Google's parent company Alphabet has achieved a US$1 trillion market value, the fourth US company to hit the milestone.
The search-engine giant joins Apple, Amazon and Microsoft as the only firms to achieve such a feat.
Alphabet hit the US$1t mark just before markets closed on Thursday (US time), and ended the day at US$1,451.70 per share.
The Wall Street Journal reports Alphabet shares have surged since early December when the company announced Google co-founders Larry Page and Sergey Brin were stepping down from managing the parent company.
Apple and Amazon both surpassed the trillion-dollar threshold in 2018, while Microsoft achieved the feat in April last year.