Exhibit 4 AMENDMENT NO. 2 TO RIGHTS AGREEMENT AMENDMENT NO. 2 dated as of April 15, 1999 to the Rights Agreement dated as of December 6, 1989, as amended by Amendment No. 1 dated as of April 6, 1998 (the "Rights Agreement") between Murphy Oil...Rights Agreement • April 19th, 1999 • Murphy Oil Corp /De • Petroleum refining • New York
