Airlines and the hyperscalers have one thing in common: They are desperate for turbines to power their jets and data centers. At the heart of this surging demand are a few companies that manufacture the highly specialized parts. Western production of these turbine blades and vanes is concentrated in four companies, according to a report from SemiAnalysis. They are publicly listed Howmet Aerospace, Berkshire Hathaway-owned Precision Castparts, private-equity-owned Consolidated Precision Products and DPC Holdings, the parent of U.K.-based Doncasters Group, which made its public-market debut in New York last month. Precision Castparts and Howmet have the biggest market shares. As…

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