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): February 10, 2014

StoneMor Partners L.P.

(Exact name of registrant as specified in its charter)

311 Veterans Highway, Suite B, Levittown, PA 19056

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code (215) 826-2800

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:

On February 10, 2014, StoneMor Partners L.P. (the “Partnership”), StoneMor GP LLC, the general partner of the Partnership, and StoneMor Operating LLC, a wholly owned subsidiary of the Partnership, entered into an Underwriting Agreement (the “Underwriting Agreement”) with Raymond James & Associates, Inc., as representative of the underwriters named in the Underwriting Agreement (the “Underwriters”).

The Underwriting Agreement provides for the issuance and sale by the Partnership of up to 2,000,000 common units representing limited partner interests in the Partnership (“Common Units”) in an underwritten public offering (the “Units Offering”) at a price to the public of $24.45 per Common Unit. The Partnership has also granted the Underwriters a 30-day option to purchase up to 300,000 additional Common Units to cover over-allotments.

Raymond James & Associates, Inc. is an affiliate of one of the lenders under the Partnership’s Third Amended and Restated Credit Agreement, dated as of January 19, 2012, as amended, which will receive a portion of the proceeds of the Units Offering.

The Partnership’s sale of the Common Units in the Units Offering was registered under the Securities Act of 1933, as amended, pursuant to the Partnership’s shelf registration statement on Form S-3 (File No. 333-192670).

The Units Offering closed on February 14, 2014. A copy of the Underwriting Agreement is filed as Exhibit 1.1 to this Current Report on Form 8-K and is incorporated herein by reference.

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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: February 14, 2014

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