David Koch, billionaire conservative activist and philanthropist, dies at 79 NBC NewsBillionaire David Koch, Who Used His Wealth to Reshape U.S. Politics, Dies at 79 The Wall Street JournalDavid Koch, billionaire businessman and influential GOP donor, dies CNNDavid Koch, billionaire philanthropist and prolific GOP donor, dead at 79 Fox NewsBillionaire conservative philanthropist David Koch dies at 79 | TheHill The HillView full coverage on Google News