What were Warren Buffett and his colleagues at
up to with their $350 billion equity portfolio last quarter? Investors will find out very soon.
A regulatory filing expected Tuesday should lift the veil. Investors will be focused on whether Berkshire Hathaway (tickers: BRK/A, BRK/B) added to its stake in
Taiwan Semiconductor Manufacturing
), as well as whether the company continued to pare its longtime interest in