Saudi Aramco became the first company to exceed a $1 trillion market capitalization after an initial public offering in 2019.
When Saudi Aramco began trading in Riyadh in December 2019, its shares rose enough to value the company at approximately $1.88 trillion. The offering sold a relatively small portion of the company, while the Saudi government retained control through its majority ownership.
Saudi Aramco’s valuation reflected its enormous oil reserves, production capacity, refining network, and ability to generate dividends. It also reflected investor expectations about energy prices and the future demand for petroleum products.
This milestone is distinct from the question of which company first reached a trillion-dollar market cap overall: Apple achieved that earlier, in 2018, without an IPO occurring at that time. Market capitalization is simply the total value of listed shares, so a company can cross a threshold after listing without selling the whole business.