SLB's $4.1bn acquisition of Kelvion from Apollo and Triton

On 31 August 2026, energy technology group SLB announced a definitive agreement to acquire 100% of Kelvion, a German-headquartered maker of industrial cooling systems, from funds managed by Apollo (which holds a majority stake) and funds advised by Triton (the minority holder). The deal values Kelvion at approximately $4.1bn, made up of roughly $3.4bn in cash plus SLB assuming about $0.7bn of Kelvion's existing debt.

The Parties

SLB (formerly Schlumberger) is a 100-year-old oilfield services group that has spent the last few years pivoting into "digital at scale" and data-centre infrastructure alongside its traditional energy business. Kelvion makes industrial cooling equipment, the kind of heat-exchange hardware that keeps data centres and factories from overheating, and had already become Apollo's fastest-growing portfolio bet in that space since Apollo's funds took control in January 2026.

Structure & Process

This is a straightforward private M&A sale (a negotiated purchase of a privately held company, as opposed to a public takeover bid, which targets a listed company's shareholders). Apollo and Triton simply sold their shares in Kelvion to a strategic buyer under a definitive agreement. There's no stock exchange, shareholder vote, or scheme of arrangement (a UK court-approved mechanism for takeovers) involved because Kelvion isn't publicly listed. The transaction still needs customary regulatory clearances (antitrust review in the relevant jurisdictions) before it can close.

The Financing Angle

No financing details were disclosed in the announcement. The release doesn't say whether SLB is funding the cash portion from its own balance sheet or new debt. What is unusual, is that rather than Apollo paying down Kelvion's debt before selling, SLB is taking on roughly $0.7bn of it directly as part of the consideration, which lowers the cash SLB needs to write a cheque for at signing.

Law and Finance Firms Involved:

Sidley Austin LLP is the named legal counsel on the transaction, with Paul, Weiss, Rifkind, Wharton LLP as the regulatory counsel. Guggenheim Securities, LLC are the lead financial advisers to Apollo and Kelvion, alongside UBS AG London Branch.

Why it matters

This is a bet on the AI data-centre buildout from an unexpected angle. Cooling, not chips or cloud computing. SLB's CEO explicitly framed the deal as being "the most significant infrastructure investment cycle in our lifetime," and the acquisition is expected to more than double SLB's revenue opportunity per gigawatt of data-centre capacity it helps build. For Apollo, it's also a fast, successful exit. The firm only took control of Kelvion in January 2026, so this is an eight-month hold, unusually quick for a private equity investment.

Real World Impact

Every time you stream a show, ask a chatbot a question, or scroll social media, you're relying on a data centre somewhere that generates enormous heat and needs constant cooling to avoid shutting down. This deal is about who controls that cooling technology as AI data centres multiply worldwide. It's also a small window into how much capital is chasing "AI infrastructure" right now and not just the chip and cloud deals, but unglamorous industrial kit like heat exchangers. There's no disclosed job-cut or price impact for consumers here (Kelvion's press materials talk about growth and expansion, not cost-cutting), but the deal is an example of how the AI investment boom is rippling into old-economy industrial manufacturing and, more speculatively, feeds into wider public debate about how much electricity and water data centres consume, and who pays for the infrastructure to cool them.