The British company gets most of its revenue from the smartphone market, in which it has a 99% share across Google's Android and Apple's iOS devices. Arm shares last closed at $54.08, compared with the IPO price of $51. Such growth would benefit SoftBank, which told investors ahead of the Arm IPO that it plans to remain the majority owner in the company it considers its crown jewel. But some brokerages, including HSBC, urged caution, saying Arm's shares could remain range-bound as uncertainty over a smartphone market recovery pressures earnings. At least 17 brokerages started covering Arm, with an average rating of "buy" and a median price target of $63.50.

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Persons: Dado Ruvic, Goldman Sachs, TD Cowen, Roshan Abraham, Savio D'Souza, Anil D'Silva, Shounak Organizations: REUTERS, Holdings, Wall Street, SoftBank, J.P.Morgan, British, Citi, Deutsche Bank, Rosenblatt Securities, Philadelphia Semiconductors, HSBC, Thomson Locations: brokerages, Philadelphia, Bengaluru