CALGARY, AB, Nov. 20, 2020 /CNW/ – AltaGas Ltd. (“AltaGas” or the “Company”) (TSX: ALA)announces its intention to redeem – in accordance with the terms of the Cumulative Redeemable 5-YearMinimum Rate Reset Preferred Shares, Series I (the “Series I Shares”) as set out in the Company’s articles –all of its 8,000,000 issued and outstanding Series I Shares on December 31, 2020 (the “Redemption Date”)for a redemption price equal to $25.00 per Series I Share, together with all accrued and unpaid dividends to,but excluding, the Redemption Date (the “Redemption Price”), less any tax required to be deducted orwithheld by the Company

The Company has provided notice today of the Redemption Price and the Redemption Date to the soleregistered holder of the Series I Shares in accordance with the terms of the Series I Shares as set out in theCompany’s articles. Non-registered holders of Series I Shares should contact their broker or otherintermediary for information regarding the redemption process for the Series I Shares in which they hold abeneficial interest. The Company’s transfer agent for the Series I Shares is Computershare Investor ServicesInc. Questions regarding the redemption process may be directed to Computershare Investor Services Inc. at1-800-564-6253 or by email to corporateactions@computershare.com