The DGC Group

Diamond GENERATING LLC + BETM + NEXAMP + Diamond OFfshore Wind + Diamond Energy = Brilliant Solutions

The combined offerings of these five companies through the DGC Group (Diamond) provides a full range of electric generation and related services to:

  • Generation Asset Owners, Managers & Operators
  • Utilities
  • Investors
  • Developers
  • Community Choice Aggregators
  • Municipal and Co-operative utilities
  • Retail customers

Add to this the worldwide reach, network and financial strength of Diamond's parent company, Mitsubishi Corporation, and you have an unbeatable lineup of talent, breadth and financial underpinning.

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Sustainable Solutions Across the Energy Spectrum

For the past 20 years, Diamond has embraced new technologies and delivered innovative solutions to meet the exacting demands of a marketplace that places a premium on sustainable energy.

Our holdings include approximately 3.3 GW of electric generation in a 7.8 GW fleet of electric generation including:

  • Wind farms
  • Utility-scale and commercial and industrial solar generation arrays
  • Battery energy storage facilities
  • Natural gas-powered combined-cycle and simple-cycle generation facilities

Services Fit for An Owner

As a longtime owner and operator of electric generation, Diamond understands what it takes to maximize assets. From selecting a development site to financing, building and operating projects, Diamond has a long successful track record. DGC Group brings the benefits of this experience along with the latest market intelligence and technology options to customers across the continent.

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With offices in Los Angeles, Boston and Mexico City, Diamond currently has utility-scale generation ownership interests in:



7,800 MW

Total Capacity

3,300 MW

Net Equity