The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F COVER PAGE

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Report for the Calendar Year or Quarter Ended:12-31-2015
Check here if Amendment  Amendment Number:
This Amendment (Check only one.):  is a restatement.
  adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name:Blackstone Group L.P.
Address:345 PARK AVENUE
NEW YORK, NY  10154
Form 13F File Number:028-13114

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:
Name:John G. Finley
Title:Authorized Person
Phone:212-583-5000
Signature, Place, and Date of Signing:
/s/ John G. FinleyNew YorkNY02-16-2016
[Signature][City, State][Date]
The following information corresponds to the securities indicated in the attached Information Table: (A) Includes 1,988,529 shares of KOSMOS ENERGY LTD that are not under the investment discretion of The Blackstone Group L.P. but are under the investment discretion of Blackstone Family GP L.L.C., of which Mr. Stephen A. Schwarzman is a controlling person. Represents voting authority over an aggregate of 96,552,512 shares. (B) Includes 1,640,320 shares of MICHAELS COS INC that are not under the investment discretion of The Blackstone Group L.P. but are under the investment discretion of Blackstone Family GP L.L.C., of which Mr. Stephen A. Schwarzman is a controlling person. (C) Includes 80,675 shares of HUDSON PAC PPTYS INC that are not under the investment discretion of The Blackstone Group L.P. but are under the investment discretion of Blackstone Family GP L.L.C., of which Mr. Stephen A. Schwarzman is a controlling person. (D) Includes 40,285 shares of NXP SEMICONDUCTORS N V that are not under the investment discretion of The Blackstone Group L.P. but are under the investment discretion of Blackstone Family GP L.L.C., of which Mr. Stephen A. Schwarzman is a controlling person. (E) Includes 787,909 shares of PERFORMANCE FOOD GROUP CO that are not under the investment discretion of The Blackstone Group L.P. but are under the investment discretion of Blackstone Family GP L.L.C., of which Mr. Stephen A. Schwarzman is a controlling person. (F) Options reported in this Form 13F may include more than one series of call or put options, as applicable, with respect to such issuer. (G) The Blackstone Group L.P. and its affiliates ("Blackstone") may be deemed to ultimately have shared control over First Eagle Investment Management, LLC ("First Eagle") with Corsair Capital LLC and its affiliates ("Corsair"). Blackstone and Corsair have an information barrier in place with First Eagle. However, under Section 13(f) of the Securities Exchange Act of 1934, as amended, and the rules promulgated thereunder, each of Blackstone and Corsair may be deemed to have shared investment discretion with First Eagle over the securities managed by First Eagle.
Report Type (Check only one.):
X13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.)
  13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).)
  13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)
Form 13F Summary Page
Report Summary:
Number of Other Included Managers:3
Form 13F Information Table Entry Total:71
Form 13F Information Table Value Total:27,129,649
(thousands)
List of Other Included Managers:
Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.
[If there are no entries in this list, state “NONE” and omit the column headings and list entries.]
No.Form 13F File NumberName
128-12332GSO Capital Partners LP
2 Blackstone Senfina Advisors L.L.C.
3 Blackstone Management Partners L.L.C.