NVIDIA became the first company in history to reach a $4 trillion market cap in July 2025, marking the latest milestone in a journey that has redefined global markets. The trillion-dollar market cap era began in 2007, when PetroChina crossed the $1 trillion mark, followed by Saudi Aramco at $2 trillion in 2019. Apple set another benchmark at $3 trillion in 2022. From $1T to $4T, here’s a look at the four companies that made history and how their market caps have changed since reaching these peaks, with current values as of August 18, 2025.
