Investor Presentaiton

INFRASTRUCTURE FOR THE FUTURE TRANSGRID - GROWTH OPPORTUNITIES (I) From mid-2020 under the National Electricity Rules there is a requirement to progress the regulatory process and preparatory work for actionable ISP projects AEMO ISP 2020 Trans Grid Network Opportunities Modelled Cost Delivery Target (1) 2018-2023 capex allowance $1.2bn N/A Committed QNI Minor Actionable (2)$0.2bn 2021-22 CENTRAL-WEST ORANA ENERGY ZONE Narrabri voltage control I ARMIDALE New capacity to Gunnedah NEW ENGLAND ENERGY ZONE MEDIUM-LARGE QUEENSLAND-NSW INTERCONNECTOR QUEENSLAND-NSW INTERCONNECTOR UPGRADE VNI Minor (3)$0.1bn Backup supply to Broken Hill 2022-23 Busbar upgrades bat Broken Hill Project EnergyConnect (PEC) (4)$2.0bn 2024-25 DUBBO Voltage support in Greater Sydney HumeLink (3)$2.1bn 2025-26 New capacity 7 near Beryl Supply to Macarthur area Central-West Orana REZ Transmission Link $0.7bn 2024-25 Molong-Orange North capacity increase Supply to South-Western Sydney Growth areas VNI West (Kerang Route) (4) (3)$2.4bn 2027-28 Voltage control at Parkes BURONGA New capacity near Orange Total $7.3bn I Capacity increase at Darlington Point O Supply to North-Western Sydney growth area SYDNEY GANNASY POWERING SYDNEY'S FUTURE Preparatory Activities Required DARLINGTON POINT Wagga Wagga North capacity increase HUMELINK ENERGYCONNECT QNI Medium & Large $3.3bn New England REZ Network Expansion (5)$1.3bn 2032-33 to 2035-36 2030s DINAWAN WAGGA WAGGA CANBERRA Voltage support in the ACT Wagga-Yass transfer capacity increase SOUTH-WEST ENERGY ZONE TUMUT Upper Tumut-Yass transfer capacity increase North West NSW Network Expansion (6)$0.9bn 2030s Jindera-Wagga transfer capacity increase VICTORIA-NSW INTERCONNECTOR UPGRADE Total $5.4bn VICTORIA-NSW INTERCONNECTOR WEST Total ISP Modelled Projects $12.9bn NSW Map Source: Trans Grid, Transmission Annual Planning Report 2020 (1) AEMO 2020 ISP (2) Contingent Project Application (CPA) Approved 28 April 2020 (3) RIT-T process underway (6) Includes combined costs for Stage 1,2 & 3 Spark Infrastructure I Investor Presentation | February 2021 (4) CPA process commenced 9 October 2020. (5) Includes combined costs for Stage 1 & 2 29

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