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): April 21, 2015

Marchex, Inc.

(Exact name of Registrant as Specified in its Charter)

520 Pike Street

Suite 2000

Seattle, Washington 98101

(Address of Principal Executive Offices)

(206) 331-3300

(Registrant’s telephone number, including area code)

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):

Item 7.01 Regulation FD Disclosure.

On April 22, 2015, Marchex, Inc. (“Marchex”) issued a press release announcing the sale of the bulk of its domain portfolio in a series of transactions for aggregate sale proceeds of $34.8 million, which includes $28.1 million at closing from GoDaddy.com LLC (plus additional earn-out payments subject to achieving certain sales targets) pursuant to an Asset Purchase Agreement dated as of April 21, 2015, as well as $6.7 million in direct domain sales by Marchex since January 2015. The full text of the press release issued in connection with the announcement is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information in this Item 7.01 and Item 9.01(d) is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section. Such information shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933 (the “Securities Act”) or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Safe Harbor Disclosure

This Current Report on Form 8-K contains forward-looking statements within the meaning of the Securities Act and of the Exchange Act that involve substantial risks and uncertainties. All statements, other than statements of historical facts, included in this Current Report on Form 8-K regarding our strategy, future operations, future financial position, future revenues, other financial guidance, acquisitions, dispositions, projected costs, prospects, plans and objectives of management are forward-looking statements.

Actual results could differ materially from those projected in our forward-looking statements due to risks, uncertainties and other factors. Important factors that could affect actual results are discussed in Marchex’s filings with the Securities and Exchange Commission (“SEC”) including but not limited to the risks discussed under Item 1A “Risk Factors” in Marchex’s Annual Report on Form 10-K for the year ended December 31, 2014, as well as our other SEC filings. Marchex undertakes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

SIGNATURES

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