulate unprecedented cash levels relative to company sizeHistorical precedent: had more cash proportionately during financial crisis which enabled acquiring great companies today

Sanjita Zeng · KeyBank

With longer backlog duration and supply chain/tariff uncertainties, how is management contracting differently to protect returns on work delivered years out (e.g., 2028)? Also, what drove the decision to expand modular capacity from 3 to 4 million square feet?

Contract pricing is protected through early equipment purchase releases with customer commitments; labor costs rely on management's expertise in knowing they must take care of employees long-term. Legal team has improved contract protection significantly. Modular expansion is primarily driven by demand from two largest hyperscaler customers who would buy more if capacity allowed; new facilities are planned for these two customers.

Equipment purchases released early and sometimes before work enters backlogLabor remains primary cost and risk with no multi-year price locksLegal team manages contract terms to protect against long-duration job risksModular expansion targets two largest hyperscaler customers

Answers to last quarter's watch list

Same-store backlog comp math. Same-store backlog hit $11.58B (+93.3% YoY) — accelerating from Q3's +62% on a $5.99B prior-year base. Absolute level held well above $9B sequentially ($9.20B → $11.58B, +26% sequential). No peak; the comp got harder and the print got bigger again.
Resolved positively
Free cash flow normalization vs. net income. Q4 FCF was $403M vs. $331M net income — Q4 alone exceeded net income on conversion, validating the management framework. FY FCF $1.04B closed the YTD gap entirely.
Resolved positively
Technology mix disclosure. Management restated the number: advanced technology was 45% of FY 2025 revenue, up from 33% a year ago. Above the 45% threshold the Q3 watch flagged as concentration-material. The print confirms single-vertical exposure has crystallized; management chose not to frame it as a risk. Status: Resolved negatively on concentration risk; resolved positively on absolute trajectory.
October acquisitions' margin profile. Q4 gross margin actually expanded to 25.5% from Q3's 24.8% — no compression from the $200M of October-acquired revenue folding in.
Resolved positively
Healthcare end-market disclosure. Healthcare was not called out with a specific share or backlog figure in the Q4 release commentary; the conversation pivoted to technology/data center dominance.
Not resolved
Net cash deployment cadence. The release commentary doesn't show a clean Q4 net cash figure, but the capital-allocation discussion in Q&A (couple hundred million in buybacks, dividend hikes, M&A continuing) and Lane's refusal to "accumulate unprecedented cash" suggest deployment is keeping pace with generation.
Continue monitoring
2026 framing. This is the headline resolution: management broke from the historical no-guide posture with mid-to-high teens same-store growth, ~23% tax rate, modular capacity at 4M sq ft, and gross margin persistence in current ranges. Quantitative anchors arrived.
Resolved positively

What to watch into next quarter

H1 vs H2 same-store growth split. Management said growth will be "weighed more heavily to the first half" because comparables steepen. Watch Q1 same-store revenue growth — a print in the high teens or above would validate the front-loading; a mid-teen print would imply the deceleration is starting earlier than guided.

Modular capacity ramp pace. From ~3M sq ft entering 2026 to ~4M by year-end — a ~33% step. Watch quarterly progression and whether modular's revenue share moves above 20% (from 18% FY 2025).

Q1 gross margin seasonality. Management explicitly flagged margins will be "seasonably lower in the first quarter." Watch whether Q1 gross margin holds above 23% (the Q2 2025 reading), or compresses materially — the latter would imply pricing power is softening rather than just seasonal.

Technology mix at FY 2026. 45% in FY 2025. A print above 50% would mean data-center hyperscaler concentration is increasing every quarter; a print holding at 45% would imply the rest of the business is keeping pace.

New modular customer additions. Jain's Q&A surfaced that new modular capacity is being built for the two largest existing hyperscaler customers with "few new customers added and none at scale." Watch for any disclosure that a third hyperscaler enters the modular customer set — would meaningfully de-risk concentration.

Backlog burn rate. With $11.94B of backlog against $9.10B of FY revenue, backlog is now ~1.3x trailing revenue. Watch whether the in-year burn-down portion of backlog grows at a pace consistent with mid-to-high teens same-store growth, or whether the curve keeps extending into 2027–2028.

Sources

  1. Comfort Systems USA Q4 2025 press release, filed via SEC EDGAR — https://www.sec.gov/Archives/edgar/data/1035983/000110465926017529/fix-20260219xex99d1.htm
  2. Comfort Systems USA Q4 2025 earnings call — Q&A exchanges (UBS, Stifel, KeyBank) and prepared remarks (Brian Lane, CEO; Bill George, CFO; Trent McKenna, COO)

Get the next brief, free.

We publish analyst-grade earnings briefs the same day or morning after every call — headline numbers, segment KPIs, Q&A highlights, and tone analysis. Free during beta.

This is not investment advice.