Carlsberg's founder gave his brewery to a foundation after a feud with his son, who built a rival brewery beside it

J.C. Jacobsen founded the Carlsberg brewery at Valby outside Copenhagen in 1847 and named it after his son Carl. In 1875 he founded the Carlsberg Laboratory. In 1876 he created the Carlsberg Foundation and endowed it with shares in the brewery^†. Father and son fell out. In 1882 Carl opened his own brewery next door, first called Valby Brewery and then Ny Carlsberg; the father's plant became Gammel Carlsberg. They reconciled in 1886^†. When J.C. died in 1887 his will left the remaining brewery shares to the foundation, not to Carl, and required the foundation always to own at least 51%^†. Carl set up the New Carlsberg Foundation in 1902, and in 1906 the two breweries merged with Carl as chief executive^†. Carl founded the Ny Carlsberg Glyptotek museum in 1897 and died in 1914. In May 2007 the Danish foundation regulator reinterpreted the 51% rule as at least 25% of capital and 51% of votes, with A shares carrying 20 votes and B shares 2^†. The foundation still controls Carlsberg in 2026^†.