Berkshire Hathaway (BRK-A, BRK-B) is on track to be the next trillion-dollar company by market capitalization, according to Markets Reporter Paul La Monica, who joins Yahoo Finance to discuss Berkshire's rise. La Monica says Apple (AAPL) is "by far the biggest stock" in Berkshire's portfolio, boosting the company's gains. However, he notes Berkshire is more than just Apple, it's a "giant industrial conglomerate" with ownership stakes across many sectors. This diverse investment portfolio of stocks, insurance, and utilities has enabled Berkshire to build its $860 billion market valuation. For more expert insight and the latest market action, click here to watch this full episode of Yahoo Finance Live. Editor's note: This article was written by Angel Smith