Joseph Tsai

Joseph Tsai (born 1964) is a Canada-linked billionaire with an estimated net worth of ~$9.5B. SEC filings under “Tsai Joseph C” show ownership-reporting activity connected to Alibaba Group Holding Ltd and other entities, including Weibo Corp and SoftBank Group Corp. Wikidata SEC EDGAR

Business & SEC Activity

SEC EDGAR lists 9 total filings for “Tsai Joseph C” (personal CIK 0001633999), all of which are Schedule 13G/13G-A filings from 2015 through 2023. Schedule 13G filings are beneficial ownership reports used to disclose large shareholdings in public companies, and the “/A” versions are amendments updating prior disclosures. The filings reference companies including Alibaba Group Holding Ltd, Weibo Corp (WB), AutoNavi Holdings Ltd, SoftBank Group Corp, and Ali ET Investment Holding Ltd. SEC EDGAR

Philanthropy

ProPublica-reported 2023 Form 990 data shows two California-based foundations—Tsai Family Foundation (Los Altos Hills, CA) and Chock Tsai Foundation (Saratoga, CA)—with combined total assets of 180,409 and total grants paid of $0 in 2023. Tsai Family Foundation reported assets of 105,629, revenue of 30,101, expenses of 14,825, and grants paid of $0 for tax year 2023; Chock Tsai Foundation reported assets of 74,780, revenue of 21,064, expenses of 6,012, and grants paid of $0 for tax year 2023. An additional entity, Austin Chen Tsai Foundation (San Jose, CA), is listed with $0 assets/revenue/expenses and $0 grants paid. ProPublica 990

Political Activity

FEC data shows 85 contributions totaling $10,365.78 from 2004-10-05 to 2025-10-03. The party breakdown reported is $3,977.76 to Democrats, $1,800.00 to Republicans, $800.00 to unknown/other, and $3,788.02 to PAC/Other. Top recipients by amount include DJOU FOR HAWAII ($1,550), ACTBLUE ($1,396.52), WARNOCK FOR GEORGIA ($1,000), JON OSSOFF FOR SENATE ($1,000), and AMERICAN COLLEGE OF RADIOLOGY ASSOCIATION ($1,000). FEC