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I&M Files Large Load Tariff to Provide Customer Protections

October 20, 2025

Indiana Michigan Power (I&M), an American Electric Power (Nasdaq:AEP) company, recently filed proposed modifications to I&M’s Large Power Tariff (Tariff LP) with the Michigan Public Service Commission (MPSC).

The Large Power Tariff will apply to those customers commonly referred to as Large Load customers, requiring a substantial amount of energy to operate and maintain their operations. Under this filing, Large Load customers are those who use 50 megawatts (MW) or higher at any single site or combination of sites.

“I&M’s goals with the Large Power Tariff are to ensure system reliability, protect our existing customers from potentially adverse impacts related to large investments and deliver affordable service for all customers, while also addressing significant increases in electrical demand required by future Large Load customers. We’re committed to providing the best service possible for all customers while supporting economic growth in the communities we have the privilege to serve,” said Steve Baker, I&M’s president and chief operating officer.

The updated tariff filed with the MPSC recognizes the energy needs of potential new Large Load customers and proposes additional commitments that these customers must make associated with the electric service they have requested and receive. These requirements are important to balance the interest of new Large Load customers with those of I&M’s other customers.

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Indiana Michigan Power (I&M) is headquartered in Fort Wayne, and its approximately 2,000 employees serve more than 600,000 customers. More than 85% of its energy delivered in 2024 was emission-free. I&M has at its availability various sources of generation including 2,278 MW of nuclear generation in Michigan, 450 MW of purchased wind generation from Indiana, more than 22 MW of hydro generation in both states and approximately 35 MW of large-scale solar generation in both states. The company’s generation portfolio also includes 1,497 MW of coal-fueled generation.

At American Electric Power, based in Columbus, Ohio, we understand that our customers and communities depend on safe, reliable and affordable power. Our nearly 17,000 employees operate and maintain more than 40,000 miles of transmission lines, the nation's largest electric transmission system, and more than 225,000 miles of distribution lines to deliver power to 5.6 million customers in 11 states. AEP also is one of the nation's largest electricity producers with nearly 29,000 megawatts of diverse generating capacity, including approximately 6,100 megawatts of renewable energy. AEP is investing $43 billion over the next five years to make the electric grid cleaner and more reliable. We are on track to reach an 80% reduction in carbon dioxide emissions from 2005 levels by 2030 and have a goal to achieve net zero by 2045. AEP is recognized consistently for its focus on sustainability, community engagement and inclusion. AEP's family of companies includes utilities AEP Ohio, AEP Texas, Appalachian Power (in Virginia and West Virginia), AEP Appalachian Power (in Tennessee), Indiana Michigan Power, Kentucky Power, Public Service Company of Oklahoma, and Southwestern Electric Power Company (in Arkansas, Louisiana, east Texas and the Texas Panhandle). AEP also owns AEP Energy, which provides innovative competitive energy solutions nationwide. For more information, visit aep.com.

MEDIA CONTACT:                                                   

Stephanny Smith                                                                               

Communications Director                                                                              

260-409-4292

Slsmith2@aep.com

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