- Janus Henderson Group is a leading global active asset manager dedicated to helping clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world-class service. As of March 31, 2026, Janus Henderson had approximately US$480 billion in assets under management, more than 2,000 employees, and offices in 26 cities worldwide. The firm helps millions of people globally invest in a brighter future together. Headquartered in London, Janus Henderson is listed on the New York Stock Exchange.