> Apple chipmaker TSMC
> [three paragraphs of background on Buffet's opinion of Apple]
> first time Berkshire has bought stock in Apple’s chipmaker
> stake in Apple chipmaker TSMC
> Samsung has recently been upping its efforts to catch up in order to win back Apple business, and TSMC’s Apple revenue could potentially be cut in half if that happened.
> Both TSMC and Samsung are also working on US production of advanced chips suitable for Apple devices, something which the Cupertino company is likely to welcome.
Apple is TSMC's largest single customer, but they're only ~25% of their revenue. Is this an article about Berkshire Hathaway, TSMC, or Apple?