NEW YORK--(BUSINESS WIRE)--Blackstone (NYSE: BX) priced its offering of $600 million of 4.300$600 million of 4.950% senior notes due 2036 of Blackstone Reg Finance Co. L.L.C., its indirect subsidiary. The notes are to be fully and unconditionally guaranteed by Blackstone Inc. and its indirect subsidiaries, Blackstone Holdings I L.P., Blackstone Holdings AI L.P., Blackstone Holdings II L.P., Blackstone Holdings III L.P. and Blackstone Holdings IV L.P. Blackstone inten. ...