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$QQXDO5HSRUW 7RP\IHOORZVKDUHKROGHUV $VZHHQWHUȴVFDO\HDUΖZDQWWRWKDQNRXUHPSOR\HHVIRUWKHLUGHGLFDWLRQRXUFXVWRPHUVDQGSDUWQHUVIRUWKHLUWUXVWDQG\RXRXUVKDUHKROGHUVIRU\RXUFRQWLQXHGVXSSRUW Fiscal 2026 Performance )LVFDOZDVDVWURQJ\HDUIRU1(76&287:HUHWXUQHGWKHEXVLQHVVWRUHYHQXHJURZWKLPSURYHGPDUJLQVLQFUHDVHGHDUQLQJVDQGFRQWLQXHGWRLQYHVWLQLQQRYDWLRQZKLOHKHOSLQJRXUFXVWRPHUVQDYLJDWHDGLJLWDOHQYLURQPHQWWKDWLVLQFUHDVLQJO\FRPSOH[DQGFULWLFDOWRWKHLURSHUDWLRQV)RUȴVFDO\HDURXUUHYHQXHLQFUHDVHGSHUFHQWWRDSSUR[LPDWHO\PLOOLRQ:HH[SDQGHGJURVVDQGRSHUDWLQJPDUJLQVGHOLYHUHGQHDUO\SHUFHQWJURZWKLQQRQ*$$3GLOXWHGHDUQLQJVSHUVKDUHWRDQGJHQHUDWHGQHDUUHFRUGIUHHFDVKȵRZRIPRUHWKDQPLOOLRQ:HHQGHGWKH\HDUZLWKPLOOLRQLQFDVKFDVKHTXLYDOHQWVDQGPDUNHWDEOHVHFXULWLHVDQGQRGHEWJLYLQJXVPHDQLQJIXOȵH[LELOLW\WRLQYHVWLQWKHEXVLQHVVDQGUHWXUQFDSLWDOWRVKDUHKROGHUV Technology, Products, and Market Opportunity 7KHVHUHVXOWVGHPRQVWUDWHWKHSRZHURIRXUEXVLQHVVPRGHOWKHGXUDELOLW\RIRXUWHFKQRORJ\DQGWKHUHOHYDQFHRIRXUVROXWLRQVDFURVVDEURDGSRUWIROLRWKDWFRQWLQXHVWRHYROYHZLWKRXUFXVWRPHUVȇQHHGV$FURVVERWK6HUYLFH$VVXUDQFHDQG&\EHUVHFXULW\ZHDGYDQFHGGL΍HUHQWLDWHGFDSDELOLWLHVWKDWEXLOGRQ1(76&287ȇVORQJVWDQGLQJVWUHQJWKVLQGHHSSDFNHWLQVSHFWLRQVPDUWGDWDDQDO\WLFVDQGUHDOWLPHYLVLELOLW\ 2XU&\EHUVHFXULW\EXVLQHVVUHPDLQHGDQLPSRUWDQWJURZWKGULYHULQȴVFDO\HDUZLWKUHYHQXHLQFUHDVLQJDSSUR[LPDWHO\SHUFHQWDQGFRQWULEXWLRQVDFURVVHQWHUSULVHDQGVHUYLFHSURYLGHUFXVWRPHUV&XVWRPHUVUHO\RQ1(76&287WRKHOSSURWHFWWKHLUFULWLFDOGLJLWDOLQIUDVWUXFWXUHIURPWKUHDWDFWRUVWKDWDUHPRUHVRSKLVWLFDWHGWKDQHYHU'XULQJWKH\HDUZHHQKDQFHGRXUR΍HULQJVDFURVV$GDSWLYH''R6'LVWULEXWHG7KUHDW0LWLJDWLRQ$UERU(GJH'HIHQVH$WODV7KUHDWΖQWHOOLJHQFH$UERU&ORXGPRELOHVHFXULW\DQGDGYDQFHGWKUHDWDQDO\WLFV :HDOVRVWUHQJWKHQHGRXUFORXG''R6FDSDELOLWLHVWKURXJKWKHUHFHQWDFTXLVLWLRQRI'LJL&HUWΖQFȇV''R6SURWHFWLRQEXVLQHVVDVVHWV%ULQJLQJWKHEDFNHQGLQIUDVWUXFWXUHRIRXU$UERU&ORXGQHWZRUNIXOO\LQKRXVHJLYHVXVJUHDWHUFRQWURORYHUWKHSODWIRUPVXSSRUWVRXUDELOLW\WRVFDOHFORXGEDVHGVHUYLFHVDQGDGGVLQFUHPHQWDOUHFXUULQJUHYHQXHLQDWUDQVDFWLRQWKDWZDVLPPHGLDWHO\DFFUHWLYH 2XU6HUYLFH$VVXUDQFHEXVLQHVVDOVRPDGHLPSRUWDQWSURJUHVVGXULQJWKH\HDUZLWKUHYHQXHLQFUHDVLQJDSSUR[LPDWHO\SHUFHQWVXSSRUWHGE\HQWHUSULVHGHPDQGLQFOXGLQJJRYHUQPHQWUHODWHGVSHQGLQJ2XUQ*HQLXVDQGΖQȴQL6WUHDPVROXWLRQVRXU(GJHYLVLELOLW\FDSDELOLWLHVDQGRXU6PDUW'DWDDQGGHHSSDFNHWLQVSHFWLRQWHFKQRORJLHVFRQWLQXHWRKHOSFXVWRPHUVVHHXQGHUVWDQGDQGPDQDJHFRPSOH[HQYLURQPHQWVDFURVVRQSUHPLVHVK\EULGFORXGDQGHGJHQHWZRUNV Today, as organizations look to automate more tasks, reduce risk and costs, and manage complexdigital environments, they need enhanced network visibility and better data for immediate insight,which plays directly to NETSCOUT’s strengths. NETSCOUT has long been recognized for its packet-based approach to network detection, investigation, and response. We are proud to have recentlyearned our 750th patent, a milestone that reflects our 40-plus year commitment to customers,innovation, and the differentiation of our technology. Our patented deep packet inspection andmetadata aggregation capabilities enable us to generate compact, highfidelity, AI-ready smartdata at scale, giving customers the ability to bring NETSCOUT data and insight into their broaderobservability and AI efforts. That is what being a Guardian of the Connected World looks like. In Service Assurance, solutions such as our Omnis Sensor and Omnis Streamer transform high-fidelity network packet data into actionable intelligence and enable efficient integration with multi-vendor AI solutions. In Cybersecurity, AI and machine learning help strengthen protection againstincreasingly automated and AI-enabled attacks, with customers requiring trusted, real-time visibilityand intelligent protection as their network environments grow more complex. Outlook and Priorities We are enteringfiscal year 2027 with momentum and a clear focus, while remaining mindful of thebroader macro environment. We expect to build on ourfiscal year 2026 success by advancing ourrevenue growth, further improving profitability, and continuing to generate strong free cashflow.Our priorities remain straightforward: support customers with mission-critical solutions, invest ininnovation, build on our momentum in Cybersecurity and enterprise-led Service Assurance, andmanage the business withfinancial discipline. In closing, I remain confident in our strategy, proud of what we accomplished infiscal year 2026, andexcited about the opportunities ahead. Sincerely, Anil SinghalCo-Founder, Chief Executive Officer, and Chairman of the Board Reconciliation of GAAP to Non-GAAP Financial Measures 2026 Annual Reporton Form 10-K UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549FORM 10-K (Mark One)ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 ☒ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period