This from a past 2017 Motley Fool article, re splits:

fool.com - Key moments in berkshire hathaway stock history

"3. Reaching out to small investors with Class B shares
In 1996, Berkshire Hathaway created its Class B shares, giving the right to existing Class A shareholders to convert each share of Class A stock into 30 shares of Class B stock at will. The net impact was to give small investors a way to invest in Berkshire, which at the time commanded more than $30,000 per Class A share.

Buffett didn't want to make the move, but he did so in response to financial entrepreneurs who sought to create an alternative investment vehicle to make Berkshire accessible to those with modest amounts of capital. Rather than allowing outsiders to reap fees, Buffett instead made the move himself, potentially saving ordinary investors thousands of dollars in added costs over the years and creating a way for them to participate in Berkshire's amazing run.

4. Berkshire's one stock split
Similarly, Buffett was never a fan of stock splits, but exigent circumstances did make one prudent. In 2010, Berkshire did a 50-for-1 split of its Class B stock. That made the shares more accessible to shareholders in railroad giant Burlington Northern when Berkshire bought out the company. The move allowed more Burlington shareholders to retain interests in Berkshire stock rather than having to liquidate what would have been fractional shares. Now, Class A shares are convertible to 1,500 Class B shares, and the current Class B price around $165 per share is squarely within the range of where typical stocks in the market trade."

ciao