Warren Buffett‘s Berkshire Hathaway Class A shares hit a major milestone on Wednesday, topping $500,000 for a record closing high.

Berkshire‘s Class A shares rose 1.3% on Wednesday to close at $504,400 a share, the first time the stock had ever closed above $500,000 and its fourth straight day of gains. Shares of the Omaha-based business have risen more than 11% this year, clearly outperforming the broader market.

The rise in the stock price pushed Berkshire’s market value to more than $730 billion, surpassing Meta Platforms in market value and becoming the only non-tech company among the top 10 U.S. listed companies by market capitalization.

Berkshire’s Class A shares, the group’s initial offering, skyrocketed in price over time, eventually becoming one of the most expensive single stocks on Wall Street. Buffett has said he would never split the Class A stock because he believes the high share price will hold and attract more quality-oriented long-term investors.

Still, in response to small investor demand for cheaper options, Berkshire issued convertible Class B shares in 1996 at one-thirtieth the price of the original Class A shares. This allows investors to buy shares in the company directly, rather than through unit trusts or mutual funds.

Berkshire’s Class B shares closed at $336.11 on Wednesday, up 12% this year.