NASDAQ OMX Group (NDAQ)

NASDAQ files its preliminary proxy statement in connection with seeking shareholder approval for the issuance of shares to Borse Dubai

18 October 2007 – As previously announced on 20 September 2007 and 26 September 2007, Borse Dubai Limited (“Borse Dubai”) and The Nasdaq Stock Market, Inc. (“NASDAQ”) have agreed to carry out a series of transactions involving, among other things, the acquisition by NASDAQ of shares in OMX AB (publ) (“OMX”) from Borse Dubai for cash and Nasdaq common stock following the successful completion of the public offer made by Borse Dubai for OMX. These transactions will create a global financial marketplace with a unique footprint spanning the U.S., Europe, the Middle East and strategic emerging markets. The transactions are subject to a number of conditions, including approval of NASDAQ’s shareholders for the issuance of shares to Borse Dubai.

On Friday, 12 October 2007, NASDAQ filed with the United States Securities and Exchange Commission (“SEC”) a preliminary proxy statement on Schedule 14A in connection with such shareholder approval process.

In addition to the parties’ joint press announcements of 20 and 26 September 2007 and the proxy statement, NASDAQ has also filed with the SEC a Form 8-K statement, a portion of which contains some additional information on the transactions. Item 1.01 of that Form 8-K is attached hereto. The preliminary proxy statement on Schedule 14A (and any subsequent amendments) and the entire Form 8-K statement are also available, or will be available when filed, at the SEC’s website at www.sec.gov.

IMPORTANT NOTICES

Notice from Borse Dubai

The release, publication or distribution of this announcement in certain jurisdictions may be restricted by law or regulation and therefore persons in such jurisdictions into which this announcement is released, published or distributed must inform themselves about and observe such restrictions.

The Borse Dubai Offer has not been and is not being made and this press release may not be distributed, directly or indirectly, in or into, nor will any tender of shares be accepted from or on behalf of holders in, any jurisdiction in which the making of the Borse Dubai offer, the distribution of this press release or the acceptance of any tender of shares would contravene applicable laws or regulations or require further offer documents, filings or other actions in addition to those required under Swedish law, except under applicable exemption.

The Borse Dubai Offer is not being made, directly or indirectly, by use of mail or any other means or instrumentality (including, without limitation, facsimile transmission, electronic mail, telex, telephone and the internet) in or into Canada and the Borse Dubai offer will not be capable of acceptance by any such use, means, instrumentality or facility of, or from within Canada unless an exemption from the applicable securities laws and regulations of any relevant provinces of Canada is available. Any persons receiving this press release should observe these restrictions and should not mail or otherwise distribute, forward or transmit it in, into or from Canada.

In accordance with normal Swedish market practice, Borse Dubai and its affiliates and subsidiaries and any adviser, broker or other person acting as the agent of or on behalf of Borse Dubai reserve the right to make certain purchases of, or arrangements (whether involving option agreements or otherwise) to purchase, directly or indirectly, OMX ordinary shares or any securities that are immediately convertible into, exchangeable for, or exercisable for, OMX ordinary shares, other than pursuant to the Offer. These purchases may occur either in the open market at prevailing prices or in private transactions at negotiated prices. Any such future purchases will be made in compliance with applicable laws, rules and regulations. Any information about such purchases will be disclosed to the extent required by law, or any applicable rules or regulations.

Notice from NASDAQ

Cautionary Note Regarding Forward-Looking Statements

Information set forth in this communication contains forward-looking statements, which involve a number of risks and uncertainties. The parties caution readers that any forward-looking information is not a guarantee of future performance and that actual results could differ materially from those contained in the forward-looking information. Such forward-looking statements include, but are not limited to, statements about the benefits of NASDAQ’s offer, the transactions contemplated by NASDAQ’s agreements with Borse Dubai and OMX, the proposed business combination transaction involving NASDAQ and OMX, including estimated revenue and cost synergies, the combined company’s plans, objectives, expectations and intentions, the proposed uses of proceeds from the sale of the LSE stake and other statements that are not historical facts. Additional risks and factors are identified in NASDAQ’s filings with the U.S. Securities Exchange Commission (the “SEC”), including its Report on Form 10-K for the fiscal year ending December 31, 2006

which is available on NASDAQ’s website at http://www.nasdaq.com and the SEC’s website at SEC’s website at www.sec.gov. and in OMX’s filings including its annual report for 2006, which is available on OMX’s website at http://www.omxgroup.com. The parties undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise.

Notice to OMX shareholders

While NASDAQ’s offer is being made to all holders of OMX shares, this document does not constitute an offer to purchase, sell or exchange or the solicitation of an offer to purchase, sell or exchange any securities of OMX or an offer to purchase, sell or exchange or the solicitation of an offer to purchase, sell or exchange any securities of Nasdaq in any jurisdiction in which the making of the offer or the acceptance of any tender of shares therein would not be made in compliance with the laws of such jurisdiction. In particular, NASDAQ’s offer is not being made, directly or indirectly, in or into Australia, Canada, Japan or South Africa. While NASDAQ reserves the right to make the offer in or into the United Kingdom or any other jurisdiction pursuant to applicable exceptions or following appropriate filings and prospectus or equivalent document publication by NASDAQ in such jurisdictions, pending such filings or publications and in the absence of any such exception NASDAQ’s offer is not made in any such jurisdiction.

Additional Information About this Transaction

In connection with the proposed business combination transaction, a preliminary proxy statement of NASDAQ and other materials have been filed with the United States Securities and Exchange Commission (“SEC”) and are publicly available. Investors and security holders are urged to read the preliminary proxy statement and the definitive proxy statement when it becomes available, as well as other applicable documents regarding the proposed business combination transaction, because those documents contain, or will contain, important information. You may obtain a free copy of those documents and other related documents filed by NASDAQ with the SEC at the SEC’s website at www.sec.gov. The proxy statement and the other documents may also be obtained for free by accessing NASDAQ’s website at http://www.nasdaq.com.

NASDAQ s and other members of management and employees may be deemed to be participants in the solicitation of proxies from NASDAQ stockholders in respect of the transactions described in this communication. You can find information about NASDAQ’s executive officers and directors in NASDAQ’s definitive proxy statement filed with the SEC on April 20, 2007. You can obtain free copies of these documents and of the proxy statement prospectus from NASDAQ by accessing NASDAQ’s website at http://www.nasdaq.com. Additional information regarding the interests of such potential participants will be included in the proxy statement and the other relevant documents filed with the SEC when they become available.

CONTACTS

Borse Dubai

Levick Strategic Communications

Christopher Harvin

+1 202 230 2406

charvin@levick.com

NASDAQ

Bethany Sherman

+1 212 401 8714

Bethany.Sherman@nasdaq.com

Hallvarsson & Halvarsson

Thomas Backteman

+46 8 407 22 66

thomas.backteman@halvarsson.se

HSBC Bank plc is acting as financial adviser to Borse Dubai and no one else in connection with the matters described in this announcement and will not be responsible to anyone other than Borse Dubai for providing the protections afforded to clients of HSBC Bank plc or for providing advice in relation to the matters contained in this announcement.

ABG Sundal Collier is acting as financial adviser to Borse Dubai and no one else in connection with the matters described in this announcement and will not be responsible to anyone other than Borse Dubai for providing the protections afforded to clients of ABG Sundal Collier or for providing advice in relation to the matters contained in this announcement.

JPMorgan is acting as financial adviser to NASDAQ and no one else in connection with the matters described in this announcement and will not be responsible to anyone other than NASDAQ for providing the protections afforded to clients of JPMorgan or for providing advice in relation to the matters contained in this announcement.

SEB Enskilda is acting as financial adviser to NASDAQ and no one else in connection with the matters described in this announcement and will not be responsible to anyone other than NASDAQ for providing the protections afforded to clients of SEB Enskilda or for providing advice in relation to the matters contained in this announcement.

Borse Dubai Limited was incorporated on 7 August 2007 in the Dubai International Financial Centre (“DIFC”) and is registered with the DIFC Registrar of Companies with registered number 0447. Borse Dubai Limited is 60 per cent owned by the Investment Corporation of Dubai, 20 per cent by Dubai Group LLC (a member of the Dubai Holding Group) and 20 per cent by DIFC Investments LLC. Borse Dubai’s sole business purpose is to act as a holding company for investments in stock exchanges, including the Dubai Financial Market and the Dubai International Financial Exchange. Where the context requires or permits, references in this document to Borse Dubai include its current and prospective subsidiaries other than OMX.

BD Stockholm is a wholly-owned Swedish subsidiary of Borse Dubai. BD Stockholm is a limited liability Swedish company with corporate registration number 556732-9940. The company was established on 22 May 2007 under the name Goldcup D 3097 AB and registered with the Swedish Companies Registration Office (Sw. Bolagsverket) on 2 July 2007. BD Stockholm has never conducted and at present does not conduct any business and its sole purpose is to make the Offer and take all actions to finance and complete the Offer and operate as a parent company of OMX.

NASDAQ is the largest U.S. electronic stock market. With approximately 3,200 companies, it lists more companies and, on average, its systems trade more shares per day than any other U.S. market. NASDAQ is home to companies that are leaders across all areas of business including technology, retail, communications, financial services, transportation, media and biotechnology. NASDAQ is the primary market for trading NASDAQ-listed stocks. For more information about NASDAQ, visit the NASDAQ Web site at http://www.nasdaq.com or the NASDAQ Newsroom at http://www.nasdaq.com/newsroom/.

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