Alternative fuel provider Clean Energy Fuels (NASDAQ: CLNE) reported Q2 CY2026 results exceeding the market’s revenue expectations, with sales up 3.7% year on year to $106.4 million. Its non-GAAP loss of $0.01 per share was in line with analysts’ consensus estimates.

Is now the time to buy Clean Energy Fuels? Find out by accessing our full research report, it’s free.

Company Overview

Operating the largest network of natural gas fueling stations in North America with over 600 locations, Clean Energy Fuels (NASDAQ: CLNE) supplies renewable natural gas and conventional natural gas as fuel for commercial vehicle fleets.

Revenue Growth

Cyclical industries such as Energy can make mediocre companies look great for a time, but a long-term view reveals which businesses can actually withstand and adapt to changing conditions. Thankfully, Clean Energy Fuels’s 14.6% annualized revenue growth over the last five years was solid. Its growth beat the average energy upstream and integrated energy company and shows its offerings resonate with customers.

Within Energy, a singular timeframe, even if it’s quite long-term, only sheds light on how well a company rode the last commodity cycle. To better assess whether a company compounds through cycles, we validate our view with an even longer, ten-year view. Clean Energy Fuels’s annualized revenue growth of 0.6% over the last ten years is below its five-year trend, but we still think the results were respectable.

This quarter, Clean Energy Fuels reported modest year-on-year revenue growth of 3.7% but beat Wall Street’s estimates by 1.2%.

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Adjusted EBITDA Margin

Adjusted EBITDA margin is an important measure of profitability for the sector and accounts for the gross margins and operating costs mentioned previously. Unlike operating margin, it is not distorted by accounting conventions around reserves, drilling costs, and assumptions on commodity consumption from the well or basin. Adjusted EBITDA highlights the economic reality of how much cash the rock produces before the capital structure (debt service) and the drilling budget (capex) are considered.

Clean Energy Fuels was profitable over the last five years but held back by its large cost base. Its average EBITDA margin of 14.5% was among the worst in the energy upstream and integrated energy sector.

On the plus side, Clean Energy Fuels’s EBITDA margin rose by 2.4 percentage points over the last year.

This quarter, Clean Energy Fuels generated an EBITDA margin profit margin of 15%, down 2 percentage points year on year. This contraction shows it was less efficient because its expenses grew faster than its revenue. This adjusted EBITDA fell short of Wall Street’s estimates.

Cash Is King

Adjusted EBITDA shows how profitable a company’s existing wells are before financing and reinvestment decisions, but free cash flow shows how much value remains after paying the cost of replacing those wells. In upstream energy, production naturally declines over time, so companies must continuously reinvest just to stand still. A producer can report strong EBITDA margins yet generate little or no free cash flow if its wells decline quickly or if new drilling is expensive. Free cash flow therefore captures not only how efficiently a company produces hydrocarbons today, but also how costly it is to sustain that production into the future.

Clean Energy Fuels has shown poor cash profitability relative to peers over the last five years, giving the company fewer opportunities to return capital to shareholders. Its free cash flow margin averaged 1.1%, below what we’d expect for an upstream and integrated energy business.

While the level of free cash flow margins is important, their consistency matters just as much.

Clean Energy Fuels’s ratio of quarterly free cash flow volatility to WTI crude price volatility over the past five years was 91.1 (lower is better), indicating that its cash generation is far more sensitive to commodity-price swings than most peers. This elevated volatility limits its access to capital in downturns and makes it unlikely to act as a consolidator when weaker competitors come under pressure.

You may be asking why we wait until the free cash flow line to perform this stability analysis versus commodity prices. Why not compare revenue or EBITDA to WTI Crude prices in the case of Clean Energy Fuels? Because what ultimately matters is not how much revenue or profit you earn when prices are high but how much cash you can generate when prices are low. Free cash flow is the superior metric because it includes everything from hedging prowess to growth and maintenance capex to management behavior during good times and bad.

Key Takeaways from Clean Energy Fuels’s Q2 Results

It was good to see Clean Energy Fuels narrowly top analysts’ revenue expectations this quarter. On the other hand, its EBITDA missed. Overall, this was a weaker quarter. The stock remained flat at $1.85 immediately following the results.

Big picture, is Clean Energy Fuels a buy here and now? If you’re making that decision, you should consider the bigger picture of valuation, business qualities, as well as the latest earnings. We cover that in our actionable full research report which you can read here (it’s free).