SLB Pays $4.1 Billion for Kelvion to Bulk Up AI Data Center Cooling Bet, Targets $5 Billion Revenue Business by 2028
August 31, 2026 — M&A call following SLB's agreement to acquire thermal management specialist Kelvion
SLB is making its clearest bet yet that the physical infrastructure of AI is as investable as the chips themselves. The oilfield services giant announced an agreement to acquire Kelvion, a German thermal management and heat exchange technology provider, for approximately $3.4 billion in cash plus assumption of roughly $700 million in debt, a total enterprise value of about $4.1 billion. The deal, expected to close in the first half of 2027, values Kelvion at approximately 11 times estimated 2026 adjusted EBITDA before synergies and 8.5 times after synergies, according to CFO Stephane Biguet. The seller is Apollo Managed Funds, Kelvion's majority owner, alongside a minority stake held by funds advised by Triton.
A Fast-Growing Side Business Gets Real Scale
The headline new information here is just how big SLB's data center solutions business has quietly become, and how quickly. CEO Olivier Le Peuch disclosed that cumulative deliveries are expected to exceed 2 gigawatts globally by the end of 2026, with revenue compounding at over 90% annually between 2024 and 2026. The business is on track to exit 2027 at an annualized run rate above $2 billion. Layering in Kelvion, management laid out a specific 2028 target for the combined data center businesses: $4.5 billion to $5 billion in revenue and $700 million to $800 million in adjusted EBITDA, up from a 2026 pro forma base of just over $2 billion in revenue and roughly $300 million in EBITDA. That implies the combined unit needs to more than double in two years, a target management insists is largely underwritten by contracted volumes rather than market assumptions. Biguet was explicit on this point: "We are not just assuming taking a market growth. We are here doing it by customer and projects, and this is why we are pretty confident about the range for the combined business."
Bookings Momentum Is the Real Tell
The numbers investors should focus on are the bookings figures, which suggest demand is running well ahead of even the aggressive growth SLB has already delivered. Combined data center bookings for SLB and Kelvion rose more than 130% in the first half of 2026 versus the first half of 2025, producing a book-to-bill ratio of 1.8 times. Kelvion alone posted H1 2026 bookings of $1.5 billion, up 43% year-over-year. Biguet noted the conversion cycle is relatively short, with orders typically flowing into revenue within six to nine months, though the contracting structure is unusual: customers commit to large fixed-volume scopes upfront, with purchase orders and bookings released gradually as the contract executes.
Why Cooling, and Why Now
The strategic logic centers on rack density. Le Peuch pointed out that modern GPU racks are already pushing past 100 kilowatts, with next-generation chip architectures expected to approach 1,000 kilowatts, a tenfold increase that makes heat rejection a bottleneck for bringing new AI capacity online at all. Kelvion's data center segment, which includes heat exchangers, heat rejection and recovery equipment, and modular infrastructure, is expected to generate between $1.2 billion and $1.3 billion in revenue in 2026, more than half of the company's total and growing over 50% year-over-year. Management's framing was blunt: cooling technology has become "one of the fastest-growing markets in the build-out of AI infrastructure," and control over it is increasingly a precondition for hyperscalers to activate capacity at all, not just an efficiency lever.
Total Addressable Market Expands to $150 Billion
SLB now sizes its addressable opportunity at more than $150 billion by the end of the decade, representing over 20% of the broader data center market excluding IT and semiconductors, up from a narrower base tied purely to modular fabrication. Le Peuch said Kelvion "has the potential to more than double our revenue opportunity per gigawatt of delivered capacity," a metric that matters because it signals SLB is shifting from being a fabrication and logistics contractor toward capturing a larger share of wallet per data center build. Goldman Sachs analyst Alexa Bruno pressed management on how much of that TAM SLB can realistically capture; Le Peuch did not offer a specific share but pointed to the 2028 targets as evidence of accelerating market share momentum.
Synergies Are Modest and Front-Loaded on Cost, Not Revenue
SLB is guiding to $120 million in annual EBITDA synergies within three years of closing, with about 60% realized by year two. Of that, $70 million comes from cost savings, procurement, manufacturing optimization, G&A, and in-sourcing, while only $50 million is attributed to revenue synergies from cross-selling Kelvion's technology into SLB's customer base and expanding geographically into Asia and the Middle East. Biguet was candid that this is a conservative placeholder: "We do try to be a bit conservative on revenue synergies as we start the integration process because they unfold a bit later." Notably, management explicitly excluded the value of co-engineering cooling directly into modular designs from the synergy target altogether, calling it too difficult to quantify today, which suggests the $120 million figure could prove light if the integration goes well.
Margins Are a Drag, at Least for Now
Kelvion's profitability profile is below SLB's corporate average, a point TD Cowen's Marc Bianchi pushed on directly. Biguet did not sugarcoat it, acknowledging the acquired business "is not accretive to the overall SLB business" on margins today, though he emphasized the capital-light model, with capital expenditures running at just 2% to 3% of revenue, generates attractive free cash flow and returns on capital employed even at lower margins. Management's stated intention is to lift the margin profile over time through deeper system integration and engineering value-add, but offered no explicit timeline or target beyond directional language.
Non-Data Center Business Is a Wildcard
Roughly 45% of Kelvion's revenue sits outside data centers, in heat pumps, renewables, carbon capture, and industrial processing. Management set no formal growth targets for this segment and was noticeably vaguer here than on the data center story, with Le Peuch saying only that SLB intends "to better understand how to position it and to be in a position to grow it going forward." This is worth flagging as the murkiest part of the deal: investors are effectively underwriting a call option on cross-application of Kelvion's technology into SLB's carbon capture and geothermal businesses without much specificity on size or timing.
Balance Sheet and Capital Returns Held Steady
SLB is funding the deal with existing cash and debt, and Biguet confirmed leverage will rise but stay within the company's full-cycle target of up to 1.5 times net debt to EBITDA, preserving its investment-grade rating. Critically, the acquisition does not touch shareholder returns: SLB reaffirmed its commitment to more than $4 billion in total returns for 2026 and set a $4 billion floor for 2027, with a firmer number to come during annual planning. Data center investments, including Kelvion's, are expected to be self-funded by the segment's own cash flows rather than drawing capital away from SLB's core divisions.
On competitive exposure, Le Peuch downplayed customer concentration risk, noting Kelvion's book spans multiple end markets and competitors rather than a single customer base tied to any one hyperscaler, which he argued insulates the business from single-point-of-failure risk as SLB integrates it.