December 6, 2012 Dear Fellow Stockholder, You will soon receive proxy materials from American Realty Capital Trust, Inc. ("ARCT") regarding the Special Meeting of ARCT Stockholders scheduled for January 16, 2013. At the Special Meeting you will be asked to consider, and vote upon, a proposal to approve the merger and the other transactions contemplated by the merger agreement providing for the acquisition of ARCT by Realty Income Corporation. ARCT stockholders of record as of the close of business on December 6, 2012, are entitled to notice of, and to vote at, the Special Meeting. As detailed in the proxy materials and outlined below, your board of directors has concluded that the proposed merger with Realty Income is in the best interests of the Company and its stockholders and unanimously recommends you vote FOR the proposal to approve the merger. After thorough deliberation by your board of directors, with the assistance of the Company's independent financial and legal advisors, the Company has determined that a sale to Realty Income is the best way to continue delivering value to ARCT stockholders. We urge you to vote by telephone or via the Internet by following instructions on your WHITE proxy card, or please sign, date and return the enclosed WHITE proxy card today using the postage-paid envelope provided. Your vote is very important. Your board of directors recommends that stockholders vote today FOR the proposal to approve the merger with Realty Income. A failure to vote will have the same effect as a vote AGAINST the proposal to approve the merger and the other transactions contemplated by the merger agreement. YOUR BOARD OF DIRECTORS UNANIMOUSLY BELIEVES THAT THE PROPOSED ACQUISITION BY REALTY INCOME IS IN THE BEST INTERESTS OF ARCT AND ITS STOCKHOLDERS In making its recommendation, your board took into account a variety of factors described in the definitive proxy statement, including ARCT's pre-announcement and historical stock prices, forecasts of ARCT's future financial performance prepared by ARCT's management, and the financial analyses performed by Goldman, Sachs & Co., the Company's financial advisor, and summarized in the proxy statement. Your board also thoroughly considered various strategic alternatives, including remaining a stand-alone company, leveraged recapitalizations and other strategic transactions. In evaluating these other scenarios, your board determined that none of these alternatives was likely to lead to greater stockholder value than the Realty Income merger. The merger with Realty Income provides a number of compelling benefits to ARCT stockholders:* Permission to use quotations was neither sought nor obtained.
- ARCT Stockholders Will Own Shares In Realty Income, the Best-Performing Net Lease REIT Over a 40-Year Timeframe. As a result of the merger, you will receive common stock of one of the most attractive publicly traded net lease REITs in the sector. Realty Income has paid 509 consecutive monthly dividends since 1970, and it has increased its monthly dividend 68 times since its listing on the New York Stock Exchange in 1994. During that time, its annual dividend has increased from $0.90 per share to $1.82 , and there is potential for a dividend increase upon the closing of this transaction. Additionally, since Realty Income's listing on the NYSE in 1994, the compounded annual return to stockholders has been 17.8%, which is more than 5.9% points over the Dow Jones Industrial Average, Standard & Poor's 500, NASDAQ and FTSE NAREIT Index for the same period.  "For ARCT shareholders, the benefits include a decline in cost of and a greater access to capital, overhead savings, and partnering with the best in class management team with a track record of producing attractive shareholder returns and dividend growth." - JMP Securities research report, "Merger Overshadows 3Q Report; Maintain MP" - November 2, 2012.*
- The Combined Company Should Produce Substantial Earnings Growth, Driving Additional Stockholder Value. The combined company, which will be financially stronger than its competitors and have a lower cost of capital, will have a distinct advantage in the net lease sector and be poised to grow earnings while increasing dividends. The combined company's size and balance sheet strength will further facilitate the execution of large transactions through improved access to capital, and substantially enhance the combined company's ability to generate significant transaction volumes in the relatively fragmented net lease real estate market. As a result of the merger, ARCT stockholders stand to benefit from higher risk adjusted returns due to the greater stability and diversity of the combined property portfolio. While there are short-term tradeoffs for ARCT stockholders with respect to the dividend, the Company's Board and management strongly believe that the reduction in yield is far outweighed by the potential for growth and value creation in the combined company. ARCT's Board and management are confident in the future prospects of the combined company. ARCT's management will have an anticipated collective ownership of approximately $45 million in Realty Income stock following the close of the transaction, so their interests are firmly aligned with those of ARCT stockholders. "In all, through both a major acquisition like ARCT and the consistent level of acquisition activity on a quarterly basis, Realty Income is poised for substantial growth in our view."- RBC Capital Markets research report, "3Q Earnings Review: Operations, Acqs Strong; Raising 12/13 Est, Introducing '14" - October 29, 2012.*
MERGER WITH REALTY INCOME IS BEST OPTION TO CREATE VALUE FOR ARCT STOCKHOLDERS; ARCT HAS DEMONSTRATED ITS CONTINUING COMMITMENT TO MAXIMIZING STOCKHOLDER VALUE The decision by ARCT's board of directors to enter into a definitive agreement with Realty Income was made after the board had undertaken an extensive and thorough evaluation of strategic alternatives beginning in April 2011 . Through this process, with the assistance of Goldman Sachs, a number of options were evaluated thoroughly, including transforming ARCT into a publicly traded REIT.
- Realty Income is Valuing ARCT's Assets at a Price Significantly Higher Than What ARCT Paid for Them Originally, and the Multiple Paid is at the High End of Similar Net Lease Transactions.
- Low capitalization rate: On September 5, 2012, the implied offer value of $12.21 per share of ARCT common stock implied a weighted average capitalization rate for ARCT's assets of 6.1%, or 5.9% based on current cash rents. This is significantly below the weighted average capitalization rate of 8.2% at which ARCT aggregated its portfolio of assets. 58% of ARCT's assets (by acquisition volume) were purchased in 2011 and are already being sold at this much lower cap rate.
- High multiple relative to precedent transactions: At announcement, the transaction exchange ratio implied a forward FFO multiple of 14.4x for ARCT, which is at the high end of similar net lease public REIT sale transactions. 
- Expected Dividend Increase. Given the positive impact the transaction is expected to have on operating results, Realty Income anticipates that, upon closing, it will increase its dividend by approximately $0.13 per share, or 7.1%.
Consistent with its fiduciary duties, your board of directors has reviewed and will review any and all bona fide proposals that maximize stockholder value. The strategic alternatives review and sale process resulted in no other credible offers. No third party has contacted ARCT or Goldman Sachs regarding a possible strategic transaction since the announcement of the merger agreement with Realty Income. The ARCT board of directors does not believe it likely that another party will make or accept an offer to engage in a transaction with ARCT that would be more favorable to ARCT and its stockholders than the merger with Realty Income. Independent experts share the assessment of the ARCT board of directors: "In our view, O's deal for ARCT is an attractive one as it has the lowest capital costs in the public markets and we don't see better offers being out there for the enterprise."- JP Morgan research report, "3Q a Penny Shy of Our Estimate on Lighter Revenue; Deal Volume as Expected" - 25 October 2012.* THE PROPOSED MERGER WITH REALTY INCOME ELIMINATES THE RISKS INHERENT IN A STAND-ALONE STRATEGY The Realty Income merger will remove significant risks to ARCT stockholders. While ARCT believes that long-term fundamentals should remain intact for the net lease REIT sector, the ability to take advantage of opportunities in the sector could be challenged by our access to capital markets, industry competition and tenant concentration if ARCT were to remain an independent company. These challenges would include:
- During the process of evaluating strategic alternatives, over 40 parties were initially contacted regarding their interest in engaging in a strategic transaction with ARCT. Of the parties contacted, 18 (including nine REITs) executed confidentiality agreements and were provided access to ARCT's online data room. While six of these parties submitted non−binding indications of interest, none of the proposals valued ARCT at or above its initial public offering price of $10.00 per share, and several proposals related only to the acquisition of a portion of the ARCT portfolio.
- After reviewing the various alternatives, the ARCT board determined that none would result in a transaction that would maximize stockholder value. After careful deliberation, the board decided to list the Company on a national exchange, providing stockholders with the option to take full liquidity or to continue to own ARCT shares and benefit from the Company's anticipated growth and strong dividend. Accordingly, on March 1, 2012, ARCT internalized its management at no cost to stockholders, listed its shares of common stock on NASDAQ and commenced a self−tender offer for a portion of its outstanding shares of common stock.
- In August 2012, ARCT was approached by Realty Income to discuss a potential transaction. The two parties proceeded with negotiations. The resulting terms of the proposed merger represent an offer that provides ARCT stockholders with greater value than Realty Income's initial proposal received in February, 2012.
MAXIMIZE THE VALUE OF YOUR INVESTMENT IN ARCT – VOTE "FOR" THE PROPOSED MERGER WITH REALTY INCOME ON THE ENCLOSED PROXY CARD TODAY Given the comprehensive process undertaken by your board and its financial advisor, an evaluation of the Company's stand-alone plan, and the other factors described in the proxy statement, ARCT's board has unanimously determined that the Realty Income merger is in the best interests of ARCT and its stockholders, and unanimously recommends that ARCT stockholders vote FOR the proposed merger. YOUR VOTE IS IMPORTANT – PLEASE VOTE FOR THE REALTY INCOME TRANSACTION TODAY Your vote is extremely important, no matter how many shares you own. The affirmative vote of holders of a majority of ARCT's outstanding shares is required to approve the merger and the other transactions contemplated by the merger agreement. Please take a moment to vote FOR the proposal to approve the merger today – by telephone, by Internet or by signing, dating and returning the enclosed WHITE proxy card in the postage-paid envelope provided. If you have any questions or need assistance voting your shares, please call the Company's proxy solicitor, D.F. King & Co., Inc., toll free at 1-800-714-3305. Thank you for your support. On Behalf of the Board of Directors, /s/ Nicholas S. SchorschChairman
- Access to Capital Markets. Like most net lease REITs, our earnings and dividend growth depends in part on acquisition activity funded through the capital markets. In a worsening fiscal environment, ARCT's current sub-investment grade credit rating would put the Company at a disadvantage in accessing the capital markets. The combined company, however, is expected to have an investment grade credit rating ensuring access to multiple forms of capital that ARCT has not accessed as a public company, mitigating debt financing risk and ensuring that ARCT is well positioned to benefit from its external acquisition growth opportunities compared to peers with higher capital costs.
- Tenant Concentration Risk. Currently, 64% of our annualized base rents are derived from our top 15 tenants. The combined company will have a decreased top 15 tenant concentration of 42% and hence decreased reliance on rents from these top tenants. As a result, the loss of any one important tenant would have less of an impact on the combined company than on the stand-alone company.
- Greater Economies of Scale. The combined company should be able to achieve greater economies of scale than stand-alone ARCT by taking advantage of Realty Income's operating platform over a larger portfolio. Furthermore, the combined company will be the largest public triple net lease enterprise by over two times and will be well-positioned as a premier consolidator in the net lease sector.