| 1934 | Financier Floyd Woodcock reorganized Louisiana Ice & Utilities into Louisiana Ice & Electric Company, which today is known as Cleco Corp. |
| 1938 | Rea Station, the company's first power plant went into operation in Bunkie, Louisiana. |
| | F. Hugh Coughlin joined the company. |
| 1945 | The company changed its name to Central Louisiana Electric Company Inc. (CLECO). |
| 1951 | Gulf Public Service Company merged with CLECO, doubling the size of the company. |
1953 | Teche Power Station began commercial operation. |
1968 | CLECO's common stock admitted for trading on the New York Stock Exchange. |
1969 | Toledo Bend hydroelectric power project completed. |
1975 | Rodemacher Unit 1 went into commercial operation. |
1978 | Central Louisiana Energy Corporation (ENERGY) formed becoming the parent company and owner of all of CLECO's outstanding common stock. |
1981 | CLECO separated from its parent company (ENERGY). |
| 1982 | Rodemacher Unit 2 went into commercial operation. |
| CLECO common stock listed on the NYSE for the second time under the symbol CNL. |
1986 | New headquarters opened in Pineville. |
| | Dolet Hills Power Station began commercial operation. |
| 1997 | CLECO purchased Teche Electric Cooperative Inc. |
| 1998 | CLECO changed its name from Central Louisiana Electric Company Inc. to Cleco Corp. (Cleco) and adopted a new logo. |
| 1999 | Cleco implemented a public utility holding company structure, with Cleco Utility Group and Cleco Midstream Resources LLC as two primary subsidiaries. |
| 2000 | Cleco's first wholesale power plant, Evangeline Power Station, began commercial operation. |
| | Cleco Utility Group LLC changed its name to Cleco Power LLC. |
| 2002 | Perryville Power Station and Acadia Power Station, the company's other two wholesale power plants, began commercial operation, ending the largest construction phase in Cleco's history, and doubling its generation capacity. |
| | Cleco received the Edison Electric Institute’s (EEI) prestigious Emergency Response Award for restoring power so quickly after Hurricane Lili, which affected more than 165,000 customers. |
| | Cleco put its wholesale generation growth strategy on hold after an overbuilt power market and collapsing energy-trading market strained the finances and reputations of many energy companies. Cleco determined, in light of market conditions and other factors, to discontinue speculative trading activities following an assessment of its strategies. |
| 2004 | Cleco reached an agreement to sell its 718-megawatt Perryville Power Station to a subsidiary of Entergy Corp. |
| 2005 | Cleco completed sale of Perryville Power Station to Entergy Louisiana Inc. |
| | Cleco announced the planned construction of its new $1 billion, 600-megawatt solid-fuel generating unit to help stabilize customers’ costs by limiting the company’s dependence on natural gas and diversifying its fuel mix. The unit’s Circulating Fluidized-Bed Technology will give it the flexibility to burn a variety of less expensive fuels. |
| | Cleco’s service territory is hit by two deadly storms, hurricanes Katrina and Rita, back to back, causing more than $160 million in storm damage. |
| 2006 | Cleco once again received the prestigious Emergency Response Award from EEI for its heroic efforts to restore power to more than 220,000 customers in the aftermath of hurricanes Katrina and Rita. |
| | Cleco broke ground on its $1 billion, 600-megawatt generating unit at Rodemacher Power Station near Boyce, Louisiana. The unit is the third of two existing units at the Rodemacher site. |
| 2010 | Cleco completed Rodemacher Unit 3, the largest generation project in the company's history. |
| | Cleco Power acquired the 580-megawatt Acadia unit from Acadia Power Partners |
