William H. Donaldson

William Henry Donaldson (born June 2, 1931 in Buffalo, New York) is a former chairman of the U.S. Securities and Exchange Commission (SEC). Donaldson attended both Yale University (B.A. 1953) and Harvard University (M.B.A. 1958). While he was a senior at Yale, he joined its Skull and Bones secret society [1]. Donaldson returned to Yale and founded the Yale School of Management where he served as dean and professor of management studies. He also served in the United States Marine Corps.

Donaldson founded Donaldson, Lufkin & Jenrette. He was Chairman of the Carnegie Endowment for International Peace from 1999 to 2003. In 2003 he was appointed Chairman and chief executive officer of the New York Stock Exchange and Chairman, President and CEO of Aetna.

On June 1, 2005, he announced he would step down as SEC chairman on June 30.

Chairmen of the United States Securities and Exchange Commission
Kennedy • Landis • Douglas • Frank • Eicher • Purcell • Caffrey • Hanrahan • McDonald • D Cook • Demmler • Armstrong • Gadsby • Cary • Cohen • Budge • Casey • B Cook • Garrett • Hills • Williams • Shad • Ruder • Breeden • Levitt • Pitt • Donaldson • Cox

Preceded by Harvey Pitt	Securities and Exchange Commission Chair 2003– 2005	Succeeded by Charles Christopher Cox