UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of April 2017

Commission File Number: 001-34848

SEANERGY MARITIME HOLDINGS CORP.

(Translation of registrant's name into English)

16 Grigoriou Lambraki Street

166 74 Glyfada

Athens, Greece

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F [X] Form 40-F [ ]

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ___

Note: Regulation S-T Rule 101(b)(1) only permits the submission in paper of a Form 6-K if submitted solely to provide an attached annual report to security holders.

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)7: ___

Note: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K if submitted to furnish a report or other document that the registrant foreign private issuer must furnish and make public under the laws of the jurisdiction in which the registrant is incorporated, domiciled or legally organized (the registrant's "home country"), or under the rules of the home country exchange on which the registrant's securities are traded, as long as the report or other document is not a press release, is not required to be and has not been distributed to the registrant's security holders, and, if discussing a material event, has already been the subject of a Form 6-K submission or other Commission filing on EDGAR.

INFORMATION CONTAINED IN THIS FORM 6-K REPORT

Attached to this report on Form 6-K as Exhibit 99.1 is the Operating and Financial Review and Prospects  of Seanergy Maritime Holdings Corp. (the "Company") for the year ended December 31, 2016 and the Audited Consolidated Financial Statements of the Company as of and for the year ended December 31, 2016, which financial statements have been audited by Ernst & Young (Hellas) Certified Auditors-Accountants S.A., independent registered public accounting firm, as set forth in their report thereon included therein.

Attached to this report on Form 6-K as Exhibit 99.2 is a consent of Ernst & Young (Hellas) Certified Auditors-Accountants S.A., independent registered public accounting firm.

Attached to this report on Form 6-K as Exhibit 101 is the following financial information from the Company's Consolidated Financial Statements as of and for the year ended December 31, 2016, formatted in Extensible Business Reporting Language (XBRL): (i) Consolidated Balance Sheets as of December 31, 2016 and 2015; (ii) Consolidated Statements of Income/(Loss) for the years ended December 31, 2016, 2015 and 2014; (iii) Consolidated Statements of Stockholders' Equity for the years ended December 31, 2016, 2015 and 2014 (iv) Consolidated Statements of Cash Flows for the years ended December 31, 2016, 2015 and 2014; and (v) Notes to Consolidated Financial Statements.

This report and the exhibits hereto are hereby incorporated by reference into the Company's registration statement on Form F-3 (File No. 333-166697) filed with the U.S. Securities and Exchange Commission (the "SEC") with an effective date of May 19, 2010, the Company's registration statement on Form F-3 (File No. 333-169813) filed with the SEC with an effective date of November 12, 2010 and the Company's registration statement on Form F-3 (File No. 333-205301) filed with the SEC with an effective date of August 14, 2015.

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, thereunto duly authorized.