Warren Buffett, while speaking no CNBC, says he's a buyer of IBM shares, but not an "aggressive" one. The famed investor noted that his cost basis for the position is a "little less" than $170 per share.

The tech giant closed Friday down $1.12 to $145.95. Buffett added that he's never sold a share of IBM. He said he's more likely to add to the position than cut it over the next two years.