From the same story,

" An important question, asked or not, is what will happen to Berkshire shares when Buffett steps down or dies. They may take a hit of perhaps 5% to 10%, as longtime holders cash out and investors worry that the Buffett magic will disappear. Buffett, though, has said he thinks the stock will go up on the day after his death as investors anticipate a value-enhancing corporate breakup.

There’s a case to be made for a breakup. It’s the world’s biggest conglomerate at a time when conglomerates have fallen out of favor, with the likes of General Electric and United Technologies having broken up in recent years. For all of Buffett’s investment acumen and business smarts, Berkshire stock is about even with the S&P 500 as measured by total return over the past 10 years and 20 years, Bloomberg calculations show. The stock has returned 12.4% annually over the past 10 years, against 12.5% for the S&P 500. Buffett has said that Berkshire needs to top it over time or investors should consider looking elsewhere.

All the massive outperformance came in Buffett’s first 40 years at the helm, when the company was smaller and Buffett had a particularly hot investment hand, scooping up big stakes in companies like Coca-Cola and American Express at cheap prices. Size, too, is an impediment to outsize returns.

Buffett hasn’t had a lot of new winners in the past decade. The company’s largest acquisition—the 2016 purchase of Precision Castparts for $33 billion—has been a bust. Buffett has had some misses in the stock market, selling a group of financial stocks including Wells Fargo and JPMorgan Chase in 2020 and 2021 at about half their current prices. Of course, Apple has been a huge win with Berkshire’s stake, now worth over $150 billion, compared with a cost of around $30 billion. But the iPhone giant is having a rough 2024, and its stock is down more than10% year to date."