Compounding Long-term Dividends at 5-7% CAGR

Premiere, Globally Connected Midstream Platform Robust long-term fundamentals, supported by West Coast LNG Industry-leading Montney footprint - positioned to attract volumes and value chain opportunities Visible near and long-term growth De-risking commercial framework Strong counter-party credit: ~80% investment grade customers and growing take-or-pay or fee-for-service (currently ~50%) 2024E Normalized EBITDA 1,3 Credit Quality 20% 27% A- and Above 53% BBB+ to BBB- ■BB+ to BB- 36% RIPET Prince Rupert Blair Creek Montney Region Townsend North Pine Fort St. John Younger Gordondale Pipestone 1/11 Dimsdale (Pipestone Gas Storage) Duvernay Region + Pipestone Dimi (Pipe Gas Pipestone I/II Announced Pipestone Acquisition Fort Saskatchewan Contract Type² Edmonton EEEP 10% Deep Basin JEEP 35% ■Take-or-Pay & 1 Harmattan Cost-of-Service Ferndale Empress Fee-for-Service ■Differential Commodity Bakken Region 19% AltaGas Midstream NGL Fractionation Gas Processing Processing and Fractionation LPG Export Terminal Storage Facility 6 Truck Terminal Rail Transport HH Rail Pipestone Assets Gas Processing Storage Facility Notes: 1) Non-GAAP financial measure; see discussion in the advisories.; 2) Differential: Merchant unhedged Global Export and other marketing volumes; Commodity: Frac exposed volumes, hedged and unhedged.; 3) Totals may not add due to rounding; *See "Forward-looking Information". AltaGas Globally Connected Infrastructure 45

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