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October 2015 308-1868

TransAlta100 years of powering progress

Coal Hydro Gas Wind Solar SunHills

Mine

Corporate Offices (3)

Energy Marketing Offices (4)

Pipeline

Generation Facilities

TransAlta by the numbers

Perth

Australia

Since 1911, TransAlta has supplied the electrical power that makes progress and innovation possible. We take great pride in supplying our customers with clean and affordable electricity, investing in new technologies, providing a positive and safe workplace for employees and investing in communities. We know that the product we offer is vital to the economic success of the regions we serve, and we are pleased to power new possibilities for our customers.

Gary Kutsch, Lead Wind Technician, Soderglen Wind Farm

Massachusetts

1911The year our Horseshoe hydro facility was commissioned. It still runs today.

73,000+Solar panels at our first solar project in Massachusetts – Mass Solar.

1,021Wind turbines operate at our 22 wind farms – the largest wind fleet in Canada.

27,000+Hours volunteered to community initiatives in 2014.

12Natural gas facilities producing power and steam cleanly, reliably and efficiently.

846,000+Tonnes of coal by-product recycled last year.

Our CommitmentsAt TransAlta, we make decisions ethically and responsibly with the best interests of our stakeholders in mind.

We are committed to

• providing reliable service to our customers

• operating responsibly and with integrity

• protecting the safety of our employees, neighbours and the environment

• growing shareholder value

• driving operational excellence

• supporting the communities in which we live and work

• engaging with our neighbours and stakeholders

• taking a leadership role in Alberta’s and Washington State’s coal transition

Contact Information

TransAlta Corporation P.O. Box 1900, Station “M” 110 – 12th Avenue SW Calgary, Alberta Canada T2P 2M1

www.transalta.com

Corporate Office: 1.403.267.7110

TSX: TA NYSE: TAC

Community Relations: 1.877.547.3365, extension 1

Investor Relations: 1.800.387.3598 investor_relations@transalta.com

Media Relations: 1.855.255.9184 TA_Media_Relations@transalta.com

Aboriginal Relations: aboriginal_relations@transalta.com

Investing in CommunitiesTransAlta energizes communities by supporting programs and initiatives that keep them strong. In 2014, TransAlta donated over $3.9 million to communities, including almost $2 million to local United Way chapters. Other organizations we support are Light Up the World, the Calgary Stampede, The Young Canadians, Mother Earth’s Children’s Charter School and the Washington State Salvation Army.

Today, we have relationships with over 40 Aboriginal groups across Canada. We sponsor Aboriginal career fairs, support cultural and literacy programs, and sponsor community events. We also provide coaching and mentoring to Aboriginal contractors and scholarships to Aboriginal students.

Awards & Recognition

Fortescue River Gas Pipeline, Western Australia Glenn Isaac, Manager Environment, Health and Safety - Hydro Operations, Barrier Ryan Charles Schmidt, Manager, Strategy and Mergers & Acquisitions, Paul Band Pow Wow

• Commercial and Industrial Energy Services

• Wholesale Energy Solutions

• Green Energy Sustainable Options

• Energy Management Services

Earning your businessTransAlta’s energy experts have a wide range of experience providing competitive, reliable and customized solutions. Every day we help customers manage energy costs, security of supply and environmental footprints.

To support your business, we offer:

For additional details, visit www.transalta.com/customers Or call us at: 1-877-700-WATT

• 2014 United Way “Thanks A Million Award” For contribution of over $1 million; fourteenth consecutive year

• FTSE4Good Index – 2014 For meeting globally recognized corporate responsibility standards; eigth year

• Corporate Knights – 2014 50 Best Corporate Citizens in Canada

• The Canadian Council for Aboriginal Business (CCAB) – 2014 Progressive Aboriginal Relations (PAR) Certificate – Silver Level

TransAlta TodayTransAlta brings together the best electrical power generation resources with the best energy marketing capability to ensure that our large and medium industrial, commercial and utility customers in Canada, the United States and Australia get the power they need, when and where they need it.

About TransAlta

Fleet Diversity*

• 100+ years of generation experience

• Just over 2,300 employees

• 68 facilities

• Expertise in 5 fuel types: gas, hydro, wind, solar and coal

• Sponsor and majority owner of TransAlta Renewables

• Over 8,700 MW of net capacity in operation*

• 3 key geographies: Canada, the United States and Australia

• 1 gas pipeline in Western Australia

• 1 surface coal mine in Highvale, Alberta, Canada, operated by SunHills Mining LP

Coal 57%

Gas 17%

Wind* 16%

Hydro* 11%

Solar* 0.2%

*Renewables

Net Capacity Owned by Fuel Type (In Operation & Development)

Canada 76%

United States 18%

Australia 7%

Net Capacity Owned By Geography (In Operation & Development)

*Includes 100% of TransAlta Renewables Assets

*Includes 100% of TransAlta Renewables Assets. Net capacity percentages may not add due to rounding.