GE Aerospace has decided that the cheapest way to fix the engine industry’s most persistent bottleneck is to buy it. On 8 September the company agreed to acquire Consolidated Precision Products, the Cleveland based castings group, for $11.75bn from private equity owners Warburg Pincus and Berkshire Partners. It is one of the largest deals GE Aerospace has struck since it became a standalone company, and it says a great deal about where the pressure in the aerospace supply chain now sits.

What GE is buying

CPP is not a household name, but it is a critical one. Founded in 1991 and built through a long run of acquisitions, the company employs roughly 6,600 people across more than 20 facilities and produces superalloy, titanium, aluminium, magnesium and steel castings for commercial and military aircraft, helicopters and industrial gas turbines. GE Aerospace has been a customer for more than 15 years, and the structural castings CPP pours are the sort of part that cannot be second sourced quickly. Qualifying a new foundry for a flight critical component takes years, not quarters.

That scarcity explains the price. GE is paying about 26 times CPP’s expected 2027 EBITDA on a standalone basis. Including the net synergies GE expects to extract, the multiple falls to roughly 18 times. Either figure is rich for a metal bashing business, and GE knows it. Larry Culp, the chief executive, framed the logic bluntly: investing in mission critical casting capacity is needed to support what he called strong simultaneous demand across commercial engines, the aftermarket and defence.

The financing is conservative by the standards of the price. GE will fund about $7bn in cash and raise new debt for the remainder, and it says the deal will be accretive to adjusted earnings per share and free cash flow in the first year after closing. Capital allocation plans, including buybacks and the dividend, are unchanged. Closing is expected in the second half of 2027, subject to regulatory approval, which gives competitors and customers a long window to adjust.

Why castings, and why now

For three years the story of the commercial engine market has been the same: order books that stretch to the end of the decade and output that cannot keep up. LEAP production for the Airbus A320neo and Boeing 737 MAX families has struggled to keep pace with airframer demand, and the aftermarket has been squeezed as airlines fly older engines longer while waiting for shop visit slots. Behind almost every missed rate sits a small number of forged and cast parts. Aviation Week described castings as perhaps the greatest chokepoint in aerospace, and few in the industry would argue.

GE’s answer has been to pour money into its suppliers rather than replace them. The company has spent heavily on capacity at its own plants and provided financing and engineering support to third parties through its FLIGHT DECK operating model. The CPP purchase changes the approach. Instead of coaxing more output from an independent, GE will own the foundry, decide where the capital goes and integrate casting design with engine design in a way that arms length contracts never allowed.

Culp offered three reasons for the deal in his call with analysts, and the first was simply the chance to invest in a mission critical commodity at the scale the market requires. That is an admission that private equity ownership, with its shorter horizons and appetite for leverage, was not going to build the furnaces GE needs. Warburg Pincus and Berkshire Partners have done well from CPP, but the next phase of expansion required a balance sheet and a time horizon that only an engine maker could bring.

The Howmet question

The most immediate loser on the day was Howmet Aerospace, whose shares closed down about 10 per cent. Howmet is the largest independent supplier of castings, blades and vanes for gas turbines, and GE is one of its most important customers. Investors read the CPP deal as a sign that GE intends to bring more of that spend in house over time.

John Plant, Howmet’s chief executive, was measured in response. Speaking on 9 September, he said GE’s stated intent was to develop CPP over a period of years and that Howmet should be fine with that. He also acknowledged that demand for engine parts is testing the company in many ways and that the scale of the capital expansion under way is a strain. Howmet has previously talked of doubling revenue over a three to five year horizon, and Plant said an updated outlook would follow in due course.

Plant’s calm is probably justified in the near term. GE cannot shift volume to CPP overnight, the qualification cycle for new castings is long, and demand is running so far ahead of supply that every qualified foundry will be full for years. The longer term picture is less comfortable. Jefferies described the transaction as an impactful move in the blades and vanes war games rather than an exercise in earnings accretion, and that framing is right. GE is buying negotiating power over its own cost base as much as it is buying capacity.

What it means for the wider market

Three consequences follow for airlines, lessors and the aftermarket.

First, vertical integration is back in fashion at the top of the engine industry. GE’s move signals that the era of outsourced everything, which defined aerospace manufacturing from the late 1990s onwards, has run its course when it comes to the hardest parts.

Second, independent suppliers face a strategic choice. Those with unique capabilities will command premium prices and may themselves become targets. Those competing on cost against an OEM owned foundry with guaranteed volume will find life harder. Expect more consolidation among mid sized casting and forging houses before CPP even changes hands.

Third, the aftermarket is unlikely to feel relief soon. Additional casting capacity takes years to commission, and with closing not expected until late 2027 the deal is about supporting demand towards the end of the decade rather than solving this winter’s shop visit backlog. Airlines managing engine availability on older CFM56 and GEnx fleets should plan on the basis that constraints persist through 2027.

Boston Warwick’s view

At $11.75bn, GE Aerospace has paid a full price for the right to stop worrying about castings. The multiple looks expensive against CPP’s current earnings and reasonable against the cost of a single year of missed LEAP deliveries. For an engine maker whose entire business model depends on shipping units today to earn aftermarket revenue for the next 25 years, that is a defensible trade.

The more interesting question is what the rest of the supply chain does next. When the biggest customer in the market becomes the owner of one of its largest suppliers, every other participant has to reassess where it stands. Howmet’s share price fall was the first answer. It will not be the last.