Exhibit 4.4 ----------- AMENDMENT NO. 1 TO RIGHTS AGREEMENT AMENDMENT NO. 1 (this "Amendment"), dated as of May 4, 2001, to the Rights Agreement (the "Rights Agreement"), dated as of July 17, 1997, by and between Valero Energy Corporation (the...Rights Agreement • May 10th, 2001 • Valero Energy Corp/Tx • Petroleum refining • Delaware
