AltaGas to Issue Third Quarter 2025 Results

CALGARY, AB, Oct. 9, 2025  – AltaGas Ltd. (“AltaGas” or the “Company”) (TSX: ALA) will release its third quarter 2025 results on Thursday, October 30, 2025, before market open. A conference call and webcast will be held the same day to discuss the financial results and other corporate developments.

Conference Call and Webcast Details:

Date:                           Thursday, October 30, 2025
Time:                           9:00 a.m. MT (11:00 a.m. ET)
Webcast:                     https://app.webinar.net/9mVlzn0k8nN
Dial-in (Audio only):    +1 437 900 0527 or toll free at +1 888 510 2154

Shortly after the conclusion of the call a replay will be available on the Company’s website or by dialing +1 289 819 1450 or toll free +1 888 660 6345. Passcode 60892 #.

ABOUT ALTAGAS

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 energy infrastructure business that is focused on delivering stable and growing value for its stakeholders.

For more information visit www.altagas.ca or reach out to one of the following:

Investor Inquiries 1-877-691-7199 investor.relations@altagas.ca

Media Inquiries 1-403-206-2841 media.relations@altagas.ca

NT4