AMT

American Tower Corporation

We are a leading wireless and broadcast communications infrastructure company that develops, owns, and operates communications sites, including wireless communications towers, broadcast communications towers and distributed antenna system (“DAS”) networks. Our portfolio of wireless and broadcast towers consists of towers that we own and towers that we operate pursuant to long-term lease arrangements, including, as of December 31, 2009, approximately 20,000 towers in the United States and approximately 7,000 towers in Mexico, Brazil and India. Our portfolio also includes approximately 200 in-building DAS networks that we operate in malls, casinos and other in-building applications in the United States and Mexico and one outdoor DAS network in development in the United States. In addition to the communications sites in our portfolio, we manage rooftop and tower sites for property owners in the United States, Mexico and Brazil.

Our primary business is leasing antenna space on multi-tenant communications sites to wireless service providers and radio and television broadcast companies. This segment of our business, which we refer to as our rental and management segment, accounted for approximately 97%, 97% and 98% of our total revenues for the years ended December 31, 2009, 2008 and 2007, respectively. Through our network development services segment, we also offer tower-related services in the United States, including site acquisition, zoning and permitting services and structural analysis services, which directly support our site leasing business and the addition of new tenants and equipment on our sites.

We have historically focused on our rental and management segment due to its high operating leverage and low cash flow volatility when compared to our network development services segment. Our rental and management segment has generated consistent incremental growth in revenue and cash flows due to the following characteristics:

• Long-term tenant leases with contractual escalations. In general, a lease with a wireless carrier has an initial term of five to ten years with multiple five-year renewal terms thereafter, and lease payments that typically increase 3% to 5% per year.

• High lease renewal rates. Wireless carriers tend to renew leases because suitable alternative sites may not exist or be available and repositioning a site in a carrier’s network may be expensive and may adversely affect the quality of the carrier’s network.

• High operating leverage. Incremental operating costs associated with adding wireless tenants to a communications site are minimal. Therefore, as additional tenants are added to a site, the substantial majority of incremental revenue flows through to operating profit.

• Low maintenance capital expenditures. On average, we require low amounts of annual capital expenditures to maintain our communications sites.

Additionally, our communications site portfolio provides us with growth potential because we have the ability to add new tenants, and new equipment for existing tenants, on our sites. In the United States, our largest geographic area, our nationwide network of communications sites enables us to address the needs of national, regional, local and emerging wireless service providers. Our diverse site portfolio and our established customer base provide us with a diverse source of new business opportunities, which has historically resulted in consistent and predictable revenue growth. Our operations in the United States accounted for approximately 85%, 86% and 87% of our total revenues for the years ended December 31, 2009, 2008 and 2007, respectively.

Our international site leasing business, which is comprised of communications sites in Mexico, Brazil and India, provides a source of diversification and growth for our rental and management segment. Our international site leasing business accounted for approximately 15%, 14% and 13% of our total revenues for the years ended December 31, 2009, 2008 and 2007, respectively. In developing our international site portfolio, we have focused on building and acquiring communications sites in high demand areas to meet the needs of our customers.

The Company

American Tower Corporation was created as a subsidiary of American Radio Systems Corporation in 1995 to own, manage, develop and lease communications and broadcast tower sites, and was spun off into a free-standing public company in 1998. Since inception, we have grown our communications site portfolio through acquisitions, long-term lease arrangements, development and construction, and through mergers with and acquisitions of other tower operators, increasing the size of our portfolio to over 27,200 communications sites.

American Tower Corporation is a holding company, and we conduct our operations through our directly and indirectly owned subsidiaries. Our principal United States operating subsidiaries are American Towers, Inc. (“ATI”) and SpectraSite Communications, LLC (“SpectraSite”). We conduct our international operations through our subsidiary, American Tower International, Inc., which in turn conducts operations through its various international operating subsidiaries. Our international operations consist of our operations in Mexico, Brazil and India.

Products and Services

Rental and Management Segment

Our primary business is our communications site leasing business, which we conduct through our rental and management segment. This segment accounted for approximately 97%, 97% and 98% of our total revenues for the years ended December 31, 2009, 2008 and 2007, respectively. Our rental and management segment is comprised of our domestic and international site leasing business, including the operation of wireless communications towers, broadcast communications towers and DAS networks, as well as rooftop management.

Wireless Communications Towers. We are a leading independent owner and operator of wireless communications towers in the United States, Mexico and Brazil, based on number of towers and revenue. We also own and operate communications towers in India, where we commenced operations in the second half of 2007. In addition to owning wireless communications towers, we also manage wireless communications sites for property owners in the United States, Mexico and Brazil. Approximately 94%, 92% and 91% of our rental and management segment revenue was attributable to our wireless towers for the years ended December 31, 2009, 2008 and 2007, respectively.

We lease space on our wireless communications towers to customers in a diverse range of wireless industries, including personal communications services, cellular, enhanced specialized mobile radio, WiMAX, paging and fixed microwave. Our three largest wireless customers by revenue in each country are as follows:

• United States: AT&T Mobility, Sprint Nextel and Verizon Wireless;

• Mexico: Grupo Iusacell, Nextel International and Telefonica (Movistar);

• Brazil: Nextel International, America Movil (Claro) and Vivo;

• India: Vodafone, Idea and Aircel.

For the year ended December 31, 2009, we had three customers that each accounted for 10% or more of our total revenues. AT&T Mobility, Sprint Nextel and Verizon Wireless accounted for approximately 19%, 18% and 15%, respectively, of our 2009 total revenues. Approximately 61% of our total revenues for the year ended December 31, 2009 were derived from four customers. As a result, we are subject to certain risks, as set forth in Item 1A of this Annual Report under the caption “Risk Factors—Due to the long-term expectations of revenue from tenant leases, we are sensitive to the credit worthiness of our tenants” and “A substantial portion of our revenue is derived from a small number of customers.” In addition, we are subject to risks related to our international operations, as set forth under the caption “Risk Factors—Our foreign operations are subject to economic, political and other risks that could adversely affect our revenues or financial position.”

Our leases with wireless communications providers in the markets we serve generally have initial non-cancelable terms of five to ten years. In most cases, our tenant leases have multiple five-year renewal terms at the option of the tenant. Wireless carriers generally renew their leases with us because suitable alternative sites may not exist or be available and repositioning a site in an existing carrier’s network may be expensive and often requires reconfiguring several other sites within the carrier’s network, which may impact the carrier’s network quality and coverage and may also require the carrier to obtain other governmental permits. Most of our tenant leases have escalation provisions that periodically increase the rent due under the lease. These automatic increases are typically annual and are based on a fixed percentage (generally three to five percent), inflation or a fixed percentage plus inflation.

Annual rental payments vary considerably depending upon various factors including:

• tower location;

• amount and function of the customer’s equipment on the tower;

• ground space necessary for the customer’s electronic and other equipment related to the antennas;

• remaining tower capacity;

• shared back-up power infrastructure;

• type of tower structure (e.g., stealth or camouflage tower); and

• location of the customer’s antennas on the tower.

The number of antenna arrays that our towers can accommodate varies depending on the tower’s location, height, and structural capacity at certain wind speeds. As of December 31, 2009, our towers had an average of approximately 2.4 tenants per tower. We believe that a significant majority of our towers have the capacity to add new tenants, and new equipment for existing tenants, without the need to make capital investments to augment the structure. We believe that nearly all of our towers that are currently at or near full structural capacity can be upgraded or augmented to meet future leasing demand with relatively minor capital investment by strengthening its foundation, increasing its height or reinforcing the steel crossbars. In the United States, a portion of these upgrade and augmentation costs are generally shared with the customer, resulting in a short payback period for our net capital investment.

Broadcast Communications Towers. We are one of the largest independent owners and operators of broadcast towers in the United States and Mexico. We own approximately 230 broadcast towers in the United States and have exclusive rights to approximately 200 broadcast towers in Mexico. Broadcast towers generally are taller and structurally more complex than wireless communications towers, require unique engineering skills and are more costly to build. We lease space on our broadcast towers to a variety of customers including wireless service providers, but the higher elevations on these towers are primarily leased to radio and television broadcast companies. In leasing tower space to radio and broadcast companies, we generally receive monthly fees, with initial non-cancelable lease terms ranging from ten to twenty years. For the years ended December 31, 2009, 2008 and 2007, approximately 6%, 6% and 7%, respectively, of our rental and management segment revenue was attributable to our broadcast communications towers.

DAS Networks. We provide in-building and outdoor DAS networks in the United States. We own and operate approximately 200 in-building DAS networks in malls, casinos and other in-building applications in the United States and Mexico. We obtain rights to install and operate in-building DAS networks by entering into contracts with property owners, and we grant rights to wireless service providers to attach their equipment to our in-building DAS networks for a fee under licenses that typically have an initial non-cancelable term of at least ten years.

We offer outdoor DAS networks as a complementary shared infrastructure solution for our customers. Typically, we design, build and operate our outdoor DAS networks in areas in which zoning restrictions or other barriers may prevent or delay deployment of more traditional wireless structures. Similar to our in-building DAS networks, our customer agreements for our outdoor DAS networks typically have an initial non-cancelable term of at least ten years.

For the years ended December 31, 2009, 2008 and 2007, approximately 1% of our rental and management segment revenue was attributable to our DAS networks.

Rooftop Management. We also provide management services to property owners in the United States, Mexico and Brazil who own rooftops that are capable of hosting wireless communications equipment. We obtain rights to manage a rooftop by entering into contracts with property owners pursuant to which we receive a percentage of occupancy or license fees paid by the wireless carriers and other tenants. For the years ended December 31, 2009, 2008 and 2007, approximately 1% of our rental and management segment revenue was attributable to rooftop management.

Network Development Services Segment

We offer tower-related services, including site acquisition, zoning and permitting services and structural analysis services, through our network development services segment. This segment accounted for approximately 3%, 3% and 2% of our total revenues for the years ended December 31, 2009, 2008 and 2007, respectively.

Site Acquisition, Zoning and Permitting Services. We engage in site acquisition services on our own behalf in connection with our tower development projects, as well as on the behalf of our customers. We typically work with our customers’ engineers to determine the geographic areas where a new tower site will best address the customers’ needs and meet their coverage objectives. Once a new site is identified, we acquire the rights to the land or structure on which the site will be constructed, and we manage the permitting process to ensure all necessary approvals are obtained to construct and operate the communications site under applicable law.

Structural Analysis. We offer structural analysis services to wireless carriers in connection with the installation of communications equipment on towers. Our team of engineers can evaluate whether a tower can support the additional burden of the new equipment or if augmentation is needed, which enables our customers to better assess potential sites before making an installation decision. Our structural analysis capabilities enable us to provide higher quality service to our existing customers by, among other things, reducing cycle times related to tower structural analysis, as well as provide opportunities to offer structural analysis services to third parties.

Recent Developments

Growth and Expansion

In 2009, we continued to focus on our strategy of growing our operations using selective criteria for acquisitions and new site development, including expansion into new international geographic areas. During the year ended December 31, 2009, we grew our communications site portfolio through acquisitions and construction activities, including the acquisition and construction of 3,529 towers and the installation of 20 in-building and one outdoor DAS networks. In addition, we continue to evaluate opportunities to acquire larger communications site portfolios that we believe we can effectively integrate into our portfolio.

United States. During 2009, in response to the needs of our customers, we pursued the acquisition and construction of communications sites in select locations throughout the United States. Our expansion in the United States during 2009 included the acquisition and construction of 507 towers and the installation of 21 in-building and outdoor DAS networks.

Latin America. During 2009, the majority of our expansion efforts in Latin America were focused in Brazil as our customers sought to increase the density of their networks following a recent wireless spectrum auction. Our expansion in Latin America during 2009 included the acquisition and construction of 578 towers.

Asia. During 2009, we expanded our presence and increased our footprint in India through the acquisitions of XCEL Telecom Private Limited (“XCEL”) and Insight Infrastructure Pte. Ltd. (“Insight”), as well as the construction of new communications sites. In 2009, we acquired and constructed 2,444 towers.

Financing Transactions

During the year ended December 31, 2009, we improved our financial position by raising capital to refinance and repurchase a portion of our outstanding indebtedness, which increased our flexibility and our ability to return value to our stockholders. Significant transactions included those set forth below.

Senior Notes Offerings. In June and October of 2009, we completed institutional private placements of $300.0 million aggregate principal amount of our 7.25% senior unsecured notes due 2019 (“7.25% Notes”) and $600.0 million aggregate principal amount of our 4.625% senior unsecured notes due 2015 (“4.625% Notes”), respectively. We used the net proceeds from the offering of the 7.25% Notes to finance the repurchase and redemption of our outstanding 7.50% senior notes due 2012 (“7.50% Notes”) and to repay certain of our indebtedness incurred under our $1.25 billion senior unsecured revolving credit facility (“Revolving Credit Facility”). We used the net proceeds from the offering of the 4.625% Notes primarily to finance the redemption of our outstanding 7.125% senior notes due 2012 (“7.125% Notes”).

Repurchases and Redemption of Debt Securities. During the year ended December 31, 2009, we repurchased or redeemed approximately $725.1 million face amount of our outstanding debt securities, including the repurchase and redemption of $225.0 million principal amount of our 7.50% Notes, the redemption of $500.0 million principal amount of our 7.125% Notes and the redemption of $0.1 million principal amount of our 3.00% convertible notes due August 15, 2012 (“3.00% Notes”).

Stock Repurchase Program. In 2009, we continued to repurchase shares of our Class A common stock (“Common Stock”) pursuant to our publicly announced stock repurchase program. In February 2008, our Board of Directors approved a stock repurchase program, pursuant to which we are authorized to purchase up to $1.5 billion of our Common Stock (“2008 Buyback”). During the year ended December 31, 2009, we repurchased 6.6 million shares of our Common Stock for an aggregate of $214.7 million, including commissions and fees, pursuant to the 2008 Buyback.

Employees

As of December 31, 2009, we employed 1,420 full-time individuals and consider our employee relations to be satisfactory.