Item 1A. RISK FACTORS

Risks Related to Our Business

If our wireless service provider customers combine their operations to a significant degree, our future operating results and our ability to service our indebtedness could be adversely affected.

Significant consolidation among our wireless service provider customers may result in our customers failing to renew existing leases for tower space or reducing future capital expenditures in the aggregate because their existing networks and expansion plans may overlap or be very similar, or acquired technologies may be discontinued. In connection with the combinations of Verizon Wireless and ALLTEL (to form Verizon Wireless), Cingular and AT&T Wireless (to form AT&T Mobility) and Sprint PCS and Nextel (to form Sprint), the combined companies have rationalized and may continue to rationalize duplicative parts of their networks, and, in the case of Sprint, the Nextel iDen network was discontinued, which has led and may continue to lead to the non-renewal of certain leases on our towers. During 2013, Sprint acquired Clearwire Communications and T-Mobile acquired MetroPCS, and in 2014, AT&T acquired Leap Wireless (Cricket Wireless). This consolidation may also lead to additional non-renewal of certain of our tower leases. If our wireless service provider customers continue to consolidate as a result of, among other factors, limited wireless spectrum for commercial use in the U.S., this consolidation could significantly impact the number of tower leases that are not renewed or the number of new leases that our wireless service provider customers require to expand their networks, which could materially and adversely affect our future operating results.

We have a substantial level of indebtedness which may have an adverse effect on our business or limit our ability to take advantage of business, strategic or financing opportunities.

As indicated below, we have and will continue to have a significant amount of indebtedness relative to our deficit. The following table sets forth our total principal amount of debt and shareholders’ deficit as of December 31, 2015 and 2014.

					As of December 31,
					2015			2014
					(in thousands)
Total principal amount of indebtedness					$	8,555,000		$	7,870,000
Shareholders' deficit					$	(1,706,144)		$	(660,800)

Our substantial level of indebtedness increases the possibility that we may be unable to generate cash sufficient to pay the principal, interest, or other amounts due on our indebtedness. Subject to certain restrictions under our existing indebtedness, we and our subsidiaries may also incur significant additional indebtedness in the future, some of which may be secured debt. This may have the effect of increasing our total leverage. For example, on June 10, 2015, SBA Senior Finance II secured a new $500.0 million senior secured Term Loan, and on October 14, 2015, we, through a New York common law trust, issued $500.0 million aggregate principal amount of Secured Tower Revenue Securities.

As a consequence of our indebtedness, (1) demands on our cash resources may increase, (2) we are subject to restrictive covenants that further limit our financial and operating flexibility and (3) we may choose to institute self-imposed limits on our indebtedness based on certain considerations including market interest rates, our relative leverage and our strategic plans. For example, as a result of our substantial level of indebtedness and the uncertainties arising in the credit markets and the U.S. economy:

• we may be more vulnerable to general adverse economic and industry conditions;

• we may have to pay higher interest rates upon refinancing or on our variable rate indebtedness if interest rates rise, thereby reducing our cash flows;

• we may find it more difficult to obtain additional financing to fund future working capital, capital expenditures and other general corporate requirements that would be in our best long-term interests;

• we may be required to dedicate a substantial portion of our cash flow from operations to the payment of principal and interest on our debt, reducing the available cash flow to fund other investments, including tower acquisition and new build capital expenditures;

• we may have limited flexibility in planning for, or reacting to, changes in our business or in the industry;

• we may have a competitive disadvantage relative to other companies in our industry that are less leveraged; and

• we may be required to sell debt or equity securities or sell some of our core assets, possibly on unfavorable terms, in order to meet payment obligations.

These restrictions could have a material adverse effect on our business by limiting our ability to take advantage of financing, new tower development, mergers and acquisitions or other opportunities.

In addition, fluctuations in market interest rates may increase interest expense relating to our floating rate indebtedness, which we expect to incur under our Revolving Credit Facility and Term Loans, and may make it difficult to refinance our existing indebtedness at a commercially reasonable rate or at all. There is no guarantee that the future refinancing of our indebtedness will have fixed interest rates or that interest rates on such indebtedness will be equal to or lower than the rates on our current indebtedness.

We depend on a relatively small number of customers for most of our revenue, and the loss, consolidation or financial instability of any of our significant customers may materially decrease our revenues.

We derive a significant portion of our revenue from a small number of customers. Consequently, a reduction in demand for site leasing, reduced future capital expenditures on the networks, or the loss, as a result of bankruptcy, merger with other customers of ours or otherwise, of any of our largest customers could materially decrease our revenue and have an adverse effect on our growth.

The following is a list of significant customers (representing at least 10% of revenue in any of the last three years) and the percentage of our total revenues for the specified time periods derived from these customers:

				For the year ended December 31,
Percentage of Total Revenues				2015		2014		2013
AT&T Wireless (1)				24.2%		23.0%		20.5%
Sprint				19.6%		23.4%		25.0%
T-Mobile				16.0%		15.5%		17.3%
Verizon Wireless				13.8%		12.0%		11.3%

We also have client concentrations with respect to revenues in each of our financial reporting segments:

				For the year ended December 31,
Percentage of Domestic Site Leasing Revenue				2015		2014		2013
AT&T Wireless (1)				31.9%		30.1%		25.5%
Sprint				22.3%		25.6%		30.9%
T-Mobile				19.0%		19.2%		20.2%
Verizon Wireless				16.3%		14.4%		13.3%
				For the year ended December 31,
Percentage of International Site Leasing Revenue				2015		2014		2013
Oi S.A.				48.8%		44.3%		6.3%
Telefonica				24.7%		28.8%		44.2%
Digicel				4.6%		4.9%		11.2%

				For the year ended December 31,
Percentage of Site Development Revenue				2015		2014		2013
Sprint				28.5%		36.7%		1.5%
T-Mobile				17.6%		8.5%		8.4%
Ericsson, Inc.				15.3%		16.8%		34.5%
Verizon Wireless				14.8%		10.1%		4.8%

(1)Prior year amounts have been adjusted to reflect the merger of AT&T Wireless and Leap Wireless (Cricket Wireless).

We derive revenue through numerous site leasing contracts and site development contracts. Each site leasing contract relates to the lease of space at an individual tower and is generally for an initial term of five to ten years in the U.S. and Canada, and renewable for five 5-year periods at the option of the tenant. Site leasing contracts in our Central American and South American markets typically have an initial term of ten years with multiple five year renewal periods. However, if any of our significant site leasing customers were to experience financial difficulty, substantially reduce their capital expenditures or reduce their dependence on leased tower space and fail to renew their leases with us, our revenues, future revenue growth and results of operations would be adversely affected.

Our site development customers engage us on a project-by-project basis, and a customer can generally terminate an assignment at any time without penalty. In addition, a customer’s need for site development services can decrease, and we may not be successful in establishing relationships with new customers. Furthermore, our existing customers may not continue to engage us for additional projects.

Currency fluctuations may negatively affect our results of operations.

We have business operations in Canada, Central America, and South America. Our operations in Central America and Ecuador are primarily denominated in United States Dollars, while our operations in Canada and Brazil are denominated in local currencies. Our foreign currency denominated revenues and expenses are translated into United States dollars at applicable exchange rates for inclusion in our consolidated financial statements.

For the year ended December 31, 2015, approximately 15% of our total cash site leasing revenue was generated by our International operations, of which 11.2% was generated in non-US dollar currencies, including 10.5% which was generated in Brazilian Reais. The exchange rates between our foreign currencies and the United States Dollar have fluctuated significantly recently and may continue to do so in the future. For example, the Brazilian Real has historically been subject to substantial volatility and devalued 49.2% when comparing the spot rate on January 1, 2015 and December 31, 2015. This trend has adversely affected, and may in the future continue to adversely affect, our reported results of operations.

Changes in exchange rates between these local currencies and the United States Dollar will affect the recorded levels of site leasing revenue, segment operating profit, assets and/or liabilities. Volatility in foreign currency exchange rates can also affect our ability to plan, forecast and budget for our international operations and expansion efforts.

Furthermore, we have an intercompany loan agreement which permits one of our Brazilian entities to borrow amounts up to $750.0 million. As of December 31, 2015, the outstanding balance under this agreement was $455.8 million. In accordance with ASC 830, we remeasure foreign denominated intercompany loans with the corresponding change in the balance being recorded in Other income (expense), net in our Consolidated Statements of Operations. Consequently, if the U.S. Dollar continues to strengthen against the Brazilian Real, our results of operations would be adversely affected. For the years ended December 31, 2015 and 2014, we recorded $178.9 million and $23.0 million, respectively, of foreign exchange losses on the remeasurement of intercompany loans.

If we are unable to protect our rights to the land under our towers, it could adversely affect our business and operating results.

Our real property interests relating to our tower structures consist primarily of leasehold and sub-leasehold interests, fee interests, easements, licenses, rights-of-way, and other similar interests. From time to time, we experience disputes with landowners regarding the terms of the agreements for the land under our tower structures, which can affect our ability to access and operate such towers. Further, landowners may not want to renew their agreements with us, they may lose their rights to the land, or they may transfer their land interests to third parties, including ground lease aggregators and our competitors, which could affect our ability to renew agreements on commercially viable terms or at all. In addition, the land underlying the 2,113 towers we acquired in 2013 from Oi S.A., one of Brazil’s largest telecommunications providers, is subject to a concession from the Federal Republic of Brazil that expires in 2025. At the end of the term, the Brazilian government will have the right to (i) renew the concession upon newly negotiated terms or (ii) terminate the concession and take possession of the land and the tower on such land. Although Oi S.A. has entered into a non-terminable lease with us for 35 years, if the concession is not renewed, our site leasing revenue from co-located tenants would terminate prior to the end of such lease. For the year ended December 31, 2015, we generated 13.0% of our total international site leasing revenue from these 2,113 towers of which 10.2% related to Oi S.A. and 2.8% represented revenue from co-located tenants.

As of December 31, 2015, the average remaining life under our ground leases, including renewal options under our control, was approximately 33 years, and approximately 5.8% of our tower structures have ground leases maturing in the next 10 years. Failure to protect our rights to the land under our towers may have a material adverse effect on our business, results of operations or financial condition.

New technologies or network architecture may reduce demand for our wireless infrastructure or negatively impact our revenues.

Improvements or changes in the efficiency, architecture, and design of wireless networks may reduce the demand for our wireless infrastructure. For example, new technologies that may promote network sharing, joint development, or resale agreements by our customers, such as signal combining technologies or network functions virtualization, may reduce the need for our wireless infrastructure. In addition, other technologies and architectures, such as WiFi, DAS, femtocells, other small cells, or satellite (such as low earth orbiting) and mesh transmission systems may, in the future, serve as substitutes for, or alternatives to, the traditional macro site cellular architecture that is the basis of substantially all of our site leasing business. In addition, new technologies that enhance the range, efficiency, and capacity of wireless equipment could reduce demand for our wireless infrastructure. Any significant reduction in demand for our wireless infrastructure resulting from new technologies or new architectures may negatively impact our revenues or otherwise have a material adverse effect on us.

Increasing competition may negatively impact our ability to grow our communication site portfolio long term.

We intend to continue growing our tower portfolio, domestically and internationally, through acquisitions and new builds. Our ability to meet our growth targets significantly depends on our ability to build or acquire existing towers that meet our investment requirements. Traditionally, our acquisition strategy has focused on acquiring towers from smaller tower companies, independent tower developers and wireless service providers. However, as a result of consolidation in the tower industry there are fewer of these mid-sized tower transactions available and there is more competition to acquire existing towers. Increased competition for acquisitions may result in fewer acquisition opportunities for us, higher acquisition prices, and increased difficulty in negotiating and consummating agreements to acquire such towers. For example, in 2015, we passed on more U.S. acquisitions than we did in 2014 due to asset quality, price, or lease terms. Furthermore, to the extent that the tower acquisition opportunities are for significant tower portfolios, many of our competitors are significantly larger and have greater financial resources than we do. Finally, competition regulations, domestically and internationally, may limit our ability to acquire certain portfolios or apply to us differently than they apply to our competitors. As a result of these risks, the cost of acquiring these towers may be higher than we expect or we may not be able to meet our annual and long-term tower portfolio growth targets. If we are not able to successfully address these challenges, we may not be able to materially increase our tower portfolio in the long-term.

We currently intend to build 590 to 610 new towers, domestically and internationally, during 2016. However, our ability to build these new towers is dependent upon the availability of sufficient capital to fund construction, our ability to locate, and acquire at commercially reasonable prices, attractive locations for such towers and our ability to obtain the necessary zoning and permits. Local regulations, including municipal or local ordinances, zoning restrictions and restrictive covenants imposed by community developers, vary greatly, but typically require antenna tower and structure owners to obtain approval from local officials or community standards organizations prior to tower or structure construction or modification. With respect to our international new builds, our tower construction may be delayed or halted as a result of local zoning restrictions, inconsistencies between laws or other barriers to construction in international markets. Due to these risks, it may take longer to complete our new tower builds, domestically and internationally, than anticipated, the costs of constructing these towers may be higher than we expect or we may not be able to add as many towers as we had planned in 2016. If we are not able to increase our tower portfolio as anticipated, it could negatively impact our ability to achieve our financial goals.

Our international operations are subject to economic, political and other risks that could materially and adversely affect our revenues or financial position.

Our current business operations in Canada, Central America, and South America, and our expansion into any other international markets in the future, could result in adverse financial consequences and operational problems not typically experienced in the United States. The consolidated revenues generated by our international operations were 14.9% during the year ended December 31, 2015, and we anticipate that our revenues from our international operations will continue to grow in the future. Accordingly, our business is and will in the future be subject to risks associated with doing business internationally, including:

• changes in a specific country’s or region’s political or economic conditions;

• laws and regulations that tax or otherwise restrict repatriation of earnings or other funds or otherwise limit distributions of capital;

• laws and regulations that dictate how we operate our towers and conduct business, including zoning, maintenance and environmental matters, and laws related to ownership of real property;

• laws and regulations governing our employee relations, including occupational health and safety matters;

• changes to existing or new domestic or international tax laws or fees directed specifically at the ownership and operation of towers, which may be applied and enforced retroactively;

• expropriation and governmental regulation restricting foreign ownership;

• laws effecting telecommunications infrastructure including the sharing of such infrastructure;

• restriction or revocation of spectrum licenses;

• our ability to comply with, and the costs of compliance with, anti-bribery laws such as the Foreign Corrupt Practices Act and similar local anti-bribery laws;

• our ability to compete with owners and operators of wireless towers that have been in the international market for a longer period of time than we have;

• uncertainties regarding legal or judicial systems, including inconsistencies between and within laws, regulations and decrees, and judicial application thereof, and delays in the judicial process;

• health or similar issues, such as a pandemic or epidemic;

• difficulty in recruiting and retaining trained personnel; and

• language and cultural differences.

A slowdown in demand for wireless communications services or for tower space could materially and adversely affect our future growth and revenues, and we cannot control that demand.

Additional revenue growth on our towers other than through contractual escalators comes directly from additional investment by our wireless service provider customers in their networks. If wireless service subscribers significantly reduce their minutes of use or data usage, or fail to widely adopt and use wireless data applications, our wireless service provider customers would experience a decrease in demand for their services. Regardless of consumer demand, each wireless service customer must have substantial capital resources and capabilities to build out their wireless networks, including licenses for spectrum. In addition, our wireless service customers have engaged in increased use of network sharing, roaming or resale arrangements. As a result of all of the above, wireless carriers may scale back their business plans or otherwise reduce their spending, which could materially and adversely affect demand for our tower space and our wireless communications services business, which could have a material adverse effect on our business, results of operations and financial condition.

We may not be able to fully recognize the anticipated benefits of towers that we acquire.

A key element of our growth strategy is to increase our tower portfolio through acquisitions. We rely on our due diligence of the towers and the representations and financial records of the sellers and other third parties to establish the anticipated revenues and expenses and whether the acquired towers will meet our internal guidelines for current and future potential returns. In addition, we may not always have the ability to analyze and verify all information regarding title, access and other issues regarding the land underlying acquired towers. This is particularly true in our international acquisitions of towers from wireless service providers. To the extent that these towers were acquired in individually material transactions, we may be required to place enhanced reliance on the financial and operational representations and warranties of the sellers. If (i) these records are not complete or accurate, (ii) we do not have complete access to, or use of, the land underlying the acquired towers or (iii) the towers do not achieve the financial results anticipated, it could adversely affect our revenues and results of operations.

In addition, acquisitions which would be material in the aggregate may exacerbate the risks inherent with our growth strategy, such as (i) an adverse impact on our overall profitability if the acquired towers do not achieve the financial results projected in our valuation models, (ii) unanticipated costs associated with the acquisitions that may impact our results of operations for a period, (iii) increased demands on our cash resources that may, among other things, impact our ability to explore other opportunities, (iv) undisclosed and assumed liabilities that we may be unable to recover, (v) increased vulnerability to general economic conditions, (vi) an adverse impact on our existing customer relationships, (vii) additional expenses and exposure to new regulatory, political and economic risks if such acquisitions were in new jurisdictions and (viii) diversion of managerial attention.

We may not successfully integrate acquired towers into our operations.

As part of our growth strategy, we have made and expect to continue to make acquisitions. The process of integrating any acquired towers into our operations may result in unforeseen operating difficulties and large expenditures and may absorb significant management attention that would otherwise be available for the ongoing development of our business. It may also result in the loss of key customers and/or personnel and expose us to unanticipated liabilities. These risks may be exacerbated in those circumstances in which we acquire a material number of towers. Further, we may not be able to retain the key employees that may be necessary to operate the business we acquire, and we may not be able to timely attract new skilled employees and management to replace them.

There can be no assurance that we will be successful in integrating acquisitions into our existing business. This is particularly true in our international acquisitions of towers from wireless service providers.

Delays or changes in the deployment or adoption of new technologies or slowing consumer adoption rates may have a material adverse effect on our growth rate.

There can be no assurances that 3G, 4G, including long-term evolution (“LTE”), advanced wireless service in the 1695-1710 MHz, 1755-1780 MHz, and 2155-2180 MHz bands (the “AWS-3” bands), or other new wireless technologies such as 5G will be deployed or adopted as rapidly as projected or that these new technologies will be implemented in the manner anticipated. The deployment of 3G experienced delays from the original projected timelines of the wireless and broadcast industries, and continued deployment of 4G could experience delays. Additionally, the demand by consumers and the adoption rate of consumers for these new technologies once deployed may be lower or slower than anticipated, particularly in certain of our international markets. These factors could have a material adverse effect on our growth rate since growth opportunities and demand for our tower space as a result of such new technologies may not be realized at the times or to the extent anticipated.

Increasing competition in the tower industry may create pricing pressures that may materially and adversely affect us.

Our industry is highly competitive, and our customers sometimes have alternatives for leasing antenna space. Some of our competitors, such as (1) U.S. and international wireless carriers that allow co-location on their towers and (2) large independent tower companies, have been, and based on recent consolidations continue to be, substantially larger and have greater financial resources than we do. This could provide them with advantages with respect to establishing favorable leasing terms with wireless service providers or in their ability to acquire available towers.

In the site leasing business, we compete with:

• wireless service providers that own and operate their own towers and lease, or may in the future decide to lease, antenna space to other providers;

• national and regional tower companies; and

• alternative facilities such as rooftops, outdoor and indoor DAS networks, billboards and electric transmission towers.

We believe that tower location and capacity, quality of service, density within a geographic market and, to a lesser extent, price historically have been and will continue to be the most significant competitive factors affecting the site leasing business. However, competitive pricing pressures for tenants on towers from these competitors could materially and adversely affect our lease rates. In addition, we may not be able to renew existing customer leases or enter into new customer leases, resulting in a material adverse impact on our results of operations and growth rate. Increasing competition could also make the acquisition of high quality tower assets more costly, or limit the acquisition opportunities altogether. Any of these factors could materially and adversely affect our business, results of operations or financial condition.

The site development segment of our industry is also extremely competitive. There are numerous large and small companies that offer one or more of the services offered by our site development business. As a result of this competition, margins in this segment may come under pressure. Many of our competitors have lower overhead expenses and therefore may be able to provide services at prices that we consider unprofitable. If margins in this segment were to decrease, our consolidated revenues and our site development segment operating profit could be adversely affected.

The documents governing our indebtedness contain restrictive covenants that could adversely affect our business by limiting our flexibility.

The indentures governing the 5.75% Notes, the 5.625% Notes and the 4.875% Notes, the Senior Credit Agreement, and the Secured Tower Revenue Securities contain restrictive covenants imposing significant operational and financial restrictions on us, including restrictions that may limit our ability to engage in acts that may be in our long-term best interests. Among other things, the covenants under each indenture limit our ability to:

• merge, consolidate or sell assets;

• make restricted payments, including pay dividends or make other distributions;

• enter into transactions with affiliates;

• enter into sale and leaseback transactions; and

• issue guarantees of indebtedness.

We are required to maintain certain financial ratios under the Senior Credit Agreement. The Senior Credit Agreement, as amended, requires SBA Senior Finance II to maintain specific financial ratios, including (1) a ratio of Consolidated Total Debt to Annualized Borrower EBITDA not to exceed 6.5 times for any fiscal quarter, (2) a ratio of Consolidated Total Debt and Net Hedge Exposure (calculated in accordance with the Senior Credit Agreement) to Annualized Borrower EBITDA for the most recently ended fiscal quarter not to exceed 6.5 times for 30 consecutive days and (3) a ratio of Annualized Borrower EBITDA to Annualized Cash Interest Expense (calculated in accordance with the Senior Credit Agreement) of not less than 2.0 times for any fiscal quarter.

Additionally, the mortgage loan relating to our Tower Securities contains financial covenants that require that the mortgage loan borrowers maintain, on a consolidated basis, a minimum debt service coverage ratio. To the extent that the debt service coverage ratio, as of the end of any calendar quarter, falls to 1.30 times or lower, then all cash flow in excess of amounts required to make debt service payments, to fund required reserves, to pay management fees and budgeted operating expenses and to make other payments required under the loan documents, referred to as “excess cash flow,” will be deposited into a reserve account instead of being released to the Borrowers. The funds in the reserve account will not be released to the Borrowers unless the debt service coverage ratio exceeds 1.30 times for two consecutive calendar quarters. If the debt service coverage ratio falls below 1.15 times as of the end of any calendar quarter, then an “amortization period” will commence and all funds on deposit in the reserve account will be applied to prepay the mortgage loan until such time that the debt service coverage ratio exceeds 1.15 times for a calendar quarter.

These covenants could place us at a disadvantage compared to some of our competitors which may have fewer restrictive covenants and may not be required to operate under these restrictions. Further, these covenants could have an adverse effect on our business by limiting our ability to take advantage of financing, new tower development, merger and acquisitions or other opportunities. If we fail to comply with these covenants, it could result in an event of default under our debt instruments. If any default occurs, all amounts outstanding under our outstanding notes and the Senior Credit Agreement may become immediately due and payable.

Our variable rate indebtedness and refinancing obligations subject us to interest rate risk, which could cause our debt service obligations to increase significantly.

Fluctuations in market interest rates may increase interest expense relating to our floating rate indebtedness, which we expect to incur under the Revolving Credit Facility and Term Loans or upon refinancing our fixed rate debt. As a result, we are exposed to interest rate risk. If interest rates were to increase, our debt service obligations on the variable rate indebtedness would increase even though the amount borrowed remained the same, and our net income and cash flows, including cash available for servicing our indebtedness, will correspondingly decrease. There is no guarantee that any future refinancing of our indebtedness will have fixed interest rates or that interest rates on such indebtedness will be equal to or lower than the rates on our current indebtedness. In the future, we may enter into interest rate swaps that involve the exchange of floating for fixed rate interest payments in order to reduce interest rate volatility. However, we may not maintain interest rate swaps with respect to all of our variable rate indebtedness, and any swaps we enter into may not fully mitigate our interest rate risk. We currently have no interest rate swaps.

Our dependence on our subsidiaries for cash flow may negatively affect our business.

We are a holding company with no business operations of our own. Our only significant assets are, and are expected to be, the outstanding capital stock and membership interests of our subsidiaries. We conduct, and expect to continue conducting, all of our business operations through our subsidiaries. Accordingly, our ability to pay our obligations is dependent upon dividends and other distributions from our subsidiaries to us. Most of our indebtedness is owed directly by our subsidiaries, including the mortgage loan underlying the Tower Securities, the 5.75% Notes, the Term Loans and any amounts that we may borrow under the Revolving Credit Facility. Consequently, the first use of any cash flow from operations generated by such subsidiaries will be payments of interest and principal, if any, under their respective indebtedness. Other than the cash required to repay amounts due under our 5.625% Notes and 4.875% Notes, we currently expect that substantially all the earnings and cash flow of our subsidiaries will be retained and used by them in their operations, including servicing their respective debt obligations. The ability of our operating subsidiaries to pay dividends or transfer assets to us is restricted by applicable state law and contractual restrictions, including the terms of their outstanding debt instruments.

Our quarterly operating results for our site development services fluctuate and therefore we may not be able to adjust our cost structure on a timely basis with regard to such fluctuations.

The demand for our site development services fluctuates from quarter to quarter and should not be considered indicative of long-term results. Numerous factors cause these fluctuations, including:

• the timing and amount of our customers’ capital expenditures;

• the size and scope of our projects;

• the business practices of customers, such as deferring commitments on new projects until after the end of the calendar year or the customers’ fiscal year;

• delays relating to a project or tenant installation of equipment;

• seasonal factors, such as weather, holidays and vacation days and total business days in a quarter;

• the use of third party providers by our customers;

• the rate and volume of wireless service providers’ network development; and

• general economic conditions.

Although the demand for our site development services fluctuates, we incur significant fixed costs, such as maintaining a staff and office space, in anticipation of future contracts. In addition, the timing of revenues is difficult to forecast because our sales cycle may be relatively long. Therefore, we may not be able to adjust our cost structure on a timely basis to respond to the fluctuations in demand for our site development services.

We have not been profitable and may incur losses in the future.

Historically, we have not been profitable. The following chart shows the net losses we incurred for the periods indicated:

		For the year ended December 31,
		2015			2014			2013
		(in thousands)
Net loss		$	(175,656)		$	(24,295)		$	(55,909)

Our losses are principally due to depreciation, amortization and accretion expenses, interest expense (including non-cash interest expense and amortization of deferred financing fees), losses from the extinguishment of debt in the periods presented above, and in 2015, remeasurement losses related to a foreign currency denominated intercompany loan.

The loss of the services of certain of our key personnel or a significant number of our employees may negatively affect our business.

Our success depends to a significant extent upon performance and active participation of our key personnel. We cannot guarantee that we will be successful in retaining the services of these key personnel. We have employment agreements with Jeffrey A. Stoops, our President and Chief Executive Officer, Kurt L. Bagwell, our Executive Vice President and President—International, Thomas P. Hunt, our Executive Vice President, Chief Administrative Officer and General Counsel, and Brendan T. Cavanagh, our Executive Vice President and Chief Financial Officer. We do not have employment agreements with any of our other key personnel. If we were to lose any key personnel, we may not be able to find an appropriate replacement on a timely basis and our results of operations could be negatively affected. Further, the loss of a significant number of employees or our inability to hire a sufficient number of qualified employees could have a material adverse effect on our business.

Our business is subject to government regulations and changes in current or future regulations could harm our business.

We are subject to federal, state and local regulation of our business, both in the U.S. and internationally. In the U.S., both the FAA and the FCC regulate the construction, modification, and maintenance of towers and structures that support antennas used for wireless communications and radio and television broadcasts. In addition, the FCC separately licenses and regulates wireless communications equipment and television and radio stations operating from such towers. FAA and FCC regulations govern construction, lighting, painting, and marking of towers and may, depending on the characteristics of the tower, require registration of the tower. Certain proposals to construct new towers or to modify existing towers are reviewed by the FAA to ensure that the tower will not present a hazard to air navigation.

Tower owners may have an obligation to mark or paint such towers or install lighting to conform to FAA and FCC regulations and to maintain such marking, painting and lighting. Tower owners may also bear the responsibility of notifying the FAA of any lighting outages. Certain proposals to operate wireless communications and radio or television stations from towers are also reviewed by the FCC to ensure compliance with environmental impact requirements established in federal statutes, including NEPA, NHPA and ESA. Failure to comply with existing or future applicable requirements may lead to civil penalties or other liabilities and may subject us to significant indemnification liability to our customers against any such failure to comply. In addition, new regulations may impose additional costly burdens on us, which may affect our revenues and cause delays in our growth.

Local regulations, including municipal or local ordinances, zoning restrictions and restrictive covenants imposed by community developers, vary greatly, but typically require tower owners to obtain approval from local officials or community standards organizations prior to tower construction or modification. Local regulations can delay, prevent, or increase the cost of new construction, co-locations, or site upgrades, thereby limiting our ability to respond to customer demand. In addition, new regulations may be adopted that increase delays or result in additional costs to us. Furthermore, with respect to our international new builds, our tower construction may be delayed or halted as a result of local zoning restrictions, inconsistencies between laws or other barriers to construction in international markets. These factors could have a material adverse effect on our future growth and operations.

Security breaches and other disruptions could compromise our information, which would cause our business and reputation to suffer.

A part of our day-to-day operations, we rely on information technology and other computer resources and infrastructure to carry out important business activities and to maintain our business records. Our computer systems could fail on their own accord and are subject to interruption or damage from power outages, computer and telecommunications failures, computer viruses, security breaches (including through cyber-attack and data theft), errors, catastrophic events such as natural disasters and other events beyond our control. If our computer systems and our backup systems are compromised, degraded, damaged, or breached, or otherwise cease to function properly, we could suffer interruptions in our operations or unintentionally allow misappropriation of proprietary or confidential information (including information about our tenants or landlords). This could damage our reputation and disrupt our operations and the services we provide to customers, which could adversely affect our business and operating results.

Our towers are subject to damage from natural disasters.

Our towers are subject to risks associated with natural disasters such as tornadoes, hurricanes and earthquakes. We maintain insurance to cover the estimated cost of replacing damaged towers, but these insurance policies are subject to loss limits and deductibles. We also maintain third party liability insurance, subject to loss limits and deductibles, to protect us in the event of an accident involving a tower. A tower accident for which we are uninsured or underinsured, or damage to a significant number of our towers, could require us to incur significant expenditures and may have a material adverse effect on our operations or financial condition.

To the extent that we are not able to meet our contractual obligations to our customers, due to a natural disaster or other catastrophic circumstances, our customers may not be obligated or willing to pay their lease expenses; however, we would be required to continue paying our fixed expenses related to the affected tower, including ground lease expenses. If we are unable to meet our contractual obligations to our customers for a material portion of our towers, our operations could be materially and adversely affected.

We could have liability under environmental laws that could have a material adverse effect on our business, financial condition and results of operations.

Our operations, like those of other companies engaged in similar businesses, are subject to the requirements of various federal, state, local and foreign environmental and occupational safety and health laws and regulations, including those relating to the

management, use, storage, disposal, emission and remediation of, and exposure to, hazardous and non-hazardous substances, materials, and wastes. As owner, lessee, or operator of numerous tower structures, we may be liable for substantial costs of remediating soil and groundwater contaminated by hazardous materials without regard to whether we, as the owner, lessee, or operator, knew of or were responsible for the contamination. We may be subject to potentially significant fines or penalties if we fail to comply with any of these requirements. The current cost of complying with these laws is not material to our financial condition or results of operations. However, the requirements of these laws and regulations are complex, change frequently, and could become more stringent in the future. It is possible that these requirements will change or that liabilities will arise in the future in a manner that could have a material adverse effect on our business, financial condition and results of operations.

We could suffer adverse tax and other financial consequences if taxing authorities do not agree with our tax positions, or we are unable to utilize our net operating losses.

We are periodically subject to a number of tax examinations by taxing authorities in the states and countries where we do business. We also have significant deferred tax assets related to our net operating losses (“NOLs”) in U.S. federal and state taxing jurisdictions. Generally, for U.S. federal and state tax purposes, NOLs can be carried forward and used for up to twenty years, and all of our tax years will remain subject to examination until three years after our NOLs are used or expire. We expect that we will continue to be subject to tax examinations in the future. In addition, U.S. federal, state and local, as well as international, tax laws and regulations are extremely complex and subject to varying interpretations. We recognize tax benefits of uncertain tax positions when we believe the positions are more likely than not of being sustained upon a challenge by the relevant tax authority. We believe our judgments in this area are reasonable and correct, but there is no guarantee that we will be successful if challenged by a tax authority. If there are tax benefits, including from our use of NOLs or other tax attributes, that are challenged successfully by a taxing authority, we may be required to pay additional taxes or we may seek to enter into settlements with the taxing authorities, which could require significant payments or otherwise have a material adverse effect on our business, results of operations and financial condition.

In addition, we may be limited in our ability to utilize our NOLs to offset future taxable income and thereby reduce our otherwise payable income taxes. We have substantial federal and state NOLs, including significant portions obtained through acquisitions and dispositions, as well as those generated through our historic business operations. In addition, we have disposed of some entities and restructured other entities in conjunction with financing transactions and other business activities.

To the extent we believe that a position with respect to an NOL is not more likely than not to be sustained, we do not record the related deferred tax asset. In addition, for NOLs that meet the recognition threshold, we assess the recoverability of the NOL and establish a valuation allowance against the deferred tax asset related to the NOL if recoverability is questionable. Given the uncertainty surrounding the recoverability of certain of our NOLs, we have established a valuation allowance to offset the related deferred tax asset.

Our ability to utilize our NOLs is also dependent, in part, upon us having sufficient future earnings to utilize our NOLs before they expire. If market conditions change materially and we determine that we will be unable to generate sufficient taxable income in the future to utilize our NOLs, we could be required to record an additional valuation allowance. We review our uncertain tax position and the valuation allowance for our NOLs periodically and make adjustments from time to time, which can result in an increase or decrease to the net deferred tax asset related to our NOLs.

Our issuance of equity securities and other associated transactions may trigger a future ownership change which may negatively impact our ability to utilize NOLs in the future.

The issuance of equity securities and other associated transactions may increase the chance that we will have a future ownership change under Section 382 of the Internal Revenue Code of 1986. We may also have a future ownership change, outside of our control, caused by future equity transactions by our current shareholders. Depending on our market value at the time of such future ownership change, an ownership change under Section 382 could negatively impact our ability to utilize our NOLs in the event we generate future taxable income. Currently, we have recorded a full valuation allowance against our NOLs because we have concluded that our loss history indicates that it is not “more likely than not” that such deferred tax assets will be realized.

Future sales of our Class A common stock in the public market or the issuance of other equity may cause dilution or adversely affect the market price of our Class A common stock and our ability to raise funds in new equity or equity-related offerings.

Sales of a substantial number of shares of our Class A common stock or other equity-related securities in the public market, including sales by any selling shareholder, could depress the market price of our Class A common stock and impair our ability to raise capital through the sale of additional equity securities.

Our costs could increase and our revenues could decrease due to perceived health risks from RF energy.

The U.S. government imposes requirements and other guidelines relating to exposure to RF energy. Exposure to high levels of RF energy can cause negative health effects. The potential connection between exposure to low levels of RF energy and certain negative health effects, including some forms of cancer, has been the subject of substantial study by the scientific community in recent years. According to the FCC, the results of these studies to date have been inconclusive. However, public perception of possible health risks associated with cellular and other wireless communications media could slow the growth of wireless companies, which could in turn slow our growth. In particular, negative public perception of, and regulations regarding, health risks could cause a decrease in the demand for wireless communications services. Moreover, if a connection between exposure to low levels of RF energy and possible negative health effects, including cancer, were demonstrated, we could be subject to numerous claims. Our current policies provide no coverage for claims based on RF energy exposure. If we were subject to claims relating to exposure to RF energy, even if such claims were not ultimately found to have merit, our financial condition could be materially and adversely affected.

Our articles of incorporation, our bylaws and Florida law provide for anti-takeover provisions that could make it more difficult for a third party to acquire us.

Provisions of our articles of incorporation, our bylaws and Florida law could make it more difficult for a third party to acquire us, even if doing so would be beneficial to our shareholders. These provisions, alone or in combination with each other, may discourage transactions involving actual or potential changes of control, including transactions that otherwise could involve payment of a premium over prevailing market prices to holders of our Class A common stock, or could limit the ability of our shareholders to approve transactions that they may deem to be in their best interests.