X0306 4 2015-04-28 0 0001393818 Blackstone Group L.P. BX 0001500278 Finley John G C/O THE BLACKSTONE GROUP L.P. 345 PARK AVENUE NEW YORK NY 10154 0 1 0 0 Chief Legal Officer Common units representing limited partner interests 2015-04-28 4 C 0 12000 0.00 A 41892 D Common units representing limited partner interests 2015-04-29 4 S 0 12000 42.18 D 29892 D Blackstone Holdings partnership units 2015-04-28 4 C 0 12000 D Common units representing limited partner interests 12000 521103 D Pursuant to an exchange agreement, the Reporting Person exchanged 12,000 Blackstone Holdings partnership units for an equal number of common units of The Blackstone Group L.P. The price reported in Column 4 is a weighted average price. These units were sold in multiple transactions at prices ranging from $42.07 to $42.35, inclusive. The Reporting Person undertakes to provide, upon request by the Securities and Exchange Commission staff, the issuer or a security holder of the issuer, full information regarding the number of units sold at each separate price for all transactions reported on this Form 4. A "Blackstone Holdings partnership" unit collectively refers to one limited partner interest in each of Blackstone Holdings I L.P., Blackstone Holdings II L.P., Blackstone Holdings III L.P., and Blackstone Holdings IV L.P. Subject to the minimum retained ownership requirements and transfer restrictions set forth in the partnership agreements of the Blackstone partnerships, the Reporting Person has the rights, exercisable from time to time, to exchange each Blackstone Holdings partnership unit for one common unit of The Blackstone Group L.P. The Blackstone Holdings partnership units have no expiration date and may not be exchanged at any time prior to December 31, 2015 other than pursuant to transactions or programs approved by Blackstone. Tabea Y. Hsi as Attorney-In-Fact 2015-04-30