An anonymous director reports

MEDIA ADVISORY: TRANSALTA AND TRANSALTA RENEWABLES ANNUAL MEETINGS OF SHAREHOLDERS AND FIRST QUARTER 2023 RESULTS AND CONFERENCE CALL

TransAlta Corp. and TransAlta Renewables Inc. have scheduled their annual meetings of shareholders and first quarter 2023 results and conference call.

2023 annual meeting of TransAlta shareholders

On Friday, April 28, 2023, TransAlta will hold its annual meeting of shareholders at 12:30 p.m. MT (2:30 p.m. ET) in a virtual-only meeting format via live audio webcast. The management proxy circular (available on the TransAlta website) provides detailed information about the business of the meeting and the voting process. TransAlta will only conduct the formal business of the meeting and there will not be a management presentation following the formal business of the meeting.

2023 annual meeting of TransAlta Renewables shareholders

On Thursday, May 4, 2023, TransAlta Renewables will hold its annual meeting of shareholders at 10 a.m. MT (12 p.m. ET) in a virtual-only meeting format via live audio webcast. The management proxy circular (available on the TransAlta Renewables website) provides detailed information about the business of the meeting and the voting process. TransAlta Renewables will only conduct the formal business of the meeting and there will not be a management presentation following the formal business of the meeting.

Q1 2023 earnings release, conference call and webcast

TransAlta and TransAlta Renewables will release their first quarter 2023 results before markets open on Friday, May 5, 2023. A conference call and webcast to discuss the results will be held for investors, analysts, members of the media and other interested parties on the same day beginning at 9 a.m. MT (11 a.m. ET). The media will be invited to ask questions following analysts.

Any questions regarding TransAlta Renewables may be asked on the TransAlta conference call.

First quarter 2023 conference call

Toll-free North American participants:  1-888-664-6392

Webcast:  A webcast will be available.

Related materials will be available on the investor centre section of TransAlta's website. If you are unable to participate in the call, the instant replay is accessible at 1-888-390-0541 (toll-free in Canada and the United States) with TransAlta passcode 337489 followed by the number sign. A transcript of the broadcast will be posted on TransAlta's website once it becomes available.

About TransAlta Corp.

TransAlta owns, operates and develops a diverse fleet of electrical power generation assets in Canada, the U.S. and Australia with a focus on long-term shareholder value. TransAlta provides municipalities, medium-sized and large industries, businesses and utility customers with clean, affordable, energy-efficient and reliable power. Today, TransAlta is one of Canada's largest producers of wind power and Alberta's largest producer of hydroelectric power. For over 111 years, TransAlta has been a responsible operator and a proud member of the communities where it operates and where its employees work and live. TransAlta aligns its corporate goals with the United Nations sustainable development goals and its climate change strategy with CDP (formerly Climate Disclosure Project) and the Task Force on Climate-related Financial Disclosures (TCFD) recommendations. TransAlta has been recognized by CDP with an A minus rating. TransAlta has achieved a 61-per-cent reduction in greenhouse gas (GHG) emissions since 2015.

About TransAlta Renewables Inc.

TransAlta Renewables is among the largest of any publicly traded renewable independent power producers (IPPs) in Canada. Its asset platform and economic interests are diversified in terms of geography, generation and counterparties, and consist of interests in 26 wind facilities, 11 hydroelectric facilities, eight natural gas generation facilities, two solar facilities, one natural gas pipeline and one battery storage project, representing an ownership interest of 2,965 megawatts of owned generating capacity, located in the provinces of British Columbia, Alberta, Ontario, Quebec, New Brunswick, the states of Pennsylvania, New Hampshire, Wyoming, Massachusetts, Michigan, Minnesota, Washington and North Carolina, and the state of Western Australia.