1 FIRST AMENDMENT TO RIGHTS AGREEMENT THIS AMENDMENT (this "Amendment"), dated as of July 30, 2001 to the Rights Agreement, dated as of July 26, 2001 (the "Rights Agreement"), by and between Kerr-McGee Holdco, Inc., a Delaware corporation (the...Rights Agreement • August 1st, 2001 • Kerr McGee Holdco Inc • Crude petroleum & natural gas • Delaware
