UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K/A

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 23, 2013

AMARANTUS BIOSCIENCE HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

(408) 737-2734

(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:

¨ Written communications pursuant to Rule 425 under the Securities Act

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act

¨ 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))

EXPLANATORY NOTE

This amendment (“Amendment No. 1”) amends the Registrant’s Current Report on Form 8-K filed with the Commission on September 23, 2013 (the “Original 8-K”) to change the date in the first line of Item 7.01 to September 23, 2013. No other changes have been made to the Original 8-K or Amendment No.1.

Item 7.01 Regulation FD Disclosure 

On September 23, 2013 Amarantus BioScience Holdings, Inc. (the “Company”) announced the following information via its Twitter account.

The information contained in this Current Report on Form 8-K and the exhibits attached hereto shall not be deemed to be “filed” for 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, nor shall such information or such exhibits be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing. The information set forth in or exhibits to this Form 8-K shall not be deemed an admission as to the materiality of any information in this report that is required to be disclosed solely to satisfy the requirements of Regulation FD.

Item 8.01 Other Events.

  Investors and others should note that we announce material financial information to our investors using our investor relations websites, press releases, SEC filings and public conference calls and webcasts. The Company intends to also use the following social media channels as a means of disclosing information about the Company, its services and other matters and for complying with its disclosure obligations under Regulation FD:

The information disclosed under this Item 8.01, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, as amended, except as expressly set forth in such filing.

The information we post through these social media channels may be deemed material. Accordingly, investors should monitor these accounts and the blog, in addition to following the Company’s press releases. SEC filings and public conference calls and webcasts. This list may be updated from time to time.  

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.