0000950123-09-041303 424B2 1 20090904 20090904 GHL Acquisition Corp. 0001418819 3669 000000000 DE 1231 424B2 33 333-159673 091056337 C/O GREENHILL & CO. 300 PARK AVENUE NEW YORK NY 10022 212-389-1500 C/O GREENHILL & CO. 300 PARK AVENUE NEW YORK NY 10022 424B2 1 y02178e424b2.htm 424B2