Diane Hendricks is an American billionaire entrepreneur who co-founded the supply company ABC Supply with her husband, the late Ken Hendricks. 1 She is a major supporter of President Donald Trump and the Trump administration, having donated $25 million, her largest single donation, to the Trump-affiliated Make America Great Again Inc. (MAGA Inc.) in July 2026. 2
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Forbes estimated Hendricks’s net worth at $21.7 billion as of August 2026. 3
In 1982, Diane Hendricks co-founded ABC Supply with her late husband Ken Hendricks. The company is headquartered in Beloit, Wisconsin and claims to be the largest distributor of roofing and both interior and exterior building materials in the United States. As of 2026, the company reportedly operated in over 840 locations with over 20,000 employees and a reported revenue of over $20 billion. 1 4
Forbes estimated Hendricks’s net worth at $21.7 billion as of August 2026. 3
Hendricks is a major financial supporter of President Donald Trump and the Trump administration. In 2024, Hendricks donated $12 million to the Make America Great Again (MAGA) super PAC and another $5 million in 2023. 5 In 2026, Hendricks donated $25 million to MAGA Inc., tying Miriam Adelson for the largest single contribution to the PAC and breaking her own record for her largest single political donation ever. 2
Hendricks has also donated to the Wisconsin Truth PAC, with previous 2022 election cycle donations to the PAC reaching $19 million. In 2015, Hendricks donated $5 million to the right-of-center Unintimidated PAC and during the 2016 election cycle, Hendricks donated over $7.5 million to the right-of-center Reform America Fund. Between 2014 and 2016, Hendricks donated $5 million to the Freedom Partners Action Fund. In 2020 she donated $4 million to the America First Action PAC and in 2024, she donated $11 million to the right-of-center Turnout for America PAC. 5
In addition to donations to political action committees, Hendricks has donated directly to federal and state-level political parties including the Republican Party of Wisconsin (RPW), the National Republican Congressional Committee (NRCC), the Republican National Committee (RNC), and the National Republican Senatorial Committee (NRSC). 5
Hendricks donated over $4.5 million to the RPW between 2016 and 2022, making it the political party to receive the most donations from Hendricks. 5 She gave over $3.1 million to the RNC between 2016 and 2024. 5 She gave an additional nearly $1.5 million to the NRCC between 2017 and 2023. 5 She also gave just over $1.1 million to the NRSC between 2018 and 2024. 5