Local filings showed Daniel Lurie spent more than $8.6 million of his own money to help fund his mayoral run against fellow Democrat and incumbent mayor London Breed.

Levi Strauss & Co. heir Daniel Lurie is set to become mayor of San Francisco after spending more than $8 million of his own money to position himself as a political outsider who could best tackle the city’s homelessness,

Ms. Breed said in a news conference at City Hall that she had called Daniel Lurie, an heir to the Levi Strauss fortune who has never held elected office, to congratulate him on his win. “Being mayor of San Francisco has been the greatest honor of my ...