Stewart W. Bosley III

Stewart W. Bosley III died in mid-August 2025 of complications from an unidentified degenerative musculoskeletal disorder which had plagued him off and on for over a decade. Stewart played varsity baseball at Haverford, as well as varsity soccer and varsity baseball at Mt. Lebanon High School. He is survived by his parents, M. Ellen Bosley and Stewart W. Bosley Jr., his uncle, Eric Sedlak, his ex-wife, Carmen Bosley, and his childhood best friend, Aaron Ambrad.

After Stewart's parents divorced, Stewart was raised by Ellen, who worked for decades in the back office at a Pittsburgh hospital, and on school days spent mornings, late afternoons and dinners with his maternal grandparents, Rita and Bill Sedlak. Ellen took him on many day trips to show him the natural beauty of Pennsylvania's mountains and forests. When he was young, Stewart often spent weekends with his father in New York at the Dakota apartment of Roberta Flack, his father's then-partner. Stewart was particularly close to his grandfather, who, like his mother, attended every sporting and school event, and whose last words were "Tell Stewart I love him."

Stewart did "junior year abroad" at Claremont, spent a summer with Eric while tending bar in Tokyo, and began his career at Creative Artists Agency, living in Venice Beach, and meeting Hollywood luminaries as he delivered scripts and contracts. After several years modeling for Elite, he joined DLJ as an investment banker, earned his MBA at USC, then later joined the private client teams at Lehman Brothers, Credit Suisse, and UBS, where he was a Managing Director.

Outgoing and affable, with a hearty laugh, Stewart mingled easily in Los Angeles, Miami, New York and Ibiza not only with entertainers, tech entrepreneurs, Fortune 500 executives and the owners of privately-held businesses whose products are much more famous than they are, but also with waiters, delivery people, checkout clerks and frankly, everyone around him. He lived in Encino with a dramatic view of a valley behind the Santa Monica Mountains and close to the arid hills where he regularly hiked with his dogs.

Stewart remained close to Carmen as they jointly raised Pacha and Birdie, gentle pit bull mixes they had adopted. More recently, he adopted a lively Staffordshire terrier, Maxie. Animals were Stewart's passion, and he was kind and gentle with his own, while being vocal about mistreatment by individuals and institutions. He would be pleased if his friends and family made a donation in his memory to a local animal shelter or animal rights organization.

Friends and family are welcome at his memorial from 12:00 to 2:00 on Friday, October 10 at the Unitarian-Universalist Church, 1240 Washington Road, Mt. Lebanon.