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| 1955 - | Ten investors build the Ebb Tide, the first oil and gas service vessel. |
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| 1956 - | Tidewater Marine Service, Inc., a public company, opens for business in the U.S. Gulf of Mexico. |
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| 1958 - | International operations begin in Lake Maracaibo, Venezuela. |
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| 1962 - | Tidewater pays first stock dividend of $.05 per share. |
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| 1963 - | Net earnings exceed $1 million mark for the first time. |
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| 1966 - | Fleet expands to greatest numbers. More than 200 vessels at work in the United States, South America, Central America and West Africa. |
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| 1968 - | Tidewater acquires Twenty Grand Marine increasing fleet to 350 vessels. |
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| 1969 - | Tidewater acquires South Coast Gas Compression to create Tidewater Compression Service, Inc. |
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| 1970 - | The New York and Pacific stock exchanges list Tidewater 'TDW.' Tidewater also acquires interest in oil production in waters off of Indonesia. |
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| 1971 - | Tidewater acquires corporate office in the Tidewater Marine building in New Orleans, Louisiana. |
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| 1977 - | Tidewater's name expands to Tidewater Inc. and the company acquires a 24-story building in New Orleans for corporate headquarters: Tidewater Place. In addition, Tidewater Inc. purchases Hilliard Oil & Gas, an oil drilling and production firm. |
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| 1978 - | Revenues rise above $180 million and earnings top $30 million. |
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| 1979 - | Tidewater Inc. adds 26 new vessels to its marine fleet at a cost of $37.1 million. |
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| 1983 - | Tidewater Inc. completes a $200 million, 59-vessel new construction program. |
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| 1984 - | Irwin Jacobs Group offers to purchase all of Tidewater's stock in a merger proposal. |
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| 1985 - | Tidewater Inc. records first loss in its 29-year history when the oil and gas industry endures some of the worst times on record. The company also sells Hilliard Oil & Gas. |
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| 1986 - | Tidewater Inc. completes a two-year building program that adds 40 vessels to the fleet at a cost of $104 million. |
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| 1987 - | Tidewater Inc. records a $56.7 million loss and restructures debt with its major lenders. The company's Indonesian oil interests are sold. |
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| 1989 - | The company receives but refuses an unsolicited buyout offer from the Jacobs Group who owned, at that time, 20.6 percent of Tidewater's stock. |
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| 1990 - | Tidewater Inc. completes a successful offering of 5.5 million shares of common stock and pays down $61 million in senior debt. |
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| 1991 - | The company's profitability returns and Tidewater Inc. begins a merger with Zapata Gulf Marine that will double the size of Tidewater Marine. |
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| 1992 - | The merger with Zapata Gulf Marine is successfully completed and Tidewater Inc. purchases 19 offshore construction vessels from McDermott International. |
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| 1993 - | Tidewater Inc. donates Tidewater Place to Tulane University. The company retires all senior debt. |
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| 1994 - | Chairman, President and Chief Executive Officer John P. Laborde retires. Tidewater Compression expands by acquiring two companies - Brazos Gas Compression Corp. and a subsidiary of energy giant, Halliburton. William C. O'Malley takes over as Tidewater's chairman, president and CEO. |
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| 1995 - | Tidewater Inc. restructures its corporate headquarters and field management offices. |
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| 1996 - | Tidewater Inc. acquires Hornbeck Offshore Services, pushing the company's vessel count to more than 600. |
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| 1997 - | Tidewater Inc. acquires O.I.L. Ltd., increasing its fleet to more than 700 vessels. |
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| 1998 - | Revenues top the $1 billion mark for the first time. Earnings reach a record $315 million, doubling the earnings of a year earlier and quadrupling the earnings of two years previous. |
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| 2000 - | Tidewater Inc. embarks on a $250 to $300 million new construction program that will position the company to fill a new market niche involving deepwater exploration. |
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| 2001 - | Tidewater's modest new build program is upgraded to a $700 million plan, which will make her fleet among the top competitors in the deepwater markets of the world. |
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| 2002 - | Dean E. Taylor takes over from William C O'Malley as Chairman, President and CEO |
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| 2003 - | Tidewater announces its acquisition of 27 vessels from Ensco, which was part of an ongoing effort toward its fleet expansion and improvement programs |
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| 2004 - |
Tidewater receives the prestigious Safety in Seas Award granted by the
National Ocean Industries Association (NOIA) |
