UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 25, 2017

The Blackstone Group L.P.

(Exact name of Registrant as specified in its charter)

(212) 583-5000

(Registrant’s telephone number, including area code)

NOT APPLICABLE

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 8.01 Other Events.

On September 25, 2017, The Blackstone Group L.P. issued a press release announcing that Blackstone Holdings Finance Co. L.L.C., an indirect subsidiary of The Blackstone Group L.P., priced an offering of $300,000,000 aggregate principal amount of 3.150% Senior Notes due 2027 and $300,000,000 aggregate principal amount of 4.000% Senior Notes due 2047. The notes are to be fully and unconditionally guaranteed by The Blackstone Group L.P., 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 intends to use the net proceeds from the sale of the notes, together with cash on hand or available liquidity, to repurchase all of its outstanding 6.625% Senior Notes due 2019 (the “2019 Notes”) pursuant to a tender offer and to redeem any of the 2019 Notes that remain outstanding thereafter.

The notes were offered pursuant to Rule 144A and Regulation S under the Securities Act of 1933. The notes have not been registered under the Securities Act and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements.

A copy of the press release is attached hereto as Exhibit 99.1.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: September 25, 2017