UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant x Filed by a Party other than the Registrant ¨

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¨  Preliminary Proxy Statement

¨  Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

¨  Definitive Proxy Statement

x  Definitive Additional Materials

¨  Soliciting Material Pursuant to §240.14a-12

MBIA Inc.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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*** Exercise Your Right to Vote ***

Important Notice Regarding the Availability of Proxy Materials for the Shareholder Meeting to Be Held on May 6, 2015.

MBIA INC. Meeting Information Meeting Type: Annual Meeting For holders as of: March 12, 2015

Date: May 6, 2015 Time: 10:00 AM EDT Location: 2 Manhattanville Road First Floor Purchase, New York 10577

mbia MBIA INC. 1 MANHATTANVILLE ROAD SUITE 301 PURCHASE, NY 10577

You are receiving this communication because you hold shares in the company named above. This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side). We encourage you to access and review all of the important information contained in the proxy materials before voting. See the reverse side of this notice to obtain proxy materials and voting instructions.

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-Before You Vote-

How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE: NOTICE AND PROXY STATEMENT ANNUAL REPORT How to View Online: Have the information that is printed in the box marked by the arrow xxxx xxxx xxxx xxxx (located on the following page) and visit: www.proxyvote.com. How to Request and Receive a PAPER or E-MAIL Copy: If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:

1) BY INTERNET: www.proxyvote.com

2) BY TELEPHONE: 1-800-579-1639

3) BY E-MAIL*: sendmaterial@proxyvote.com

* If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow xxxx xxxx xxxx xxxx (located on the following page) in the subject line. Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before April 22, 2015 to facilitate timely delivery.

How To Vote

Please Choose One of the Following Voting Methods

Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.

Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow xxxx xxxx xxxx xxxx (located on the following page) available and follow the instructions.

Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

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Voting Items

The Board of Directors recommends you vote FOR the following:

1. Election of Directors

1a. Joseph W. Brown

1b. Maryann Bruce

1c. Sean D. Carney

1d. David A. Coulter

1e. Steven J. Gilbert

1f. Charles R. Rinehart

1g. Theodore Shasta

1h. Richard C. Vaughan

The Board of Directors recommends you vote FOR the following proposals:

2. To approve the Company’s Annual Incentive Plan for purposes of Section 162(m) of the Internal Revenue Code.

3. To approve, on an advisory basis, executive compensation.

4. To ratify the selection of PricewaterhouseCoopers LLP, certified public accountants, as independent auditors for the Company for the year 2015.

NOTE: Such other business as may properly come before the meeting or any adjournment thereof.

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