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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2015

OR

For the transition period from                      to                     

Commission file number 001-33097

GLADSTONE COMMERCIAL CORPORATION

(Exact name of registrant as specified in its charter)

(703) 287-5800

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

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  ¨    NO  x

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  ¨    NO  x

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  x    NO  ¨

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 during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    YES  x    NO  ¨

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 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.  ¨

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 the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12 b-2 of the Act).    YES  ¨    NO  x.

The aggregate market value of the voting common stock held by non-affiliates of the Registrant on June 30, 2015, based on the closing price on that date of $16.56 on the NASDAQ Global Select Market, was $341,529,764. For the purposes of calculating this amount only, all directors and executive officers of the Registrant have been treated as affiliates. There were 22,550,111 shares of the Registrant’s common stock, $0.001 par value per share, outstanding as of February 17, 2016.

Documents Incorporated by Reference: Portions of the Registrant’s Proxy Statement, to be filed no later than April 30, 2016, relating to the Registrant’s 2016 Annual Meeting of Stockholders, are incorporated by reference into Part III of this Annual Report on Form 10-K.

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GLADSTONE COMMERCIAL CORPORATION

FORM 10-K FOR THE YEAR ENDED

DECEMBER 31, 2015

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Forward-Looking Statements

Our disclosure and analysis in this Annual Report on Form 10-K, or Form 10-K, and the documents that are incorporated by reference herein, contain “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, or Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, or Exchange Act. We intend such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in the Private Securities Ligation Reform Act of 1995 and include this statement for purposes of complying with these safe harbor provisions. Forward-looking statements relate to expectations, beliefs, projections, future plans and strategies, anticipated events or trends concerning matters that are not historical facts. These forward-looking statements include information about possible or assumed future events, including, among other things, discussion and analysis of our future financial condition, results of operations and funds from operations, or FFO, our strategic plans and objectives, cost management, occupancy and leasing rates and trends, liquidity and ability to refinance our indebtedness as it matures, anticipated capital expenditures (and access to capital) required to complete projects, amounts of anticipated cash distributions to our stockholders in the future and other matters. Words such as “anticipates,” “expects,” “intends,” “plans,” “will,” “should,” “believes,” “seeks,” “estimates,” “may” and variations of these words and similar expressions are intended to identify forward-looking statements, though not all forward-looking statements contain these words. These statements are not guarantees of future performance and are subject to risks, uncertainties and other factors, some of which are beyond our control, are difficult to predict and could cause actual results to differ materially from those expressed or forecasted in the forward-looking statements. Statements regarding the following subjects, among others, are forward-looking by their nature:

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Forward-looking statements involve inherent uncertainty and may ultimately prove to be incorrect or false. You are cautioned not to place undue reliance on forward-looking statements. Except as otherwise may be required by law, we undertake no obligation to update or revise forward-looking statements to reflect changed assumptions, the occurrence of unanticipated events or actual operating results. Our actual results could differ materially from those anticipated in these forward-looking statements as a result of various factors, including, but not limited to:

This list of risks and uncertainties, however, is only a summary of some of the most important factors to us and is not intended to be exhaustive. You should carefully review the risks set forth herein under the caption “Item 1A. Risk Factors.” New factors may also emerge from time to time that could have a material adverse effect on our business.

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Item 1. Business.

Overview

Gladstone Commercial Corporation (which we refer to as “we,” “us,” or the “Company”) is a REIT that was incorporated under the General Corporation Laws of the State of Maryland on February 14, 2003. We focus on acquiring, owning, and managing primarily office and industrial properties. On a selective basis, we may make long term industrial and commercial mortgage loans; however we do not have any mortgage loans currently outstanding. Our properties are geographically diversified and our tenants cover a broad cross section of business sectors and range in size from small to very large private and public companies. We actively communicate with buyout funds, real estate brokers and other third parties to locate properties for potential acquisition or to provide mortgage financing in an effort to build our portfolio. We target secondary growth markets that possess favorable economic growth trends, diversified industries, and growing population and employment.

We have historically entered into, and intend in the future to enter into, purchase agreements for real estate having net leases with terms of approximately 7 to 15 years and built in rental rate increases. Under a net lease, the tenant is required to pay all operating, maintenance, repair and insurance costs and real estate taxes with respect to the leased property.

As of February 17, 2016:

We conduct substantially all of our activities, including the ownership of all of our properties, through Gladstone Commercial Limited Partnership, a Delaware limited partnership, which we refer to as our Operating Partnership. We control our Operating Partnership through our ownership of GCLP Business Trust II, a Massachusetts business trust, which is the general partner of our Operating Partnership, and of GCLP Business Trust I, a Massachusetts business trust, which currently holds all of the limited partnership units of our Operating Partnership. Our Operating Partnership may issue limited partnership units from time to time in exchange for industrial and commercial real property; however, no units have been issued since inception. Limited partners who hold limited partnership units in our Operating Partnership will generally be entitled to redeem these units for cash or, at our election, shares of our common stock on a one-for-one basis.

Our Operating Partnership is the sole member of Gladstone Commercial Lending, LLC, which we refer to as Gladstone Commercial Lending. Gladstone Commercial Lending is a Delaware limited liability company that was formed to hold any real estate mortgage loans.

Our business is managed by our external adviser, Gladstone Management Corporation, or our Adviser. Gladstone Administration, LLC, or our Administrator, provides administrative services to us. Both our Advisor and our Administrator are affiliates of ours and each other.

Our Investment Objectives and Our Strategy

Our principal investment objectives are to generate income from rental properties and, to a much lesser extent, mortgage loans, which we use to fund our continuing operations and to pay monthly cash

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distributions to our stockholders. Our strategy is to invest in and own a diversified portfolio of leased properties (primarily office and industrial) that we believe will produce stable cash flow and increase in value. We may sell some of our real estate assets when our Adviser determines that doing so would be advantageous to us and our stockholders. We also expect to occasionally make mortgage loans secured by income-producing commercial, industrial or retail real estate, which loans may have some form of equity participation. We do not have any mortgage loans currently outstanding.

In addition to cash on hand and cash from operations, we use funds from various other sources to finance our acquisitions and operations, including equity, our line of credit, mortgage financing and other sources that may become available from time to time. We believe that moderate leverage is prudent and we aspire to become an investment grade borrower over time. We intend to use non-recourse mortgage financing that will allow us to limit our loss exposure on any property to the amount of equity invested in such property. The market for long-term mortgages continues to be strong and the environment is very competitive. The collateralized mortgage backed securities, or CMBS, market remains active but its underwriting terms have become slightly more conservative and restrictive than they were in the first half of 2015. For instance, interest only amortization periods have become more difficult to secure. Lenders’ tighter credit metrics have had very little impact on our access to credit because we have been leveraging assets at loan to values of 60% or less rather than seeking to maximize leverage. The sell-off in junk bonds has caused CMBS spreads to widen significantly and the CMBS market remains volatile. Consequently, we continue to look to regional banks, insurance companies and other non-bank lenders, in addition to the CMBS market, to issue mortgages to finance our real estate activities.

In addition to leverage, we were active in the equity markets during 2015 by issuing shares of common stock under our at-the-market program, or ATM Program, pursuant to our open market sale agreement with Cantor Fitzgerald & Co., or Cantor Fitzgerald.

Investment Policies

Types of Investments

Overview

We intend to earn substantially all of our revenues from the ownership of income-producing real property or, to a much lesser extent, mortgage loans secured by real property. We expect that a majority of our investments will continue to be structured as net leases, but if a net lease would have an adverse impact on a potential tenant, or we assume a lease with a different existing structure in place, we may structure our investment as either a gross or modified gross lease, or as a mortgage loan. Investments are not restricted to geographical areas, but we expect that most of our investments in real estate will continue to be made within the continental United States. Some of our investments may also be made through joint ventures that would permit us to own interests in large properties without restricting the diversity of our portfolio.

We anticipate that we will make substantially all of our investments through our Operating Partnership. Our Operating Partnership may acquire interests in real property or mortgage loans in exchange for the issuance of limited partnership units, for cash or through a combination of both. Units issued by our Operating Partnership generally will be redeemable for cash or, at our election, shares of our common stock on a one-for-one basis. However, we may in the future also conduct some of our business and hold some of our interests in real properties or mortgage loans through one or more wholly-owned subsidiaries that are not owned, directly or indirectly, through our Operating Partnership. We have not issued any limited partnership units to date.

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Property Acquisitions and Net Leasing

To date, we have purchased a majority of our properties from owners that have leased their properties to non-affiliated tenants, and while we have engaged in some transactions with tenants who have consummated sale-leaseback transactions, these transactions do not comprise the dominant portion of our portfolio. We expect that some of our sale-leaseback transactions will be in conjunction with acquisitions, recapitalizations or other corporate transactions affecting our tenants. In these transactions, we may act as one of several sources of financing by purchasing one or more properties from the tenant and by leasing it on a net basis to the tenant or its successor in interest. For a discussion of the risks associated with leasing property to leveraged tenants, see “Risk Factors—Highly leveraged tenants and borrowers may be unable to pay rent or make mortgage payments, which could adversely affect our cash available to make distributions to our stockholders.”

Our portfolio consists primarily of single-tenant commercial and industrial real property; while we will continue to acquire select multi-tenant commercial and industrial properties, as well as retail and medical properties our primary focus is single-tenant industrial and office properties. Generally, we lease properties to tenants that our Adviser deems creditworthy under leases that will be full recourse obligations of our tenants or their affiliates. In most cases, our leases will be “net leases” that require the tenant to pay all the operating costs, costs of maintenance and repair, insurance and real estate taxes on the property. We seek to obtain lease terms of approximately 7 to 15 years with built-in rental increases.

We have formed relationships with nationally recognized strategic partners to assist us with the management of our properties in each of our markets. These relationships provide local expertise to ensure that our properties are properly maintained and that our tenants have local points of contact to address property issues. This strategy improves our operating efficiencies, increases local market intelligence for the Adviser, and generally does not increase our costs as the local property managers are reimbursed by the tenants in accordance with the lease agreements.

Investments in Mortgage Loans

Although we expect to make investments in mortgage loans sparingly, we may elect to structure our investment in a particular property as a mortgage loan secured by the property. We anticipate that most of our lending transactions would be loans secured by industrial or commercial property or issued in connection with a build-to-suit transaction. Our Adviser will attempt to structure mortgage loans in a manner that would provide us with current income substantially similar to that which we could expect to receive had the investment been structured as a net lease transaction.

To the extent that we invest in mortgage loans, we will generally originate those loans. However, we may also purchase mortgage loans from banks, CMBS pools or other lenders provided that such transactions are otherwise consistent with our investment objectives. Our Adviser will service the mortgage loans in our portfolio by monitoring the collection of monthly principal and interest payments on our behalf. We do not have any mortgage loans currently outstanding.

Underwriting Criteria, Due Diligence Process and Negotiating Lease Provisions

We consider underwriting of the real estate and the tenant for the property (or the borrower in the case of a mortgage loan) to be the two most important aspects of evaluating a prospective investment. In analyzing potential acquisitions of properties and leases, our Adviser reviews all aspects of the potential transaction, including tenant and real estate fundamentals, to determine whether potential acquisitions and leases can be structured to satisfy our acquisition criteria. The criteria listed below provide general guideposts that our Adviser may consider when underwriting leases and mortgage loans:

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Underwriting of the Real Estate and Due Diligence Process

In addition to underwriting the tenant or borrower, our Adviser also underwrites the real estate to be acquired or secured by one of our mortgages. On our behalf, our Adviser performs a due diligence review with respect to each property, such as evaluating the physical condition of a property, zoning and site requirements to ensure the property is in compliance with all zoning regulations as well as an environmental site assessment, in an attempt to determine potential environmental liabilities associated with a property prior to its acquisition, although there can be no assurance that hazardous substances or wastes (as defined by present or future federal or state laws or regulations) will not be discovered on the property after we acquire it. We could incur significant costs related to government regulation and private litigation over environmental matters. See “Risk Factors – We could be exposed to liability and remedial costs related to environmental matters.”

Our Adviser also reviews the structural soundness of the improvements on the property and may engage a structural engineer to review multiple aspects of the structures to determine the longevity of each building on the property. This review normally also includes the components of each building, such as the roof, the structure and configuration, the electrical wiring, the heating and air-conditioning system, the plumbing, parking lot and various other aspects such as compliance with state and federal building codes.

Our Adviser also physically inspects the real estate and surrounding real estate as part of determining its value. All of our Adviser’s due diligence is aimed at arriving at a valuation of the real estate under the assumption that it would not be rented to the existing tenant. As part of this process, our Adviser may consider one or more of the following items:

In addition, our Adviser supplements its valuation with an independent real estate appraisal in connection with each investment that we consider. When appropriate, our Adviser may engage experts to undertake some or all of the due diligence efforts described above.

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Use of Leverage

In addition to cash on hand and cash from operations, we use funds from various other sources to finance our acquisitions and operations, including equity, our line of credit, mortgage financing and other sources that may become available from time to time. We believe that moderate leverage is prudent and we aspire to achieve an investment grade rating over time.

Currently, the majority of our mortgage borrowings are structured as non-recourse to us, with limited exceptions that would trigger recourse to us only upon the occurrence of certain fraud, misconduct, environmental or bankruptcy events. The use of non-recourse financing allows us to limit our exposure to the amount of equity invested in the properties pledged as collateral for our borrowings. Non-recourse financing generally restricts a lender’s claim on the assets of the borrower, and as a result, the lender generally may look only to the property securing the debt for its satisfaction. We believe that this financing strategy, to the extent available, protects our other assets. However, we can provide no assurance that non-recourse financing will be available on terms acceptable to us, or at all, and consequently, there may be circumstances where lenders have recourse to our other assets. To a much lesser extent, we use recourse financing. Of the $460.8 million in long-term mortgages outstanding as of December 31, 2015, only $2.9 million is recourse to the Company.

In August 2013, we procured a senior unsecured revolving credit facility, or the Line of Credit, with KeyBank National Association (serving as a revolving lender, a letter of credit issuer and an administrative agent). In October 2015, we expanded our Line of Credit to $85.0 million and extended the maturity date 1-year through August 2018, with a 1-year extension option through August 2019. We also added a $25.0 million 5-year term loan facility, which matures in October 2020. The interest rate on the revolving line of credit was also reduced by 25 basis points at each of the leverage tiers and the total maximum commitment under the two facilities was increased from $100.0 million to $150.0 million. We also added 3 new lenders to the bank syndicate, which is now comprised of KeyBank, Comerica Banks, Fifth Third Bank, US Bank and Huntington Bank.

Conflict of Interest Policy

We have adopted policies to reduce potential conflicts of interest. In addition, our directors are subject to certain provisions of Maryland law that are designed to minimize conflicts. However, we cannot assure you that these policies or provisions of law will reduce or eliminate the influence of these conflicts.

Under our current conflict of interest policy, without the approval of a majority of our independent directors, we will not:

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Our policy also prohibits us from purchasing any real property owned by or co-investing with our Adviser, any of its affiliates or any business in which our Adviser or any of its subsidiaries have invested, except that we may lease property to existing and prospective portfolio companies of current or future affiliates, such as Gladstone Capital Corporation, Gladstone Land Corporation or Gladstone Investment Corporation and other entities advised by our Adviser, so long as that entity does not control the portfolio company and the transaction is approved by both companies’ board of directors. If we decide to change this policy on co-investments with our Adviser or its affiliates, we will seek our stockholders’ approval.

Future Revisions in Policies and Strategies

Our independent directors periodically review our investment policies to evaluate whether they are in the best interests of us and our stockholders. Our investment procedures, objectives and policies may vary as new investment techniques are developed or as regulatory requirements change, and except as otherwise provided in our charter or bylaws, may be altered by a majority of our directors (including a majority of our independent directors) without the approval of our stockholders, to the extent that our Board of Directors determines that such modification is in the best interest of our stockholders. Among other factors, developments in the market which affect the policies and strategies described in this report or which change our assessment of the market may cause our Board of Directors to revise our investment policies and strategies.

Code of Ethics

We have adopted a code of ethics and business conduct applicable to all personnel of our Adviser that complies with the guidelines set forth in Item 406 of Regulation S-K of the Securities Act of 1933, as amended. This code establishes procedures for personal investments, restricts certain transactions by such personnel and requires the reporting of certain transactions and holdings by such personnel. A copy of this code is available for review, free of charge, at our website at www.GladstoneCommercial.com. We intend to provide any required disclosure of any amendments to or waivers of the provisions of this code by posting information regarding any such amendment or waiver to our website within four days of its effectiveness.

Our Adviser and Administrator

Our business is managed by our Adviser. The officers, directors and employees of our Adviser have significant experience in making investments in and lending to businesses of all sizes, and investing in real estate and making mortgage loans. We have entered into an investment advisory agreement with our Adviser, or the Advisory Agreement, under which our Adviser is responsible for managing our assets and liabilities, for operating our business on a day-to-day basis and for identifying, evaluating, negotiating and consummating investment transactions consistent with our investment policies as determined by our Board of Directors from time to time. Gladstone Administration, LLC, or our Administrator, employs our chief financial officer, treasurer, chief compliance officer, general counsel and secretary (who also serves as our Administrator’s president) and their respective staffs and provides administrative services for us under the Administration Agreement.

David Gladstone, our chairman and chief executive officer, is also the chairman, chief executive officer and the controlling stockholder of our Adviser and our Administrator. Terry Lee Brubaker, our vice chairman and chief operating officer and a member of our Board of Directors, also serves in the same capacities for our Adviser and our Administrator. Robert Cutlip, our president, is also an executive managing director of our Adviser.

Our Adviser maintains our investment committee that approves each of our investments. This investment committee is currently comprised of Messrs. Gladstone, Cutlip and Brubaker. We believe that the review process of our investment committee gives us a unique competitive advantage over other REITs because of the substantial experience that its members possess and their unique perspective in evaluating the blend of corporate credit, real estate and lease terms that collectively provide an acceptable risk for our investments.

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Our Adviser’s board of directors has empowered our investment committee to authorize and approve our investments, subject to the terms of the Advisory Agreement. Before we acquire any property, the transaction is reviewed by our investment committee to ensure that, in its view, the proposed transaction satisfies our investment criteria and is within our investment policies. Approval by our investment committee is generally the final step in the property acquisition approval process, although the separate approval of our Board of Directors is required in certain circumstances described below. For further detail on this process, please see “Investment Policies—Underwriting Criteria, Due Diligence Process and Negotiating Lease Provisions.”

Our Adviser and Administrator are headquartered in McLean, Virginia, a suburb of Washington, D.C., and our Adviser also has offices in several other states.

Advisory and Administration Agreements

Many of the services performed by our Adviser and Administrator in managing our day-to-day activities are summarized below. This summary is provided to illustrate the material functions which our Adviser and Administrator perform for us pursuant to the terms of the Advisory and Administration Agreements, respectively.

Advisory Agreement

Under the terms of the Advisory Agreement, we are responsible for all expenses incurred for our direct benefit. Examples of these expenses include legal, accounting, interest, directors’ and officers’ insurance, stock transfer services, stockholder-related fees, consulting and related fees. In addition, we are also responsible for all fees charged by third parties that are directly related to our business, which include real estate brokerage fees, mortgage placement fees, lease-up fees and transaction structuring fees (although we may be able to pass some or all of such fees on to our tenants and borrowers).

On July 24, 2015, we entered into an amended and restated advisory agreement, or the Amended Advisory Agreement, with the Adviser, effective July 1, 2015. Our entrance into the amended agreement was approved unanimously by our Board of Directors, including separate and unanimous approval by the independent directors on our Board of Directors.

The calculation of the annual base management fee was revised to equal 1.5% of our total stockholders’ equity, (before giving effect to the base management and incentive fee), adjusted to exclude the effect of any unrealized gains or losses that do not affect realized net income (including impairment charges) and adjusted for any one-time events and certain non-cash items (only after approval of our Compensation Committee), or adjusted total stockholders’ equity. Our Adviser does not charge acquisition or disposition fees when we acquire or dispose of properties as is common in other externally managed REITs; however, our Adviser may earn fee income from our borrowers, tenants or other sources.

Under the Amended Advisory Agreement, the calculation of the incentive fee was revised to reward the Adviser in circumstances where our quarterly Core FFO (defined at the end of this paragraph), before giving effect to any incentive fee, or pre-incentive fee Core FFO, exceeds 2.0% quarterly, or 8.0% annualized, of adjusted total stockholders’ equity (after giving effect to the base management fee but before giving effect to the incentive fee). We refer to this as the new hurdle rate. The Adviser will receive 15.0% of the amount of our pre-incentive fee Core FFO that exceeds the new hurdle rate. However, in no event shall the incentive fee for a particular quarter exceed by 15.0% (the cap) the average quarterly incentive fee paid by us for the previous four quarters (excluding quarters for which no incentive fee was paid). Core FFO is defined as GAAP net income (loss) available to common stockholders, excluding the incentive fee, depreciation and amortization, any realized and unrealized gains, losses or other non-cash items recorded in net income (loss) available to common stockholders for the period, and one-time events pursuant to changes in GAAP.

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The incentive fee under the prior Advisory Agreement rewarded the Adviser in circumstances where our quarterly FFO, before giving effect to any incentive fee, or pre-incentive fee FFO, exceeded 1.75%, or 7.0% annualized, or the hurdle rate, of common stockholders’ equity. Funds from operations, or FFO, included any realized capital gains and capital losses, less any distributions paid on preferred stock and Senior Common Stock, but FFO did not include any unrealized capital gains or losses (including impairment charges). The Adviser received 100.0% of the amount of the pre-incentive fee FFO that exceeded the hurdle rate, but was less than 2.1875% of our common stockholders’ equity. The Adviser also received an incentive fee of 20.0% of the amount of our pre-incentive fee FFO that exceeded 2.1875% of common stockholders’ equity.

Administration Agreement

Under the terms of the Administration Agreement, we pay separately for our allocable portion of our Administrator’s overhead expenses in performing its obligations to us including, but not limited to, rent and our allocable portion of the salaries and benefits expenses of our Administrator’s employees, including, but not limited to, our chief financial officer, treasurer, chief compliance officer, general counsel and secretary (who also serves as our Administrator’s president), and their respective staffs. Prior to July 1, 2014, our allocable portion was generally derived by multiplying that portion of the Administrator’s expenses allocable to all funds managed by the Adviser by the percentage of our total assets at the beginning of each quarter in comparison to the total assets of all funds managed by the Adviser. As approved by our Board of Directors, effective July 1, 2014, our allocable portion of the Administrator’s expenses are generally derived by multiplying our Administrator’s total expenses by the approximate percentage of time the Administrator’s employees perform services for us in relation to their time spent performing services for all companies serviced by our Administrator under contractual agreements. We believe that the new methodology of allocating the Administrator’s total expenses by approximate percentage of time services were performed among all companies serviced by our Administrator more closely approximates fees paid to actual services performed.

Adviser Duties and Authority under the Advisory Agreement

Under the terms of the Advisory Agreement, our Adviser is required to use its best efforts to present to us investment opportunities consistent with our investment policies and objectives as adopted by our Board of Directors. In performing its duties, our Adviser, either directly or indirectly by engaging an affiliate:

Our Board of Directors has authorized our Adviser to make investments in any property on our behalf without the prior approval of our Board of Directors if the following conditions are satisfied:

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The actual terms and conditions of transactions involving investments in properties and mortgage loans are determined at the sole discretion of our Adviser, subject at all times to compliance with the foregoing requirements. Some types of transactions, however, require the prior approval of our Board of Directors, including a majority of our independent directors, including the following:

Our Adviser and Administrator also engage in other business ventures and, as a result, their resources are not dedicated exclusively to our business. For example, our Adviser and Administrator also serve as the external adviser or administrator, respectively, to Gladstone Capital Corporation and Gladstone Investment Corporation, both publicly traded business development companies affiliated with us, and Gladstone Land Corporation, a publicly traded agricultural real estate investment trust that is also our affiliate. However, under the Amended Advisory Agreement, our Adviser is required to devote sufficient resources to the administration of our affairs to discharge its obligations under the agreement. The Amended Advisory Agreement is not assignable or transferable by either us or our Adviser without the consent of the other party, except that our Adviser may assign the Amended Advisory Agreement to an affiliate for whom our Adviser agrees to guarantee its obligations to us.

Gladstone Securities

Gladstone Securities, LLC, or Gladstone Securities, is a privately held broker dealer registered with the Financial Industry Regulatory Authority and insured by the Securities Investor Protection Corporation. Gladstone Securities is an affiliate of ours, as its parent company is controlled by Mr. David Gladstone, our chairman and chief executive officer. Mr. Gladstone also serves on the board of managers of Gladstone Securities.

Dealer Manager Agreement

In connection with the offering of our convertible senior common stock, or Senior Common Stock, we entered into a Dealer Manager Agreement, dated March 25, 2011, or the Dealer Manager Agreement, with Gladstone Securities, or the Dealer Manager, pursuant to which the Dealer Manager agreed to act as our exclusive dealer manager in connection with the offering. The Dealer Manager Agreement terminated according to its terms on March 28, 2015. Pursuant to the terms of the Dealer Manager Agreement, the Dealer Manager was entitled to receive a sales commission in the amount of 7.0% of the gross proceeds of the shares of Senior Common Stock sold, plus a dealer manager fee in the amount of 3.0% of the gross proceeds of the shares of Senior Common Stock sold. In addition, we agreed to indemnify the Dealer Manager against various liabilities, including certain liabilities arising under the federal securities laws.

Mortgage Financing Arrangement Agreement

We also entered into an agreement with Gladstone Securities, effective June 18, 2013, for it to act as our non-exclusive agent to assist us with arranging mortgage financing for properties we own. In connection with this engagement, Gladstone Securities may from time to time solicit the interest of various commercial real estate lenders or recommend to us third party lenders offering credit products or packages that are responsive to our needs. We pay Gladstone Securities a financing fee in connection with the services it

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provides to us for securing mortgage financing on any of our properties. The amount of these financing fees, which are payable upon closing of the financing, will be based on a percentage of the amount of the mortgage, generally ranging from 0.15% to a maximum of 1.0% of the mortgage obtained. The amount of the financing fees may be reduced or eliminated, as determined by us and Gladstone Securities, after taking into consideration various factors, including, but not limited to, the involvement of any third party brokers and market conditions. The agreement is scheduled to terminate on August 31, 2016, unless renewed and approved by our Board of Directors or earlier terminated.

Employees

We do not currently have any employees and do not expect to have any employees in the foreseeable future. Currently, services necessary for our business are provided by individuals who are employees of our Adviser and our Administrator pursuant to the terms of the Amended Advisory Agreement and the Administration Agreement, respectively. Each of our executive officers is an employee or officer, or both, of our Adviser or our Administrator. We expect that a total of 15 to 20 full time employees of our Adviser and our Administrator will spend substantial time on our matters during calendar year 2016. To the extent that we acquire more investments, we anticipate that the number of employees of our Adviser and our Administrator who devote time to our matters will increase.

As of December 31, 2015, our Adviser and Administrator collectively had 66 full-time employees. A breakdown of these employees is summarized by functional area in the table below:

Competition

We compete with a number of other real estate companies and traditional mortgage lenders, many of whom have greater marketing and financial resources than we do. Principal factors of competition in our primary business of investing in and owning leased industrial, commercial and retail real property are the quality of properties, leasing terms, attractiveness and convenience of location. Additionally, our ability to compete depends upon, among other factors, trends of the national and local economies, investment alternatives, financial condition and operating results of current and prospective tenants and borrowers, availability and cost of capital, taxes and governmental regulations.

Available Information

Copies of our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, proxy statements and amendments, if any, to those reports filed or furnished with the Securities and Exchange Commission, or SEC, pursuant to Section 13(a) or 15(d) of the Securities Exchange Act are available free of charge through our website at www.GladstoneCommercial.com. A request for any of these reports may also be submitted to us by sending a written request addressed to Investor Relations, Gladstone Commercial Corporation, 1521 Westbranch Drive, Suite 100, McLean, VA 22102, or by calling our toll-free investor relations line at 1-866-366-5745. The public may read and copy materials that we file with the SEC at the SEC’s Public Reference Room at 100 F Street, NE, Washington, DC 20549. Information on the operation of the Public Reference Room may be obtained by calling the SEC at 1-800-SEC-0330. The SEC also maintains a website that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC at www.sec.gov.

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Item 1A. Risk Factors.

An investment in our securities involves a number of significant risks and other factors relating to our structure and investment objectives. As a result, we cannot assure you that we will achieve our investment objectives. You should consider carefully the following information before making an investment in our securities.

Risks related to our business and properties

Certain of our tenants and borrowers may be unable to pay rent or make mortgage payments, which could adversely affect our cash available to make distributions to our stockholders.

Some of our tenants and borrowers may have recently been either restructured using leverage, or acquired in a leveraged transaction. Tenants and borrowers that are subject to significant debt obligations may be unable to make their rent or mortgage payments if there are adverse changes to their businesses or because of the impact of the recent recession. Tenants that have experienced leveraged restructurings or acquisitions will generally have substantially greater debt and substantially lower net worth than they had prior to the leveraged transaction. In addition, the payment of rent and debt service may reduce the working capital available to leveraged entities and prevent them from devoting the resources necessary to remain competitive in their industries.

In situations where management of the tenant or borrower will change after a transaction, it may be difficult for our Adviser to determine with reasonable certainty the likelihood of the tenant’s or borrower’s business success and of its ability to pay rent or make mortgage payments throughout the lease or loan term. These companies generally are more vulnerable to adverse economic and business conditions, and increases in interest rates.

We are subject to the credit risk of our tenants, which in the event of bankruptcy, could adversely affect our results of operations.

We are subject to the credit risk of our tenants. Any bankruptcy of a tenant or borrower could cause:

Under bankruptcy law, a tenant who is the subject of bankruptcy proceedings has the option of continuing or terminating any unexpired lease. If a bankrupt tenant terminates a lease with us, any claim we might have for breach of the lease (excluding a claim against collateral securing the lease) will be treated as a general unsecured claim. Our claim would likely be capped at the amount the tenant owed us for unpaid rent prior to the bankruptcy unrelated to the termination, plus the greater of one year’s lease payments or 15% of the remaining lease payments payable under the lease (but no more than three years’ lease payments). In addition, due to the long-term nature of our leases and terms providing for the repurchase of a property by the tenant, a bankruptcy court could re-characterize a net lease transaction as a secured lending transaction. If that were to occur, we would not be treated as the owner of the property, but might have additional rights as a secured creditor.

In addition, we may enter into sale-leaseback transactions, whereby we would purchase a property and then lease the same property back to the person from whom we purchased it. In the event of the bankruptcy of a tenant, a transaction structured as a sale-leaseback may be re-characterized as either a financing or a joint venture, either of which outcomes could adversely affect our business. If the sale-leaseback were re-characterized as a financing, we might not be considered the owner of the property, and as a result would have the status of a creditor in relation to the tenant. In that event, we would no longer have the right to sell

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or encumber our ownership interest in the property. Instead, we would have a claim against the tenant for the amounts owed under the lease, with the claim arguably secured by the property. The tenant/debtor might have the ability to propose a plan restructuring the term, interest rate and amortization schedule of its outstanding balance. If confirmed by the bankruptcy court, we could be bound by the new terms, and prevented from foreclosing our lien on the property. If the sale-leaseback were re-characterized as a joint venture, we could be treated as a co-venturer with our lessee with regard to the property. As a result, we could be held liable, under some circumstances, for debts incurred by the lessee relating to the property. Either of these outcomes could adversely affect our cash flow and our ability to pay distributions to stockholders.

We may be unable to renew leases, lease vacant space or re-lease space as leases expire, which could adversely affect our business and our ability to make distributions to our stockholders.

If we cannot renew leases, we may be unable to re-lease our properties to other tenants at rates equal to or above the current market rate. Even if we can renew leases, tenants may be able to negotiate lower rates as a result of market conditions. Market conditions may also hinder our ability to lease vacant space in newly developed or redeveloped properties. In addition, we may enter into or acquire leases for properties that are suited to the needs of a particular tenant. Such properties may require renovations, tenant improvements or other concessions in order to lease them to other tenants if the initial leases terminate. We may be required to expend substantial funds for tenant improvements and tenant refurbishments to re-lease the vacated space and cannot assure you that we will have sufficient sources of funding available to use in the future for such purposes and therefore may have difficulty in securing a replacement tenant. Any of these factors could adversely impact our financial condition, results of operations, cash flow or our ability to pay distributions to our stockholders.

Net leases may not result in fair market lease rates over time, thereby failing to maximize income and distributions to our stockholders.

A large portion of our rental income comes from net leases, which frequently provide the tenant greater discretion in using the leased property than ordinary property leases, such as the right to sublease the property, subject to our approval, to make alterations in the leased premises and to terminate the lease prior to its expiration under specified circumstances. Further, net leases are typically for longer lease terms and, thus, there is an increased risk that contractual rental increases in future years will fail to result in fair market rental rates during those years. As a result, our income and distributions to our stockholders could be lower than they would otherwise be if we did not engage in net leases.

Multi-tenant properties expose us to additional risks.

Our multi-tenant properties could expose us to the risk that a sufficient number of suitable tenants may not be found to enable the property to operate profitably. This loss of income could cause a material adverse impact to our results of operations and business. Multi-tenant properties are also subject to tenant turnover and fluctuation in occupancy rates, which could affect our operating results. Furthermore, multi-tenant properties expose us to the risk of increased operating expenses, which may occur when the actual cost of taxes, insurance and maintenance at the property exceeds the operating expenses paid by tenants and/or the amounts budgeted.

We face certain risks associated with our build-to-suit activities.

We may (1) provide a developer with either a combination of financing for construction of a build-to-suit property or a commitment to acquire a property upon completion of construction of a build-to-suit property and commencement of rent from the tenant or (2) acquire a property subject to a lease and engage a developer to complete construction of a build-to-suit property as required by the lease. We face uncertainties associated with a developer’s timely performance and timely completion of a project, including the performance or timely completion of contractors and subcontractors. If a developer, contractor or subcontractor fails to perform, we may resort to legal action to compel performance, remove the developer or rescind the purchase or construction contract.

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We may incur additional risks as we make periodic payments or other advances to developers before completion of construction. These and other factors can result in increased costs of a project or loss of our investment, and may be affected by conditions beyond both our and the developer’s control.

Illiquidity of real estate investments may make it difficult for us to sell properties in response to market conditions and could harm our financial condition and ability to make distributions to our stockholders.

To the extent the properties are not subject to triple-net leases, some significant expenditures, such as real estate taxes and maintenance costs, are generally not reduced when circumstances cause a reduction in income from the investment. Should these events occur, our income and funds available for distribution could be adversely affected. In addition, as a REIT, we may be subject to a 100% tax on net income derived from the sale of property considered to be held primarily for sale to customers in the ordinary course of our business. We may seek to avoid this tax by complying with certain safe harbor rules that generally limit the number of properties we may sell in a given year, the aggregate expenditures made on such properties prior to their disposition, and how long we retain such properties before disposing of them. However, we can provide no assurance that we will always be able to comply with these safe harbors. If compliance is possible, the safe harbor rules may restrict our ability to sell assets in the future and achieve liquidity that may be necessary to fund distributions.

Our real estate investments may include special use and single or multi-tenant properties that may be difficult to sell or re-lease upon tenant defaults or early lease terminations.

We focus our investments on office and industrial properties, a number of which include manufacturing facilities, special use storage or warehouse facilities and special use single or multi-tenant properties. These types of properties are relatively illiquid compared to other types of real estate and financial assets. This illiquidity will limit our ability to quickly change our portfolio in response to changes in economic or other conditions. With these properties, if the current lease is terminated or not renewed or, in the case of a mortgage loan, if we take such property in foreclosure, we may be required to renovate the property or to make rent concessions in order to lease the property to another tenant or sell the property. In addition, in the event we are forced to sell the property, we may have difficulty selling it to a party other than the tenant or borrower due to the special purpose for which the property may have been designed.

These and other limitations may affect our ability to sell or re-lease properties without adversely affecting returns to our stockholders.

Many of our tenants are small and medium sized businesses, which exposes us to additional risks unique to these entities.

Leasing real property or making mortgage loans to small and medium-sized businesses exposes us to a number of unique risks related to these entities, including the following:

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Our real estate investments have a limited number of tenants and are concentrated in a limited number of industries, which subjects us to an increased risk of significant loss if any one of these tenants is unable to pay or if particular industries experience downturns.

As of December 31, 2015, we owned 99 properties and had 97 tenants in these properties, and our 5 largest tenants accounted for approximately 19.1% of our total rental income. A consequence of a limited number of tenants is that the aggregate returns we realize may be materially adversely affected by the unfavorable performance of a small number of tenants. We do not have fixed guidelines for industry concentration and our investments could potentially be concentrated in relatively few industries. As of December 31, 2015, 15.8% of our total rental income was earned from tenants in the telecommunications industry, 15.4% was earned from tenants in the healthcare industry, and 13.0% was earned from tenants in the automobile industry. As a result, a downturn in an industry in which we have invested a significant portion of our total assets could have a material adverse effect on us.

The inability of a tenant in a single tenant property to pay rent will reduce our revenues and increase our carrying costs of the building.

Since most of our properties are occupied by a single tenant, the success of each investment will be materially dependent on the financial stability of these tenants. If a tenant defaults, our rental revenues would be reduced and our expenses associated with carrying the property would increase, as we would be responsible for payments such as taxes and insurance. Lease payment defaults by these tenants could adversely affect our cash flows and cause us to reduce the amount of distributions to stockholders. In the event of a default by a tenant, we may experience delays in enforcing our rights as landlord and may incur substantial costs in protecting our investment and re-leasing our property. If a lease is terminated, there is no assurance that we will be able to lease the property for the rent previously received or sell the property without incurring a loss.

Liability for uninsured losses could adversely affect our financial condition.

Losses from disaster-type occurrences (such as wars, floods or earthquakes) may be either uninsurable or not insurable on economically viable terms. Should such a loss occur, we could lose our capital investment or anticipated profits and cash flow from one or more properties.

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We could incur significant costs related to government regulation and private litigation over environmental matters.

Under various environmental laws, including the Comprehensive Environmental Response, Compensation and Liability Act, or CERCLA, a current or previous owner or operator of real property may be liable for contamination resulting from the release or threatened release of hazardous or toxic substances or petroleum at that property, and an entity that arranges for the disposal or treatment of a hazardous or toxic substance or petroleum at another property may be held jointly and severally liable for the cost to investigate and clean up such property or other affected property. Such parties are known as potentially responsible parties, or PRPs. Environmental laws often impose liability without regard to whether the owner or operator knew of, or was responsible for, the presence of the contaminants, and the costs of any required investigation or cleanup of these substances can be substantial. PRPs are liable to the government as well as to other PRPs who may have claims for contribution. The liability is generally not limited under such laws and could exceed the property’s value and the aggregate assets of the liable party. The presence of contamination or the failure to remediate contamination at our properties also may expose us to third-party liability for personal injury or property damage, or adversely affect our ability to sell, lease or develop the real property or to borrow using the real property as collateral.

Environmental laws also impose ongoing compliance requirements on owners and operators of real property. Environmental laws potentially affecting us address a wide variety of matters, including, but not limited to, asbestos-containing building materials, storage tanks, storm water and wastewater discharges, lead-based paint, wetlands and hazardous wastes. Failure to comply with these laws could result in fines and penalties and/or expose us to third-party liability. Some of our properties may have conditions that are subject to these requirements, and we could be liable for such fines or penalties and/or liable to third parties for those conditions.

We could be exposed to liability and remedial costs related to environmental matters.

Certain of our properties may contain, or may have contained, asbestos-containing building materials, or ACBMs. Environmental laws require that ACBMs be properly managed and maintained and may impose fines and penalties on building owners and operators for failure to comply with these requirements. Also, certain of our properties may contain, or may have contained, or are adjacent to or near other properties that have contained or currently contain storage tanks for the storage of petroleum products or other hazardous or toxic substances. These operations create a potential for the release of petroleum products or other hazardous or toxic substances. Certain of our properties may contain, or may have contained, elevated radon levels. Third parties may be permitted by law to seek recovery from owners or operators for property damage and/or personal injury associated with exposure to contaminants, including, but not limited to, petroleum products, hazardous or toxic substances and asbestos fibers. Also, certain of our properties may contain regulated wetlands that can delay or impede development or require costs to be incurred to mitigate the impact of any disturbance. Absent appropriate permits, we can be held responsible for restoring wetlands and be required to pay fines and penalties.

Certain of our properties may contain, or may have contained, microbial matter such as mold and mildew. The presence of microbial matter could adversely affect our results of operations. In addition, if any of our property is not properly connected to a water or sewer system, or if the integrity of such systems are breached, or if water intrusion into our buildings otherwise occurs, microbial matter or other contamination can develop. When excessive moisture accumulates in buildings or on building materials, mold growth may occur, particularly if the moisture problem remains undiscovered or is not addressed over a period of time. Some molds may produce airborne toxins or irritants. If this were to occur, we could incur significant remedial costs and we may also be subject to material private damage claims and awards. Concern about indoor exposure to mold has been increasing, as exposure to mold may cause a variety of adverse health effects and symptoms, including allergic or other reactions. If we become subject to claims in this regard, it could materially and adversely affect us and our future insurability for such matters.

The assessments we perform on our acquisition of property may fail to reveal all environmental conditions, liabilities or compliance concerns. Material environmental conditions, liabilities or compliance concerns may have arisen after the assessments were conducted or may arise in the future, and future laws, ordinances or regulations may impose material additional environmental liability. We cannot assure you that costs of future environmental compliance will not affect our ability to make distributions or that such costs or other remedial measures will not be material to us.

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Our properties may be subject to impairment charges, which could adversely affect our results of operations.

We are required to periodically evaluate our properties for impairment indicators. A property’s value is considered impaired if management’s estimate of the aggregate future cash flows (undiscounted and without interest charges) to be generated by the property, based upon its intended use, is less than the carrying value of the property. These estimates of cash flows are based upon factors such as expected future operating income, trends and prospects, as well as the effects of interest and capitalization rates, demand and occupancy, competition and other factors. These factors may result in uncertainty in valuation estimates and instability in the estimated value of our properties which, in turn, could result in a substantial decrease in the value of the properties and significant impairment charges.

We continually assess our properties to determine if any impairments are necessary or appropriate. No assurance can be given that we will be able to recover the current carrying amount of our properties in the future. Our failure to do so would require us to recognize additional impairment charges for the period in which we reached that conclusion, which could materially and adversely affect us and our results of operations.

Mortgage loans may be affected by unfavorable real estate market conditions, including interest rate fluctuations, which could decrease the value of those loans and our results of operations.

Investments in mortgage loans, exposes us to the risk of default by the borrowers on those mortgage loans as well as interest rate risks. To the extent we incur delays in liquidating such defaulted mortgage loans, we may not be able to obtain sufficient proceeds to repay all amounts due to us under the mortgage loans. Further, we will not know whether the values of the properties securing the mortgage loans will remain at the levels existing on the dates of origination of those mortgage loans. If the values of the underlying properties fall, our risk will increase because of the lower value of the security associated with such loans. We do not have any mortgage loans currently outstanding.

Risks related to our financing

Capital markets and economic conditions can materially affect our financial condition and results of operations, the value of our equity securities, and our ability to sustain payment of our distribution at current levels.

Many factors affect the value of our equity securities and our ability to make or maintain the current levels of distributions to the holders of our shares of beneficial interest, including the state of the capital markets and the economy, which in recent years have negatively affected substantially all businesses, including ours. Demand for office, industrial, and retail space nationwide has slowly improved, it is approaching pre-recession levels. The availability of credit has been and may in the future again be adversely affected by illiquid credit markets. Regulatory pressures and the burden of troubled and uncollectible loans led some lenders and institutional investors to reduce, and in some cases, cease to provide funding to borrowers. If these market conditions recur, they may limit our ability and the ability of our tenants to timely refinance maturing liabilities and access the capital markets to meet liquidity needs, which may materially affect our financial condition and results of operations and the value of our equity securities and our ability to sustain payment of our distribution at current levels.

Our Line of Credit contains various covenants which, if not complied with, could accelerate our repayment obligations, thereby materially and adversely affecting our liquidity, financial condition, results of operations and ability to pay distributions to stockholders.

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The agreement governing our Line of Credit requires us to comply with certain financial and operational covenants. These covenants require us to, among other things, maintain certain financial ratios, including fixed charge coverage, debt service coverage and a minimum net worth. In addition our Line of Credit requires us to have liquid assets of $38.5 million beginning August 31, 2016 if our 7.125% Series C Cumulative Term Preferred Stock is still outstanding and has not been extended and we have failed to meet certain conditions relating to a pending extension or redemption to the lender’s satisfaction. We are also required to limit our distributions to stockholders to 100% of our FFO. As of December 31, 2015, we were in compliance with these covenants. However, our continued compliance with these covenants depends on many factors, and could be impacted by current or future economic conditions, and thus there are no assurances that we will continue to comply with these covenants. Failure to comply with these covenants would result in a default which, if we were unable to obtain a waiver from the lenders, could accelerate our repayment obligations under the Line of Credit and thereby have a material adverse impact on our liquidity, financial condition, results of operations and ability to pay distributions to stockholders.

Our business strategy relies on external financing, as a result we may be negatively affected by restrictions on additional borrowings, and the risks associated with leverage, including our debt service obligations.

We use leverage so that we may make more investments than would otherwise be possible in order to maximize potential returns to stockholders. We have been slowly reducing our overall leverage over the past few years to lower this risk. If the income generated by our properties and other assets fails to cover our debt service, we could be forced to reduce or eliminate distributions to our stockholders and may experience losses.

Our ability to achieve our investment objectives will be affected by our ability to borrow money in sufficient amounts and on favorable terms. We expect that we will borrow money that will be secured by our properties and that these financing arrangements will contain customary covenants such as those that limit our ability, without the prior consent of the lender, to further mortgage the applicable property or to discontinue insurance coverage. Accordingly, we may be unable to obtain the degree of leverage we believe to be optimal, which may cause us to have less cash for distribution to stockholders than we would have with an optimal amount of leverage. Our use of leverage could also make us more vulnerable to a downturn in our business or the economy, as it may become difficult to meet our debt service obligations if our cash flows are reduced due to tenant defaults. There is also a risk that a significant increase in the ratio of our indebtedness to the measures of asset value used by financial analysts may have an adverse effect on the market price of our securities.

We face risks related to “balloon payments” and refinancing.

Some of our debt financing arrangements may require us to make lump-sum or “balloon” payments at maturity. Our ability to make a balloon payment at maturity is uncertain and may depend upon our ability to obtain additional financing or to sell the financed property. At the time the balloon payment is due, we may not be able to refinance the balloon payment on terms as favorable as the original loan or sell the property at a price sufficient to make the balloon payment, which could adversely affect the amount of distributions to our stockholders. We have balloon payments of $68.7 million payable during the remaining of 2016.

We mortgage our properties, which subjects us to the risk of foreclosure in the event of non-payment.

We intend to acquire additional properties by using our Line of Credit and by continuing to seek long-term financing, where we will borrow a portion of the purchase price of a potential acquisition and secure the loan with a mortgage on some or all of our existing real property. We look to regional banks, insurance companies and other non-bank lenders, and, to a lesser extent, the CMBS market to issue mortgages to finance our real estate activities. For the year ended December 31, 2015, we obtained approximately $68.5 million in long-term financing, which we used to acquire additional properties and refinance maturing debt. If we are unable to make our debt payments as required, a lender could foreclose on the property securing its loan. This could cause us to lose part or all of our investment in such property which in turn could cause the value of our securities or the amount of distributions to our stockholders to be reduced.

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We face a risk from the fact that certain of our properties are cross-collateralized.

As of December 31, 2015, the mortgages on certain of our properties were cross-collateralized. To the extent that any of the properties in which we have an interest are cross-collateralized, any default by the property owner subsidiary under the mortgage note relating to the one property will result in a default under the financing arrangements relating to any other property that also provides security for that mortgage note or is cross-collateralized with such mortgage note.

A change in the value of our assets could cause us to experience a cash shortfall or be in default of our loan covenants.

We borrow on an unsecured basis under the Line of Credit; however, we are required to maintain a pool of unsecured assets sufficient to draw on the Line of Credit. A significant reduction in the value of our pool of unencumbered assets could require us to pay down the balance of the Line of Credit. Although we believe that we have significant excess collateral and capacity, future asset values are uncertain. If we were unable to meet a request to add collateral to the Line of Credit, this inability could have a material adverse effect on our liquidity and our ability to meet our loan covenants.

Interest rate fluctuations may adversely affect our results of operations.

We may experience interest rate volatility in connection with mortgage loans on our properties or other variable-rate debt that we may obtain from time to time. Certain of our leases contain escalations based on market interest rates and the interest rate on our Line of Credit and five of our long-term mortgages is variable. Although we seek to mitigate this risk by structuring such provisions to contain a minimum interest rate or escalation rate, as applicable, these features do not eliminate this risk. We are also exposed to the effects of interest rate changes as a result of holding cash and cash equivalents in short-term, interest-bearing investments. We have entered into interest rate caps to attempt to manage our exposure to interest rate fluctuations on our outstanding variable rate mortgages. A significant change in interest rates could have an adverse impact on our results of operations.

Risks related to the real estate industry

We are subject to certain risks associated with real estate ownership and lending which could reduce the value of our investments.

Our investments include industrial, office, commercial and retail property. Our performance, and the value of our investments, is subject to risks inherent to the ownership and operation of these types of properties, including:

The debt obligations of our tenants are dependent upon certain factors, which neither we nor our tenants or borrowers control, such as national, local and regional business and economic conditions, government economic policies, and the level of interest rates.

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Competition for the acquisition of real estate may impede our ability to make acquisitions or increase the cost of these acquisitions.

We compete with many other entities to acquire properties, including financial institutions, institutional pension funds, other REITs, foreign real estate investors, other public and private real estate companies and private real estate investors. These competitors may prevent us from acquiring desirable properties, cause an increase in the price we must pay for real estate, have greater resources than we do, and may be willing to pay more for certain assets or may have a more compatible operating philosophy with our acquisition targets. In particular, larger REITs may enjoy significant competitive advantages that result from, among other things, a lower cost of capital and enhanced operating efficiencies. Our competitors may also adopt transaction structures similar to ours, which would decrease our competitive advantage in offering flexible transaction terms. In addition, the number of entities and the amount of funds competing for suitable investment properties may increase, resulting in increased demand and increased prices paid for these properties.

Our ownership of properties through ground leases exposes us to risks which are different than those resulting from our ownership of fee title to other properties.

We have acquired an interest in four of our properties by acquiring a leasehold interest in the land underlying the property, and we may acquire additional properties in the future that are subject to similar ground leases. In this situation, we have no economic interest in the land underlying the property and do not control this land, thus this type of ownership interest poses potential risks for our business because (i) if the ground lease terminates for any reason, we will lose our interest in the property, including any investment that we made in the property, (ii) if our tenant defaults under the previously existing lease, we will continue to be obligated to meet the terms and conditions of the ground lease without the annual amount of ground lease payments reimbursable to us by the tenant, and (iii) if the third party owning the land under the ground lease disrupts our use either permanently or for a significant period of time, then the value of our assets could be impaired and our results of operations could be adversely affected.

Risks related to our Adviser

We are dependent upon our key personnel, who are employed by our Adviser, for our future success, particularly David Gladstone, Terry Lee Brubaker and Robert Cutlip.

We are dependent on our senior management and other key management members to carry out our business and investment strategies. Our future success depends to a significant extent on the continued service and coordination of our senior management team, particularly David Gladstone, our chairman and chief executive officer, Terry Lee Brubaker, our vice chairman and chief operating officer, and Robert Cutlip, our president. The departure of any of our executive officers or key personnel could have a material adverse effect on our ability to implement our business strategy and to achieve our investment objectives.

Our success depends on the performance of our Adviser and if our Adviser makes inadvisable investment or management decisions, our operations could be materially adversely impacted.

Our ability to achieve our investment objectives and to pay distributions to our stockholders is dependent upon the performance of our Adviser in evaluating potential investments, selecting and negotiating property purchases and dispositions and mortgage loans, selecting tenants and borrowers, setting lease or mortgage loan terms and determining financing arrangements. Accomplishing these objectives on a cost-effective basis is largely a function of our Adviser’s marketing capabilities, management of the investment process, ability to provide competent, attentive and efficient services and our access to financing sources on acceptable terms. Our stockholders have no opportunity to evaluate the terms of transactions or other economic or financial data concerning our investments and must rely entirely on the analytical and management abilities of our Adviser and the oversight of our Board of Directors. If our Adviser or our Board of Directors makes inadvisable investment or management decisions, our operations could be materially adversely impacted. As we grow, our Adviser may be required to hire, train, supervise and manage new employees. Our Adviser’s failure to effectively manage our future growth could have a material adverse effect on our business, financial condition and results of operations.

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We may have conflicts of interest with our Adviser and other affiliates.

Our Adviser manages our business and locates, evaluates, recommends and negotiates the acquisition of our real estate investments. At the same time, our Advisory Agreement permits our Adviser to conduct other commercial activities and provide management and advisory services to other entities, including, but not limited to, Gladstone Capital Corporation, or Gladstone Capital, Gladstone Investment Corporation, or Gladstone Investment, and Gladstone Land Corporation, or Gladstone Land. Moreover, with the exception of our chief financial officer, and president, all of our executive officers and directors are also executive officers and directors of Gladstone Capital and Gladstone Investment, which actively make loans to and invest in small and medium-sized companies. and Gladstone Land, an agricultural real estate investment trust. Further, our chief executive officer and chairman is on the board of managers of Gladstone Securities, LLC, or Gladstone Securities, an affiliated broker dealer that provides us with mortgage financing services pursuant to a contractual agreement. Mr. Gladstone is also the 100% indirect owner and controller of Gladstone Securities. As a result, we may from time to time have conflicts of interest with our Adviser in its management of our business, Gladstone Securities, in its provision of services to us and our other affiliated funds, and with Gladstone Capital, Gladstone Investment and Gladstone Land, which may arise primarily from the involvement of our Adviser, Gladstone Securities, Gladstone Capital, Gladstone Investment, Gladstone Land and their affiliates in other activities that may conflict with our business.

Examples of these potential conflicts include:

These and other conflicts of interest between us and our Adviser and other affiliates could have a material adverse effect on the operation of our business and the selection or management of our real estate investments.

Terminating the Amended Advisory Agreement without cause requires payment of a substantial termination fee.

Termination of the Amended Advisory Agreement with our Adviser without cause would be difficult and costly. We may only terminate the agreement without cause (as defined therein) upon 120 days’ prior written notice and after the affirmative vote of at least two-thirds of our independent directors. Furthermore, if we default under the agreement and any applicable cure period has expired, the Adviser may terminate the agreement. In each of the foregoing cases, we will be required to pay the Adviser a termination fee equal to two times the sum of the average base management fee and incentive fee earned by our Adviser during the 24-month period prior to such termination. This provision increases the cost to us of terminating the Amended Advisory Agreement and adversely affects our ability to terminate our Adviser without cause. Additionally, depending on the amount of the fee, if incurred, it could adversely affect our ability to pay distributions to our common, preferred and senior common stockholders.

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Our Adviser is not obligated to provide a waiver of the incentive fee, which could negatively impact our earnings and our ability to maintain our current level of, or increase, distributions to our stockholders.

The Advisory Agreement contemplates a quarterly incentive fee based on our FFO. Our Adviser has the ability to issue a full or partial waiver of the incentive fee for current and future periods; however, our Adviser is not required to issue any waiver. Any waiver issued by our Adviser is a voluntary, unconditional and irrevocable waiver. For the years ended December 31, 2015, 2014 and 2013, an unconditional and irrevocable voluntary waiver was issued by our Adviser for approximately $2.5 million, $3.0 million, and $3.5 million, respectively. If our Adviser does not issue this waiver in future quarters, it could negatively impact our earnings and may compromise our ability to maintain our current level of, or increase, distributions to our stockholders, which could have a material adverse impact on the market price of our securities.

Risks Related to Qualification and Operation as a REIT

If we fail to qualify as a REIT, our operations and distributions to stockholders would be adversely impacted.

We intend to continue to be organized and to operate to qualify as a REIT under the Internal Revenue Code of 1986, as amended, or the Code. A REIT generally is not taxed at the corporate level on income it currently distributes to its stockholders. Qualification as a REIT involves the application of highly technical and complex rules for which there are only limited judicial or administrative interpretations. The determination of various factual matters and circumstances not entirely within our control may affect our ability to continue to qualify as a REIT. In addition, new legislation, new regulations, administrative interpretations or court decisions could significantly change the tax laws, possibly with retroactive effect, with respect to qualification as a REIT or the federal income tax consequences of such qualification.

If we were to fail to qualify as a REIT in any taxable year:

We may need to incur additional borrowings to meet the REIT minimum distribution requirement and to avoid excise tax.

In order to maintain our qualification as a REIT, we are required to distribute to our stockholders at least 90% of our annual real estate investment trust taxable income (excluding any net capital gain and before application of the distributions paid deduction). To the extent that we satisfy this distribution requirement, but distribute less than 100% of our taxable income, we will be subject to federal corporate income tax on our undistributed taxable income. In addition, we are subject to a 4% nondeductible excise tax on the amount, if any, by which certain distributions paid by us with respect to any calendar year are less than the sum of (i) 85% of our ordinary income for that year, (ii) 95% of our net capital gain for that year and (iii) 100% of our undistributed taxable income from prior years. In order to meet the 90% distribution requirement and to avoid the 4% excise tax, we may need to incur additional borrowings. Although we intend to pay distributions to our stockholders in a manner that allows us to meet the 90% distribution requirement and avoid this 4% excise tax, we cannot assure you that we will always be able to do so.

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Complying with the REIT requirements may cause us to forgo otherwise attractive opportunities or liquidate otherwise attractive investments.

To qualify as a REIT for federal income tax purposes, we must continually satisfy tests concerning, among other things, the nature of our assets, the sources of our gross income, the amounts we distribute to our stockholders and the ownership of our capital stock. In order to meet these tests, we may be required to forgo investments we might otherwise make. Thus, compliance with the REIT requirements may hinder our performance.

In particular, we must ensure that at the end of each calendar quarter, at least 75% of the value of our assets consists of cash, cash items, government securities and qualified real estate assets. The remainder of our investment in securities (other than government securities, securities of taxable REIT subsidiaries (each, a taxable REIT subsidiary, or TRS) and qualified real estate assets) generally cannot include more than 10% of the outstanding voting securities of any one issuer. In addition, in general, no more than 5% of the value of our assets (other than government securities, securities of TRSs and qualified real estate assets) can consist of the securities of any one issuer, and no more than 25% (20% beginning with our taxable year ending December 31, 2018) of the value of our total assets can be represented by the securities of one or more TRSs.

We also must ensure that (i) at least 75% of our gross income for each taxable year consists of certain types of income that we derive, directly or indirectly, from investments relating to real property or mortgages on real property or qualified temporary investment income and (ii) at least 95% of our gross income for each taxable year consists of income that is qualifying income for purposes of the 75% gross income test, other types of interest and distributions, gain from the sale or disposition of stock or securities, or any combination of these.

In addition, we may be required to make distributions to our stockholders at disadvantageous times or when we do not have funds readily available for distribution. If we fail to comply with these requirements at the end of any calendar quarter, we must qualify for certain statutory relief provisions to avoid losing our REIT qualification and suffering adverse tax consequences. As a result, we may be required to liquidate otherwise attractive investments, and may be unable to pursue investments that would otherwise be advantageous to us in order to satisfy the asset and gross income requirements for qualifying as a REIT. These actions could have the effect of reducing our income and the amounts available for distribution to our stockholders. Thus, compliance with the REIT requirements may hinder our ability to make, and, in certain cases, maintain ownership of certain attractive investments.

The Protecting Americans from Tax Hikes Act (PATH Act) was enacted in December 2015, and included numerous law changes applicable to REITs. The provisions have various effective dates beginning as early as 2016. We expect that the changes will not materially impact our operations, but will continue to monitor as regulatory guidance is issued.

To the extent that our distributions represent a return of capital for tax purposes, you could recognize an increased capital gain upon a subsequent sale of your stock.

Distributions in excess of our current and accumulated earnings and profits and not treated by us as a dividend will not be taxable to a U.S. stockholder to the extent such distributions do not exceed the stockholder’s adjusted tax basis in its shares of our stock but instead will constitute a return of capital and will reduce the stockholder’s adjusted tax basis in its share of our stock. If our distributions result in a reduction of a stockholder’s adjusted basis in its shares of our stock, subsequent sales by such stockholder of its shares of our stock potentially will result in recognition of an increased capital gain or reduced capital loss due to the reduction in such stockholder’s adjusted basis in its shares of our stock.

We may be subject to adverse legislative or regulatory tax changes that could reduce the market price of our securities.

At any time, the federal income tax laws governing REITs or the administrative interpretations of those laws may be amended. We cannot predict when or if any new federal income tax law, regulation, or administrative interpretation, or any amendment to any existing federal income tax law, regulation or administrative interpretation, will be adopted, promulgated or become effective and any such law, regulation, or interpretation may take effect retroactively. We and our stockholders could be adversely affected by any such change in, or any new, federal income tax law, regulation or administrative interpretation.

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Complying with the REIT requirements may limit our ability to hedge effectively and may cause us to incur tax liabilities.

The REIT provisions of the Code substantially limit our ability to hedge our liabilities. Any income from a hedging transaction that we enter into to manage risk of interest rate changes, price changes or currency fluctuations with respect to borrowings made or to be made to acquire or carry real estate assets does not constitute “gross income” for purposes of the gross income requirements. To the extent that we enter into other types of hedging transactions, the income from those transactions is likely to be treated as non-qualifying income for purposes of both of the gross income tests. As a result of these rules, we may need to limit our use of advantageous hedging techniques or implement those hedges through TRSs. This could increase the cost of our hedging activities because any TRS would be subject to tax on gains or expose us to greater risks associated with changes in interest rates than we would otherwise want to bear. In addition, losses incurred by a TRS generally will not provide any tax benefit, except for being carried forward against future taxable income earned by the TRS.

If our Operating Partnership fails to maintain its status as a disregarded entity or partnership for federal income tax purposes, its income may be subject to taxation.

As we hold all of the ownership interests in our Operating Partnership, it is currently disregarded for income tax purposes. We intend that our Operating Partnership will qualify as a partnership for income tax purposes upon the admission of additional partners; however, if the IRS were to successfully challenge the status of our Operating Partnership as a partnership, it would be taxable as a corporation. In such event, this would reduce the amount of distributions that our Operating Partnership could make to us. This could also result in our losing REIT status and becoming subject to corporate level tax on our income. This would substantially reduce our cash available to pay distributions and the return on your investment. In addition, if any of the entities through which our Operating Partnership owns its properties, in whole or in part, loses its characterization as a disregarded entity or a partnership for federal income tax purposes, it would be subject to taxation as a corporation, thereby reducing distributions to our Operating Partnership. Such a re-characterization of an underlying property owner could also threaten our ability to maintain REIT status.

Other risks

We are subject to restrictions that may discourage a change of control. Certain provisions contained in our articles of incorporation and Maryland law may prohibit or restrict a change of control.

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These prohibitions last for five years after the most recent date on which the interested stockholder became an interested stockholder. Thereafter, any business combination with the interested stockholder must be recommended by our Board of Directors and approved by the affirmative vote of at least 80% of the votes entitled to be cast by holders of our outstanding shares of common stock and two-thirds of the votes entitled to be cast by holders of our common stock other than shares held by the interested stockholder. These requirements could have the effect of inhibiting a change in control even if a change in control were in our stockholders’ interest. These provisions of Maryland law do not apply, however, to business combinations that are approved or exempted by our Board of Directors prior to the time that someone becomes an interested stockholder.

Market conditions could adversely affect the market price and trading volume of our securities.

The market price of our common and preferred stock may be highly volatile and subject to wide fluctuations, and the trading volume in our common and preferred stock may fluctuate and cause significant price variations to occur. We cannot assure investors that the market price of our common and preferred stock will not fluctuate or decline further in the future. Some market conditions that could negatively affect our share price or result in fluctuations in the price or trading volume of our securities include, but are not limited to:

Shares of common stock eligible for future sale may have adverse effects on our share price.

We cannot predict the effect, if any, of future sales of common stock, or the availability of shares for future sales, on the market price of our common stock. Sales of substantial amounts of common stock (including shares of common stock issuable upon the conversion of units of our operating partnership that we may issue from time to time or issuable upon conversion of our Senior Common Stock), or the perception that these sales could occur, may adversely affect prevailing market prices for our common stock.

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Compliance or failure to comply with laws requiring access to our properties by disabled persons could result in substantial cost.

The Americans with Disabilities Act, or ADA, and other federal, state and local laws generally require public accommodations be made accessible to disabled persons. Noncompliance could result in the imposition of fines by the government or the award of damages to private litigants. These laws may require us to modify our existing properties. These laws may also restrict renovations by requiring improved access to such buildings by disabled persons or may require us to add other structural features which increase our construction costs. Legislation or regulations adopted in the future may impose further burdens or restrictions on us with respect to improved access by disabled persons. We may incur unanticipated expenses that may be material to our financial condition or results of operations to comply with ADA and other federal, state and local laws, or in connection with lawsuits brought by private litigants.

Our Board of Directors may change our investment policy without stockholders’ approval.

Subject to our co-investment policy, our Board of Directors will determine our investment and financing policies, growth strategy and our debt, capitalization, distribution, acquisition, disposition and operating policies. Our Board of Directors may revise or amend these strategies and policies at any time without a vote by stockholders. Accordingly, stockholders’ control over changes in our strategies and policies is limited to the election of directors, and changes made by our Board of Directors may not serve the interests of stockholders and could adversely affect our financial condition or results of operations, including our ability to distribute cash to stockholders or qualify as a REIT.

Our failure to redeem our Series C Term Preferred Stock on its mandatory redemption date could trigger a change of control in our Board of Directors and would be an event of default under our Line of Credit.

If we fail to redeem or call for redemption the Series C Term Preferred Stock pursuant to the mandatory redemption required on January 31, 2017, the number of directors constituting our Board of Directors will be increased by the minimum number of directors, that when added to our Board of Directors, will constitute a majority, and the holders of our Series C Term Preferred Stock will be entitled, voting as a separate class (to the exclusion of the holders of all other classes or series of our stock), to elect such number of additional directors. Therefore, a change of control in our Board of Directors could occur, which could jeopardize the stability of our Company. Further, if we fail to meet certain requirements regarding a pending extension or redemption of the Series C Term Preferred Stock to the lender’s satisfaction or to have liquid assets equal to the redemption amount of our Series C Term Preferred Stock beginning August 31, 2016, the Required Lenders, as defined in our Line of Credit, may declare all amounts owing under such Line of Credit to be immediately due and payable.

Our rights and the rights of our stockholders to take action against our directors and officers are limited.

Maryland law provides that a director or officer has no liability in that capacity if he or she performs his or her duties in good faith, in a manner he or she reasonably believes to be advisable and in our best interests and with the care that an ordinarily prudent person in a like position would use under similar circumstances. In addition, our charter (i) eliminates our directors’ and officers’ liability to us and our stockholders for money damages except for liability resulting from actual receipt of an improper benefit in money, property or services or active and deliberate dishonesty established by a final judgment and that is material to the cause of action and (ii) requires us to indemnify directors and officers for liability resulting from actions taken by them in those capacities to the maximum extent permitted by Maryland law. As a result, our stockholders and we may have more limited rights against our directors and officers than might otherwise exist under common law. In addition, we may be obligated to fund the defense costs incurred by our directors and officers.

Our ability to pay distributions is limited by the requirements of Maryland law.

Our ability to pay distributions on our stock is limited by the laws of Maryland. Under applicable Maryland law, a Maryland corporation generally may not make a distribution if, after giving effect to the distribution, the corporation would not be able to pay its debts as the debts become due in the usual course of business or the corporation’s total assets would be less than the sum of its total liabilities plus, unless the

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corporation’s charter permits otherwise, the amount that would be needed, if the corporation were dissolved at the time of the distribution, to satisfy the preferential rights upon dissolution of stockholders whose preferential rights are superior to those receiving the distribution. Accordingly, we generally may not make a distribution on our stock if, after giving effect to the distribution, we would not be able to pay our debts as they become due in the usual course of business or our total assets would be less than the sum of our total liabilities plus, unless the terms of such class or series provide otherwise, the amount that would be needed to satisfy the preferential rights upon dissolution of the holders of shares of any class or series of stock then outstanding, if any, with preferences upon dissolution senior to those of such class of stock with respect to which the distribution would be made.

Cybersecurity risks and cyber incidents may adversely affect our business by causing a disruption to our operations, or the operations of businesses in which we invest, a compromise or corruption of our confidential information and/or damage to our business relationships, all of which could negatively impact our business, financial condition and operating results.

In the normal course of business we and our service providers collect and retain certain personal information provided by our tenants, employees of our Administrator and Adviser, and vendors. We also rely extensively on computer systems to process transactions and manage our business. A cyber incident is considered to be any adverse event that threatens the confidentiality, integrity or availability of our information resources. These incidents may be an intentional attack or an unintentional event and could involve gaining unauthorized access to our information systems for purposes of misappropriating assets, stealing confidential information, corrupting data or causing operational disruption. The result of these incidents may include disrupted operations, misstated or unreliable financial data, liability for stolen assets or information, increased cybersecurity protection and insurance costs, litigation and damage to our business relationships. As our reliance on technology has increased, so have the risks posed to our information systems, both internal and those provided to us by third-party service providers. We have implemented processes, procedures and internal controls to help mitigate cybersecurity risks and cyber intrusions, but these measures, as well as our increased awareness of the nature and extent of a risk of a cyber-incident, do not guarantee that a cyber-incident will not occur and/or that our financial results, operations or confidential information will not be negatively impacted by such an incident.

Item 1B. Unresolved Staff Comments.

None.

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Item 2. Properties.

The following table provides certain summary information about our 99 wholly-owned properties as of December 31, 2015 (dollars in thousands, except per square foot information).

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Item 2. Properties (Continued)

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Item 2. Properties (Continued)

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Item 2. Properties (Continued)