Buffett is donating Berkshire Hathaway shares to four family foundations as part of a charitable pledge.
Berkshire cut its holdings in the iPhone maker by roughly 25% in the third quarter.
Analysts don't expect the losses will lead to further consumer rate increases.
Warren Buffett has offered no public explanation for his decision to pull back on the stock.
The bank warned employees that trips to this year's Olympic city will be closely monitored.
The move would end public ownership of a firm that in one form or another has been listed since 1838.
After decades in public markets, the Rothschild dynasty — one of the most storied names in banking — has decided its flagship bank is best in private hands. Rothschild & Co...
The Swiss financial giant has changed its entire executive team and half its board of directors in the past 18 months.