John Catsimatidis

John Catsimatidis is a New York-based American billionaire with an estimated net worth of ~$4.8 billion. He is identified as an energy-industry figure, radio talk show host, and politician; the available data does not specify how he built his wealth. Wikidata

Business & SEC Activity

SEC records list John A. Catsimatidis as an officer or insider connected to root9B Technologies, Inc., a company with no ticker shown in the records. The database lists 10 insider filings from 2007 to 2016, including Forms 3, 4, and 4/A: Form 3 reports initial insider ownership, Form 4 reports changes in ownership, and Form 4/A amends a prior filing. SEC EDGAR

Philanthropy

The John and Margo Catsimatidis Foundation Inc. reported $406,333 in grants paid, $35,862 in total assets, $885,343 in revenue, and $406,858 in expenses for tax year 2023. ProPublica 990

Political Activity

The available FEC data covers only the most recent 100 contributions and indicates at least 100 federal contributions; the sample total is $628,869.53, not a complete lifetime total. In this sample, contributions were $319,269.53 to Republican recipients, $500 to Democratic recipients, and $309,100 to PACs or other committees; the largest named recipients were the Republican National Committee ($150,000), Grow the Majority ($100,000), and the NRCC ($31,300). FEC

In the News

Two validated articles dated June 21–22, 2026, discussed public social-media activity involving Catsimatidis family members and a photograph posted by Donald Trump. The articles identified Andrea Catsimatidis as Manhattan Republican Party chairwoman and discussed speculation about the identity of a woman in the photograph. NewsAPI