Tenaga Nasional Bhd (TNB) generates, transmits, and distributes electricity. It develops, operates, and maintains a portfolio of power-generating units. The company produces electricity using crude oil, natural gas, hydro, coal, and gas sources. It has operating assets in the UK, Kuwait, Turkiye, and Saudi Arabia.

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TNB allocates resources to research and development and digital innovation to advance decarbonization and operational performance. The company invests in R&D technology solutions and services, with a focus on long-term capability building, strengthening technological positioning, and supporting value creation across the energy ecosystem. In FY2025, the company spent MYR85.7 million on R&D, which as a percentage of revenue, stood at 0.1%.