"I'm deliberately taking my net worth down," he told The Omaha World-Herald in 2013. "My thinking is, I'm not immortal, and I won't need it where I'm going."
"There is no such thing as growth stocks or value stocks as Wall Street generally portrays them, as contrasting asset classes. Growth is part of the value equation."
Trian has increased its stake to roughly 30 million shares, valued at more than $2.5 billion, according to people familiar with the matter. The firm plans to push for multiple board seats, they added.
BYD's backers, like Warren Buffett's Berkshire Hathaway, are happy with the company's booming success. "I have never helped do anything at Berkshire that was as good as BYD," Charlie Munger, Buffett's longtime business partner, said in February. "BYD is so much ahead of Tesla in China," he added.