Facebook first exceeded a $1 trillion market capitalization in July 2021.
Facebook's parent company crossed the milestone on July 28, 2021, after a favorable court ruling helped lift its share price. The company was then still named Facebook; it changed its corporate name to Meta Platforms in October 2021.
Its valuation reflected the scale of Facebook, Instagram, Messenger, and WhatsApp, which together gave the company a huge global advertising network. Revenue was primarily generated from targeted digital advertising.
The milestone is often described using the name Meta, but Facebook was the company's official corporate name at the time. That distinction matters when matching a historical market-cap event to the correct name.