Thanks, Mark. We're very encouraged by the strong fourth quarter, exceeding the high end of the range on every metric we guided to for the quarter and the year. It was an outstanding finish to the year, and I'm so proud of the entire team for their execution. Revenue for the quarter was $260.5 million, representing growth of 10.5% year-over-year and driving growth of 11% year-over-year on a full-year basis. The year-over-year growth in revenue for the quarter, as well as outperformance relative to guidance, was underpinned by a solid foundation of renewal business and an increase in our new and expansion growth rates driven by Tenable One adoption. Our percentage of recurring revenue remained high at 96% for the year. We're continuing to see increasing momentum in Tenable One, with an all-time high of 46% of new and expansion business coming from the platform. As preemptive security takes center stage, customers are turning to our platform as their solution of choice to manage risk across their attack surface, including AI. We added 502 new customers in the quarter, many of which came directly into Tenable One. The strength in Tenable One drove calculated current billings or CCB ahead of expectations to $327.8 million in the fourth quarter, a year-over-year increase of 8.5%. Full-year 2025 CCB landed at $1.049 billion, growing 8.2% year-over-year, while short-term remaining purchase obligations or CRPO grew 13.3%. Changes in upfront billing patterns and increasing contract durations are causing the growth rates in CCB and CRPO to diverge, which we expect to persist in the midterm. Net dollar expansion rate came in ahead of expectations at 106%. Non-GAAP gross margin was 82.7% for the quarter, an increase from 81.7% in Q4 2024. Full-year 2025 non-GAAP gross margin was 82.1%, compared to 81.4% in the prior year. We are encouraged by our ability to slowly but steadily increase non-GAAP gross margin year-over-year, both on a quarter and full-year basis. Non-GAAP income from operations for the quarter was $63.7 million or 24.4% of revenue. On a full-year basis, non-GAAP income from operations grew to $219 million or 21.9% of revenue, compared to $184.1 million or 20.5% of revenue in the prior year. I'm especially proud of our ability to steadily increase margins in 2025, growing operating margin 140 basis points compared to 2024, in a year in which we absorbed two acquisitions and invested significantly in product innovation, as demonstrated by the year-over-year increase in research and development expenses. We expect to continue our strong track record of delivering margin expansion while balancing for growth, having expanded our non-GAAP operating margin by 680 basis points since 2023. Non-GAAP earnings per share for the quarter was $0.48 compared to $0.41 in Q4 2024, an increase of 17.1%. Non-GAAP earnings per share for the year was $1.59 compared to $1.29 in 2024, an increase of 23.3%. The increase in Q4 and full-year EPS reflects the increase in profitability combined with a decrease in diluted shares outstanding. Turning to the balance sheet, cash and short-term investments totaled $402.2 million. We generated $87.5 million in unlevered free cash flow during the quarter, compared to $85.7 million in Q4 2024, bringing our full-year 2025 unlevered free cash flow to $277 million, a year-over-year increase of 16.5%, and now represents 27.7% of revenue. During the fourth quarter, we repurchased 2.3 million shares for $62.5 million, and through 2025, we have repurchased a total of 10.6 million shares for $362.4 million since November 2023. Today, I'm happy to announce that we recommended and the board approved a $150 million increase to our share repurchase authorization, increasing our current total to $338 million as of year-end, and enabling us to accelerate repurchases under the program. We believe that our current share price trades at a discount relative to our true value, and that utilizing our strong balance sheet and cash flow generation to more aggressively repurchase shares is an effective use of capital. Turning to the financial outlook for Q1 and full-year 2026, we have discussed over the past several quarters that CCB and RPO growth rates are diverging due to changes in upfront billings patterns and increasing contract durations. The increasing mix of larger strategic multiyear transactions is a desired outcome of our platform strategy and is driving an increase in overall contract duration. At the same time, the shift to annual installment billings based on customer demand and away from 100% upfront payments on multiyear transactions is reducing overall billing durations compared to prior periods and causing a negative distortion to CCB that we believe fails to accurately represent the growth of our business. In addition to the distortion dynamic that impacts what we disclose externally, internally, management is no longer using CCB as a component to monitor the performance of the business. Consequently, TCV is no longer a key financial metric for us, and we will not be providing a specific guidance range for CCB in 2026 and forward. Having said that, while we will not guide to a specific CCB range in 2026, we expect full-year 2026 CCB will be in line with current consensus expectations despite the anticipated billings duration headwinds. The momentum we experienced in Tenable One in 2025 and the growing opportunity in AI exposure gives us confidence heading into 2026. For Q1, we expect revenue to be in the range of $257 million to $260 million, representing a year-over-year increase of 8.1% at the midpoint. For full-year 2026, we expect revenue to be in the range of $1.065 billion to $1.075 billion, exceeding the $1 billion milestone for the first time and representing a year-over-year increase of 7.1% at the midpoint. We expect non-GAAP income from operations for the first quarter to be in the range of $53 million to $56 million or 21.1% of revenue at the midpoint. For full-year 2026, we expect non-GAAP operating income to be in the range of $245 million to $255 million or 23.4% of revenue at the midpoint, representing a year-over-year increase of 150 basis points. At the end of Q4, we began an effort to realign departments across the company, stripping out redundant roles and reinvesting into innovation in the Tenable One platform and AI security. As a result of these efforts, we incurred $3.1 million of restructuring expenses in Q4 and expect to incur approximately $5 million more in the first half of the year, all of which is expected to be paid in 2026. We expect non-GAAP net income for the first quarter to be in the range of $46 million to $49 million, representing a year-over-year increase of 7.2% at the midpoint. For full-year 2026, we expect non-GAAP net income in the range of $214 million to $224 million, representing a year-over-year increase of 12.7% at the midpoint. We expect non-GAAP earnings per share for the first quarter to be in the range of $0.39 to $0.42 per share, representing a year-over-year increase of 12.5% at the midpoint. For full-year 2026, we expect non-GAAP earnings per share in the range of $1.81 to $1.90 per share, representing a year-over-year increase of 16.7% at the midpoint. And finally, we expect unlevered free cash flow for the year to be in the range of $285 million to $295 million or 27.1% of revenue at the midpoint. While we're pleased unlevered free cash flow continues to grow year-over-year, it's worth noting that our 2026 forecast is being impacted by an estimated $24 million or approximately 220 basis points of margin due to the reduction in upfront multiyear billings and cash restructuring charges that I spoke about before. Looking ahead to 2027 and beyond, we expect billings durations to normalize, and unlevered free cash flow as a percentage of revenue will grow generally in line with growth in non-GAAP operating margin. In closing, we'd like to thank the entire Tenable Holdings, Inc. team and our customers and partners for a great result. It's amazing to see the traction we're getting in Tenable One and our customers' excitement around our AI exposure management capabilities. We believe that 2025 was important validation and that 2026 is setting the foundation for returning to accelerating growth, which is our number one priority. With that, we are happy to open up the call for questions. Operator?