Starr Insurance Companies announced that John Patin, senior investment officer, has resigned his position for personal reasons. John F. Shannon, formerly with Alleghany Corp., was named to succeed him. Shannon served as senior vice president and chief investment officer at Alleghany, which Berkshire Hathaway acquired in October 2022.

Prior to Alleghany, Mr. Shannon spent more than 11 years at MetLife Investments as vice president, global portfolio management, following five years at Prudential Financial as an investment analyst. He is a chartered financial analyst and holds a Bachelor of Science degree from University at Buffalo and an MBA from New York University's Stern School of Business. Mr. Shannon is based at Starr's New York headquarters.