Investor Presentaiton

Washington Gas Regulatory Environment Allowed ROE and Utility Location Regulatory Washington Gas AWGL Company Washington Gas AWGL Company Virginia Equity Thickness Settlement reached based on revenue requirements - not ROE Maryland 9.5% 53.02% Washington Gas AWGL Company Washington D.C. 9.25% 55.7% Rate case was filed in June 2016 with a stipulation issued in April 2017; final Commission approval issued June 30 approving stipulation for $34 million annual revenue increase Expedited rate cases filed in July Rate case filed in May 2018 New 5 year plan for accelerated replacement to be filed in second half of 2018 for the 2019-2024 period Last rate case was filed in February 2016 with final rates approved in March 2017 Rate case to be submitted in 2020 New 5 year plan for accelerated replacement to be filed in 2019 for the 2020 - 2025 period - AltaGas See "forward-looking information" 47

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