Peter Bub was born in Germersburg, Bavaria. He emigrated to America in 1862 and some time thereafter took an opportunity in the Ph. Best Brewery in Milwaukee, Wisconsin.

In 1869 Jacob Weisbrod hired Bub away to be foreman in his newly expanded brewery under Sugar Loaf rock in Winona, Minnesota. The 27-year-old rose to the occasion and when two years later Weisbrod died of typhoid fever Bub took over the brewery, and later, married Weisbrod's widow Margaret. The very next year the Weisbrod Brewery burned down and uninsured losses forced Bub to look for a backer. In a testament to the reputation Peter Bub had cultivated in his three short years in Winona he immediately found a willing partner in local hotelier John Burmeister. Bub renamed the firm the Sugar Loaf Brewery and the state of the art manufactory soon turned a profit. Within two years Bub bought out Burmeister's share, then ran the Sugar Loaf as sole proprietor for the next 35 years.

Peter Bub died at age 69 on December 22, 1911. His brewery continued into Prohibition as a bottling plant manufacturing root beer but was closed for Volstead Act violations in 1931. The company was resurrected upon Repeal as the Peter Bub Brewery and was run by various managers until it was shuttered in 1969. Their flagship brand, Bub's Lager Beer, was sold to the Walter Brewery of Eau Claire, Wisconsin, who continued the brew until the early 1980s.

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