[1][2][3] He emigrated to the United States at the age of one,[3] settling in New York City, where his father was a businessman.

[2] With his half-brother David Lubin,[2] he opened a drygoods store in San Francisco, California, in 1872.

[2][5] He also served on the executive committee of the National Civic Federation, which attempted to alleviate conflict between employers and labor unions.

[7] In 1912, Weinstock was appointed by Governor Hiram Johnson to investigate the San diego free speech fight.

[2][3] Weinstock fell from his horse while riding near Los Altos, California, in August 1922.

[3] He died of a skull fracture at the nearby hospital in Palo Alto, California on August 22.