Chuck Rubin and Ken Griffin

Chuck Rubin and Ken Griffin have built very different careers within the American business world. Chuck Rubin is known for senior leadership in retail, including CEO roles at Ulta Beauty and The Michaels Companies, while Ken Griffin built his reputation in investment management and financial markets as the founder and CEO of Citadel. Their education, executive careers, areas of expertise and publicly reported financial information provide a useful side-by-side look at two prominent American business figures.

Chuck Rubin and Ken Griffin Quick Bio

Information	Chuck Rubin	Ken Griffin
Full Name	Carl “Chuck” Rubin	Kenneth C. Griffin
Date of Birth	Approximately 1959 — exact date unverified	October 15, 1968
Net Worth	Not publicly confirmed — estimated/unverified	Approximately $58.6 billion — estimated
Age	Approximately 66–67 years	57 years
Birthplace	United States — exact location unverified	Daytona Beach, Florida, USA
Nationality	American	American
Profession	Business executive, retail leader, corporate director and advisor	Investor, hedge fund manager, entrepreneur and philanthropist
Famous For	Former CEO and Chairman of The Michaels Companies; former President and CEO of Ulta Beauty	Founder and CEO of Citadel; Founder and Non-Executive Chairman of Citadel Securities
Height	Approximately 5 ft 10 in (1.78 m) — estimated	Approximately 5 ft 10 in (1.78 m) — estimated
Weight	Approximately 75–80 kg — estimated	Approximately 75–80 kg — estimated
Nickname	Chuck	Ken
Parents	Not reliably documented publicly	Father worked as a General Electric project manager connected with NASA’s space program; detailed information about his mother is limited
Siblings	Not reliably documented publicly	Not reliably documented publicly
Education	Bachelor’s degree from Brandeis University	A.B. with Honors in Economics from Harvard College, 1989
Hair Color	Gray/white — estimated	Brown/gray — estimated
Eye Color	Not reliably documented — unverified	Not reliably documented — unverified
Hobbies & Interests	Not widely documented publicly	Art collecting, finance, technology and philanthropy
Marital Status	Private; current details not reliably documented	Divorced
Children	Private family information	Three children
Early Career	Retail management, merchandising and consulting	Began investing while studying at Harvard
Accenture Career	Worked in senior leadership and became a partner	Not associated with Accenture
Office Depot Career	Held senior executive positions, including President of North American Retail	Not associated with Office Depot
Ulta Beauty Career	Joined as COO in 2010 and later became President and CEO	Not associated with Ulta Beauty
Michaels Career	Became CEO in 2013 and Chairman in 2015; left the CEO role in 2019	Not associated with Michaels
Citadel Career	Not associated with Citadel	Founded Citadel in 1990 and remains Founder and CEO
Citadel Securities	Not associated with Citadel Securities	Founded Citadel Securities in 2002 and serves as Non-Executive Chairman
Current Professional Focus	Retail advisory and corporate leadership	Investment management, financial markets, corporate leadership and philanthropy
Major Career Field	Retail and consumer businesses	Hedge funds, market making and financial services
Author	No major book publicly documented	No major book publicly documented
Philanthropy	Some involvement through business and community activities	Major philanthropic activities involving education, science, healthcare and the arts
Instagram	No widely verified personal account identified	No widely verified personal account identified
Family Information	Personal family details largely private	Three children; other personal family details largely private
Career Background	Federated Department Stores, Accenture, Office Depot, Ulta Beauty and Michaels	Financial markets, Citadel and Citadel Securities
Financial Information	Exact current net worth not publicly established	Estimated at approximately $58.6 billion