EXHIBIT d (4)(15) INVESTMENT SUB-ADVISORY AGREEMENT This AGREEMENT made this 20th day of October, 2004, by and between THE VARIABLE ANNUITY LIFE INSURANCE COMPANY, hereinafter referred to as "VALIC," and A I M CAPITAL MANAGEMENT, INC., hereinafter...Investment Sub-Advisory Agreement • October 20th, 2004 • Valic Co Ii • Texas
