Timeline
- 1961: Martin Marietta formed by merger of the Glenn L. Martin Company and American-Marietta Corporation
- 1969: Martin Marietta commissioned to build the Mark IV monorail used on the Walt Disney World Monorail System between 1971-1989.
- 1971: Martin Marietta loses landmark sex discrimination suit before the Supreme Court, in Phillips v. Martin Marietta Corp.
- 1975: Acquires Hoskyns Group (UK IT services company)
- 1982: Bendix Corporation's attempted takeover ends in its own sale to Allied Corporation; Martin Marietta survives.
- 1986: Wins contract to convert Titan II ICBMs into space launch vehicles. The Martin Company built the original ICBMs.
- 1987: Electronics & Missiles Group formed, headquartered in Orlando
- 1991: Electronics & Missiles Group reorganized into the Electronics, Information & Missiles Group
- 1993: Acquires GE Aerospace for 3 billion USD, allowing combined marketing of complementary systems, e.g. Martin Marietta's Titan missiles launching GE Aerospace's satellites.
- 1993: Acquires management contract for Sandia National Laboratories.
- 1993: Acquires General Dynamics' space systems unit.
- 1994: Martin Marietta completed its initial public offering of 19% of the common stock of Martin Marietta Materials, which is listed on the New York Stock Exchange as MLM.
- 1995: Martin Marietta merged with Lockheed Corporation to form Lockheed Martin
- 1996: Lockheed Martin splits off Martin Marietta Materials as a separate and independent entity.
- 2012: Diamond-Might Laboratories acquires sequel company Marietta 2.
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