DTE Electric Investor Presentation Deck

Distinctive continuous improvement culture drives strong track record of cost management vs. peer average • Controlling costs while improving the customer experience and maintaining affordability DTE - - All 10,000+ employees engaged in Cl to surface and solve problems - Productivity enhancements Technology innovations Automation Infrastructure replacements Transition to cleaner energy Average annual percentage change in O&M costs 2008-2021 1% DTE Electric 1. Source: SNL Financial, FERC Form 1 and FERC Form 2; excluding fuel and purchase power from electric O&M and production expense from gas O&M 1% DTE Gas Electric utility¹ Gas utility¹ 3% Peer average 2.5% Peer average 7

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