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Here is a short look at the 10 largest companies by market capitalization as of Saturday, Oct. 18, 2025. Additionally, I have included the percentages of their gains on a year-to-date basis. Let's dive into the numbers.

1. Nvidia (NVDA) has a market cap of around $4.45 trillion, with year-to-date gains of approximately +36.4%
2. Microsoft (MSFT) has a market cap of around $3.82 trillion, with year-to-date gains of approximately +21.9%
3. Apple (AAPL) has a market cap of around $3.74 trillion, with year-to-date gains of approximately +0.8%
4. Alphabet (GOOG) has a market cap of around $3.07 trillion, with year-to-date gains of approximately +33.8%
5. Amazon (AMZN) has a market cap of around $2.27 trillion, with year-to-date gains of approximately -2.9%
6. Meta (META) has a market cap of around $1.80 trillion, with year-to-date gains of approximately +22.4%
7. Broadcom (AVGO) has a market cap of around $1.65 trillion, with year-to-date gains of approximately +50.7%
8. Taiwan Semiconductor Manufacturing (TSM) has a market cap of around $1.53 trillion, with year-to-date gains of approximately +49.4%
9. Tesla (TSLA) has a market cap of around $1.46 trillion, with year-to-date gains of approximately +8.8%
10. Berkshire Hathaway (BRK-B) has a market cap of around $1.06 trillion, with year-to-date gains of approximately +8.4%

In comparison, the S&P 500's year-to-date gain is approximately +13.3%.

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