Greenhill & Co. formed a private equity fund placement group to be led by four executives from Lehman Brothers. Christopher Kirsten will be a managing director and head of the private equity fund placement group. Patrick S. Dunleavy and Neil Banta will be managing directors, and Dave Brown will be vice president. Mr. Kirsten was a managing director and global head of the private fund marketing group at Lehman Brothers; Mr. Dunleavy was managing director and global head of origination; Mr. Banta was managing director; and Mr. Brown was senior vice president. Randall B. Whitestone, Lehman spokesman, said he could not comment on replacements.