Days ahead of his expected announcement to run for mayor of San Francisco, Daniel Lurie filed campaign paperwork Thursday afternoon with the city’s Ethics Commission. 

The founder of the anti-poverty nonprofit Tipping Point, who is also an heir to the Levi Strauss fortune, is scheduled to deliver a speech Tuesday in which he will officially announce his campaign to challenge Mayor London Breed in the November 2024 election. Over the last several months, Lurie has been holding private gatherings since the spring to rally support for his candidacy.

An email sent earlier this month to close friends, family and supporters advised them to save the date for a special announcement on Sept. 26. The location of that event has still not been announced.

“As we move forward, I’m excited to share a new journey I’m embracing that aligns with our shared passion and commitment to San Francisco,” Lurie wrote to supporters. “While I can’t reveal all the details just yet, I would be grateful if you, your family and friends can join me at this special announcement.”

Lurie, 46, comes from a prominent San Francisco family that has ties to some of the city’s most powerful figures. His father, Rabbi Brian Lurie, was the executive director of the Jewish Community Federation, and his mother, Mimi Haas, inherited much of the Levi’s fortune after marrying the late philanthropist Peter Haas—the great-grandnephew of Levi Strauss—following her divorce from Brian Lurie. 

Polling suggests Breed could be vulnerable to a challenge in next year’s election, as more than three-quarters of residents feel San Francisco is going down the wrong track. Supervisor Ahsha Safaí has already filed papers to run and reported raising $149,000 in the first two months of his campaign.

An official for Lurie’s campaign declined comment when reached Thursday evening.