Compression is the least visible link in the American gas chain. Producers and pipeline operators do not usually own the engines that squeeze gas up to line pressure; they rent them, per horsepower per month, on contracts that run three to seven years, and the lessor handles maintenance. It is a rental business dressed as an energy business — which is why the second-quarter reports that landed between 4 and 11 August matter more than the gas price did.

Three fleets accelerated, two stalled

Kodiak Gas Services, the largest lessor of high-horsepower compression in the Permian Basin and now a builder of behind-the-meter power plants, posted record adjusted earnings before interest, taxes, depreciation and amortisation (EBITDA) of $216.8m, up 21.7%, on fleet utilisation of 98.2% and pricing up 4.5% to $23.80 per horsepower. It raised full-year EBITDA guidance to $830–860m and cut leverage to 3.1x net debt to EBITDA, a company low. Its power arm has secured roughly 1.8 gigawatts of generation capacity through 2030 and issued a limited notice to proceed on a sub-100-megawatt West Texas project for a hyperscale data-centre customer.

USA Compression Partners, which runs the industry's largest fleet by horsepower, grew revenue 36.8% to $342.1m, lifted average revenue per horsepower 7% to $22.84 and raised distributable cash flow to $125.3m from $89.9m, covering its distribution 1.65 times against 1.40 a year earlier. It held the payout flat, choosing deleveraging at 3.72x.

Natural Gas Services Group, the $465m Midland manufacturer-lessor and smallest name here, reported record 88.3% utilisation, rental revenue per horsepower-month of $28.06 — the highest in the group — and raised full-year EBITDA guidance to $103–108m from $92.5–97.5m after buying Flatrock Compression for $120m at 6.2x earnings.

The two largest by revenue diverged. Archrock, the biggest US contract compression operator, saw revenue fall 3.1% to $371.2m and operating income fall 53.7%, dragged by a 35% collapse in aftermarket parts and service as customers deferred maintenance. It narrowed 2026 EBITDA guidance to $865–885m from $865–915m, citing make-ready costs, lubricant inflation and incentive compensation rather than demand — and simultaneously signed a 665,000-horsepower, eight-year midstream contract and raised its dividend 10%. Enerflex, the Calgary equipment maker and international rental operator, missed revenue by 33% and earnings by 43% on project sequencing, with revenue down 7% — while booking a record $1.5bn backlog and cutting net leverage to 0.8x.

Verdict on the business: SPLIT. Operating momentum contradicts the sell-off at Kodiak, USA Compression and Natural Gas Services; it confirms it at Archrock and Enerflex.

The multiples went down while earnings went up

Against this desk's May readings, every trailing multiple has compressed: Archrock 21.8x to 17.8x earnings and 4.69x to 3.86x sales; Kodiak 79.7x to 69.6x; USA Compression 32.0x to 24.4x; Natural Gas Services 25.3x to 22.6x. Reported EBITDA rose across the board. That is price de-rating, not earnings de-rating.

The dispersion is wide. USA Compression trades at 5.66x trailing enterprise value to EBITDA against 10.14x for Archrock and 10.16x for Kodiak, with an 8.2% trailing free-cash-flow yield. Enerflex sits at 9.6x forward earnings and a 10.6% free-cash-flow yield, the cheapest in the group and the one with the visible execution problem. Natural Gas Services is at 17.9x forward but yields 0.59% of free cash, because growth is being funded with capital spending. Archrock's forward multiple of 19.0x sits above its 17.8x trailing — consensus 2026 earnings of $1.75 a share are below 2025's actual $1.84. Kodiak remains the most demanding at 28.1x forward and 69.6x trailing; its May equity raise priced at $71.00 against $61.26 on 11 August, and the 17-analyst average target of $61.11 is now level with spot.

Verdict on valuation: INCONCLUSIVE at the group level, CONFIRMS at Archrock — a shrinking top line on 10x EV/EBITDA with falling forward estimates is a justified de-rating.

Supply, basis and the common cost

One shared headwind runs through all five calls: lubricant-oil inflation tied to higher crude, which Kodiak sized at roughly $18m annualised and USA Compression at about $1m a month, with no pass-through clause. One shared tailwind: new engines are not coming. Caterpillar lead times run 195–200 weeks, Archrock is ordering into 2029, and Kodiak and USA Compression are each roughly half-contracted on 2027 deliveries — competing supply is years out. Meanwhile Permian Waha hub gas prices exited a 134-day negative stretch into positive territory in June as new takeaway pipelines started, and the Energy Information Administration puts Permian gas output at about 28 billion cubic feet a day in 2026 despite rig counts down roughly 20% year on year. Volumes are decelerating, not declining.

The tape only broke ranks after the prints: Archrock left its strongest uptrend reading on 7 August and Natural Gas Services turned outright negative on 6 August, leaving Kodiak the last name still in a rising trend. From 2026 highs the group is down between 15% and 27% — deeper than the month's move implies.

The setup

Where it stands — Three of five compression lessors raised or reaffirmed 2026 targets on record utilisation; the two largest by revenue shrank. Would confirm — Archrock third-quarter revenue returning to year-on-year growth and aftermarket services stabilising above $42m. Would invalidate — Fleet utilisation slipping below 95% at Kodiak or revenue per horsepower falling sequentially at any of the three fleet-growers. Watch next — Third-quarter results in early November, plus Kodiak's West Texas data-centre power start targeted for early 2027. Valuation — Group spans 5.66x to 10.16x trailing EV/EBITDA; Archrock's 19.0x forward earnings exceeds its 17.8x trailing.