As of December 31, 2017,2019, we employed 9493 people.

Leasing real estate is highly competitive in the current market. As a result, we experience competition for high-quality tenants from owners and managers of competing projects. Therefore, we may experience delays in re-leasing vacant space;space, or we may have to provide rent concessions, incur charges for tenant improvements,improvement allowances, or offer other inducements to enable us to timely lease vacant space, all of which may have an adverse impact on our results of operations. In addition, we are in competition with other potential buyers for the acquisition of the same properties, which may result in an increase in the amount we must pay to purchase a property. Further, at the time we elect to dispose of our properties, we will also be in competition with sellers of similar properties to locate suitable purchasers.

We are dependent upon the ability of our current tenants to pay their contractual rent amounts as they become due. The inability of a tenant to pay future rental amounts would havecould result in a negativematerial adverse impact on our results of

Below are some of the risks and uncertainties that could cause our actual results to differ materially from those presented in our forward-looking statements. The risks and uncertainties described below are not the only ones we face but do represent those risks and uncertainties that we believe are material to our business, operating results, prospects, and financial condition. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also harm our business.

We are competing for real estate investments with other REITs; real estate limited partnerships; pension funds and their advisors; bank and insurance company investment accounts; individuals; non U.S. investors; and other entities. The market for high-quality commercial real estate assets is highly competitive, given how infrequently those assets become available for purchase. As a result, many real estate investors, including us, face aggressive competition to purchase quality office real estate assets. A significant number of entities and resources competing for high-quality office properties support relatively high acquisition prices for such properties, which may reduce the number of acquisition opportunities available to, or affordable for, us and could put pressure on our profitability and our ability to pay distributions to stockholders. We cannot be sure that we will be successful in obtaining suitable investments onwith financially attractive terms or that, if we make investments, our objectives will be achieved.

Although U.S. macroeconomic conditions continued to be relatively stable during 2017,2019, several economic factors, including potential increases in interest rates, may adversely affect the financial condition and liquidity of many businesses, as well as the general demand for office space generally.space. Further, our tenants might be adversely impacted by the specific consequences of, and the general market uncertainty associated with, geopolitical developments that could negatively affect international trade, including the United Kingdom's withdrawal from the European Union, the termination or threatened termination of existing international trade agreements, the outbreak or escalation of armed hostilities or acts of terrorism, or the implementation of tariffs or retaliatory tariffs on imported or exported goods. Should economic conditions worsen, our tenants' ability to honor their contractual obligations may suffer. Further, it may become increasingly difficult to maintain our occupancy rate and achieve future rental rates comparable to the rental rates of our currently in-place leases as we seek to re-lease space and/or renew existing leases.

These and other reasons may prevent us from being profitable or from realizing growth or maintaining the value of our real estate properties.

In addition, market and economic conditions in the metropolitan areas in which we derive a substantial portion of our revenue such as New York, City, New York; San Francisco, California; Washington, D.C.;, Boston, Massachusetts; and Atlanta, Georgia,Los Angeles, may have a significant impact on our overall occupancy levels and rental rates and, therefore, our profitability. Furthermore, our business strategy involves continued focus on select core markets, which will increase the impact of the local economic conditions in such markets on our results of operations in future periods. These and other reasons may prevent us from being profitable or from realizing growth or maintaining the value of our real estate properties.

The success of our investments materially depends on the financial stability of our tenants. A default or termination by a significant tenant on its lease payments to us would cause us to lose the revenue associated with such lease and require us to find an alternative source of revenue to meet mortgagedebt payments and prevent a foreclosure if the property is subject to a mortgage, could cause us to violate our bank debt covenants, or could impact our credit rating. In the event of a tenant default or bankruptcy, we may experience delays in enforcing our rights as landlord and may incur substantial costs in protecting our investment and re-letting our property. If a tenant defaults on or terminates a significant lease, we may be unable to lease the property for the rent previously received or sell the property without incurring a loss. In addition, significant expenditures for our properties and our company,Company, such as real estate taxes, insurance and maintenance costs, together with general and administrative costs and debt payments, do not decrease when revenues decrease. Therefore, these events could have a material adverse effect on our results of operations or cause us to reduce the amount of distributions to stockholders.

The physical effects of climate change could have a lackmaterial adverse effect on our properties, operations and business. For example, many of market knowledge or understanding ofour properties are located along the local economy, forging new business relationshipsEast and West coasts, particularly those in the area,central business districts of New York, San Francisco, Washington, D.C., Boston and unfamiliarity with local governmentLos Angeles. To the extent climate change causes changes in weather patterns, our markets could experience increases in storm intensity and permitting procedures. As arising sea-levels. Over time, these conditions could result the operating performance of properties acquired in new markets may be less than we anticipate, and we may have difficulty integrating such properties into our existing portfolio. In addition, the time and resources that may be required to obtain market knowledge and/or integrate such properties into our existing portfolio could divert our management's attention from our existing business or other attractive opportunitiesdeclining demand for office space in our established markets.

When tenants do not renew their leases or otherwise vacate their space, we often need to expend substantial funds for tenant improvements to improve the vacated space in order to attract replacement tenants. In addition, although we expect that our leases with tenants will require tenants to pay routine property maintenance costs, we will likely be responsible for any major structural repairs, such as repairs to the foundation, exterior walls, and rooftops.

If we need significant capital in the future to improve or maintain our properties or for any other reason, we will have to obtain financing from sources such as cash flow from operations, borrowings, property sales, or future equity offerings. These sources of funding may not be available on attractive terms or at all. If we cannot procure the necessary funding for capital improvements, our investments may generate lower cash flows or decline in value, or both, which would limit our ability to make distributions to our stockholders.

As of February 2, 2018,3, 2020, our total consolidated indebtedness was approximately $1.5$1.4 billion, which includes a $300.0 million term loan, a $150.0 million term loan, and $700.0 million of bonds and $71.9 million of mortgage loans, all with fixed interest rates, or with interest rates that are effectively fixed when considered in connection with an interest rate swap agreement;agreements; and $180.0 million outstanding on a bridge loan, a $300.0 million term loan, and $60.0$224.0 million in outstanding borrowings on our line of credit, all with a variable interest rates.rate. We are likely tomay incur additional indebtedness to acquire, develop, or redevelop properties, to fund property improvements and other capital expenditures, to pay our distributions, and for other purposes.

Significant borrowings by us increase the risks of an investment in us. If there is a shortfall between the cash flow from properties and the cash flow needed to service our indebtedness, then the amount available for distributions to stockholders may be reduced. In addition, incurring mortgage debt increases the risk of loss since defaults on indebtedness secured by a property may result in lenders initiating foreclosure actions. In that case, we could lose the property securing the loan that is in default. If any of our properties are foreclosed due to a default, our ability to pay cash distributions to our stockholders will be limited. For tax purposes, a foreclosure of any of our properties would be treated as a sale of the property for a purchase price equal to the outstanding balance of the debt secured by the mortgage. If the outstanding balance of the debt secured by the mortgage exceeds our tax basis in the property, we would recognize taxable income on foreclosure, but we would not receive any cash proceeds. We may give full or partial guarantees to lenders of mortgage debt on behalf of the entities that own our properties. When we give a guaranty on behalf of an entity that owns one of our properties, we are responsible to the lender for satisfaction of the debt if it is not paid by such entity.

If any mortgages or other indebtedness containcontains cross-collateralization or cross-default provisions, a default on a single loan could affect multiple properties. Our unsecured credit facility (the "Revolving Credit Facility") and our threetwo unsecured term loan facilities each include a cross-default provision that provides that a payment default under any recourse obligation of $50 million or more by us, Columbia Property Trust OP, or any of our subsidiaries, constitutes a default under the line of credit and term loan facilities.

When providing financing, a lender may impose restrictions on us that affect our distribution and operating policies and our ability to incur additional debt. Loan documents we enter into may contain covenants that limit our ability to further mortgage the property or discontinue insurance coverage. These or other limitations may limit our flexibility and our ability to execute on our operating plans.

Our senior unsecured debt is rated investment grade by Standard & Poor's CorporationS&P Global Ratings and Moody's Investors Service. In determining our credit ratings, the rating agencies consider a number of both quantitative and qualitative factors, including earnings, fixed charges, cash flows, total debt outstanding, total secured debt, off balance sheet obligations, total capitalization, and various ratios calculated from these factors. The rating agencies also consider predictability of cash flows, business strategy, joint venture activity, property development risks, industry conditions, and contingencies. Therefore, any deterioration in our operating performance could cause our investment-grade rating to come under pressure. Our corporate credit rating at Standard & Poor'sS&P Global Ratings Service is currently "BBB" with a stable outlook, and our corporate credit rating at Moody's Investor Service is currently "Baa2" with a stable outlook. There can be no assurance that our credit ratings will not be lowered or withdrawn in their entirety. A negative change in our ratings outlook or any downgrade in our current investment-grade credit ratings by rating agencies could adversely affect our cost and

A cyber incident is considered to be any adverse event that threatens the confidentiality, integrity, or availability of our information resources. More specifically, a cyber incident is an intentional attack or an unintentional event that can include gaining unauthorized access to systems to disrupt operations, corrupt data, or steal confidential information. A breach of our privacy or information security systems or our tenants' privacy or information security systems, particularly through cyber attacks or cyber intrusion, could materially adversely affect our business and financial condition.

We employ a number of measures to prevent, detect, and mitigate these threats, which include dual factor authentication, frequent password change events, firewall detection systems, frequent backups, a redundant data system for core applications, and annual breach testing. While, to date, we makehave not had a significant cyber breach or attack that has had a material impact on our business or results of operations, there can be no assurance that our efforts to maintain the security and integrity of these types of information technology networks and relatedour systems there can be no assurance that our security efforts and measures will be effective, or that attemptedwe will be able to maintain our systems free from security breaches or disruptions would notother operational interruptions.

A cybersecurity attack could compromise the confidential information of our employees, customers, and vendors. A successful attack could disrupt and affect our business operations, damage our reputation, and result in significant remediation and litigation costs. Further, one or more of our tenants could experience a cyber incident which could impact their operations and ability to perform under the terms of their lease with us. While we maintain insurance coverage that may, subject to policy terms and conditions including deductibles, cover specific aspects of cyber risks, such insurance coverage may be successful or damaging.insufficient to cover all losses. As cyber threats continue to evolve, we may be required to expend additional resources to continue to enhance our information security measures and to investigate and remediate any information security vulnerabilities.

We currently are, and are likely to continue to be, subject to a variety of claims arising in the ordinary course of business, includingbusiness. Such claims could include personal injury claims, contract claims, and claims alleging violations of federal and state law regarding workplace and employment matters, discrimination, and similar matters. Some of these claims may result in significant defense costs and potentially significant judgments against us, some of which are not, or cannot be, insured against. Although we defend ourselves against any such claims, we cannot be certain of the ultimate outcomes of currently asserted claims or of those that arise in the future. Resolution of these types of matters against us may result in our having to pay significant fines, judgments, or settlements, which, if uninsured, or if the fines, judgments, and settlements exceed insured levels, would adversely impact our earnings and cash flows, thereby impacting our ability to service debt and make distributions to our stockholders.

All real property and the operations conducted on real property are subject to federal, state, and local laws and regulations relating to environmental protection and human health and safety. Some of these laws and regulations may impose joint and several liability on tenants, owners, or operators for the costs to investigate or remediate contaminated properties, regardless of fault or whether the acts causing the contamination were legal. In addition, the presence of hazardous substances, or the failure to properly remediate these substances, may hinder our ability to sell, rent, or pledge such property as collateral for future borrowings.

Compliance with new laws or regulations such as the New York Climate Mobilization Act, or stricter interpretation of existing laws, may require us to incur material expenditures. Future laws, ordinances, or regulations may impose material environmental liability. Additionally, our tenants' operations, the existing condition of land when we buy it, operations in the vicinity of our properties, such as the presence of underground storage tanks or activities of unrelated third parties may affect our properties. Furthermore, there are various local, state, and federal regulatory requirements, such as fire, health, life-safety, and similar regulations, and the Americans with Disabilities Act, with which we may be required to comply, and which may subject us to liability in the form of fines or damages for noncompliance. Any material expenditures, fines, or damages we must pay would adversely impact our earnings and cash flows, thereby impacting our ability to service debt and make distributions to our stockholders.

The Americans with Disabilities Act generally requires that certain buildings, including office buildings, be made accessible to disabled persons. Noncompliance could result in the imposition of fines by the federal government or the award of damages to private litigants. If, under the Americans with Disabilities Act, we are required to make substantial alterations and capital expenditures in one or more of our properties, including the removal of access barriers, it could adversely impact our earnings and cash flows, thereby impacting our ability to service debt and make distributions to our stockholders.

Our properties are subject to various federal, state, and local regulatory requirements, such as state and local fire and life safety requirements. If we fail to comply with these requirements, we could incur fines or private damage awards. We do not know whether existing requirements will change or whether compliance with future requirements will require significant unanticipated expenditures that will affect our cash flow and results of operations.

Under various federal, state, and local environmental laws, ordinances, and regulations, a current or previous real property owner or operator may be liable for the cost to remove or remediate hazardous or toxic substances on, under, or in such property. These costs could be substantial. Such laws often impose liability whether or not the owner or operator knew of, or was responsible for, the presence of such hazardous or toxic substances. Environmental laws also may impose restrictions on the manner in which property may be used or businesses may be operated, and these restrictions may require substantial expenditures or prevent us from entering into leases with prospective tenants that may be impacted by such laws. Environmental laws provide for sanctions for noncompliance and may be enforced by governmental agencies or, in certain circumstances, by private parties. Certain environmental laws and common law principles could be used to impose liability for release of and exposure to hazardous substances, including asbestos-containing materials. Third parties may seek recovery from real property owners or operators for personal injury or property damage associated with exposure to released hazardous substances. The cost of defending against claims of liability, of complying with environmental regulatory requirements, of remediating any contaminated property, or of paying personal injury claims could have an adverse impact on our business and results of operations.

We have entered into fiveseven joint venture arrangements and in the future may acquire, develop, or redevelop properties in, or contribute properties to, joint ventures with other persons or entities when we believe circumstances warrant the use of such structures. We could become engaged in a dispute with one or more of our joint venture partners, which might affect our ability to operate a jointly-ownedjointly owned property. Moreover, joint venture partners may have business, economic, or other objectives that are inconsistent with our objectives, including objectives that relate to the appropriate timing and terms of any sale or refinancing of a property. In some instances, joint venture partners may have competing interests in our markets that could create conflicts of interest. Also, our joint venture partners might refuse to make capital contributions when due, and we may be responsible to our partners for indemnifiable losses. We and our partners may each have the right to trigger a buy-sell arrangement,

which could cause us to sell our interest, or acquire our partners' interest, at a time when we otherwise would not have initiated such a transaction and may result in the valuation of our interest in the joint venture (if we are the seller) or of the other partner's interest in the joint venture (if we are the buyer) at levels which may not be representative of the valuation that would result from an arm's lengtharm's-length marketing process. We are also subject to risk in cases where an institutional owner isthe following risks, the likelihood of which may be higher when our joint venture partner includingis an institutional owner and required to aggregate approvals from multiple beneficial owners: (i) a deadlock if we and our joint venture partner are unable to agree upon certain major and other decisions, (ii) the limitation of our ability to liquidate our position in the joint venture without the consent of the other joint venture partner, and (iii) the requirement to provide guarantees in favor of lenders with respect to the indebtedness of the joint venture.

In some instances we may sell our properties by providing financing to purchasers. When we provide financing to purchasers, we will bear the risk that the purchaser may default, which could negatively impact our liquidity and results of operations. Even in the absence of a purchaser default, the distribution of the proceeds of sales to our stockholders, or the reinvestment of proceeds in other assets, will be delayed until the promissory notes or other property we may accept upon a sale are actually paid, sold, refinanced, or otherwise disposed.

We rely on a small number of persons, particularly E. Nelson Mills and James A. Fleming,our executive officers, to carry out our business and investment strategies. Any of our senior management, including Messrs. Mills and Fleming,our executive officers, may cease to provide services to us at any time. The loss of the services of any of our key management personnel or our inability to recruit and retain qualified personnel in the future, could have an adverse effect on our business and financial results. Further, we compete with various other companies in attracting and retaining qualified and skilled personnel, which may require us to enhance our pay and benefits packages to compete effectively for such personnel. We will continue to try to attract and retain qualified additional senior management and other employees, but may not be able to do so on acceptable terms.

Section 404 of the Sarbanes-Oxley Act of 2002 requires that we evaluate the effectiveness of our internal control over financial reporting as of the end of each fiscal year and to include a management report assessing the effectiveness of our internal control over financial reporting. Deficiencies, including any material weakness, in our internal control over financial reporting that may occur in the future could result in misstatements of our results of operations, restatements of our financial statements, a decline in the trading price of our common stock, or otherwise materially adversely affect our business, reputation, results of operations, financial condition, or liquidity.

In addition, from time to time, the New York Stock Exchange (the "NYSE"), has experienced extreme price and volume fluctuations that have affected the market prices of equity securities of many real estate companies. In the past, stockholders have instituted securities class action litigation following periods of market volatility. If we were involved in securities litigation, we could incur substantial costs, and our resources and the attention of management could be diverted from our business. Furthermore, we currently have limited research coverage by securities and industry analysts. If additional securities or industry analysts do not commence coverage of our company,Company, the long-term trading price for our common stock could be negatively impacted. If one or more of present or future analysts who cover us downgrade our common stock or publish inaccurate or unfavorable research about our business, our stock price would likely decline. If one or more of these analysts cease coverage of us or fail to publish reports on us regularly, demand for our common stock could decrease, which could cause our stock price and trading volume to decline.

Our charter, with certain exceptions, authorizes our directors to take such actions as are necessary and desirable to preserve our qualification as a REIT. Unless exempted by our board of directors, no person may own more than 9.8% of our outstanding common stock. This restriction may have the effect of delaying, deferring, or preventing a change in control, including an extraordinary

Our organizational documents contain provisions that may discourage a takeover of us and could depress the price of our common stock. Our organizational documents contain provisions that may have an anti-takeover effect, inhibit a change of our management, or inhibit, in certain circumstances, tender offers for our common stock or proxy contests to change our board. These provisions include: ownership limits and restrictions on transferability that are intended to enable us to continue to qualify as a REIT; broad discretion of our board to take action, without stockholder approval, to issue new classes of securities that may discourage a third party from acquiring us; the ability, through board action or bylaw amendment to opt-inopt in to certain provisions of Maryland law that may impede efforts to effect a change in control of us; advance notice requirements for stockholder proposals and stockholder nominations of directors; and the absence of cumulative voting rights.

In addition, our board of directors may classify or reclassify any unissued preferred stock and establish the preferences; conversion; or other rights, voting powers, restrictions, or limitations as to distributions, qualifications, and terms or conditions of redemption of any such stock. Thus, our board of directors could authorize the issuance of preferred stock with terms and conditions that could have priority as to distributions and amounts payable upon liquidation over the rights of the holders of our common stock. Such preferred stock could also have the effect of delaying, deferring, or preventing a change in control of us, including an extraordinary transaction (such as a merger, tender offer, or sale of all or substantially all of our assets) that might provide a premium price to holders of our common stock.

Our board of directors has determined to opt out of certain provisions of Maryland law that may impede efforts to effect a change in control of us as further described below; in the case of the business combination provisions of Maryland law, by resolution of our board of directors; in the case of the control share provisions of Maryland law, pursuant to a provision in our bylaws; and in the case of certain provisions of the Maryland Unsolicited Takeover Act, pursuant to Articles Supplementary. Only upon stockholder approval of an amendment to our Articles of Incorporation may our board of directors repeal the foregoing opt-outs from the anti-takeover provisions of Maryland General Corporation Law.

Under Maryland law, "business combinations" between a Maryland corporation and certain interested stockholders or affiliates of interested stockholders are prohibited for five years after the most recent date on which the interested stockholder becomes an interested stockholder. These business combinations include a merger, consolidation, share exchange, or, in circumstances specified in the statute, an asset transfer or issuance or reclassification of equity securities. Also under Maryland law, control shares of a Maryland corporation acquired in a control share acquisition have no voting rights except to the extent approved by a vote of two-thirds of the votes entitled to be cast on the matter. Shares owned by the acquirer, an officer of the corporation, or an employee of the corporation who is also a director of the corporation are excluded from the vote on whether to accord voting rights to the control shares. These provisions may therefore discourage others from trying to acquire control of us and increase the difficulty of consummating any offer. Similarly, provisions of Title 3, Subtitle 8 of the Maryland General Corporation Law, commonly referred to as the "Maryland Unsolicited Takeover Act," could provide similar anti-takeover protection.

Our qualification as a REIT depends upon our ability to meet requirements regarding our organization and ownership, distributions of our income, the nature and diversification of our income and assets, and other tests

imposed by the Internal Revenue Code (the "Code"). The fact that we hold a substantial amount of our assets through Columbia OP and its subsidiaries and real estate ventures further complicates the application of the REIT requirements for us. If we fail to qualify as a REIT for any taxable year, we will be subject to federal and state income tax on our taxable income at corporate rates, including interest and any applicable penalties. In addition, we would generally be disqualified from treatment as a REIT for the four taxable years following the year of losing our REIT status. Losing our REIT status would reduce our net earnings available for investment or distribution to stockholders because of the additional tax liability. In addition, distributions to stockholders would no longer qualify for the dividends-paid deduction, and we would no longer be required to make distributions. If this occurs, we might be required to borrow funds or liquidate some investments in order to pay the applicable tax.

We may purchase properties and lease them back to the sellers of such properties. While we will use our best efforts to structure any such sale-leaseback transaction such that the lease will be characterized as a "true lease," thereby allowing us to be treated as the owner of the property for federal income tax purposes, we can give no assurance that the Internal Revenue Service will not challenge such characterization. In the event that any such sale-leaseback transaction is challenged and recharacterized as a financing transaction or loan for federal income tax purposes, deductions for depreciation and cost recovery relating to such property would be disallowed. If a sale-leaseback transaction were so recharacterized, we might fail to satisfy the REIT qualification asset tests or income tests and, consequently, lose our REIT status. Alternatively, the amount of our REIT taxable income could be recalculated, which might also cause us to fail to meet the distribution requirement for a taxable year.

In recent years, numerous legislative, judicial, and administrative changes have been made in the provisions of federal and state income tax laws applicable to investments similar to an investment in our shares. In particular, H.R. 1, which generally takes effect for taxable years beginning onthe comprehensive tax reform legislation enacted in December 2017 and commonly known as the Tax Cuts and Jobs Act, or after January 1, 2018 (subject to certain exceptions), makesTCJA, made many significant changes to the U.S. federal income tax laws that will profoundly impact the taxation of individuals and corporations (including both regular C corporations and corporations that have elected to be taxed as REITs). A number of changes that affect noncorporate taxpayers will expire at the end of 2025 unless Congress acts to extend them. These changes will impact us and our shareholdersstockholders in various ways, some of which are adverse or potentially adverse compared to prior law. To date,Although the IRS has issued only limited guidance with respect to certainmany of the new provisions, and there are numerous interpretive issues that will require further guidance. It is highly likely that technicalTechnical corrections legislation willmay be needed to clarify certain aspects of the new law and give proper effect to Congressional intent. There can be no assurance, however, that technical clarifications or changes needed to prevent unintended or unforeseen tax consequences will be enacted by Congress in the near future. Additional changes to tax laws are likely to continue to occur in the future, and we cannot assure investors that any such changes will not adversely affect the taxation of our stockholders. Any such changes could have an adverse effect on an investment in shares or on the market value or the resale potential of our properties. Investors are urged to consult with their own tax advisor with respect to the impact of recent legislation on ownership of shares and the status of legislative, regulatory, or administrative developments and proposals, and their potential effect on ownership of shares.

We intend to make distributions to our stockholders to comply with the requirements of the Code for REITs and to minimize or eliminate our corporate tax obligations; however, differences between the recognition of taxable income and the actual receipt of cash could require us to sell assets or borrow funds on a short-term or long-term basis to meet the distribution requirements of the Code. Certain types of assets generate substantial disparity between taxable income and available cash, such as real estate that has been financed through financing structures which require some or all of available cash flows to be used to service borrowings. In addition, changes made by H.R. 1TCJA will require us to accrue certain income for U.S. federal income tax purposes no later than when such income is taken into account as revenue on our financial statements (subject to an exception for certain income that is already

To qualify as a REIT, we must satisfy tests on an ongoing basis concerning, among other things, the sources of our income, the nature of our assets, and the amounts we distribute to our stockholders. We may be required to make distributions to stockholders at times when it would be more advantageous to reinvest cash in our business or when we do not have funds readily available for distribution. Compliance with the REIT requirements may hinder our ability to operate solely on the basis of maximizing profits.

As of December 31, 2017,2019, we owned 1917 operating properties and three properties under development or redevelopment, of which 1413 were wholly owned and fiveseven were owned through unconsolidated joint ventures. These properties are located primarily in New York, San Francisco, and Washington, D.C., and Atlanta and were approximately 96.2%97.1% leased as of December 31, 2017.2019.

The tables below include statistics for the 1412 consolidated operating properties, thatwhich we own directly, and our proportional share of the annualized lease revenue and rentable square feet for the five operating properties we own through consolidated and unconsolidated joint ventures. Annualized2019 annualized lease revenue is an operating metric, calculated as (i) annualized rental payments (defined as base rent plus operating expense reimbursements, excluding rental abatements) for executed and commenced leases as of December 31, 2017,2019, as well as leases executed but not yet commenced for vacant space that will commence within 12 months, and (ii) annualized parking revenues, payable either under the terms of an executed lease or vendor contract ("2019 Annualized Lease Revenue"). 2019 Annualized Lease Revenue excludes rental payments for executed leases that have not yet commenced for space covered by an existing lease.