The firm headed by mega-investor Warren Buffett almost quadrupled its stake in Apple during the final three months of 2016, a shopping spree that helped propel the company's shares to all-time highs, including new record peaks on Wednesday.
Today, as Apple's stock price hit a record high, crossing over $135 a share, that stake is worth more than $7.7 billion.
It is believed that the initial investment in technological companies was the work of either Combs or Weschler both of whom are leading candidates to succeed as chief investment officer in Berkshire after Buffet.
The airline investments, meanwhile, suggest that Buffett has overcome his two-decade aversion to the sector after an unhappy - though, he has said, profitable - investment in US Air Group.
Deficit hawks care more about Warren Buffett's Berkshire Hathaway (BRK.A) (BRK.B) buying more shares of Apple (AAPL) than a potential border tax, TheStreet's Jim Cramer said on CNBC's "Squawk on the Street" on Wednesday morning.
The Apple purchases by Buffett's firm contrast starkly with Berkshire Hathaway's holdings as disclosed in the filings. Maybe at that point Buffett got a good deal, but fast forward to the final three months of 2016 - the time period when Buffett was most active in accumulating shares - the stock was trading at an average price-to-forward earnings ratio of 12.4, now above the five-year average.
Apple shares have climbed 42 percent in the last 12 months and notched a new all-time record of US$133.29 on Tuesday.
The increase in stake in Apple appears to be timed well. "It's quite possible that Warren woke up and began to understand the virtues of Apple that he had been neglecting or, like with Precision Castparts, Todd or Ted had an affinity for Apple that sparked interest from Warren". However their decisions are known to be influenced at times by Buffett. "More planes are traveling more full".
Monsanto and Sirius did not immediately respond to requests for comment. The firm's total stake in the iPhone maker stood at approximately $6.6 billion as of December 31.