Transition underscores Stem’s commitment to simplifying energy asset management through consolidated platform brand

Stem, Inc. (NYSE: STEM) (“Stem” or the “Company”), a global leader reimagining technology to support the energy transition, today announced the rebranding of its flagship enterprise platform, Athena^®, to PowerTrack™ Optimizer. Powering Managed Service offerings, the move represents the evolution of Stem's intelligent software tools, designed to help organizations unlock the full value of their clean energy systems while simplifying operations and maximizing both economic and environmental benefits.

The evolution of Athena into PowerTrack Optimizer supports the Company’s consolidation of offerings into a single stack under one name, PowerTrack, combining the strengths of existing offerings to create a unified solution serving energy management needs from one place throughout the entire project lifecycle. The platform rebrand is launched alongside the unveiling of Stem’s full website refresh, live on Sept. 5, designed to illustrate the newly integrated PowerTrack suite with simplicity, at Stem.com.

PowerTrack Optimizer maintains the robust capabilities trusted by customers for more than a decade, including forecasting, value stacking, real-time dispatch, constraint management, and financial optimization, while reinforcing its position as the intelligent core powering Stem’s Managed Services. The solution simplifies operational complexity and promotes the delivery by energy assets of reliable performance and long-term returns for owners and developers.

“The rebranding to PowerTrack Optimizer reflects our commitment to delivering the most advanced energy asset optimization platform in the market as part of a single powerful stack,” said Arun Narayanan, CEO at Stem. “This evolution represents our continued innovation in helping clients capture the full potential of their energy investments and doing so with as much clarity as possible. This unification is more than a rebrand – it’s a launchpad. By bringing our software tools under the PowerTrack name, we are giving customers a clearer path to managing their clean energy investments with confidence while maintaining the trusted performance and reliability they have come to expect from Stem.”

PowerTrack Optimizer delivers a comprehensive suite of capabilities designed to help customers maximize performance and financial outcomes across their clean energy systems. The platform supports four critical areas:

• 24/7 Monitoring and Asset Alerts – Provides continuous visibility into system health with real-time alerts and detailed reporting, helping ensure uptime and enabling rapid issue recognition.
• Value Stacking and Revenue Optimization – Unlocks the full economic potential of each system by capturing value across wholesale markets, ancillary services, tariffs, incentive programs, coincident peak management, and demand response.
• Operational Visualization and Reporting – Offers intuitive visualizations of daily system operations alongside comprehensive financial performance reporting for greater transparency and control.
• Project Valuation – Delivers advanced scenario-based financial forecasts that integrate solar and storage data, equipping customers with actionable insights for investment planning and portfolio growth.

“PowerTrack Optimizer is more than a new name for the Athena platform – it also reflects how we’ve expanded and strengthened the Stem platform to align across the storage and solar energy ecosystem,” said Mike Carlson, President of Managed Services and OEM Hardware at Stem. “This rebrand underscores that the same technology that enables Stem’s Managed Services – already proven in the field by managing almost 2 GWh of battery storage assets with trusted performance and reliability – is now directly integrated within the PowerTrack platform. With PowerTrack Optimizer, customers will receive greater capabilities, clarity and confidence as they navigate an increasingly complex energy landscape, backed by solutions that deliver measurable results today and position them for tomorrow’s energy opportunities.”

PowerTrack Optimizer is backed by expert support and designed to adapt to evolving market conditions and emerging opportunities in the rapidly changing clean energy sector.

For more information, visit stem.com.

About Stem

Stem (NYSE: STEM) is a global leader reimagining technology to support the energy transition. Turning complexity into clarity, and potential into performance.

Helping asset owners, operators and stakeholders benefit from the full value of their energy portfolio by enabling the intelligent development, deployment, and operation of clean energy assets. Stem’s integrated software suite, PowerTrack, is the industry standard and best-in-class for asset monitoring, supported by professional and managed services, under one roof. Meant to tackle challenges as seamlessly as possible, Stem shows the information needed clearly and accurately and helps harness raw data to inform actionable insight. With global projects managed in 55 countries, customers have relied on Stem for nearly 20 years to maximize the value of their clean energy projects.

Driven by human and artificial intelligence – Stem is unlocking energy intelligence. Learn more at stem.com.

Disclaimer Regarding Forward-Looking Statements

This press release, as well as other statements we make, contains “forward-looking statements” within the meaning of the federal securities laws, which include any statements that are not historical facts. Such statements often contain words such as “expect,” “may,” “can,” “believe,” “predict,” “plan,” “potential,” “projected,” “projections,” “forecast,” “estimate,” “intend,” “anticipate,” “ambition,” “goal,” “target,” “think,” “should,” “could,” “would,” “will,” “hope,” “see,” “likely,” and other similar words. Forward-looking statements address matters that are, to varying degrees, uncertain, such as statements about PowerTrack Optimizer and the newly integrated PowerTrack suite, and their expected benefits to customers, our business strategies and those of our customers; our ability to retain or upgrade current customers, and our ability to further penetrate existing markets or expand into new markets; Such forward-looking statements are subject to risks, uncertainties, and other factors that could cause actual results or outcomes to differ materially from those expressed or implied by such forward-looking statements, including but not limited to our inability to execute on, and achieve the expected benefits from PowerTrack Optimizer and the newly integrated PowerTrack suite, as well as our operational and strategic initiatives; including from our cost reduction, workforce reduction and restructuring efforts; our inability to successfully execute on our strategy; the effects of the One Big Beautiful Bill on our business and that of our customers; disruptions in sales, production, service or other business activities; general macroeconomic and business conditions in key regions of the world, including inflationary pressures, general economic slowdown or a recession, high interest rates, changes in monetary policy, changes in trade policies, including tariffs or other trade restrictions or the threat of such actions, and instability in financial institutions; the direct and indirect effects of widespread health emergencies on our workforce, operations, financial results and cash flows; geopolitical instability, such as the armed conflicts between Russia and Ukraine and in the Gaza Strip and nearby areas; the results of operations and financial condition of our customers; pricing pressures; severe weather and seasonal factors; our inability to continue to grow and manage our growth effectively; our inability to attract and retain qualified employees and key personnel; our inability to comply with, and the effect on our business of, evolving legal standards and regulations, including those concerning data protection, consumer privacy, sustainability, and evolving labor standards; risks relating to the development and performance of our software-enabled services; our inability to retain or upgrade current customers, further penetrate existing markets or expand into new markets; the risk that our business, financial condition and results of operations may be adversely affected by other political, economic, business and competitive factors; and other risks and uncertainties discussed in this release and in our most recent Forms 10-K, 10-Q and 8-K filed with or furnished to the SEC. If one or more of these or other risks or uncertainties materialize (or the consequences of any such development changes), or should our underlying assumptions prove incorrect, our actual results or outcomes, or the timing of these results or outcomes, may vary materially from those reflected in our forward-looking statements. Forward-looking statements and other statements in this release regarding our environmental, social, and other sustainability plans and goals are not an indication that these statements are necessarily material to the Company, investors, or other stakeholders, or required to be disclosed in our filings under U.S. securities laws or any other laws or requirements applicable to the Company. In addition, historical, current, and forward-looking environmental, social, and sustainability-related statements may be based on standards for measuring progress that are still developing, internal controls and processes that continue to evolve, and assumptions that are subject to change in the future. Forward-looking statements in this press release are made as of the date of this release, and the Company disclaims any intention or obligation to update publicly or revise such forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by law.

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PowerTrack Optimizer is more than a new name for the Athena platform – it also reflects how we’ve expanded and strengthened the Stem platform to align across the storage and solar energy ecosystem.