The big question now is whether there are more milestones to come or whether Berkshire has sold all the shares it's going to sell.
One possible alternative endpoint is the 700 million low-cost shares Berkshire received in 2017 as part of its 2011 investment in BofA when it was struggling.
Another is, of course, zero shares. In recent years, Berkshire has completely eliminated its stakes in several companies, including Verizon, Taiwan Semiconductor, and Goldman Sachs.
We probably won't know the answer for sure until Berkshire discloses its end-of-year portfolio snapshot in a mid-February SEC filing.
But two "round" numbers, to push the definition a bit, suggest the selling may be over.
First, the stake is 9.99%, and you have to go to two decimal places to get a 9 at the beginning of the number. (I manually adjusted the Portfolio Tracker, which usually only goes to one decimal place.)
Second, Berkshire reports it owned exactly 775,000,000 shares as of yesterday.
As Barron's has noted, Warren Buffett appears to like numbers with lots of zeroes.
Berkshire has owned exactly 400,000,000 shares of Coca-Cola for years. And its most recent portfolio disclosure showed it had cut its Apple position to exactly 400,000,00 shares.
Of course, we don't know if Berkshire has continued to sell Apple shares, so it may or may not have remained a nice round number.
And there are plenty of other big Berkshire holdings that don't end with a lot of zeroes (and a few smaller holdings that do).
