Born in Zell, Bavaria, Germany on November 16, 1856, Stumpf immigrated to New York with his family in 1866 and was apprenticed to a shoemaker at age 12.
By 14, he had switched to the printing trade and by age 17 he had gone west to work as a type compositor for the St. Louis Post-Dispatch.
[1] Returning to New York “with broadened experience and undiminished ambition,” he became a master printer at Wynkoop & Hallenbeck, where he met Charles David Steurer.
In addition to overseeing the printing operations of The American Banker, Stumpf became its editor.
[2] The firm of Stumpf and Steurer acquired several publications, including Underwood's Bank Reporter in 1887, Bamberger's Legal Directory in 1889, and the Financial Examiner, also in 1889.