Here are some of the world's top billion-dollar companies (also called "unicorns" if privately held, or just mega-cap companies if public), based on market capitalization as of 2025:
Top Public Companies (Trillion-Dollar Range)
These are some of the largest in the world:
1. Apple (AAPL) – Over $2.7 trillion
2. Microsoft (MSFT) – Over $3 trillion
3. Saudi Aramco – Around $2 trillion (varies with oil prices)
4. Alphabet (GOOGL) – Over $1.8 trillion
5. Amazon (AMZN) – Around $1.7 trillion
6. Nvidia (NVDA) – Surpassing $2 trillion in early 2025
7. Meta (META) – Around $1.3 trillion
8. Berkshire Hathaway – Over $850 billion
Top Private Billion-Dollar Companies (Unicorns)
These companies are not yet public but have private valuations over $1 billion:
ByteDance (TikTok owner) – ~$250 billion
SpaceX – ~$180 billion
OpenAI – Estimated at $80–100 billion
Stripe – ~$50 billion
Shein – ~$60 billion
If you’re looking for a list by industry (tech, oil, automotive, etc.) or want to know which company leads in a specific count
ry, I can provide that too. Just let me know!