Investor Presentaiton

INFRASTRUCTURE FOR THE FUTURE STRONG BALANCE SHEET & LOW REFINANCING RISKS All figures 100% at 31 Dec 2020 Rating (S&P/ Moody's) Total Debt Facilities Next Maturity Undrawn Debt Drawn Debt Average Interest Rate Amount VPN A- / n/a $475m $4,928m 3.4%(4) $5,403m Avg. Maturity 4.6 years Amount Date $425m August 2021 SAPN A- /n/a $275m $3,322m 4.1%(4) $3,597m 5.9 years $53m June 2022 TransGrid n/a / Baa2(1) $1,264m(2) $6,183m(2) 3.7%(4) $7,447m(2) 5.1 years $287m(3) June 2021 Corporate n/a / Baa1 $360m $40m 2.3% $400m 2.1 years $400m February 2023 Substantial undrawn and committed facilities . ⚫ Investment grade credit ratings; SKI corporate rating currently negative outlook; expect to be Baa2 in 2021 in anticipation of lower regulatory returns over next 5 years • Access to multiple sources of debt . Long-weighted average maturities • Minimal short-term refinancing requirements (1) Relates to the TransGrid Obligor Group (2) Relates to TransGrid Obligor Group and TransGrid Services (3) This amount excludes $313m undrawn debt at 31 December 2020 (4) Average interest rate is calculated based on finance charges (less non-cash credit valuation hedge adjustments) divided by average gross debt in the period Spark Infrastructure | Investor Presentation | February 2021 11

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