• David Koch and his brother Charles Koch have donated billions to an extensive network of conservative sources.
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Billionaire conservative donor and industrialist David Koch has died, family sources have told New Yorker reporter Jane Meyer.

Meyer tweeted Friday morning that she had been told Koch had died.

Koch, 79, and his brother Charles, are among the most influential figures in the conservative movement in the US in recent years, having donated billions to a network of conservative organisations.

In 2018, David Koch retired from his roles at Koch Industries because of ill health.

A representative for Koch Industries did not immediately respond to Business Insider's request for comment.

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