"I think it's devastating for IBM. IBM spent a lot of time trying to figure out what Warren really wanted. (They) felt what he really wanted was
Late Thursday, Buffett told CNBC about Berkshire Hathaway's sale of roughly a third of its stake in IBM in the first and second quarters.
Buffett, whose company owned about 81 million shares of IBM at the end of 2016, said he doesn't "value IBM the same way" he did six years ago when he started buying it.
"I've revalued it somewhat downward," Buffett told CNBC. "When it got above $180 we actually sold a reasonable amount of stock."
— CNBC's Becky Quick contributed to this report.