Warren Buffett, Chairman and CEO of Berkshire Hathaway.David A. Grogan | CNBCWarren Buffett took control of Berkshire Hathaway in 1965, and nearly six decades later as the “Oracle of Omaha” turned 93 on Wednesday, his conglomerate is stronger today than it’s ever been.Berkshire shares have roared back to an all-time high on record operating profit, making it the biggest nontech company by market capitalization. Buffett has been extremely active in the past year, wooing his followers with a slew of astute moves from buying underappreciated Japanese stocks to navigating a surge in interest rates skillfully.”He’s still at the top of his game. His mental acuity is sharp as ever,” said David Kass, a finance professor at the University of Maryland’s Robert H. Smith School of Business, who once held private lunches for his students and Buffett.Loading chart…Buffett stood out as one of the only few investors who managed to take advantage of higher rates, thanks to his mountain of cash — $147 billion at the end of June. His massive cash pile, which had been an area of concern at times, is now earning him a substantial return with short-term rates topping 5%.Meanwhile, the legendary investor has been leaning on his favorite stock Apple, which has now taken up half of Berkshire’s equity portfolio after its 40% rally this year. Buffett likens the iPhone maker to a consumer products company and has said he is also attracted to its big buyback programs. His Apple bet has made Berkshire well over $100 billion since 2016.’Groundbreaking’ investmentBuffett also added to his stakes in five Japanese …
