FMS Fresenius Medical Care AG

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K/A

REPORT OF FOREIGN PRIVATE ISSUER

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

Securities Exchange Act of 1934

For the month of September 2015

FRESENIUS MEDICAL CARE AG & Co. KGaA

(Translation of registrant’s name into English)

Else-Kröner Strasse 1

61346 Bad Homburg

Germany

(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.

Form 20-F  x                         Form 40-F  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)(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

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  o                                      No  x

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

This Form 6-K/A amends the Form 6-K furnished by Fresenius Medical Care AG & Co. KGaA (the “Company”) on September 21, 2015 to furnish the corrected introductory text of the Investor News Release issued by the Company on September 21, 2015. None of the quarterly results disclosed in the Form 6-K furnished on September 21, 2015 are being amended.

EXHIBITS

Exhibit 99.1  Investor News Release issued September 21, 2015.

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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.

DATE: September 21, 2015

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Exhibit 99.1

September 21, 2015

Fresenius Medical Care provides historical segment data

Bad Homburg, Germany — Fresenius Medical Care AG & Co. KGaA (“the company” or “Fresenius Medical Care”), the world’s largest provider of dialysis products and services, has aligned the disclosure of segments in the first quarter 2015.

Hereinafter we provide an update of historical quarterly numbers for 2014, reflecting both, the changes in the disclosure of the segments as well as the additional information provided on Care Coordination. All numbers are on a reported basis and in US$. Changes to the actual currency environment are obviously not reflected.

This Investor News will be published also on the Company’s website www.freseniusmedicalcare.com in the section “News”.

Fresenius Medical Care is the world’s largest provider of products and services for individuals with renal diseases of which more than 2.6 million patients worldwide regularly undergo dialysis treatment. Through its network of 3,421 dialysis clinics, Fresenius Medical Care provides dialysis treatments for 289,610 patients around the globe. Fresenius Medical Care is also the leading provider of dialysis products such as dialysis machines or dialyzers. Along with the core business, the company focuses on expanding the range of additional medical services in the field of care coordination.

For more information about Fresenius Medical Care, visit the company’s website at www.freseniusmedicalcare.com.

Disclaimer

This release contains forward-looking statements that are subject to various risks and uncertainties. Actual results could differ materially from those described in these forward-looking statements due to certain factors, including changes in business, economic and competitive conditions, regulatory reforms, foreign exchange rate fluctuations, uncertainties in litigation or investigative proceedings, and the availability of financing. These and other risks and uncertainties are detailed in Fresenius Medical Care AG & Co. KGaA’s reports filed with the U.S. Securities and Exchange Commission. Fresenius Medical Care AG & Co. KGaA does not undertake any responsibility to update the forward-looking statements in this release.

Number prior year according to changes in segment disclosure and additional data on Care Coordination:

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