X0306 4 2015-02-10 0 0001393818 Blackstone Group L.P. BX 0001238989 JAMES HAMILTON E C/O THE BLACKSTONE GROUP L.P. 345 PARK AVENUE NEW YORK NY 10154 1 1 0 0 President and COO Common units representing limited partner interests 2014-02-10 4 C 0 2000000 0.00 A 2020176 D Common units representing limited partner interests 2014-02-10 5 G 0 E 2000000 0.00 D 20176 D Common units representing limited partner interests 2014-02-10 5 G 0 E 2000000 0.00 A 2000000 I See footnote Blackstone Holdings partnership units 2014-02-10 4 C 0 2000000 D Common units representing limited partner interests 2000000 21523093 D Blackstone Holdings partnership units Common units representing limited partner interests 7157207 7157207 I See footnote Pursuant to an exchange agreement, the Reporting Person exchanged 2,000,000 Blackstone Holdings partnership units for an equal number of common units of The Blackstone Group L.P. and thereafter transferred such 2,000,000 common units to a limited liability company beneficially owned by the Reporting Person, his spouse and the Children's Trust (as defined in footnote 4 below). These units are held in a limited liability company beneficially owned by the Reporting Person, his spouse and the Children's Trust (as defined in footnote 4 below). 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 holder 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. These units are held in a trust for the benefit of the Reporting Person's children (the Children's Trust), of which the Reporting Person is a trustee, but the Reporting Person does not have or share investment control with respect to the units. The Reporting Person disclaims beneficial ownership of the securities reported on this form except to the extent of his pecuniary interest. Tabea Y. Hsi as Attorney-In-Fact 2015-02-12