SLB agreed to acquire Kelvion from Apollo funds, announced on 31 August at 10:50 UTC — Apollo's own copy states 06:50 AM ET, which fixes the conversion. Enterprise value is about $4.1 billion. Apollo completed its own purchase of Kelvion on 13 January 2026, at roughly €2 billion including debt.
Seven and a half months
That is the holding period. Roughly double the money, on an asset Apollo has barely had time to operate — no multi-year operational turnaround, no bolt-on programme of any length, no time for a capex cycle to land. The value change is a re-rating: cooling assets are being priced differently in August than they were in January, because data-centre thermal management became a scarce category in between. Almost none of it can be attributed to what Apollo did to the business.
What is being bought
Of the $4.1bn, about $3.4bn is cash for the equity and about $0.7bn is assumed debt — so "SLB pays $4.1bn" overstates the cheque by roughly 17%. And Kelvion is not a data-centre company. Data centres account for something like $1.2–1.3bn of roughly $2.3–2.4bn of revenue. The remainder is a legacy industrial heat-exchanger business, carved out of GEA in 2014, serving power, chemicals, refrigeration and marine. Buyers are paying an AI-adjacent multiple for a business that is about half conventional industrials.
What the common framing gets wrong
The "2 gigawatts" figure attached to Kelvion in coverage is cumulative cooling capacity delivered to date — a historical installed-base total. It is not power generation, not annual capacity and not a forward commitment, and it has been repeated as though it were all three. Second: this does not close until the first half of 2027, subject to regulatory approval. Nothing about SLB's revenue or Apollo's returns changes this year.
The signal
An asset doubling in seven months without operational change is the cleanest available read on how fast the market is re-rating the boring physical inputs to AI capacity. Heat exchangers are not a technology story. They became a scarcity story, and the price moved before anything about the equipment did.