UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D/A

(Amendment No. 3)

Under the Securities Exchange Act of 1934

GlyEco, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value

(Title of Class of Securities)

0000931799

(CUSIP Number)

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

March 24, 2014

(Date of Event which requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box ¨

CUSIP No. 0000931799

13D/A

Page 7 of 11

This Amendment No. 3 (the "Amendment") amends and supplements the Items set forth below of the Statement of Beneficial Ownership on Schedule 13D, originally filed by the Wynnefield Reporting Persons (as defined in the Schedule 13D) with the Securities and Exchange Commission on October 15, 2013, as amended by Amendment No. 1 filed on January 24, 2014, and as amended by Amendment No. 2 filed on March 13, 2014 (collectively, the “Schedule 13D”) with respect to shares of common stock, $0.0001 par value per share of GlyEco, Inc., a Nevada corporation (the “Issuer”) with its principal executive offices located at 4802 East Ray Road, Suite 23-196, Phoenix, Arizona 85044. Unless specifically amended hereby, the disclosures set forth in the Schedule 13D shall remain unchanged. Capitalized terms used but not defined herein shall have the meaning set forth in the Schedule 13D.

Item 3. Source and Amount of Funds or Other Consideration.

Item 3 of the Schedule 13D is hereby amended and restated as follows:

The securities reported in this Schedule 13D as directly beneficially owned by the Wynnefield Reporting Persons were acquired with funds of approximately $3,363,078 (including brokerage commissions). All such funds were provided from the working capital or personal funds of the Wynnefield Reporting Persons who directly beneficially own such securities.

Item 5. Interest in Securities of the Issuer.

Item 5 of the Schedule 13D is hereby amended and restated as follows:

(a), (b) and (c). As of March 28, 2014, the Wynnefield Reporting Persons beneficially owned in the aggregate 4,481,399 shares of Common Stock, constituting approximately 8.9% of the outstanding shares of Common Stock, which shares are comprised of 3,356,399 shares of Common Stock and 1,125,000 shares of Common Stock issuable to the Wynnefield Reporting Persons upon the exercise of presently exercisable warrants to purchase shares of Common Stock having an exercise price of $1.50 per share (the “Warrants”). The percentage of shares of Common Stock reported as being beneficially owned by the Wynnefield Reporting Persons is based upon 49,900,906 shares outstanding, which consists of (i) 48,775,906 shares of Common Stock outstanding as of November 13, 2013, as set forth in the Issuer’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2013, filed with the Securities and Exchange Commission (the “Commission”) on November 18, 2013; and (ii) 1,125,000 shares of Common Stock issuable upon exercise of the Warrants held by the Wynnefield Reporting Persons.

The following table sets forth certain information with respect to Common Stock directly beneficially owned by the Wynnefield Reporting Persons listed below:

WCM is the sole general partner of Wynnefield Partners and Wynnefield Partners I and, accordingly, may be deemed to be the indirect beneficial owner (as that term is defined under Rule 13d-3 under the Exchange Act) of the Common Stock that Wynnefield Partners and Wynnefield Partners I beneficially own. WCM, as the sole general partner of Wynnefield Partners and Wynnefield Partners I, has the sole power to direct the voting and disposition of the Common Stock that Wynnefield Partners and Wynnefield Partners I beneficially own. Messrs. Obus and Landes are the co-managing members of WCM and, accordingly, each of Messrs. Obus and Landes may be deemed to be the indirect beneficial owner (as that term is defined under Rule 13d-3 under the Exchange Act) of the Common Stock that WCM may be deemed to beneficially own. Each of Messrs. Obus and Landes, as co-managing members of WCM, shares the power to direct the voting and disposition of the shares of Common Stock that WCM may be deemed to beneficially own.

WCI is the sole investment manager of Wynnefield Offshore and, accordingly, may be deemed to be the indirect beneficial owner (as that term is defined under Rule 13d-3 under the Exchange Act) of the Common Stock that Wynnefield Offshore beneficially owns. WCI, as the sole investment manager of Wynnefield Offshore, has the sole power to direct the voting and disposition of the Common Stock that Wynnefield Offshore beneficially owns. Messrs. Obus and Landes are executive officers of WCI and, accordingly, each may be deemed to be the indirect beneficial owner (as that term is defined under Rule 13d-3 under the Exchange Act) of the Common Stock that WCI may be deemed to beneficially own. Messrs. Obus and Landes, as executive officers of WCI, share the power to direct the voting and disposition of the shares of Common Stock that WCI may be deemed to beneficially own.

Beneficial ownership of the Common Stock shown on the cover pages of and set forth elsewhere in this Schedule 13D for each member of the Wynnefield Reporting Persons assumes that they have not formed a group for purposes of Section 13(d)(3) under the Exchange Act, and Rule 13d-5(b)(1) promulgated thereunder. If the members of the Wynnefield Reporting Persons were deemed to have formed a group for purposes of Section 13(d)(3) and Rule 13d-5(b)(1), the group would be deemed to own beneficially (and may be deemed to have shared voting and dispositive power over) in the aggregate 4,481,399 shares of Common Stock, constituting approximately 8.9% of the outstanding shares of Common Stock, which shares are comprised of 3,356,399 shares of Common Stock and 1,125,000 shares of Common Stock issuable to the Wynnefield Reporting Persons upon the exercise of presently exercisable warrants to purchase shares of Common Stock having an exercise price of $1.50 per share (the “Warrants”). The percentage of shares of Common Stock reported as being beneficially owned by the Wynnefield Reporting Persons is based upon 49,900,906 shares outstanding, which consists of (i) 48,775,906 shares of Common Stock outstanding as of November 13, 2013, as set forth in the Issuer’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2013, filed with the Commission on November 18, 2013; and (ii) 1,125,000 shares of Common Stock issuable upon exercise of the Warrants held by the Wynnefield Reporting Persons.

The filing of this Schedule 13D and any future amendment by the Wynnefield Reporting Persons, and the inclusion of information herein and therein with respect to WCM, WCI and Messrs. Obus and Landes, shall not be considered an admission that any of such persons, for the purpose of Section 16(b) of the Exchange Act, are the beneficial owners of any shares in which such persons do not have a pecuniary interest. Each of WCM, WCI and Messrs. Obus and Landes disclaims any beneficial ownership of the shares covered by this Schedule 13D.

The Wynnefield Reporting Persons have acquired shares of Common Stock during the last 60 days, as follows:

(d) and (e). Not Applicable

SIGNATURE

After reasonable inquiry and to the best of their knowledge and belief, the undersigned certify that the information set forth in this Schedule 13D is true, complete and correct.

Dated: March 28, 2014

WYNNEFIELD PARTNERS SMALL CAP VALUE, L.P. I

By: Wynnefield Capital Management, LLC,

its General Partner

By: /s/ Nelson Obus

Nelson Obus, Co-Managing Member

WYNNEFIELD PARTNERS SMALL CAP VALUE, L.P.

By: Wynnefield Capital Management, LLC,

its General Partner

By: /s/ Nelson Obus

Nelson Obus, Co-Managing Member

WYNNEFIELD SMALL CAP VALUE OFFSHORE FUND, LTD.

By: Wynnefield Capital, Inc.,

its Investment Manager

By: /s/ Nelson Obus

Nelson Obus, President

WYNNEFIELD CAPITAL MANAGEMENT, LLC

By: /s/ Nelson Obus

Nelson Obus, Co-Managing Member

WYNNEFIELD CAPITAL, INC.

By: /s/ Nelson Obus

Nelson Obus, President

/s/ Nelson Obus

Nelson Obus, Individually

/s/ Joshua Landes

Joshua Landes, Individually