Press release dated October 1, 2026

TCS/SE/96/2026-27 October 1, 2026 National Stock Exchange of India Limited BSE Limited Exchange Plaza, P. J. Towers, Bandra Kurla Complex, Dalal Street, Mumbai-400051 Mumbai-400001 Symbol: TCS Scrip Code No. 532540 Dear Sirs, Sub: Press Release We are sending herewith copy of the Press Release titled “Best Buy’s Global Capability Center in India to transition to TCS” which will be disseminated shortly. The Press release is self-explanatory. Thanking you, Yours faithfully, For Tata Consultancy Services Limited Yashaswin Sheth Company Secretary ACS 15388 Encl: as above 9th Floor Nirmal Building Nariman Point Mumbai 400 021 Tel 91 22 6778 9595 Fax 91 22 6630 3672 e-mail corporate.office@tcs.com website www.tcs.com Registered Office 9th Floor Nirmal Building Nariman Point Mumbai 400 021 Corporate Identity No. (CIN): L22210MH1995PLC084781 Best Buy’s Global Capability Center in India to transition to TCS The strategic deal will bring Best Buy™ India capabilities into TCS, creating an AI-centered technology and innovation hub grounded in deep retail expertise MINNEAPOLIS | MUMBAI, October 1, 2026: Tata Consultancy Services (TCS) (BSE: 532540, NSE: TCS) and Best Buy (NYSE: BBY) today announced an agreement to transition Best Buy’s Global Capability Center (GCC) in India to TCS. The agreement will combine the GCC’s deep retail and enterprise knowledge with TCS’s technology, engineering, AI and global delivery capabilities to accelerate innovation, scale AI- powered solutions and deliver greater business value. As part of the agreement, the Best Buy™ India entity will transition to TCS, ensuring business continuity; while embarking on its transformation into an AI-native Capability Center (AICC) under a multi-year agreement. Leveraging TCS’ Global Value & Innovation Centres framework, teams will redesign workflows, develop AI-powered experiences and solutions, and scale capabilities across the business, transitioning into an AI Capability Center over time. Krishnan Ramanujam, President, Consumer Business Group, TCS, said, “Best Buy has built a strong technology organization with deep knowledge of its customers and business. By bringing that talent together with TCS’ retail expertise, AI, engineering and global execution capabilities, we will create an AI- native capability engine that aligns Best Buy’s priorities. This partnership will also create a repeatable value platform that can potentially benefit the broader retail industry.” Ahrey Smith, Vice President of Technology Strategy and Transformation, Best Buy, said “Our India team has played an important role in advancing Best Buy’s priorities, and we wanted a partner that understood both the business context and the value of this team. TCS brings that understanding, along with the technology and AI capabilities to build on the team’s strengths and meaningful opportunities for employees to continue learning and growing in their careers.” TCS will welcome Best Buy India employees into its global organization, preserving the deep business and technology knowledge to advance Best Buy priorities while opening access to TCS’ global learning and innovation ecosystem, AI skills and global opportunities. The partnership also demonstrates TCS’ end-to- end GCC capabilities, from building and scaling capability centers to transforming them into AI-led engines of innovation and enterprise value. About Tata Consultancy Services Ltd (TCS) Tata Consultancy Services (BSE: 532540, NSE: TCS) is a preferred technology partner for industry-leading organizations worldwide. Since its founding in 1968, TCS has maintained the highest standards of innovation, engineering excellence, and customer service. Its goal is to become the world's largest AI-powered technology services company, enabling customers to transform across the entire AI value chain, from infrastructure to intelligence. Rooted in the Tata Group's long-standing tradition, TCS is focused on creating long-term value for its clients, investors, employees, and the communities it serves. With a highly skilled workforce operating across 56 countries and 194 service delivery centers worldwide, the company has been recognized as one of the best places to work across six continents. By rapidly applying and scaling emerging technologies, TCS has built long-term partnerships with customers, helping them become perpetually adaptive enterprises. TCS sponsors 14 of the world's most prestigious marathons and endurance events, including the TCS New York City Marathon, the TCS London Marathon, the Tata Mumbai Marathon, and the TCS Sydney Marathon, with a focus on promoting health, sustainability, and stronger communities. TCS generated consolidated revenues of over US$30 billion for the fiscal year ended March 31, 2026. For more information, visit www.tcs.com Follow TCS on LinkedIn| Instagram | YouTube| X TCS Media Contacts: Email: corporate.communications@tcs.com Email: santosh.castelino@tcs.com | Phone: Corporate Communication & India +91 22 6778 9999 Email: rhea.mistry@tcs.com | Phone: +91 22 6778 9999 Email: andrew.corcione@tcs.com | Phone: +1 646 617 8221