UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): May 9, 2013

Chemtura Corporation

(Exact name of registrant as specified in its charter)

(203) 573-2000

(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 (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ 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))

Item 5.03. Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.

At the Annual Meeting of Shareholders (the “Annual Meeting”) of Chemtura Corporation (the “Company”) held on May 9, 2013, the Company’s shareholders approved a proposal to amend the Company’s Amended and Restated Certificate of Incorporation (the “Certificate of Incorporation”) to delete the plurality vote standard in uncontested director elections to allow the By-Laws to provide a majority vote standard in those elections. The amendment to the Certificate of Incorporation was previously approved by the Company’s Board of Directors, subject to approval by the shareholders. The amendment to the Certificate of Incorporation became effective on May 9, 2013. To implement the majority vote standard, the Board of Directors also previously approved an amendment to Article II, Section 8 of the Company’s By-Laws, contingent upon shareholder approval of the majority vote standard proposal, providing for a majority vote standard in uncontested director elections. The amendment to the By-Laws became effective on May 9, 2013.

The foregoing description of the amendments to the Certificate of Incorporation and By-Laws are qualified in their entirety by reference to the full text of such amendments, which are filed as Exhibits 3.1 and 3.2 to this Current Report on Form 8-K and are incorporated herein by reference.

Item 5.07. Submission of Matters to a Vote of Security Holders.

As described in Item 5.03 above, the Company held its Annual Meeting on May 9, 2013. The matters listed below were submitted to a vote of the shareholders through the solicitation of proxies, and the proposals are described in detail in Chemtura’s Proxy Statement filed with the Securities and Exchange Commission (“SEC”) on April 3, 2013 (the “Proxy Statement”). The results of the shareholder vote are as follows:

Item 8.01 Other Events.

As previously disclosed, on July 31, 2012, the Board of Directors authorized an increase in the Company’s share repurchase program from $50 million to up to $100 million and extended the program to November 2013. As of May 8, 2013, the Company had purchased 3.4 million shares for $41 million. On May 9, 2013, the Board of Directors authorized an increase in the share repurchase program by $41 million such that the Company may now repurchase up to $100 million and extended the program through March 31, 2014. The shares are expected to be repurchased from time to time through open market purchases. The program, which does not obligate the Company to repurchase any particular amount of common stock, may be modified or suspended at any time at the Board’s discretion. The manner, price, number and timing of such repurchases, if any, will be subject to a variety of factors, including market conditions and the applicable rules and regulations of the SEC.

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 hereunto duly authorized.

Exhibit Index