Alphabet Inc.’s Class A shares climbed to a record US$210 on Monday, lifting the Google parent’s market capitalization to about US$2.5 trillion. The surge makes Alphabet only the fifth company to cross the US$2.5 trillion threshold and extends a run of all-time highs for the stock this month. The advance pushed Alphabet past Amazon.com to become the world’s fourth-largest publicly traded company, narrowing the gap with Apple, whose valuation remains roughly 32 percent higher. The latest milestone underscores investors’ confidence in the search giant as it continues to widen its lead among the market’s biggest technology names.