Arm Holdings reported record-breaking results in its fourth quarter, achieving over $1 billion in revenue for the first time in its history. Despite surpassing sales expectations, the company issued a disappointing outlook for the first quarter, citing uncertainties in licensing deals and ongoing global trade tensions. This cautious guidance led to a decline in Arm's stock price, which fell by 8% in after-hours trading. The company’s diversification beyond smartphones was noted, but investor concerns over the weaker forecast contributed to the shares slumping.