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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

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FORM 10-K

Commission File Number: 1-13762

RECKSON OPERATING PARTNERSHIP, L.P.
(Exact name of registrant as specified in its charter)

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420 Lexington Avenue, New York, NY 10170
(Address of principal executive offices—Zip Code)

(212) 594-2700
(Registrant's telephone number, including area code)

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         SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT: None

         SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT: None

         Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ý     No o

         Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes o    No ý

         Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý    No o

         Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes o    No o

         Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ý

         Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See definitions of "large accelerated filer," "accelerated filer," and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

         Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes o    No ý

         As of March 18, 2009, no common units of limited partnership of the Registrant were held by non-affiliates of the Registrant. There is no established trading market for such units.

DOCUMENTS INCORPORATED BY REFERENCE

         Portions of the Definitive Proxy Statement of SL Green Realty Corp., the indirect parent of Registrant, for its 2010 Annual Meeting of Stockholders to be filed within 120 days after the end of the Registrant's fiscal year are incorporated by reference into Part III of this Annual Report on Form 10-K.

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Reckson Operating Partnership, L.P.
FORM 10-K
TABLE OF CONTENTS

10-K PART AND ITEM NO.

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PART I

ITEM 1.    BUSINESS

General

        Reckson Operating Partnership, L.P., or ROP, commenced operations on June 2, 1995. Reckson Associates Realty Corp., or RARC, served as the sole general partner until November 15, 2007, at which time RARC withdrew, and Wyoming Acquisitions GP LLC, or WAGP, succeeded it, as the sole general partner of ROP. WAGP is a wholly-owned subsidiary of SL Green Realty Corp., or SL Green. The sole limited partner of ROP is SL Green Operating Partnership, L.P., or the operating partnership.

        ROP is engaged in the ownership, management, operation and development of commercial real estate properties, principally office properties and also owns land for future development located in the New York City, Westchester and Connecticut, which collectively is also known as the New York Metro Area. At December 31, 2009, our inventory of development parcels aggregated approximately 81 acres of land in four separate parcels on which we can, based on estimates at December 31, 2009, develop approximately 1.1 million square feet of office space and in which we had invested approximately $65.1 million. In addition, at December 31, 2009 ROP also held approximately $27.0 million of structured finance investments.

        SL Green and the operating partnership were formed in June 1997. SL Green has qualified, and expects to qualify in the current fiscal year as a real estate investment trust, or REIT, under the Internal Revenue Code of 1986, as amended, or the Code, and operates as a self-administered, self-managed REIT. A REIT is a legal entity that holds real estate interests and, through payments of dividends to stockholders, is permitted to reduce or avoid the payment of Federal income taxes at the corporate level. Unless the context requires otherwise, all references to "we," "our" and "us" means ROP and all entities owned or controlled by ROP.

        On January 25, 2007, SL Green completed the acquisition of all of the outstanding shares of common stock of RARC pursuant to the terms of the Agreement and Plan of Merger, dated as of August 3, 2006, as amended, the Merger Agreement, among SL Green, Wyoming Acquisition Corp., or Wyoming, Wyoming Acquisition GP LLC, Wyoming Acquisition Partnership LP, RARC and ROP. We paid approximately $6.0 billion, inclusive of transaction costs, for Reckson. This transaction is referred to herein as the Merger.

        On January 25, 2007, SL Green completed the sale, or Asset Sale, of certain assets of ROP to an investment group led by certain of RARC's former executive management, or the Buyer, for a total consideration of approximately $2.0 billion.

        As of December 31, 2009, we owned the following interests in commercial office properties in the New York Metro area, primarily in midtown Manhattan, a borough of New York City, or Manhattan. Our investments in the New York Metro area also include investments in Queens, Westchester County and Connecticut, which are collectively known as the Suburban assets:

        As of December 31, 2009, our Manhattan properties were comprised of fee ownership (three properties) and leasehold ownership (one property). We are responsible for not only collecting rent from subtenants, but also maintaining the property and paying expenses relating to the property. As of December 31, 2009, our Suburban

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properties were comprised of fee ownership (16 properties) and leasehold ownership (one property). We refer to our Manhattan and Suburban properties collectively as our portfolio.

        Our corporate offices are located in midtown Manhattan at 420 Lexington Avenue, New York, New York 10170. As of December 31, 2009, our corporate staff consisted of approximately 237 persons, including 182 professionals experienced in all aspects of commercial real estate. We can be contacted at (212) 594-2700. Our indirect parent entity, SL Green, maintains a website at www.slgreen.com. On this website, you can obtain, free of charge, a copy of our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, as soon as practicable after we file such material electronically with, or furnish it to, the Securities and Exchange Commission, or the SEC. SL Green has also made available on its website its audit committee charter, compensation committee charter, corporate governance and nominating committee charter, code of business conduct and ethics and corporate governance principles. You can also read and copy any materials we file with the SEC at its Public Reference Room at 100 F Street, NE, Washington, DC 20549 (1-800-SEC-0330). The SEC maintains an Internet site (http://www.sec.gov) that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

Business Strategies and Growth Opportunities

        On January 25, 2007, ROP was acquired by SL Green. See Item 1 "Business—Business and Growth Strategies" in SL Green's Annual Report on Form 10-K for the year ended December 31, 2009 for a complete description of SL Green's business and growth strategies.

Competition

        The leasing of real estate is highly competitive, especially in the Manhattan office market. Although currently no other publicly traded REIT has been formed primarily to acquire, own, reposition and manage Manhattan commercial office properties, we may in the future compete with such other REITs. We compete for tenants with landlords and developers of similar properties located in our markets primarily on the basis of location, rent charged, services provided, and the design and condition of our properties. In addition, we face competition from other real estate funds, domestic and foreign financial institutions, life insurance companies, pension trusts, partnerships, individual investors and others that may have greater financial resources or access to capital than we do or that are willing to acquire properties in transactions which are more highly leveraged or are less attractive from a financial viewpoint than we are willing to pursue.

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ITEM 1A.    RISK FACTORS

        We encourage you to read "Item 1A—Risk Factors" in the Annual Report on Form 10-K for SL Green Realty Corp., our 100% indirect parent company, for the year ended December 31, 2009.

Declines in the demand for office space in New York City, and in particular, in midtown Manhattan as well as our suburban markets, including Westchester County, Connecticut, and Long Island City, resulting from general economic conditions could adversely affect the value of our real estate portfolio and our results of operations and, consequently, our ability to service current debt and make distributions to SL Green.

        Most of our commercial office properties, based on square feet, are located in midtown Manhattan. As a result, our business is dependent on the condition of the New York City economy in general and the market for office space in midtown Manhattan, in particular. Weakness in the New York City economy could materially reduce the value of our real estate portfolio and our rental revenues, and thus adversely affect our ability to service current debt and to make distributions to SL Green. The Manhattan vacancy rate ended 2009 at 12% after reaching a high of 13.4% in October 2009. We could also be impacted by weakness in our Suburban markets, including Westchester County, Connecticut and Long Island City.

We may be unable to renew leases or relet space as leases expire.

        When our tenants decide not to renew their leases upon their expiration, we may not be able to relet the space. Even if tenants do renew or we can relet the space, the terms of renewal or reletting, including the cost of required renovations, may be less favorable than current lease terms. Over the next five years, through the end of 2014, leases will expire on approximately 46.1% and none of the rentable square feet at our consolidated properties and unconsolidated joint venture property, respectively. As of December 31, 2009, approximately 2.7 million and no square feet are scheduled to expire by December 31, 2014 at our consolidated properties and unconsolidated joint venture property, respectively, and these leases currently have annualized escalated rental income totaling approximately $113.0 million and none, respectively. If we are unable to promptly renew the leases or relet this space at similar rates, our cash flow and ability to service debt and make distributions to SL Green would be adversely affected.

The expiration of long term leases or operating sublease interests could adversely affect our results of operations.

        Our interest in our commercial office properties located at 1185 Avenue of the Americas, New York and 1055 Washington Avenue, Connecticut are through long-term leasehold interests in the land and the improvements, rather than by a fee interest in the land. Unless we can purchase a fee interest in the underlying land or extend the terms of these leases before their expiration, we will lose our right to operate these properties and our interest in the improvements upon expiration of the lease, which would significantly adversely affect our results of operations. The remaining term of these long-term leases, including our unilateral extension rights is approximately 58 years. Pursuant to the leasehold arrangement, we, as tenant under the operating sublease, perform the functions traditionally performed by landlords with respect to our subtenants. We are responsible for not only collecting rent from our subtenants, but also maintaining the property and paying expenses relating to the property. Our share of annualized escalated rental income of this property at December 31, 2009 totaled approximately $76.6 million, or 29%, of our share of total portfolio annualized revenue associated with our portfolio.

Our results of operations rely on major tenants, including in the financial services sector, and insolvency, bankruptcy or receivership of these and other tenants could adversely affect our results of operations.

        Giving effect to leases in effect as of December 31, 2009 for consolidated properties and unconsolidated joint venture properties as of that date, our five largest tenants, based on square footage leased, accounted for approximately 23.7% of our share of portfolio annualized rent, and, other than three tenants, Citigroup, Inc. (and its affiliates), Debevoise & Plimpton, LLP and Verizon who accounted for approximately 6.6%, 7.1% and 3.0% of

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our share of portfolio annualized rent, respectively, no tenant accounted for more than 4.2% of that total. The financial services sector is currently experiencing significant turmoil which has resulted in significant job losses. Of our ten largest tenants based on square feet leased, which accounted for approximately 36.6% of our share of portfolio annualized rent, 46% (inclusive of lease guarantors) carry an investment grade credit rating. If current economic conditions persist or deteriorate, we may experience increases in past due accounts, defaults, lower occupancy and reduced effective rents, particularly in respect of our financial service tenants. Our business would be adversely affected if any of our major tenants or any other tenants became insolvent, declared bankruptcy, are put into receivership or otherwise refused to pay rent in a timely fashion or at all.

Adverse economic and geopolitical conditions in general and the Northeastern commercial office markets in particular could have a material adverse effect on our results of operations, financial condition and our ability to pay dividends to stockholders.

        Our business may be affected by the unprecedented volatility and illiquidity in the financial and credit markets, the general global economic recession, and other market or economic challenges experienced by the U.S. economy or real estate industry as a whole. Our business may also be adversely affected by local economic conditions, as substantially all of our revenues are derived from our properties located in the Northeast, particularly in New York, Westchester County and Connecticut. Because our portfolio consists primarily of commercial office buildings (as compared to a more diversified real estate portfolio) located principally in Manhattan, if economic conditions persist or deteriorate, then our results of operations, financial condition and ability to service current debt and to pay distributions to our stockholders may be adversely affected by the following, among other potential conditions:

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significant job losses in the financial and professional services industries have occurred and may continue to occur, which may decrease demand for our office space, causing market rental rates and property values to be negatively impacted;



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our ability to borrow on terms and conditions that we find acceptable, or at all, may be limited, which could reduce our ability to pursue acquisition and development opportunities and refinance existing debt, reduce our returns from both our existing operations and our acquisition and development activities and increase our future interest expense;



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reduced values of our properties may limit our ability to dispose of assets at attractive prices or to obtain debt financing secured by our properties and may reduce the availability of unsecured loans; and



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reduced liquidity in debt markets and increased credit risk premiums for certain market participants may impair our ability to access capital.

        These conditions, which could have a material adverse effect on our results of operations, financial condition and ability to pay distributions, may continue or worsen in the future.

We may suffer adverse consequences if our revenues decline since our operating costs do not necessarily decline in proportion to our revenue.

        We earn a significant portion of our income from renting our properties. Our operating costs, however, do not necessarily fluctuate in relation to changes in our rental revenue. This means that our costs will not necessarily decline even if our revenues do. Our operating costs could also increase while our revenues do not. If our operating costs increase but our rental revenues do not, we may be forced to borrow to cover our costs, we may incur losses and we may not have cash available for distributions to SL Green.

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We face risks associated with property acquisitions.

        We may acquire individual properties and portfolios of properties. Our acquisition activities and their success may be exposed to the following risks:

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even if we enter into an acquisition agreement for a property, it is usually subject to customary conditions to closing, including due diligence investigations to our satisfaction;



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we may be unable to finance acquisitions on favorable terms or at all;



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acquired properties may fail to perform as we expected;



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our estimates of the costs of repositioning or redeveloping acquired properties may be inaccurate;



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we may not be able to obtain adequate insurance coverage for new properties;



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acquired properties may be located in new markets where we may face risks associated with a lack of market knowledge or understanding of the local economy, lack of business relationships in the area and unfamiliarity with local governmental and permitting procedures; and



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we may be unable to quickly and efficiently integrate new acquisitions, particularly acquisitions of portfolios of properties, into our existing operations, and as a result our results of operations and financial condition could be adversely affected.

        We may acquire properties subject to liabilities and without any recourse, or with only limited recourse, with respect to unknown liabilities. As a result, if a liability were asserted against us based upon those properties, we might have to pay substantial sums to settle it, which could adversely affect our cash flow. Unknown liabilities with respect to properties acquired might include:

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liabilities for clean-up of undisclosed environmental contamination;



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claims by tenants, vendors or other persons dealing with the former owners of the properties;



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liabilities incurred in the ordinary course of business; and



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claims for indemnification by general partners, directors, officers and others indemnified by the former owners of the properties.

Competition for acquisitions may reduce the number of acquisition opportunities available to us and increase the costs of those acquisitions.

        We may continue to acquire properties as we are presented with attractive opportunities. We may face competition for acquisition opportunities with other investors, particularly private investors who can incur more leverage, and this competition may adversely affect us by subjecting us to the following risks:

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an inability to acquire a desired property because of competition from other well-capitalized real estate investors, including publicly traded and privately held REITs, private real estate funds, domestic and foreign financial institutions, life insurance companies, sovereign wealth funds, pension trusts, partnerships and individual investors; and



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an increase in the purchase price for such acquisition property, in the event we are able to acquire such desired property.

We rely on four large properties for a significant portion of our revenue.

        As of December 31, 2009, four of our properties, 1185 Avenue of the Americas, 919 Third Avenue, 810 Seventh Avenue and 1350 Avenue of the Americas, accounted for approximately 69% of our portfolio annualized rent, including our share of joint venture annualized rent, and 1185 Avenue of the Americas alone accounted for approximately 27% of our portfolio annualized rent, including our share of joint venture annualized rent. Our

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revenue and cash available for distribution to SL Green would be materially adversely affected if the ground lease for the 1185 Avenue of the Americas property were terminated for any reason or if one or all of these properties were materially damaged or destroyed. Additionally, our revenue and cash available for distribution to SL Green would be materially adversely affected if our tenants at these properties experienced a downturn in their business which may weaken their financial condition and result in their failure to timely make rental payments, defaulting under their leases or filing for bankruptcy.

The continuing threat of terrorist attacks may adversely affect the value of our properties and our ability to generate cash flow.

        There may be a decrease in demand for space in New York City because it is considered at risk for future terrorist attacks, and this decrease may reduce our revenues from property rentals. In the aftermath of a terrorist attack, tenants in the New York City area may choose to relocate their business to less populated, lower-profile areas of the United States that are not as likely to be targets of future terrorist activity. This in turn would trigger a decrease in the demand for space in the New York City area, which could increase vacancies in our properties and force us to lease our properties on less favorable terms. As a result, the value of our properties and the level of our revenues could materially decline.

A terrorist attack could cause insurance premiums to increase significantly.

        SL Green maintains "all-risk" property and rental value coverage (including coverage regarding the perils of flood, earthquake and terrorism) within two property insurance portfolios and liability insurance. This includes the ROP assets. The first property portfolio maintains a blanket limit of $600.0 million per occurrence for the majority of the New York City properties in our portfolio with a sub-limit of $450.0 million for acts of terrorism. This policy expires on December 31, 2010. The second portfolio maintains a limit of $600.0 million per occurrence, including terrorism, for a few New York City properties and the majority of the Suburban properties. The second property policy expires on December 31, 2010. Additional coverage may be purchased on a stand alone basis for certain assets. The liability policies cover all our properties and provide limits of $200.0 million per property. The liability policies expire on October 31, 2010.

        In October 2006, SL Green formed a wholly-owned taxable REIT subsidiary, Belmont Insurance Company, or Belmont, to act as a captive insurance company and be one of the elements of our overall insurance program Belmont was formed in an effort to, among other reasons, stabilize to some extent the fluctuations of insurance market conditions. Belmont is licensed in New York to write Terrorism, NBCR (nuclear, biological, chemical, and radiological), General Liability, Environmental Liability and D&O coverage.

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Terrorism: Belmont acts as a direct property insurer with respect to a portion of our terrorism coverage for the New York City properties. Effective September 1, 2009 Belmont increased its terrorism coverage from $250 million to $400 million in an upper layer. In addition, Belmont purchased reinsurance to reinsure the retained insurable risk not otherwise covered under Terrorism Risk Insurance Program Reauthorization and Extension Act of 2007 (TRIPRA), as detailed below.



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NBCR: Belmont acts as a direct insurer of NBCR coverage up to $250 million on the entire property portfolio.



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General Liability: Belmont insures a deductible on the general liability insurance with a $150,000 deductible per occurrence and a $2.2 million annual aggregate stop loss limit. SL Green has secured an excess insurer to protect against catastrophic liability losses above the $150,000 deductible per occurrence and a stop loss if aggregate claims exceed $2.2 million. Belmont has retained a third party administrator to manage all claims within the deductible and we anticipate that direct management of liability claims will improve loss experience and ultimately lower the cost of liability insurance in future years. In addition, SL Green has an umbrella liability policy of $200.0 million.

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Environmental Liability: Belmont insures a deductible of $1 million per occurrence on a $30 million environmental liability policy covering the entire portfolio.

        TRIA, which was enacted in November 2002, was renewed on December 31, 2007. Congress extended TRIA, now called TRIPRA (Terrorism Risk Insurance Program Reauthorization and Extension Act of 2007) until December 31, 2014. The law extends the federal Terrorism Insurance Program that requires insurance companies to offer terrorism coverage and provides for compensation for insured losses resulting from acts of foreign and domestic terrorism. Our debt instruments, consisting of mortgage loans secured by our properties (which are generally non-recourse to us), mezzanine loans, ground leases and SL Green's 2007 unsecured revolving credit facility, contain customary covenants requiring us to maintain insurance. There can be no assurance that the lenders or ground lessors under these instruments will not take the position that a total or partial exclusion from "all-risk" insurance coverage for losses due to terrorist acts is a breach of these debt and ground lease instruments that allows the lenders or ground lessors to declare an event of default and accelerate repayment of debt or recapture of ground lease positions. In addition, if lenders insist on full coverage for these risks and prevail in asserting that we are required to maintain such coverage, it could result in substantially higher insurance premiums.

Our dependence on smaller and growth-oriented businesses to rent our office space could adversely affect our cash flow and results of operations.

        Many of the tenants in our properties are smaller, growth-oriented businesses that may not have the financial strength of larger corporate tenants. Smaller companies generally experience a higher rate of failure than large businesses. Growth-oriented firms may also seek other office space, including Class A space, as they develop. Dependence on these companies could create a higher risk of tenant defaults, turnover and bankruptcies, which could adversely affect our distributable cash flow and results of operations.

Recent turmoil in the credit markets could affect our ability to obtain debt financing on reasonable terms.

        The U.S. credit markets have recently experienced significant dislocations and liquidity disruptions which have caused the spreads on prospective debt financings to widen considerably. Continued turmoil in the credit markets may negatively impact our ability to access additional debt financing at reasonable terms, which may negatively affect investment returns on future acquisitions or our ability to make acquisitions.

Debt financing, financial covenants, degree of leverage, and increases in interest rates could adversely affect our economic performance.

Scheduled debt payments could adversely affect our results of operations.

        The total principal amount of our outstanding consolidated indebtedness was approximately $0.9 billion as of December 31, 2009, consisting of approximately $0.7 billion under our senior unsecured notes and convertible bonds, and approximately $0.2 billion of non-recourse mortgage loan on one of our properties. As of December 31, 2009, the total principal amount of non-recourse indebtedness outstanding at our joint venture property was approximately $315.0 million, of which our proportionate share was approximately $94.5 million. Cash flow could be insufficient to pay distributions at expected levels and meet the payments of principal and interest required under our current mortgage indebtedness, senior unsecured notes and indebtedness outstanding at our joint venture properties.

        If we are unable to make payments under our senior unsecured notes, the principal and unpaid interest will become immediately payable. If a property is mortgaged to secure payment of indebtedness and we are unable to meet mortgage payments, the mortgagee could foreclose on the property, resulting in loss of income and asset value. Foreclosure on mortgaged properties or an inability to make payments under our unsecured notes would have a negative impact on our financial condition and results of operations.

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        We may not be able to refinance existing indebtedness, which in all cases requires substantial principal payments at maturity. In 2010, none of the debt on either of our consolidated properties or our unconsolidated joint venture property, respectively, will mature. However, we have the right to call our 4% exchangeable bonds in June 2010. At the present time, we intend to exercise extension options or refinance the debt associated with our properties on or prior to their respective maturity dates. If any principal payments due at maturity cannot be refinanced, extended or paid with proceeds of other capital transactions, such as new equity or debt capital, our cash flow will not be sufficient in all years to repay all maturing debt. At the time of refinancing, prevailing interest rates or other factors, such as the possible reluctance of lenders to make commercial real estate loans may result in higher interest rates. Increased interest expense on the refinanced debt would adversely affect cash flow and our ability to service debt and make distributions to SL Green.

Financial covenants could adversely affect our ability to conduct our business.

        The mortgages on our properties contain customary negative covenants that limit our ability to further mortgage the property, to enter into new leases or materially modify existing leases, and to discontinue insurance coverage. The terms of our senior unsecured notes include certain restrictions and covenants which limit, among other things, the incurrence of additional indebtedness and liens, and which require compliance with financial ratios relating to the minimum amount of debt service coverage, the maximum amount of consolidated unsecured and secured indebtedness and the minimum amount of unencumbered assets. These restrictions could adversely affect our results of operations and our ability to make distributions to SL Green.

Rising interest rates could adversely affect our cash flow.

        We may incur indebtedness in the future that bears interest at a variable rate or may be required to refinance our debt at higher rates. Accordingly, increases in interest rates above that which we anticipated based upon historical trends could adversely affect our ability to continue to make distributions to stockholders. At December 31, 2009, we had no variable rate borrowings.

Failure to hedge effectively against interest rate changes may adversely affect results of operations.

        The interest rate hedge instruments we may use to manage some of our exposure to interest rate volatility involve risk, such as the risk that counterparties may fail to honor their obligations under these arrangements. In addition, these arrangements may not be effective in reducing our exposure to interest rate changes. Failure to hedge effectively against interest rate changes may adversely affect our results of operations.

No limitation on debt could adversely affect our cash flow.

        Our organizational documents do not contain any limitation on the amount of indebtedness we may incur. If we become more highly leveraged, an increase in debt service could adversely affect cash available for distribution to SL Green and could increase the risk of default on our indebtedness. In addition, any change that increases SL Green's debt to market capitalization percentage could be viewed negatively by investors. As a result, SL Green's share price could decrease. SL Green's market capitalization is variable and does not necessarily reflect the fair market value of its assets at all times. SL Green also considers factors other than market capitalization in making decisions regarding the incurrence of indebtedness, such as the purchase price of properties to be acquired with debt financing, the estimated market value of our properties upon refinancing and the ability of particular properties and our business as a whole to generate cash flow to cover expected debt service.

Structured finance investments could cause us to incur expenses, which could adversely affect our results of operations.

        We owned three mezzanine and other loans with an aggregate book value of approximately $27.0 million at December 31, 2009. Such investments may or may not be recourse obligations of the borrower and are not insured or guaranteed by governmental agencies or otherwise. In the event of a default under these obligations, we may

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have to realize upon our collateral and thereafter make substantial improvements or repairs to the underlying real estate in order to maximize the property's investment potential. Borrowers may contest enforcement of foreclosure or other remedies, seek bankruptcy protection against such enforcement and/or bring claims for lender liability in response to actions to enforce their obligation to us. Relatively high loan-to-value ratios and declines in the value of the property may prevent us from realizing an amount equal to our investment upon foreclosure or realization.

        We evaluate the collectability of both interest and principal of each of our loans, if circumstances warrant, to determine whether they are impaired. A loan is impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due according to the existing contractual terms. When a loan is impaired, the amount of the loss accrual is calculated by comparing the carrying amount of the investment to the value determined by discounting the expected future cash flows at the loan's effective interest rate or, as a practical expedient, to the value of the collateral if the loan is collateral dependent. There can be no assurance that our estimates of collectible amounts will not change over time or that they will be representative of the amounts we actually collect, including amounts we would collect if we chose to sell these investments before their maturity. If we collect less than our estimates, we will record charges which could be material. We maintain and regularly evaluate financial reserves to protect against potential future losses. Our reserves reflect management's judgment of the probability and severity of losses. We cannot be certain that our judgment will prove to be correct and that reserves will be adequate over time to protect against potential future losses because of unanticipated adverse changes in the economy or events adversely affecting specific properties, assets, tenants, borrowers, industries in which our tenants and borrowers operate or markets in which our tenants and borrowers or their properties are located. We believe the increase in our non-performing loans has been driven by the recent credit crisis, which have adversely impacted the ability of many of our borrowers to service their debt and refinance our loans to them at maturity. We have increased our provision for loan losses in 2008 and 2009 based upon the performance of our assets and conditions in the financial markets and overall economy, which deteriorated precipitously in the fourth quarter of 2008. If our reserves for credit losses prove inadequate, we could suffer losses which would have a material adverse affect on our financial performance, the market prices of our securities and our ability to make distributions.

Joint investments could be adversely affected by our lack of sole decision-making authority and reliance upon a co-venturer's financial condition.

        We co-invest with third parties through partnerships, joint ventures, co-tenancies or other entities, acquiring non-controlling interests in, or sharing responsibility for managing the affairs of, a property, partnership, joint venture, co-tenancy or other entity. Therefore, we will not be in a position to exercise sole decision-making authority regarding that property, partnership, joint venture or other entity. Investments in partnerships, joint ventures, or other entities may involve risks not present were a third party not involved, including the possibility that our partners, co-tenants or co-venturers might become bankrupt or otherwise fail to fund their share of required capital contributions. Additionally, our partners or co-venturers might at any time have economic or other business interests or goals, which are inconsistent with our business interests or goals. These investments may also have the potential risk of impasses on decisions such as a sale, because neither we nor the partner, co-tenant or co-venturer would have full control over the partnership or joint venture. Consequently, actions by such partner, co-tenant or co-venturer might result in subjecting properties owned by the partnership or joint venture to additional risk. In addition, we may in specific circumstances be liable for the actions of our third-party partners, co-tenants or co-venturers. As of December 31, 2009, our unconsolidated joint venture owned one property and we had an aggregate cost basis in the joint venture totaling approximately $51.3 million. As of December 31, 2009, our share of unconsolidated joint venture debt totaled approximately $94.5 million.

Our joint venture agreements may contain terms in favor of our partners that could have an adverse effect on the value of our investments in the joint ventures.

        Each of our joint venture agreements has been individually negotiated with our partner in the joint venture and, in some cases, we have agreed to terms that are favorable to our partner in the joint venture. For example,

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our partner may be entitled to a specified portion of the profits of the joint venture before we are entitled to any portion of such profits and our partner may have rights to buy our interest in the joint venture, to force us to buy the partner's interest in the joint venture or to compel the sale of the property owned by such joint venture. These rights may permit our partner in a particular joint venture to obtain a greater benefit from the value or profits of the joint venture than us, which could have an adverse effect on the value of our investment in the joint venture and on our financial condition and results of operations. We may also enter into similar arrangements in the future.

We are subject to possible environmental liabilities and other possible liabilities.

        We are subject to various federal, state and local environmental laws. These laws regulate our use, storage, disposal and management of hazardous substances and wastes and can impose liability on property owners or operators for the clean-up of certain hazardous substances released on a property and any associated damage to natural resources without regard to whether the release was legal or whether it was caused by the property owner or operator. The presence of hazardous substances on our properties may adversely affect occupancy and our ability to develop or sell or borrow against those properties. In addition to potential liability for clean-up costs, private plaintiffs may bring claims for personal injury, property damage or for similar reasons. Various laws also impose liability for the clean-up of contamination at any facility (e.g., a landfill) to which we have sent hazardous substances for treatment or disposal, without regard to whether the materials were transported, treated and disposed in accordance with law.

We may incur significant costs complying with the Americans with Disabilities Act and similar laws.

        Our properties may be subject to other risks relating to current or future laws including laws benefiting disabled persons, and other state or local zoning, construction or other regulations. These laws may require significant property modifications in the future for which we may not have budgeted and could result in fines being levied against us. The occurrence of any of these events could have an adverse impact on our cash flows and ability to make distributions to stockholders.

        Under the Americans with Disabilities Act, or ADA, all public accommodations must meet federal requirements related to access and use by disabled persons. Additional federal, state and local laws also may require modifications to our properties, or restrict our ability to renovate our properties. We have not conducted an audit or investigation of all of our properties to determine our compliance. If one or more of our properties is not in compliance with the ADA or other legislation, then we would be required to incur additional costs to bring the property into compliance. We cannot predict the ultimate amount of the cost of compliance with ADA or other legislation. If we incur substantial costs to comply with the ADA and any other legislation, our financial condition, results of operations and cash flow and/or ability to satisfy our debt service obligations and to pay dividends to our stockholders could be adversely affected.

We face potential conflicts of interest.

Members of management may have a conflict of interest over whether to enforce terms of agreements with entities with which senior management, directly or indirectly, has an affiliation.

        Through Alliance Building Services, or Alliance, First Quality Maintenance, L.P., or First Quality, provides cleaning, extermination and related services, Classic Security LLC provides security services, Bright Star Couriers LLC provides messenger services, and Onyx Restoration Works provides restoration services with respect to certain properties owned by us. Alliance is owned by Gary Green, a son of Stephen L. Green, the chairman of SL Green's board of directors. SL Green and its tenants accounted for approximately 23.7% of Alliance's 2009 total revenue. The contracts pursuant to which these services are provided are not the result of arm's length negotiations and, therefore, there can be no assurance that the terms and conditions are not less favorable than those which could be obtained from third parties providing comparable services. In addition, to the extent that we choose to enforce our rights under any of these agreements, we may determine to pursue available remedies, such

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as actions for damages or injunctive relief, less vigorously than we otherwise might because of our desire to maintain our ongoing relationship with the individual involved.

        As of December 31, 2009, services were being provided by these entities to 11 of the properties owned by ROP.

Members of management may have a conflict of interest over whether to enforce terms of senior management's employment and non-competition agreements.

        Stephen Green, Marc Holliday, Gregory Hughes, Andrew Levine and Andrew Mathias entered into employment and noncompetition agreements with SL Green pursuant to which they have agreed not to actively engage in the acquisition, development or operation of office real estate in the New York City metropolitan area. For the most part these restrictions apply to the executive both during his employment and for a period of time thereafter. Each executive is also prohibited from otherwise disrupting or interfering with our business through the solicitation of our employees or clients or otherwise. To the extent that SL Green chooses to enforce its rights under any of these agreements, SL Green may determine to pursue available remedies, such as actions for damages or injunctive relief, less vigorously than we otherwise might because of its desire to maintain its ongoing relationship with the individual involved. Additionally, the non-competition provisions of these agreements despite being limited in scope and duration, could be difficult to enforce, or may be subject to limited enforcement, should litigation arise over them in the future. Mr. Green has interests in two properties in Manhattan, which are exempt from the non-competition provisions of his employment and non-competition agreement.

SL Green's failure to qualify as a REIT would be costly.

        We believe that SL Green has operated in a manner to qualify as a REIT for federal income tax purposes and SL Green intends to continue to so operate. Many of these requirements, however, are highly technical and complex. The determination that SL Green is a REIT requires an analysis of factual matters and circumstances. These matters, some of which may not be totally within SL Green's control, can affect its qualification as a REIT. For example, to qualify as a REIT, at least 95% of SL Green's gross income must come from designated sources that are listed in the REIT tax laws. SL Green is also required to distribute to stockholders at least 90% of its REIT taxable income excluding capital gains. The fact that SL Green holds its assets through subsidiaries further complicates the application of the REIT requirements. Even a technical or inadvertent mistake could jeopardize SL Green's REIT status. Furthermore, Congress and the Internal Revenue Service, which we refer to as the IRS, might make changes to the tax laws and regulations, and the courts might issue new rulings that make it more difficult, or impossible, for SL Green to remain qualified as a REIT.

        If SL Green fails to qualify as a REIT, it would be subject to federal income tax at regular corporate rates. Also, unless the IRS grants SL Green relief under specific statutory provisions, it would remain disqualified as a REIT for four years following the year it first failed to qualify. If SL Green failed to qualify as a REIT, it would have to pay significant income taxes and ROP would therefore have less money available to service indebtedness.

SL Green would incur adverse tax consequences if RARC failed to qualify as a REIT.

        SL Green has assumed that RARC has historically qualified as a REIT for United States federal income tax purposes and that SL Green will continue to be able to qualify as a REIT following the Merger. However, if RARC failed to qualify as a REIT, SL Green generally would have succeeded to significant tax liabilities (including the significant tax liability that would result from a deemed sale of assets by RARC pursuant to the Merger).

We face significant competition for tenants.

        The leasing of real estate is highly competitive. The principal means of competition are rent charged, location, services provided and the nature and condition of the facility to be leased. We directly compete with all lessors and developers of similar space in the areas in which our properties are located. Demand for retail space

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has been impacted by the recent bankruptcy of a number of retail companies and a general trend toward consolidation in the retail industry, which could adversely affect the ability of our company to attract and retain tenants.

        Our commercial office properties are concentrated in highly developed areas of midtown Manhattan and certain Suburban central business districts, or CBDs. Manhattan is the largest office market in the United States. The number of competitive office properties in Manhattan and CBDs in which our Suburban properties are located (which may be newer or better located than our properties) could have a material adverse effect on our ability to lease office space at our properties, and on the effective rents we are able to charge.

Loss of our key personnel could harm our operations.

        We are dependent on the efforts of Stephen L. Green, the chairman of the board of directors of SL Green and an executive officer, Marc Holliday, the chief executive officer of SL Green and president of WAGP, Andrew Mathias, the president and chief investment officer of SL Green and Gregory F. Hughes, the chief operating officer and chief financial officer of SL Green and the treasurer of WAGP. These officers have employment agreements which expire in December 2010, January 2013, December 2010 and June 2010, respectively. A loss of the services of any of these individuals could adversely affect our operations.

Our business and operations would suffer in the event of system failures.

        Despite system redundancy, the implementation of security measures and the existence of a Disaster Recovery Plan for our internal information technology systems, our systems are vulnerable to damages from any number of sources, including computer viruses, unauthorized access, energy blackouts, natural disasters, terrorism, war and telecommunication failures. Any system failure or accident that causes interruptions in our operations could result in a material disruption to our business. We may also incur additional costs to remedy damages caused by such disruptions.

Compliance with changing regulation applicable to corporate governance and public disclosure may result in additional expenses, affect our operations and affect our reputation.

        Changing laws, regulations and standards relating to corporate governance and public disclosure, including the Sarbanes-Oxley Act of 2002 and other SEC regulations and New York Stock Exchange rules, are creating uncertainty for public companies. These new or changed laws, regulations and standards are subject to varying interpretations in many cases due to their lack of specificity, and as a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies, which could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices. We are committed to maintaining high standards of corporate governance and public disclosure. As a result, our efforts to comply with evolving laws, regulations and standards have resulted in, and are likely to continue to result in, increased general and administrative expenses and a diversion of management time and attention from revenue-generating activities to compliance activities. In particular, our efforts to comply with Section 404 of the Sarbanes-Oxley Act of 2002 and the related regulations regarding our required assessment of our internal controls over financial reporting has required the commitment of significant financial and managerial resources. In addition, it has become more difficult and more expensive for us to obtain director and officer liability insurance. We expect these efforts to require the continued commitment of significant resources. Further, our directors, president and treasurer could face an increased risk of personal liability in connection with the performance of their duties. As a result, we may have difficulty attracting and retaining qualified directors and executive officers, which could harm our business. If our efforts to comply with new or changed laws, regulations and standards differ from the activities intended by regulatory or governing bodies due to ambiguities related to practice, our reputation may be harmed.

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Forward-Looking Statements May Prove Inaccurate

        See Item 7 "Management's Discussion and Analysis of Financial Condition and Results of Operations—Forward-looking Information" for additional disclosure regarding forward-looking statements.

ITEM 1B.    UNRESOLVED STAFF COMMENTS

        As of December 31, 2009, we did not have any unresolved comments with the staff of the SEC.

ITEM 2.    PROPERTIES

The Portfolio

General

        As of December 31, 2009, we owned or held interests in four consolidated commercial office properties encompassing approximately 3.8 million rentable square feet, located primarily in midtown Manhattan. Certain of these properties include at least a small amount of retail space on the lower floors, as well as basement/storage space. As of December 31, 2009, our portfolio also included ownership interests in 16 consolidated and one unconsolidated commercial office properties located in Queens, Westchester County and Connecticut, or the Suburban assets, encompassing approximately 2.6 million rentable square feet and approximately 1.4 million rentable square feet, respectively.

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        The following table sets forth certain information with respect to each of the Manhattan and Suburban office and retail properties in the portfolio as of December 31, 2009:

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Lease Expirations

        Leases in our Manhattan portfolio, as at many other Manhattan office properties, typically have a term of seven to fifteen years, compared to typical lease terms of five to ten years in other large U.S. office markets. For the five years ending December 31, 2014, the average annual rollover at our Manhattan consolidated properties is approximately 0.2 million square feet representing an average annual expiration rate of 6.2% per year (assuming no tenants exercise renewal or cancellation options and there are no tenant bankruptcies or other tenant defaults).

        The following tables set forth a schedule of the annual lease expirations at our Manhattan consolidated properties, with respect to leases in place as of December 31, 2009 for each of the next ten years and thereafter (assuming that no tenants exercise renewal or cancellation options and that there are no tenant bankruptcies or other tenant defaults):

        Leases in our Suburban portfolio, as at many other suburban office properties, typically have a term of five to ten years. For the five years ending December 31, 2014, the average annual rollover at our Suburban consolidated and unconsolidated properties is approximately 0.3 million square feet and none, respectively, representing an average annual expiration rate of 14.2% and none respectively, per year (assuming no tenants exercise renewal or cancellation options and there are no tenant bankruptcies or other tenant defaults).

        Our Suburban unconsolidated property is leased to a single tenant on a net-lease basis. The lease expires in 2020.

        The following tables set forth a schedule of the annual lease expirations at our Suburban consolidated properties with respect to leases in place as of December 31, 2009 for each of the next ten years and thereafter

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(assuming that no tenants exercise renewal or cancellation options and that there are no tenant bankruptcies or other tenant defaults):

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Tenant Diversification

        At December 31, 2009, our portfolio was leased to approximately 247 tenants, which are engaged in a variety of businesses, including professional services, financial services, media, apparel, business services and government/non-profit. The following table sets forth information regarding the leases with respect to the 10 largest tenants in our portfolio, based on the amount of square footage leased by our tenants as of December 31, 2009:

Environmental Matters

        We engaged independent environmental consulting firms to perform Phase I environmental site assessments on our portfolio, in order to assess existing environmental conditions. All of the Phase I assessments met the ASTM Standard. Under the ASTM Standard, a Phase I environmental site assessment consists of a site visit, an historical record review, a review of regulatory agency data bases and records, and interviews with on-site personnel, with the purpose of identifying potential environmental concerns associated with real estate. These environmental site assessments did not reveal any known environmental liability that we believe will have a material adverse effect on our results of operations or financial condition.

ITEM 3.    LEGAL PROCEEDINGS

        As of December 31, 2009, we were not involved in any material litigation nor, to management's knowledge, is any material litigation threatened against us or our portfolio other than routine litigation arising in the ordinary course of business or litigation that is adequately covered by insurance.

ITEM 4.    SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

        No matters were submitted to a vote of our stockholders during the fourth quarter ended December 31, 2009.

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PART II

ITEM 5.    MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

        There is no established trading market for our common equity. As of February 16, 2010, there were two holders of our Class A common units, both of which are subsidiaries of SL Green.

COMMON UNITS

        No distributions have been declared by ROP subsequent to the Merger on January 25, 2007.

UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

        We did not sell any Class A common units during the year ended December 31, 2009 that were not registered under the Securities Act of 1933, as amended.

        In 2009 and 2008, none and 9,383 respectively, Class A common units were exchanged into shares of SL Green's common stock and cash in accordance with the Merger Agreement.

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ITEM 6.    SELECTED FINANCIAL DATA

        The following table sets forth our selected financial data and should be read in conjunction with our Financial Statements and notes thereto included in Item 8, "Financial Statements and Supplementary Data" and Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations" in this Annual Report on Form 10-K.

        The financial position as of December 31, 2006 and 2005 (Predecessor) and the results of operations for the period from January 1, 2007 to January 25, 2007 (Predecessor) and years ended December 31, 2006 and 2005 (Predecessor), have been recorded based on the historical values of the assets and liabilities of ROP prior to the Merger. The financial position as of December 31, 2009, 2008, and 2007 (Successor) and the results of operations for the years ended December 31, 2009 and 2008, and the period from January 26, 2007 to December 31, 2007 (Successor) have been recorded based on the fair values assigned to the assets and liabilities of ROP in connection with the Merger. As such, the information presented may not be comparable.

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(1)

The weighted average occupancy represents the total leased square feet divided by total available rentable square feet.