Mr. Jon Morrison reports

ALTAGAS ANNOUNCES $500 MILLION MEDIUM TERM NOTE OFFERING

AltaGas Ltd. has agreed to issue $500-million of senior unsecured medium-term notes with a coupon rate of 3.025 per cent, maturing on Nov. 10, 2027.

The offering is expected to close on or about Nov. 10, 2025. The net proceeds resulting from the offering will be used to repay existing indebtedness, including indebtedness under AltaGas's credit facilities, to finance working capital and for general corporate purposes.

The offering is being made through a syndicate of investment dealers co-led by TD Securities Inc. and National Bank Financial Inc. under AltaGas's short form base shelf prospectus dated March 12, 2025, prospectus supplement dated Nov. 6, 2025, and related pricing supplement dated Nov. 6, 2025.

About AltaGas Ltd.

AltaGas is a leading North American infrastructure company that connects customers and markets to affordable and reliable sources of energy. The company operates a diversified, lower-risk, high-growth utilities and mid-stream business that is focused on delivering resilient and durable value for its stakeholders.

We seek Safe Harbor.