Stephen Mandel Jr

Stephen Mandel Jr. is an American hedge fund manager based in Connecticut, born in 1956, with an estimated net worth of ~$2.8B Wikidata. He built his wealth in finance and is identified in the data as a hedge fund manager Wikidata.

Business & SEC Activity

The available data identifies Mandel as a hedge fund manager, but it does not provide details on specific firms, holdings, or transactions Wikidata. Recent news items reference changes in positions in Booking Holdings and Boston Scientific, but the article bodies provided do not include enough detail to summarize beyond those headlines NewsAPI.

Philanthropy

The Mandel Foundation filed a 2024 Form 990 showing $961,914 in total assets, $117,327 in revenue, $70,320 in expenses, and $55,620 in grants paid ProPublica 990. A Form 990 is the annual tax return that private foundations and charities file with the IRS; it reports finances, assets, and grants. Earlier foundation records in the data show two other Mandel-related foundations with $0 grants paid and minimal reported assets ProPublica 990.

Political Activity

From 2024-03-27 to 2025-12-30, Mandel made 100 FEC-recorded contributions totaling $13,768,872.23 FEC. The largest recipients listed were SMP ($4.5M), HMP ($3.05M), FF PAC ($2.5M), MD PAC ($1.75M), and the DNC Services Corp / Democratic National Committee ($612,300), with $1,183,900 going to Democratic recipients and $12,584,972.23 to PACs/other FEC.

In the News

Recent articles in the data report that the Mandel Foundation gifted $125 million to Case Western Reserve University NewsAPI. Other headlines mention Mandel trimming a position in Booking Holdings and opening a new position in Boston Scientific, but no additional article text was provided NewsAPI.