Sergey Brin and 11 other billionaires and tech elite lined up against California's proposed billionaire tax

• A handful of California’s estimated 214 billionaires are trying to stop a proposed wealth tax.
• Google cofounder Sergey Brin, who moved assets out of the state, has spent $82 million.
• Here are those joining him, including Peter Thiel, ex-Google CEO Eric Schmidt, and DoorDash CEO Tony Xu.

“Our job is to get Gavin to negotiate this so that it doesn’t get to the ballot,” Conway told Jack Altman during an episode of Altman’s “Untapped” podcast.

Conway has donated $100,000 to Stop the Squeeze, a political group that is outright opposing the proposed tax.

Altman publicly thanked Conway for helping aid his return to the AI startup following Altman’s brief ouster in 2023.

It’s unclear what Conway’s net worth is. He was an early investor in Airbnb and GitHub, among other companies.

Daniel Tierny

Daniel Tierny cofounded the Global Electronic Trading Company (GETCO) in the 1990s after cutting his teeth as an options trader in Chicago.

Now, Tierny leads Wicklow Capital, a family office venture firm he founded in 2013 that focuses on investments in “ABCD,” AI, blockchain, climate, and democracy.

Tierny has donated $500,000 to Building a Better California. He is one of 10 people to have donated to the group.

It’s unclear what Tierny’s net worth is.