Berkshire Hathaway, the investment company owned by Warren Buffett, has sold 1.55 million Hong Kong-listed shares of electric vehicle maker BYD for HK$351.81 million ($44.85 million), a stock exchange filing showed.

The sale lowered Berkshire’s holdings in BYD’s H-shares to 12.9 percent on Jan. 27, down from 13.04 percent, the filing with the Hong Kong Stock Exchange showed on Thursday.

Berkshire, which started selling the BYD shares in late August, has accumulatively reduced its holding by more than a third.

Buffett’s company acquired 225 million BYD shares in 2008, giving it a 7.73 percent stake, equal to the 20.49 percent stake in H shares, according to BYD’s annual report.

BYD was the world’s largest plug-in hybrids and pure electric vehicles maker in 2022, with a total of 1.86 million cars sold, growing faster than Tesla.