- On Thursday, IBM shares ended at $159.05 on New York Stock Exchange
- The stock had reached a high of $182.78 during February 16 trading
- Warren Buffett-led Berkshire Hathaway owns over 50 million IBM shares
Mr Buffett owned about 81 million shares of IBM at the end of 2016 and sold about a third in the first and second quarters of 2017, CNBC reported, citing Mr Buffett.
"I don't value IBM the same way that I did six years ago when I started buying ... I've revalued it somewhat downward," Mr Buffett told CNBC in an interview.
"IBM is a big strong company, but they've got big strong competitors, too," he said.
Berkshire Hathaway still owns more than 50 million shares of IBM and Mr Buffett said he has stopped selling.
In April, IBM reported a bigger-than-expected decline in revenue for the first time in five quarters due to weak demand in its IT services business.