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Private company

Cinergy

Logo: Cinergy Corporation, Public domain, via Wikimedia Commons3

American energy company

Cinergy Corp. ( SIN-ər-jee) was an energy company based in Cincinnati, Ohio, United States, from 1994 to 2006. Its name is a play on the words "synergy", "energy", and "Cincinnati".2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Oct 24, 1994Founded1

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Cinergy Corp. ( SIN-ər-jee) was an energy company based in Cincinnati, Ohio, United States, from 1994 to 2006. Its name is a play on the words "synergy", "energy", and "Cincinnati".2

The story

Cinergy was created on October 24, 1994, from the merger of the Cincinnati Gas & Electric Company (CG&E) and Kentucky subsidiary Union Light, Heat & Power (ULH&P) with Plainfield, Indiana–based PSI Energy (Public Service Indiana).

In 1996, Riverfront Stadium in Downtown Cincinnati was renamed Cinergy Field in a sponsorship deal with Cinergy. The stadium was demolished by implosion in December 2002 to make way for Great American Ball Park.

In 2005, Cinergy announced a friendly acquisition by the larger Charlotte, North Carolina–based Duke Energy. The acquisition was completed on April 3, 2006. The combined company retains the Duke Energy name. Until the acquisition, Cinergy still operated under the names of the three local utilities (e.g., Cinergy/CG&E in Cincinnati); since the acquisition, the names of the three former Cinergy utilities and Duke Power, the former Duke Energy utility subsidiary, have been phased out, although signs bearing the former logos still remain at some substations.

From Wikipedia’s article on Cinergy, shared under CC BY-SA 4.0.4

Acquisitions

  1. Oct 24, 1994Acquired Cincinnati Gas and Electric Company1

Timeline

  1. Apr 3, 2006Dissolved Dissolved1
  2. Oct 24, 1994Founded Founded1

Sources

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