1901: The firm does the legal work for the merger of 15 separate steel companies to create United States Steel, which was then the largest company in history with a capitalized value of $1.4 billion – an astonishing 7% of the country's gross domestic product.

1905: Amid rapid expansion of the Bell telephone system, the firm does legal work for J.P. Morgan & Co. in its role as primary agent on a then-record $150 million bond issue for American Telephone & Telegraph Company. Advising on telephone-system offerings will be a big business for the firm for decades.

1905-1908: Stetson, as part of an elite American Bar Association committee, helps to write the first national code of legal ethics.

1909: Wardwell becomes a partner of the firm.