Compounding Long-term Dividends at 5-7% CAGR

2 Address Aging Infrastructure Utilities Positioned for Large Ongoing Investment Opportunities 2,000 1,500 D.C. 1,000 500 1 0 2,000 1,500 Maryland 1,000 500 0 2,000 1,500 Michigan 1,000 500 0 2,000 1,500 Virginia 1,000 Notes: *See "Forward- looking Information" AltaGas 500 0 Pre 1940s 1940s 1950s 1960s 1970s 1980s 1990s Iron Plastic Protected Steel Others Large backlog of pipe modernization representing substantial investment opportunities over the long-term 2000s 2010s 2020s AltaGas has a Large Backlog of Pipeline Replacements on the Horizon 36

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