Form 6-K Filing


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 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of April 2013..

Commission File Number: 000-31815

HYDROGENICS CORPORATION - CORPORATION HYDROGENIQUE
(Translation of registrant's name into English)

220 Admiral Boulevard, Mississauga, Ontario, L5T 2N6
(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):       

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):       

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934. Yes [   ]      No [ x ]

If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-     .





EXHIBIT LIST

Exhibit Description
99.1 Press release dated April 29, 2013


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, thereunto duly authorized.

  HYDROGENICS CORPORATION - CORPORATION HYDROGENIQUE


Date: April 29, 2013 By:     /s/ ROBERT MOTZ
Name:Robert Motz
Title: Chief Financial Officer