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):

January 22, 2013

COLE CREDIT PROPERTY TRUST II, INC.

(Exact Name of Registrant as Specified in Charter)

Registrant’s telephone number, including area code: (602) 778-8700

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 Instructions A.2.):

Item 1.01. Entry into a Material Definitive Agreement

Merger Agreement

On January 22, 2013, Cole Credit Property Trust II, Inc., a Maryland corporation (the “Company”), Cole Operating Partnership II, LP, a Delaware limited partnership (the “Cole Partnership”), Spirit Realty Capital, Inc., a Maryland corporation (“Spirit”) and Spirit Realty, L.P., a Delaware limited partnership (the “Spirit Partnership”), entered into an Agreement and Plan of Merger (the “Merger Agreement”). The Merger Agreement provides for the merger of Spirit with and into the Company (the “Company Merger”) with the Company continuing as the surviving corporation (the “Surviving Corporation”) and the merger of the Cole Partnership with and into the Spirit Partnership (the “Partnership Merger” and together with the Company Merger, the “Mergers”) with the Spirit Partnership continuing as the surviving limited partnership (the “Surviving Limited Partnership”). A special committee of independent directors of the Company unanimously recommended the Mergers and the board of directors of the Company (the “Board”) has unanimously approved the Merger Agreement, the Mergers and the other transactions contemplated by the Merger Agreement.

Pursuant to the terms and subject to the conditions set forth in the Merger Agreement, at the effective time of the Company Merger (the “Company Merger Effective Time”), each outstanding share of common stock, par value $0.01 per share, of Spirit (“Spirit Common Stock”) will be converted into the right to receive 1.9048 (the “Exchange Ratio”) shares of common stock, par value $0.01 per share, of the Surviving Corporation (“Surviving Corporation Common Stock”). At and after the Company Merger Effective Time, each share of common stock, par value $0.01 per share, of the Company (“Company Common Stock”) issued and outstanding immediately prior to the Company Merger Effective Time shall remain outstanding. At the effective time of the Partnership Merger, (i) each outstanding partnership unit in the Cole Partnership (other than partnership units held by the Company, which shall cease to exist) shall automatically be converted into one validly issued share of Surviving Corporation Common Stock; (ii) each outstanding partnership unit in the Spirit Partnership shall remain outstanding; and (iii) the general partner interest of the Spirit Partnership shall constitute the only general partner interests in the Surviving Partnership.

Under the terms of the Merger Agreement, at the Company Merger Effective Time, the Surviving Corporation shall assume Spirit’s 2012 Incentive Award Plan (the “Plan”) and the number and kind of shares available for issuance under the Plan shall be converted into shares of Surviving Corporation Common Stock, after giving effect to the Exchange Ratio, in accordance with the provisions of the Plan. Similarly, all outstanding shares of Spirit Common Stock that are subject to vesting and other restrictions will convert into restricted shares of Surviving Corporation Common Stock, after giving effect to the Exchange Ratio, with the same terms and conditions as were applicable to such shares of Spirit Common Stock immediately prior to the Company Merger Effective Time.

The completion of the Company Merger is subject to customary conditions, including, among others: (i) approval by the holders of a majority of the outstanding shares of Spirit Common Stock; (ii) approval by the holders of a majority of the outstanding shares of Company Common Stock; (iii) the authorization of the listing on the New York Stock Exchange (the “NYSE”) of the Surviving Corporation Common Stock, including the Surviving Corporation Common Stock to be issued in connection with the Mergers; (iv) the registration statement on Form S-4 registering the applicable Surviving Corporation Common Stock to be issued as consideration for the Mergers having been declared effective by the Securities and Exchange Commission (the “SEC”); and (v) the obtaining of certain third party consents.

At the Company Merger Effective Time, the size of the board of directors of the Surviving Corporation will be set at nine, and all of the directors of Spirit immediately prior to the consummation of the Company Merger and up to two individuals designated by the Company and reasonably satisfactory to Spirit, will comprise the board of directors of the Surviving Corporation. In addition, at the Company Merger Effective Time, the charter and bylaws of the Surviving Corporation will be amended and restated to be substantially identical to the charter and bylaws of Spirit, as in effect immediately prior to the Company Merger Effective Time. The name of the Surviving Corporation shall be “Spirit Realty Capital, Inc.”

The Company and Spirit have made certain customary representations, warranties and covenants in the Merger Agreement. Each of the Company and Spirit is required, among other things: (i) subject to certain exceptions, to conduct its business in the ordinary course consistent with past practice during the interim period between the execution of the Merger Agreement and the consummation of the Mergers; and (ii) not to solicit alternative transactions, and, subject to certain exceptions, not to enter into discussions concerning, or provide confidential information in connection with, any alternative transaction. Each party has also agreed to use its reasonable best efforts to cause the Mergers to be consummated. In addition, subject to certain exceptions, the Merger Agreement requires each party to call and hold a special meeting of its stockholders and for the respective board of directors of each party to recommend that its stockholders approve the Company Merger and the transactions contemplated by the Merger Agreement.

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The Merger Agreement contains certain termination rights for both the Company and Spirit, including, among other bases for termination, if the Company Merger is not consummated on or before July 22, 2013 (subject to a two month extension under certain circumstances) and if the requisite approvals of either the stockholders of the Company or Spirit are not obtained. In addition, either party may choose to terminate the Merger Agreement under certain circumstances, including among others, if: (i) prior to its stockholder vote, the party receives a Superior Proposal, as defined in the Merger Agreement, and after providing the other party with adequate notice and paying the termination fee (as described below), the party enters into a definitive agreement in connection with such Superior Proposal; or (ii) the party’s board of directors changes its recommendation to its stockholders to vote in favor of the Company Merger as a result of an Intervening Event, as defined in the Merger Agreement, and contemporaneously such party pays the other party the termination fee. If no alternative acquisition proposal has been publicly announced prior to a party’s meeting of its stockholders and such party fails to obtain the approval of its stockholders, such party may be required to reimburse the other party’s transaction expenses (as described below). The Merger Agreement provides that, in connection with the termination of the Merger Agreement under specified circumstances, one party may be required to pay to the other a termination fee of $55,000,000 and/or reimburse the other party’s transaction expenses up to an amount equal to $10,000,000.

A copy of the Merger Agreement is attached hereto as Exhibit 2.1 and is incorporated herein by reference. The foregoing description of the Merger Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Merger Agreement. The Merger Agreement has been attached to provide investors with information regarding its terms. It is not intended to provide any other factual information about the Company or Spirit. In particular, the assertions embodied in the representations and warranties in the Merger Agreement were made as of a specified date, are modified or qualified by information in confidential disclosure letters provided by each party to the other in connection with the signing of the Merger Agreement, may be subject to a contractual standard of materiality different from what might be viewed as material to stockholders, or may have been used for the purpose of allocating risk between the parties. Accordingly, the representations and warranties in the Merger Agreement are not necessarily characterizations of the actual state of facts about the Company or Spirit at the time they were made or otherwise and should only be read in conjunction with the other information that the Company makes publicly available in reports, statements and other documents filed with the SEC.

Voting Agreements

Concurrently with the execution of the Merger Agreement, Macquarie Group (US) Holdings No. 1 Pty Ltd. (“Macquarie”), TPG-Axon Partners, LP (“TPG-AXON Partners”) and TPG-Axon Spirit Holdings Ltd. (“TPG-AXON Spirit”) have each entered into a voting agreement with Spirit and the Company and the Cole Partnership (each, a “Voting Agreement” and together, the “Voting Agreements”) pursuant to which each of Macquarie, TPG-AXON Partners and TPG-AXON Spirit, who together own approximately 15% of the currently outstanding shares of Spirit Common Stock, has agreed to vote its shares of Spirit Common Stock in favor of the Company Merger and the other transactions contemplated by the Merger Agreement, upon the terms and subject to the conditions set forth in such agreements. Each Voting Agreement terminates upon the earliest of: (i) the termination of the Merger Agreement; (ii) a change in recommendation by the board of directors of either the Company or Spirit; (iii) the acquisition of any shares of Spirit Common Stock by the Company or the Cole Partnership prior to the completion of the Mergers; and (iv) September 25, 2013.

A copy of the Macquarie Voting Agreement is attached hereto as Exhibit 99.1 and is incorporated herein by reference. A copy of the TPG-AXON Partners Voting Agreement is attached hereto as Exhibit 99.2 and is incorporated herein by reference. A copy of the TPG-AXON Spirit Voting Agreement is attached hereto as Exhibit 99.3 and is incorporated herein by reference. The foregoing description of the Voting Agreements does not purport to be complete and is qualified in its entirety by reference to the full text of such Voting Agreements.

Advisory and Property Management Matters Agreement

In connection with the Mergers, on January 22, 2013, the Company and the Company Partnership entered into an Advisory and Property Management Matters Agreement with Cole REIT Advisors II, LLC (the “Advisor”), Cole Realty Advisors, Inc. (f/k/a Fund Realty Advisors, Inc.) (the “Property Manager” and together with the Advisor, the “Advisor Parties”). Spirit is a signatory to the agreement as an express third party beneficiary. The agreement provides, among other things, that the Advisor Parties’ current agreements with the Company and the Cole Partnership will terminate upon closing of the Company Merger. The Advisor Parties will continue to be paid the asset management, property management and other fees payable pursuant to the current agreements, as applicable, for services rendered between the date of the Merger Agreement and the closing of the Mergers, but agree to waive any fees due upon the termination of their current agreements, including (i) any fees due upon listing of the Surviving Corporation Common Stock on the NYSE; (ii) any performance fees due upon the consummation of the Mergers; and (iii) any other fees that would be payable under the current agreements with respect to the Mergers (including any equity or debt financing transaction that occurs in connection with the consummation of the Mergers) and the other transactions contemplated in the Merger Agreement.

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A copy of the Advisory and Property Management Matters Agreement is attached hereto as Exhibit 99.4 and is incorporated herein by reference. The foregoing description of the Advisory and Property Management Matters Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Advisory and Property Management Matters Agreement.

Additional Information about the Proposed Transaction and Where to Find It

In connection with the proposed transaction, the Company expects to file with the SEC a registration statement on Form S-4 that will include a joint proxy statement of Spirit and the Company that also constitutes a prospectus of Spirit. The Company and Spirit also plan to file other relevant documents with the SEC regarding the proposed transaction. INVESTORS ARE URGED TO READ THE JOINT PROXY STATEMENT/PROSPECTUS AND OTHER RELEVANT DOCUMENTS FILED WITH THE SEC IF AND WHEN THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. You may obtain a free copy of the joint proxy statement/prospectus (if and when it becomes available) and other relevant documents filed by the Company and Spirit with the SEC at the SEC’s website at www.sec.gov. Copies of the documents filed by the Company with the SEC will be available free of charge by directing a written request to Cole Credit Property Trust II, Inc., 2325 East Camelback Road, Suite 1100, Phoenix, Arizona, 85016, Attention: Investor Relations. Copies of the documents filed by Spirit with the SEC will be available free of charge on Spirit’s website at www.spiritrealty.com or by directing a written request to Spirit Realty Capital, Inc., 16767 North Perimeter Drive, Suite 210, Scottsdale, Arizona 85260, Attention: Investor Relations.

The Company and Spirit and their respective directors and executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies in respect of the proposed transaction. You can find information about the Company’s executive officers and directors in the Company’s definitive proxy statement filed with the SEC on April 13, 2012. You can find information about Spirit’s executive officers and directors in Spirit’s final prospectus filed with the SEC on September 21, 2012. Additional information regarding the interests of such potential participants will be included in the joint proxy statement/prospectus and other relevant documents filed with the SEC if and when they become available. You may obtain free copies of these documents from the Company or Spirit using the sources indicated above.

This document shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the U.S. Securities Act of 1933, as amended.

Forward Looking Statements

In addition to historical information, this Current Report on Form 8-K (including information included or incorporated by reference herein) contains forward-looking statements within the meaning of Section 27A of the U.S. Securities Act of 1933, as amended, and Section 21E of the U.S. Securities Exchange Act of 1934, as amended. These forward-looking statements, which are based on current expectations, estimates and projections about the industry and markets in which the Company and Spirit operate and beliefs of and assumptions made by the Company management and Spirit management, involve risks and uncertainties that could significantly affect the financial results of the Company or Spirit or the combined company. Words such as “expects,” “anticipates,” “intends,” “plans,” “believes,” “projects,” “seeks,” “estimates,” variations of such words and similar expressions are intended to identify such forward-looking statements, which generally are not historical in nature. Such forward-looking statements include, but are not limited to, statements about the benefits of the business combination transaction involving the Company and Spirit, including future financial and operating results, the combined company’s plans, objectives, expectations and intentions. All statements that address operating performance, events or developments that we expect or anticipate will occur in the future — including statements relating to rent and occupancy growth, changes in sales or contribution volume of developed properties, general conditions in the geographic areas where we operate and the availability of capital — are forward-looking statements. These statements are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict. Although we believe the expectations reflected in any forward-looking statements are based on reasonable assumptions, we can give no assurance that our expectations will be attained and therefore, actual outcomes and results may differ materially from what is expressed or forecasted in such forward-looking statements. Some of the factors that may affect outcomes and results include, but are not limited to: (i) national, international, regional and local economic climates, (ii) changes in financial markets, interest rates, credit spreads, and foreign currency exchange rates, (iii) changes in the real estate markets, (iv) continued ability to source new investments, (v) increased or unanticipated competition for our properties, (vi) risks associated with acquisitions, (vii) maintenance of real estate investment trust status, (viii) availability of financing and capital, (ix) changes in demand for developed properties, (x) risks associated with achieving expected revenue synergies or cost savings, (xi) risks associated with the ability to consummate the merger and the timing of the closing of the merger, and (xii) those additional risks and factors discussed in reports filed with the SEC by the Company and Spirit from time to time. Neither the Company nor Spirit undertakes any duty to update and revise statements contained in these materials based on new information or otherwise.

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Item 9.01 Financial Statements and Exhibits.

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SIGNATURE

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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EXHIBIT INDEX

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