Aigen Investment Management LP reduced its stake in Watsco, Inc. (NYSE: WSO) by 55.9% in the fourth quarter, as disclosed to the SEC. Following the sale of 635 shares, the institutional investor now holds 500 shares of the construction company. This information highlights significant changes in investment strategies among institutional investors. Access to the full article is restricted to Insider Pro subscribers, who can log in or register for more insights on this and related financial news.