A smartphone with a displayed Arm logo is placed on a computer motherboard in this illustration taken March 6, 2023. REUTERS/Dado Ruvic/Illustration/File Photo Acquire Licensing Rights Sept 14 (Reuters) - SoftBank Group (9984.T) CEO Masayoshi Son was in San Francisco on Wednesday when he joined a call with his bankers in New York to make a final decision about his company's most valuable asset: chip designer Arm Holdings (ARM.O). Arm's blockbuster initial public offering (IPO) was oversubscribed by 12 times, and could have been priced at $52 per share, above the indicated range of $47 to $51, people familiar with...