VERTEX UNMANNED SOLUTIONS LLC

period resulted in anti-dilutive impact to EPS. ​ ​ ​ 13 . EMPLOYEE BENEFIT AND DEFERRED COMPENSATION PLANS The Company maintains a 401(k) plan that covers eligible employees. The Company matches up to 6 % of eligible compensation during the period in which an eligible participant contributes to the plan. Matching 401(k) contributions were $ 14,713 , $ 12,641 , and $ 11,285 for the years ended December 31, 2025, 2024, and 2023, respectively. F-42 Table of Contents Vertex, Inc. and Subsidiaries Notes to Consolidated Financial Statements (continued) (Amounts in thousands, except per share data) Stock-Based Award Plans The 2020 Incentive Award Plan (the “2020 Plan”) provides the ability to grant cash and equity-based incentive awards to eligible employees, directors and service providers in o

xpense is recognized and any previously recognized compensation expense is reversed. As of December 31, 2025, the first-year target was achieved, and the corresponding PSUs became fully vested. Additionally, the Company determined that it was probable that the performance targets for the annual measurement periods would be achieved at varying levels across the second and third-year measurement periods. ​ The following table summarizes PSU activity for the year ended December 31, 2025: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Average ​ ​ ​ ​ Grant Date Fair ​ ​ Units ​ Value Per Share Outstanding at January 1, 2025 ​ 192 ​ $ 53.46 Granted ​ 30 ​ ​ 34.56 Vested ​ ( 71 ) ​ ​ 50.86 Forfeited ​ ( 10 ) ​ ​ 51.17 Outstanding at December 31, 2025 ​ 141 ​ $ 50.86 ​ At December 31, 2025, a maximum of $ 5,941 of unreco

se investments will occur in advance of experiencing the benefits from such investments and may vary in scope and scale over future periods. General and Administrative General and administrative expenses consist primarily of personnel and related expenses for administrative, finance, information technology, legal, risk management, facilities, and human resources staffing, including salaries, benefits, bonuses, severance, stock-based compensation, professional fees, insurance premiums, facility costs, amortization of cloud computing arrangement implementation costs, and other internal support and infrastructure costs. We expect our general and administrative expenses to increase in absolute dollars as we continue to expand our operations, hire additional personnel, and integrate current and