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): November 14, 2013

Lazard Group LLC

(Exact Name of Registrant as Specified in its Charter)

30 Rockefeller Plaza

New York, NY 10020

(Address of Principal Executive Office)

Registrant’s telephone number, including area code: (212) 632-6000

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):

¨    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

On November 14, 2013, Lazard Group LLC (the “Company”) completed its previously announced offering of an aggregate of $500 million of the Company’s 4.250% Senior Notes due 2020 (the “Notes”) in a registered public offering pursuant to the Company’s shelf registration statement on Form S-3, filed with the Securities and Exchange Commission (the “Commission”) on May 26, 2011, as amended by Amendment No. 1 thereto filed with the Commission on July 20, 2011 (Registration No. 333-174547).

The Notes were issued pursuant to a fifth supplemental indenture, dated November 14, 2013, between the Company and The Bank of New York Mellon, as trustee, to an indenture, dated May 10, 2005, between the Company and The Bank of New York Mellon (formerly known as The Bank of New York), as trustee. The Notes bear interest at the rate of 4.250% per year. Interest on the Notes is payable on May 14 and November 14 of each year, beginning on May 14, 2014. The Notes will mature on November 14, 2020. The Company may, at its option, redeem some or all of the Notes at any time by paying a “make-whole” premium, plus accrued and unpaid interest, if any, to the date of redemption. In addition, holders of the Notes may require the Company to repurchase the Notes upon the occurrence of a change of control triggering event. The Notes are senior unsecured obligations of the Company and rank equally with all of its other existing and future senior unsecured indebtedness. Neither Lazard Ltd nor any of the Company’s subsidiaries will guarantee the notes. The indenture and fifth supplemental indenture contain certain covenants, events of default and other customary provisions.

The foregoing descriptions of the Notes, indenture and fifth supplemental indenture are only a summary and are qualified in their entirety by reference to the full text of the indenture and fifth supplemental indenture. A copy of the fifth supplemental indenture is attached hereto as Exhibit 4.1, a copy of the indenture is attached as Exhibit 4.1 to the Company’s Registration Statement (File No. 333-126751) on Form S-4 filed on July 21, 2005, and each is incorporated herein by reference.

The information in Item 1.01 of this Current Report on Form 8-K is incorporated herein by reference.

On November 14, 2013, Lazard Ltd issued a press release announcing the completion of the offering of the Notes by the Company. Lazard Ltd also announced the delivery of a notice of redemption by the Company to redeem any and all of its 7.125% Senior Notes due 2015 (the “2015 Notes”) to all holders of the 2015 Notes. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

On November 14, 2013, Lazard Ltd issued a separate press release announcing the total consideration payable in respect of the Company’s previously announced tender offer for any and all of its outstanding 2015 Notes. A copy of the press release is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

(d) Exhibits.

SIGNATURES

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: November 14, 2013

EXHIBIT INDEX