Taipei/Hong Kong CNN —Shares in Taiwan Semiconductor Manufacturing Company fell as much as 4% on Wednesday, after Warren Buffett’s Berkshire Hathaway disclosed that it had sold most of its holdings in the chip giant. Just months before, in November, the company held about 60 million American depository shares of TSMC worth $4.1 billion, according to an SEC filing. Berkshire Hathaway did not provide a reason for the sale and did not immediately respond to a CNN request for comment. Shares in TSMC, which accounts for an estimated 90% of the world’s super-advanced computer chips, ended Wednesday more than 3% lower. TSMC announced last year that it’s building a second semiconductor factory in Phoenix and increasing its investment there.

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