Berkshire Hathaway Vice Chairman Ajit Jain sold $139 million of Berkshire stock on Monday, reducing his ownership in the company by more than 50%, a sale that could be viewed negatively by investors. Jain, a Berkshire vice chairman and head of the company’s large insurance operations, sold 200 Berkshire Class A shares at an average price of $695,418 on Monday, according to a Form 4 filing with the Securities and Exchange Commission late Wednesday. Jain sold the Berkshire stock near the recent peak of around $725,000 per class A share.