FARNBOROUGH, England--Boeing Co. (BA) and General Electric Co. (GE) have signed a preliminary commitment for 100 737 aircraft worth up to $9.25 billion. GE Capital Aviation Services will add 25 current generation 737s and 75 updated 737 Max aircraft to its portfolio. Norman Liu, GECAS chief executive, said the first 737 Max jets will be delivered in 2018. The agreement was signed at the Farnborough International Air Show and confirms a Saturday report by the Wall Street Journal of the company's intent to buy the aircraft. GECAS joins lessor Air Lease Corp. (AL) here at the show announcing plans to acquire the new single-aisle plane. At list value the 737 Max and current generation 737 aircraft are worth $7.1 billion and $2.11 billion, respectively, says Boeing. Mr. Liu added that the majority of the 75 737 Max jets would be mostly for the Max -8 model and a smaller portion for the larger Max -9 aircraft. Write to Jon Ostrower at jon.ostrower@wsj.com