Micron Technology surpassed Meta Platforms and briefly Tesla in market value on Thursday, after the memory chipmaker's solid forecast extended its AI-driven ascent. The company's shares were last up 18.4 per cent at $1,236, giving it a market capitalization of $1.398 trillion, compared with Meta's $1.392 trillion and Tesla's $1.4 trillion. Micron's fourth-quarter revenue and profit forecasts on Wednesday helped reverse a recent slump, with the company disclosing its customers had committed $22 billion to lock in supplies of memory chips. The chip company topped $1 trillion in market value on May 26, following the entry of South Korea's Samsung Electronics into the club, as memory chipmakers benefit from investor appetite for beneficiaries of Big Tech's mega AI spending plans.