Stuart S. Janney III is an American heir, lawyer, financier and horseman.
Stuart S. Janney III graduated from the Gilman School and the University of North Carolina at Chapel Hill. He later received his J.D. from the University of Maryland School of Law.
Janney was a Partner at Maryland the law firm Niles, Barton & Wilmer. He served as legislative assistant to Charles Mathias (1922–2010), special assistant to the United States Secretary of State and foreign policy assistant to U.S. Senator Howard Baker (born 1925).
Janney served as Managing Director of Alex. Brown & Sons from 1986 to 1994, the first investment bank in the United States founded in 1800 in Baltimore, Maryland, and Brown Advisory. He has served on the Boards of Directors of Superior Essex, one of the largest wire and cable manufacturers worldwide, the Graphic Controls Corporation, a medical product company as well as King Ranch, Identity Group, Pride Manufacturing Company, LLC and Keystone Foods Holdings, The Rouse Company.
Janney is Chairman of the Board of the Bessemer Trust, a wealth management and investment advisory firm for high-net-worth families.
Janney sits on the Board of Trustees of the Johns Hopkins University and the Maryland Zoological Society.
In 1988, Janney inherited the family stable and decided to move the breeding operation from Glyndon, Maryland to Claiborne Farm, where Seth W. Hancock (b. 1949) could take care of it.
Janney serves on the Boards of Trustees of the Keeneland Association, the New York Racing Association and The Jockey Club. In 2013, his horse Orb won the Kentucky Derby.
Janney is married to Lynn Janney. They have a son, Matt, and a daughter, Emily.