Check the listing for details. 2007 Blackstone Group IPO Prospectus Private Equity Lehman Bros Citi Merrill. Condition: Used. Listed at 45.00 USD. You are bidding on a 2007 Initial Public Offering (IPO) prospectus for the Blackstone Group. The prospectus is over 400 pages in length and is in extremely good condition. Message me with any questions you might have