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ITC Holdings Corp. operates as an independent electricity transmission company. The firm's operations performed by its regulated operating subsidiaries fall into the following categories: asset planning; engineering, design and construction; asset protection and performance; cyber security operations and engineering; maintenance; and real time operations. The asset planning group uses detailed system models and load forecasts to develop its system expansion capital plans. The engineering, design and construction group is responsible for design, equipment specifications, maintenance plans, and project engineering for capital, operation, and maintenance work. The asset protection and performance group is responsible for safety, human performance, security, and emergency preparedness and response. The cyber security operations and engineering group is responsible for protecting its digital assets and data by deploying advanced tools, techniques and monitoring systems designed to counteract and neutralize cyber threats. The maintenance category develops and track preventive maintenance plans to promote safe and reliable systems. The real time operations engages in the transmission system operators continuously monitor the performance of the transmission systems of its regulated operating subsidiaries, using software and communication systems to perform analysis to plan for contingencies and maintain security and reliability following any unplanned events on the system. The company was founded in November 2003 and is headquartered in Novi, MI.

ITC Midwest LLC provides electrical transmission services. The company was founded in 2007 and is headquartered in Plymouth, MI.

Delta Dental of Iowa operates as an insurance company. It provides dental and vision insurance plans for individuals, employers and government programs. The company is headquartered in Johnston, IA.