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): November 1, 2012

JDA Software Group, Inc.

(Exact name of registrant as specified in its charter)

14400 North 87th Street

Scottsdale, Arizona 85260-3649

(Address of principal executive offices including zip code)

(480) 308-3000

(Registrant’s telephone number, including area code)

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

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:

On November 1, 2012, JDA Software Group, Inc., a Delaware corporation (the “Company”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with RP Crown Parent, LLC, a Delaware limited liability company (“Parent”), and RP Crown Acquisition Sub, LLC, a Delaware limited liability company and a wholly owned subsidiary of Parent (“Merger Sub”), pursuant to which, among other things, Merger Sub will commence a tender offer (the “Offer”) within 10 business days to acquire all of the outstanding shares of common stock, $0.01 par value per share, of the Company at a purchase price of $45.00 per share, net to the seller in cash without interest. Upon successful completion of the Offer, Merger Sub will merge with and into the Company (the “Merger”) and the Company will become a wholly-owned subsidiary of Parent. The Merger Agreement also provides that the Merger may be consummated regardless of whether the Offer is completed, but if the Offer is not completed, the Merger will only be able to be consummated after the stockholders of the Company have adopted the Merger Agreement at a meeting of stockholders. In the Merger, each outstanding share of Company common stock, other than shares of Company common stock owned by the Company, Parent or Merger Sub or by stockholders who have perfected and not withdrawn a demand for appraisal under Delaware law, will be converted into the right to receive an amount equal to the Offer Price in cash without interest. Parent and Merger Sub are affiliates of RedPrairie. The Merger Agreement was unanimously approved by the Company’s Board of Directors. A copy of the press release issued by the Company announcing the transaction is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The terms of the Merger Agreement, including the conditions thereto, will be described in a subsequent filing on Form 8-K.

On November 1, 2012, the Company sent a letter to its employees, which is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

On November 1, 2012, the Company sent a list of Frequently Asked Questions to its employees, which is attached hereto as Exhibit 99.3 and is incorporated herein by reference.

On November 1, 2012, the Company sent a letter to its customers, which is attached hereto as Exhibit 99.4 and is incorporated herein by reference.

On November 1, 2012, the Company sent a list of Frequently Asked Questions to its customers, which is attached hereto as Exhibit 99.5 and is incorporated herein by reference.

On November 1, 2012, Hamish Brewer, President and CEO of the Company, held a call with employees during which slides were presented. The slides are attached hereto as Exhibit 99.6 and are incorporated by reference.

Forward Looking Statements

This report may contain forward-looking statements. These forward-looking statements involve significant risks and uncertainties. All statements other than statements of historical fact are statements that could be deemed forward-looking statements, including all statements regarding information regarding the intent, belief or current expectation of the Company and members of its senior management team. Forward-looking statements include, without limitation, statements regarding prospective performance and opportunities and the outlook for the Company’s businesses, performance and opportunities and regulatory approvals, the anticipated timing of filings and approvals relating to the transaction; the expected timing of the completion of the transaction; the ability to complete the transaction considering the various closing conditions; and any assumptions underlying any of the foregoing. Investors are cautioned that any such forward-looking statements are not guarantees of future performance and involve risks and uncertainties and are cautioned not to place undue reliance on these forward-looking statements. Actual results may differ materially from those currently anticipated due to a number of risks and uncertainties. Risks and uncertainties that could cause the actual results to differ from expectations contemplated by forward looking statements include: uncertainties as to the timing of the tender offer and merger; uncertainties as to how many of the Company stockholders will tender their stock in the offer; the possibility that competing offers will be made; the possibility that various closing conditions for the transaction may not be satisfied or waived, including that a governmental entity may prohibit, delay or refuse to grant approval for the consummation of the transaction; the effects of disruption from the transaction making it more difficult to maintain relationships with employees, customers, other business partners or governmental entities; other business effects, including the effects of industry, economic or political conditions outside of the Company’s control; transaction costs; actual or contingent liabilities; and other risks and uncertainties discussed in the Company’s filings with the U.S. Securities and Exchange Commission (the “SEC”), including its Annual Report on Form 10-K for the fiscal year ended December 31, 2011, filed with the SEC on August 6, 2012, its Quarterly Reports on Form 10-Q, its Current Reports on Form 8-K, the Tender Offer Statement on Schedule TO and other tender offer documents to be

filed by Merger Sub, the Solicitation/Recommendation Statement on Schedule 14D-9 to be filed by the Company and the Proxy Statement on Schedule 14A to be filed by the Company. All of the materials related to the transaction (and all other transaction documents filed with the SEC) will be available at no charge from the SEC through its website at www.sec.gov. Investors and security holders may also obtain free copies of the documents filed by the Company with the SEC by contacting Company Investor Relations at 14400 N. 87th Street, Scottsdale, Arizona 85260, telephone number (480-308-3392) or mike.burnett@jda.com. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. The Company does not undertake any obligation to update any forward-looking statements as a result of new information, future developments or otherwise, except as expressly required by law.

Notice to Investors

The tender offer described in this report has not yet commenced. This report is neither an offer to purchase nor a solicitation of an offer to sell any securities. The solicitation and the offer to buy shares of Company common stock will be made pursuant to an offer to purchase and related materials that Merger Sub intends to file with the SEC. At the time the offer is commenced, Merger Sub will file a Tender Offer Statement on Schedule TO with the SEC, and thereafter the Company will file a Solicitation/Recommendation Statement on Schedule 14D-9 with respect to the offer. THE TENDER OFFER STATEMENT (INCLUDING AN OFFER TO PURCHASE, A RELATED LETTER OF TRANSMITTAL AND OTHER OFFER DOCUMENTS) AND THE SOLICITATION/RECOMMENDATION STATEMENT WILL CONTAIN IMPORTANT INFORMATION, AND INVESTORS AND STOCKHOLDERS OF THE COMPANY ARE URGED TO READ CAREFULLY AND CONSIDER THESE MATERIALS WHEN THEY BECOME AVAILABLE BEFORE MAKING ANY DECISION WITH RESPECT TO THE TENDER OFFER. In addition, all of these materials (and all other materials filed by the Company with the SEC) will be available at no charge from the SEC through its website at www.sec.gov. Investors and stockholders may also obtain free copies of the documents filed by the Company with the SEC by contacting Company Investor Relations at 14400 N. 87th Street, Scottsdale, Arizona 85260, telephone number (480-308-3392) or mike.burnett@jda.com.

Additional Information about the Merger and Where to Find It

This communication may be deemed to be proxy solicitation material in respect of the proposed acquisition of the Company by an affiliate of Parent. In connection with the potential one-step merger, the Company will file a Proxy Statement on Schedule 14A with the SEC. Additionally, the Company will file other relevant materials with the SEC in connection with the proposed acquisition of the Company pursuant to the terms of the Merger Agreement. THE PROXY STATEMENT AND OTHER RELEVANT MATERIALS WILL CONTAIN IMPORTANT INFORMATION, AND INVESTORS AND STOCKHOLDERS OF THE COMPANY ARE URGED TO READ CAREFULLY AND CONSIDER THESE MATERIALS WHEN THEY BECOME AVAILABLE BEFORE MAKING ANY VOTING OR INVESTMENT DECISION WITH RESPECT TO THE PROPOSED TRANSACTION. The materials to be filed by the Company with the SEC may be obtained free of charge at the SEC’s web site at www.sec.gov. After the Company’s filing thereof, investors and stockholders will also be able to obtain free copies of the Proxy Statement from the Company by contacting Company Investor Relations at 14400 N. 87th Street, Scottsdale, Arizona 85260, telephone number (480-308-3392) or mike.burnett@jda.com.

The Company and its directors, executive officers and other members of their management and employees, under the SEC rules, may be deemed to be participants in the solicitation of proxies of the Company’s stockholders in connection with the proposed transaction. Investors and stockholders may obtain more detailed information regarding the names, affiliations and interests of certain of the Company’s executive officers and directors in the solicitation by reading the Company’s proxy statement for its 2012 Annual Meeting of Stockholders, which was filed with the SEC on October 4, 2012, the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2011, which was filed with the SEC on August, 6, 2012, and the proxy statement and other relevant materials which may be filed with the SEC in connection with the transaction when and if they become available. Information concerning the interests of the Company’s potential participants, which may, in some cases, be different than those of the Company’s stockholders generally, will be set forth in the proxy statement relating to the transaction when it becomes available.

(d) Exhibits.

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.

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