Shares of Warren Buffett's Berkshire Hathaway are on track for another record. The company's Class B shares are up nearly 17% this year, compared with a 3.7% decline in the S&P 500. If the shares end the day higher,

Berkshire Hathaway stock notched a fresh high on Thursday, as it races past the S&P 500 this year. Berkshire’s Class A stock was up 0.6% at $794,347 just before noon Eastern, a new record based on available data since Sept.