CALGARY - TransAlta Corporation ('TransAlta' or the 'Company') (TSX: TA) (NYSE: TAC) today reported its financial results for the first quarter ended March 31, 2022.

'TransAlta delivered solid first quarter results for 2022 with contributions from our new contracted assets at Windrise and North Carolina Solar which diversified our portfolio. I am also pleased to confirm that we are on track to deliver our objectives under our Clean Electricity Growth Plan,' said John Kousinioris, President and Chief Executive Officer.

'We delivered growth in renewable energy to new and existing customers in all three core geographies of our operations. We reached final investment decision on our 200 MW Horizon Hill project in Oklahoma by signing a long-term PPA with Meta. We fully contracted our Garden Plain facility by adding another long-term PPA for the remaining 30 MW of capacity with an investment-grade globally recognized customer. And in Western Australia, we reached final investment decision on the Mount Keith transmission expansion project which will enable the connection of additional generating capacity to our network and will support BHP's operations and increase their competitiveness as a supplier of low-carbon nickel.'

Set out below are additional highlights from the quarter on TransAlta's business activities, including the Company's progress on advancing its Clean Electricity Growth Plan as well as details regarding the Company's financial performance and liquidity.

About TransAlta Corporation

TransAlta owns, operates and develops a diverse fleet of electrical power generation assets in Canada, the United States and Australia with a focus on long-term shareholder value. TransAlta provides municipalities, medium 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 100 years, TransAlta has been a responsible operator and a proud community-member where its employees work and live. TransAlta aligns its corporate goals with the UN Sustainable Development Goals.

Cautionary Statement Regarding Forward-Looking Information

This news release contains 'forward-looking information', within the meaning of applicable Canadian securities laws, and 'forward-looking statements', within the meaning of applicable United States securities laws, including the United States Private Securities Litigation Reform Act of 1995 (collectively referred to herein as 'forward-looking statements). In some cases, forward-looking statements can be identified by terminology such as 'plans', 'expects', 'proposed', 'will', 'anticipates', 'develop', 'continue', and similar expressions suggesting future events or future performance. In particular, this news release contains, without limitation, statements pertaining to: the Company's growth projects, including the Horizon Hill wind project, its commercial operation date, estimated construction capital, average annual EBITDA and ability to raise tax equity financing; the White Rock wind projects, including expected commercial operation; the benefits of the EIP investment; the Garden Plain wind project currently under construction; the satisfaction of conditions to the Sarnia cogeneration facility capacity supply commitments with the large industrial customers; the Mount Keith transmission project; including that the project will qualify for a tax benefit, the timing of commercial operation and the annual expected EBITDA; the Kent Hills rehabilitation, including total costs, the timeline to return the turbines to service and ability to enter into commercial arrangements with New Brunswick Power and the terms thereof; the Clean Electricity Growth Plan, including the addition of 2 GW of new renewable capacity with $3 Billion of capital investment and the incremental EBITDA. These forward-looking statements are not historical facts but are based on TransAlta's belief and assumptions based on information available at the time the assumptions were made, including, but not limited to, the current political and regulatory environment, the price of power in Alberta and the condition of the financial markets. These statements are subject to a number of risks and uncertainties that may cause actual results to differ materially from those contemplated by the forward-looking statements. Some of the factors that could cause such differences include: operational risks involving our facilities; inability to satisfy conditions precedent to the capacity supply commitments with the large industrial customers at Sarnia; changes in market prices where we operate; unplanned outages at generating facilities and the capital investments required; equipment failure and our ability to carry out repairs in a cost effective and timely manner; the effects of weather, catastrophes and public health crises; global supply chain disruptions impacting major maintenance and growth projects; disruptions in the source of thermal fuels, water, solar or wind required to operate our facilities, including the necessary natural gas supply; energy trading risks; failure to obtain necessary regulatory approvals in a timely fashion, or at all; inability to satisfy all conditions and requirements associated with announced growth projects; negative impact to our credit ratings; legislative or regulatory developments and their impacts; increasingly stringent environmental requirements and their impacts; increased competition; global capital markets activity (including our ability to access financing at a reasonable cost); changes in prevailing interest rates; currency exchange rates; inflation levels and commodity prices; armed hostilities, including an escalation of the war in Ukraine; general economic conditions in the geographic areas where TransAlta operates; disputes or claims involving TransAlta or TransAlta Renewables and other risks and uncertainties discussed in the Company's materials filed with the securities regulatory authorities from time to time and as also set forth in the Company's MD&A and Annual Information Form for the year ended December 31, 2021. Readers are cautioned not to place undue reliance on these forward-looking statements, which reflect TransAlta's expectations only as of the date of this news release. The purpose of the financial outlooks contained in this news release are to give the reader information about management's current expectations and plans and readers are cautioned that such information may not be appropriate for other purposes and is given as of the date of this news release. TransAlta disclaims any intention or obligation to update or revise these forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Contact:

Tel: 1-800-387-3598

Email: investorrelations@transalta.com

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