Thanks Mark. Good evening. We had a tremendous fourth quarter with very strong results across all areas of our business, including very positive operating and financial results in both our leasing and services businesses. Total GAAP site leasing revenues for the fourth quarter were $444.7 million, and cash site leasing revenues were $441.8 million. Foreign exchange rates were generally in line with our estimates for the fourth quarter, which we previously provided with our third quarter earnings release, only modestly impacting our results in comparison to our 2018 outlook that we provided last quarter. They were much more of a headwind on year-ago comparisons, but we still did very well. Same-tower recurring cash leasing revenue growth for the fourth quarter, which is calculated on a constant currency basis, was 6% over the fourth quarter of 2017, including the impact of 2.1% of churn. On a gross basis, same-tower growth was 8.1%. Domestic same-tower recurring cash leasing revenue growth over the fourth quarter of last year was 7.4% on a gross basis, and 5.1% on a net basis, including 2.3% of churn, over half of which was related to Metro/Leap, Clearwire and iDEN termination. Domestic same-tower recurring cash leasing revenue growth on a gross basis increased to its highest point in over two years, reflecting our strong 2018 operational domestic leasing activity. Domestic operational leasing activity, representing new revenue signed up during the quarter, was very strong in the fourth quarter and once again well above the year-ago levels. During the fourth quarter, we again had solid but varied contributions from each of the Big Four carriers. Newly signed up domestic leasing revenue came about 53% from amendments and 47% from new leases, and the big four carriers represented 84% of total incremental domestic leasing revenue signed up during the quarter. We also had a nice contribution to our domestic operational leasing activity from Dish. We exited the year with a solid domestic backlog, which we expect to provide us with a continued healthy level of new lease and amendment signings as we move into 2019, and earlier activity has been consistent with that. Internationally, on a constant currency basis, same-tower cash leasing revenue growth was 10.3%, including 1% of churn or 11.3% on a gross basis. International churn consisted almost entirely of one non-big four customer in Brazil and one minor tenant in Nicaragua. Gross same-tower organic growth in Brazil was 12.7% on a constant currency basis, resulting from strong operational leasing activity in Brazil over the last 12 months. Across our international markets, as a whole, we had another strong leasing quarter, with Brazil again providing the biggest contribution. In Brazil, we had solid contributions from Claro, Vivo, Oi and TIM. During the fourth quarter, 86.3% of consolidated cash site leasing revenue was denominated in U.S. dollars. The majority of non-U.S. dollar-denominated revenue was from Brazil, with Brazil representing 12.1% of all cash site leasing revenues during the quarter, and 8.8% of cash site leasing revenue, excluding revenues from pass-through expenses. With regard to fourth quarter churn, we continue to see churn from leases with Metro, Leap and Clearwire consistent with our expectations. As of year-end, we have approximately $11 million of annual recurring run rate revenue from leases with Metro, Leap and Clearwire that we ultimately expect to churn off over the next two years. Also, in the fourth quarter, we incurred approximately $6 million of annualized churn from certain legacy iDEN-related leases. Because the iDEN churn occurred late in the year, it will have a greater impact on our 2019 results than our 2018 results. The formal exploration of these leases had been anticipated within our full year 2018 outlook, and it is incorporated into our full year 2019 outlook. Domestic churn in the fourth quarter from all other tenants on an annual same-tower basis was 1.1%, most of which relates to narrowband technologies and vestiges of individually immaterial carrier consolidation. Tower cash flow for the fourth quarter was $354.1 million. Our industry-leading domestic tower cash flow margin increased to 82.9% in the quarter. International tower cash flow margin increased to 68.8% and was 89.5%, excluding the impact of pass-through reimbursable expenses. Adjusted EBITDA in the fourth quarter was $339.3 million. Our adjusted EBITDA results in the quarter were again driven by strong performances in both our leasing and services businesses. Services revenues in the fourth quarter were $39.1 million, up 34.9% over the fourth quarter of 2017, driving over twice as much services gross profit as the year-ago period. Our adjusted EBITDA margin was 70.5% in the quarter compared to 70.6% in the year-earlier period. Excluding the impact of revenues from pass-through expenses, adjusted EBITDA margin was 75.1%. Approximately 97% of our total adjusted EBITDA was attributable to our tower leasing business in the fourth quarter. AFFO in the fourth quarter was $229.9 million. AFFO per share was $2, an increase of 12.4% over the fourth quarter of 2017 or 15.2% on a constant currency basis. During the fourth quarter, we continue to invest in expanding our tower portfolio, acquiring 79 communication sites for $28.5 million and building 169 sites. Most of the added sites were located internationally. Subsequent to quarter-end, we have acquired 27 additional communication sites for $10.7 million. And as of today, we have 264 total additional sites under contract for acquisition at an aggregate price of $78.1 million. We also continued to invest in the land under our sites, which provides both strategic and financial benefits. During the quarter, we spent an aggregate of $21.5 million to buy land and easements and to extend ground lease terms. At the end of the year, we owned or controlled for more than 20 years the land underneath approximately 71% of our towers, and the average remaining life under our ground leases, including renewal options under our control, is approximately 36 years. Beyond portfolio investments, we also invested in significant share repurchases during the quarter. During the fourth quarter, we spent $342 million to repurchase 2.2 million shares at an average price of $158.09 per share. Our total 2018 share repurchases were $795.5 million shares or five million shares, representing an average price of $159.87 per share. Share repurchases remain an important contributor to our efforts to continually grow AFFO per share. Looking ahead now, our earnings press release includes our initial outlook for full year 2019. Our outlook reflects another year of solid growth in our leasing business. Our anticipated outlook for 2019 leasing revenue is built upon a strong operational leasing activity we saw throughout 2018, but particularly in the second half of the year. We also anticipate continued healthy levels of domestic operational leasing activity in 2019, based largely on current application backlogs. We have also assumed an increase in year-over-year domestic churn levels, driven partially by the full year impact of the fourth quarter 2018 iDEN churn I mentioned earlier as well as an assumed return to our historical range of normal churn of between 1% and 1.5%. With regards to the potential Sprint/T-Mobile merger, we do not have any specific knowledge regarding the likelihood of the merger receiving regulatory approval. However, we have assumed, for purposes of our 2019 services guidance, that the transaction does get approved, and we see a stop to all activity with Sprint starting this summer. We would not anticipate the outcome of the merger approval process to meaningfully impact our 2019 leasing outlook. In our international business, our outlook anticipates continued steady organic leasing contributions. We have incorporated consensus estimates of a slight weakening in the Brazilian foreign exchange rate from where we are today, assuming a consistent FX rate during 2019 of R$3.80 to US$1. Effective January 1, 2019, SBA will be adopting the new lease accounting standard. This accounting standard requires lessees to now recognize a lease liability and offsetting right-of-use assets on their balance sheet. As a result, beginning in 2019, we anticipate recording a new lease liability on our balance sheet of approximately $2.5 billion related to our existing ground lease obligations. There will be a corresponding right-of-use asset recorded on our balance sheet as well. We do not expect this new accounting to have any material impact on our income statement, our reported adjusted EBITDA, our AFFO, our liquidity, our ratings or our debt covenant compliance. However, the adoption of this new standard will require a change in the treatment of tenant lease origination costs, which will result in a reduction to cost of site leasing revenue and an increase to selling, general and administrative expense. As such, our reported tower cash flow as well as our reported SG&A will each be higher in 2019 than they would have been without the impact of the new standard by about $9 million. The impact of this change has been incorporated into our 2019 full year outlook for tower cash flow. Our full year 2019 outlook does not assume any further acquisitions beyond those under contract today, and it does not assume any share repurchases at all. We’ve assumed one new financing during the third quarter of 2019 at an interest rate of 4.25% to refinance our maturing 2014-1C securitization notes. For our floating rate debt, we have assumed a one-month LIBOR rate of 2.60% throughout the year, as well as including the impact of our recently entered into interest rate swap, which Mark will discuss further in a moment. We estimate an increase in our cash taxes of approximately $4 million to $5 million at the midpoint, mostly related to state taxes where we do not have any NOLs and increases in international taxes. Finally, our outlook for AFFO per share is based on an assumed weighted average number of diluted common shares of 114.4 million, which assumption is influenced in part by estimated future share prices. We are excited and optimistic about 2019, and we see great opportunities for SBA throughout the year ahead. I will now turn things over to Mark, who will provide an update on our liquidity position and balance sheet.