UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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): March 5, 2013

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 March 5, 2013, Altairnano, Inc. (the "Company") and Inversiones Energeticas S.A. de C.V. (“INE”) entered into an amendment (the “Amendment”) to the existing contract dated February 9, 2011 between the Company and INE (the “Contract”) for the provision of a ten megawatt ALTI-ESS advanced battery system in El Salvador. As anticipated by the Contract, the Contract was submitted for approval to a government entity that regulates electric utilities in El Salvador. The failure of that entity in April 2011 to grant the required approval triggered a 120-day period during which INE could continue to seek approval and at the end of which the Contract automatically terminated. That period has previously been extended by the Company and INE. Pursuant to the Amendment, the period during which INE can seek regulatory approval, before automatic termination, is through April 24, 2013.

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.

3