After the Federal Reserve announced its latest interest-rate decision, financial markets sold off as the pace of future rate cuts appears that it will be slower than most had expected. During the sell-off, Warren Buffett-led Berkshire Hathaway bought shares of three stocks:

Warren Buffett's Berkshire Hathaway has added to its holdings of Occidental Petroleum and SiriusXM, sending shares of both companies higher Friday.

Berkshire Hathaway stock is up a stunning 26% this year, while Warren Buffett has been on a selling spree and now has $325 billion in cash.

Despite Buffett overseeing stakes in nearly four-dozen securities, the lion's share of Berkshire's invested assets have been put to work in seven top ideas.

After spending much of Q3 selling shares of various companies including BAC, Warren Buffet is back to taking major long positions.