ABGOY Abengoa SA (CE)

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 November, 2015

Commission File Number 001-36125

ABENGOA, S.A.

(Exact name of registrant as specified in its charter)

Not applicable

(Translation of registrant’s name into English)

Campus Palmas Altas

C/ Energía Solar 1

41014, Seville, Spain

Tel: +34 954 93 71 11

(Address of Principal Executive Offices)

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

x Form 20-F o 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): o

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): o

ABENGOA, S.A.

FORM 6-K

Abengoa, S.A. is furnishing under the cover of Form 6-K the following:

2

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.

3

Exhibit 99.1

ABENGOA

Innovative technology solutions for sustainability

Abengoa announces third quarter 2015 earnings conference call

November 12th, 2015.- Abengoa (MCE: ABG.B/P SM /NASDAQ: ABGB), the international company that applies innovative technology solutions for sustainability in the energy and environment sectors, today announced that it will release its financial results for the third quarter of 2015 after the closing of the Spanish market on Friday, November 13th, 2015.

The financial results, as well as the earnings presentation slides to be used on the conference call, will be published on Abengoa’s website: www.abengoa.com

Abengoa’s CEO, Santiago Seage, and the Co-CFO for IR and Capital Markets, Ignacio García-Alvear, will hold a conference call the same day, Friday, November 13th, 2015, which will be simultaneously webcast, at 6:00 pm Madrid time and 12:00 pm New York time.

In order to access the conference call participants should dial: +44 (0) 2033679459 (UK). A live webcast of the conference call (including the slide deck to be used) will be available on Abengoa’s corporate website. Please visit the website at least 15 minutes earlier in order to register for the live webcast and download any necessary audio software.

A replay of the call will be available at the Investor Relations page of Abengoa’s corporate website approximately two hours after the conference call is completed.

About Abengoa

Abengoa (MCE: ABG.B/P SM /NASDAQ: ABGB) applies innovative technology solutions for sustainability in the energy and environment sectors, generating electricity from renewable resources, converting biomass into biofuels and producing drinking water from sea water. (www.abengoa.com)

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