GEVO Gevo Inc

EXPLANATORY NOTE

The following constitutes Amendment No. 1 (this “Amendment”) to the statement on Schedule 13D filed on behalf of LANXESS Corporation, a Delaware corporation, and LANXESS AG, a corporation formed under the laws of the Federal Republic of Germany, with the Securities and Exchange Commission on February 22, 2011 (the “Schedule 13D”). All items not supplemented in this Amendment remain unchanged from the Schedule 13D. Each capitalized term used but not defined herein has the meaning ascribed to it in the Schedule 13D.

This Amendment is the Reporting Person’s final amendment to the Schedule 13D and constitutes an exit filing.

Item 2. Identity and Background

Item 2 is supplemented by the addition of the following information:

The address of LANXESS AG is Kennedyplatz1, 50569 Cologne, Germany.

Item 3. Source and Amount of Funds or Other Consideration

Item 3 is supplemented by the addition of the following information:

At the close of business on April 20, 2015, the Issuer effected a one-for-15 reverse stock split, which reduced the aggregate beneficial ownership of the Shares by LANXESS Corporation and LANXESS AG from 2,244,445 to 149,631. On April 4, 2016, LANXESS Corporation sold the remaining 149,631 shares in open market transactions at prevailing market prices for gross proceeds of $35,432.62.

Item 4. Purpose of Transaction

Item 4 is supplemented by the addition of the following information:

Other than the transactions described in Item 3, no Reporting Person or individual identified on Schedule B hereto has any present plan or proposal which would relate to, or could result in, any of the matters set forth in subparagraphs (a) — (j) of Item 4 of Schedule 13D.

Item 5. Interest in Securities of the Issuer

Item 5 is supplemented by the addition of the following information:

The aggregate percentage of Shares reported owned by each person named herein is based upon 23,510,855 Shares outstanding, which is the total number of Shares outstanding as of February 29, 2016, as set forth in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 30, 2016.

(i) LANXESS Corporation

(ii) LANXESS AG

Other than the transactions described in Item 3, no Reporting Person or, to the knowledge of the Reporting Persons, no person identified on Schedule B hereto effected any transactions in Shares during the past 60 days.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: April 19, 2016

SCHEDULE B

Directors and Officers of LANXESS Corporation

The name and current principal occupation of each director and executive officer of LANXESS Corporation is set forth below. Unless otherwise noted, each director and officer is a citizen of the United States and the business address of each director and executive officer is c/o 111 RIDC Park West Drive, Pittsburgh, PA 15275-1112.

Directors and Executive Officers of LANXESS AG

The name and current principal occupation of each member of the Board of Management and Supervisory Board of LANXESS Ag is set forth below. Unless otherwise noted, each such member is a citizen of the Federal Republic of Germany. The business address of each member of the Board of Management is Kennedyplatz1, 50569 Cologne, Germany.

BOARD OF MANAGEMENT

SUPERVISORY BOARD

All of the above with postal address at Kennedyplatz1, 50569 Cologne, Germany