Exhibit 2.1 STOCKHOLDER'S AGREEMENT THIS STOCKHOLDER'S AGREEMENT, dated as of January 23, 2001 (the "Agreement"), among Northrop Grumman Corporation, a Delaware corporation ("Parent"), NNG, Inc., a Delaware corporation and a direct wholly owned...Stockholder Agreement • January 31st, 2001 • Unitrin Inc • Fire, marine & casualty insurance • Delaware
