F. William McNabb III, commonly known as Bill McNabb, is an American financial executive renowned for his leadership at The Vanguard Group, one of the world's largest investment management companies. Born in 1957, McNabb earned a Bachelor of Arts from Harvard College in 1979 (Source A) and also graduated from Yale University with a Bachelor of Arts in Economics in 1981 (Source B). He holds a Master of Business Administration from the University of Chicago Booth School of Business, earned in 1983 (Source A) or 1986 (Source B). McNabb joined Vanguard in 1986 as an assistant to the chairman and progressively advanced through senior roles, including chief investment officer from 1995 to 2008. He assumed the position of president in 2006 (Source A) or 2008 (Source B), became chief executive officer in 2008 (Source A) or from 2009 to 2017 (Source B), and was appointed chairman in 2009 (Source A) or from 2010 to 2018 (Source B). During his tenure as CEO and chairman until his retirement in 2018, McNabb oversaw significant growth for Vanguard, emphasizing low-cost index investing, expanding assets under management to over $5 trillion, and reinforcing the firm's client-focused, passive investment philosophy pioneered by founder John C. Bogle. Post-retirement, McNabb has continued to influence the financial and technology sectors through board directorships, including serving as an independent director on the board of Check Point Software Technologies since 2018. He has also been involved in advisory roles and philanthropy, including service on the board of the United States Naval Academy and contributions to financial education initiatives. Throughout his career, he has advocated for regulatory reforms to protect investors and has been a vocal proponent of long-term, low-fee investment strategies. His professional network includes key figures in finance and technology, such as Gil Shwed of Check Point, reflecting his ongoing influence in investment and cybersecurity sectors.