AltaGas Ltd. ('AltaGas') (TSX: ALA) today announced that it has agreed to issue $500 million of senior unsecured medium term notes (the '7.5 Year Notes') with a coupon rate of 2.075 percent, maturing on May 30, 2028 and $200 million of senior unsecured medium term notes (the '10 Year Notes') with a coupon rate of 2.477 percent, maturing on November 30, 2030 (the 'Offering').

The Offering is expected to close on or about November 30, 2020. The net proceeds resulting from the Offering will be used to pay down existing indebtedness under AltaGas' credit facility, to fund the redemption of all of the issued and outstanding Cumulative Redeemable 5-Year Minimum Rate Reset Preferred Shares, Series I of AltaGas and for general corporate purposes.

The Offering is being made through a syndicate of investment dealers jointly led by CIBC Capital Markets, BMO Capital Markets and National Bank Financial Inc. under AltaGas' Short Form Base Shelf Prospectus dated September 25, 2019, Prospectus Supplement dated December 10, 2019 and related Pricing Supplements dated November 25, 2020.

ABOUT ALTAGAS

AltaGas is a leading North American energy infrastructure company that connects NGLs and natural gas to domestic and global markets. The Company operates a diversified, low-risk, high-growth Utilities and Midstream business that is focused on delivering resilient and durable value for its stakeholders.

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Tel: 1-877-691-7199

FORWARD-LOOKING INFORMATION

This news release contains forward-looking statements. When used in this news release, the words 'may', 'would', 'could', 'will', 'intend', 'plan', 'anticipate', 'believe', 'seek', 'propose', 'estimate', 'expect', and similar expressions, as they relate to AltaGas are intended to identify forward-looking statements. In particular, this news release contains forward-looking statements with respect to, among other things, the Offering, the closing of the Offering and the use of proceeds from the Offering. These statements involve known and unknown risks, uncertainties and other factors that may cause actual results or events to differ materially from those anticipated in such forward-looking statements. Such statements reflect AltaGas' current views with respect to future events based on certain material factors and assumptions and are subject to certain risks and uncertainties, including without limitation, changes in market, governmental or regulatory developments, general economic conditions and other factors set out in AltaGas' public disclosure documents. Many factors could cause AltaGas' actual results, performance or achievements to vary from those described in this news release, including without limitation those listed above. These factors should not be construed as exhaustive. Should one or more of these risks or uncertainties materialize, or should assumptions underlying forward-looking statements prove incorrect, actual results may vary materially from those described in this news release as intended, planned, anticipated, believed, sought, proposed, estimated or expected, and such forward-looking statements included in, or incorporated by reference in this news release, should not be unduly relied upon. Such statements speak only as of the date of this news release. AltaGas does not intend, and does not assume any obligation, to update these forward-looking statements. The forward-looking statements contained in this news release are expressly qualified by this cautionary statement.