|Traded as||NYSE: LLL
S&P 500 Component
|Headquarters||600 Third Avenue
New York City, New York, United States
|Key people||Michael T. Strianese
(Chairman, President and CEO)
|Products||AVCATT, numerous specialized components|
|Employees||Approximately 48,000 (2014)|
L-3 Communications Holdings is an American company that supplies command and control, communications, intelligence, surveillance and reconnaissance (C3ISR) systems and products, avionics, ocean products, training devices and services, instrumentation, space, and navigation products. Its customers include the Department of Defense, Department of Homeland Security, U.S. Government intelligence agencies, NASA, aerospace contractors and commercial telecommunications and wireless customers.
L-3 (named for Frank Lanza, Robert LaPenta and Lehman Brothers) was formed in 1997 to acquire certain business units from Lockheed Martin. These units had belonged to Lockheed Corporation and Martin Marietta, which had merged the year before.
On November 4, 2010 L-3 issued a part purge notification to prevent future use of Chinese counterfeit parts, but did not notify its customers whose display systems suffered from much higher than expected failure rates.
- Training & Simulation Division of Raytheon Systems Co., based in Arlington, Texas. This company was formerly known as Hughes Training, Inc., and part of the Hughes Aircraft Defense Group purchased by Raytheon from General Motors two years earlier. The division traces its ancestry to the original company formed by Edwin Link, inventor of the airplane simulator.
- Raytheon Intelligence and Information Systems located in Greenville, Texas, Waco, Texas, and Lexington, Kentucky. These companies were originally part of E-Systems.
- SyColeman Corporation, which came about from the joining of Sy Technologies and Coleman Research Corporation.
- Ship Analytics, Inc.
- Titan Corp., after a failed buyout attempt by Lockheed Martin.
- L-3 Communication Combat Propulsion Systems, previously owned by General Dynamics Land Systems.
- L-3 Communications MAPPS, previously CAE's Marine Controls unit
- Electron Dynamic Devices from Boeing Satellite Systems.
- Advanced System Architectures, a company based in Fleet, Hampshire, United Kingdom. L-3 ASA has core capabilities in the development and through-life management of complex information systems, data fusion and tracking solutions, and interoperable secure communications systems.
- Crestview Aerospace, a company based in northwest Florida. Crestview Aerospace provides aircraft structures, major airframe assemblies, and military aircraft modifications for leading prime contractors and OEMs in the aerospace industry.
- Nautronix and MariPro, based in Fremantle, Australia and Santa Barbara, California, respectively, from Nautronix Plc in Aberdeen, Scotland. Nautronix and MariPro provide acoustic ranges and hydrographics to commercial and defense markets.
- TRL Technology, a specialist defense electronics company based in Gloucestershire, United Kingdom. TRL Technology is internationally known for development and innovation in the fields of interception, surveillance, electronic warfare, and communications.
- Insight Technologies, a company based in Londonderry, New Hampshire. Insight develops and builds optics, from night-vision goggles to weapon-mounted sights and lasers.
- Thales Training and Simulation (partial), a multinational company which manufactures simulators, including full flight simulators and military simulators, and provides related training and support services - a wholly owned subsidiary of the Thales Group. In August 2012 L-3 acquired Thales Group's civil fixed-wing flight simulation business. 
As of 2008, L-3 is organized under four business segments:
- Command, Control, Communications, Intelligence, Surveillance and Reconnaissance (C³ISR)
- Government Services
- Aviation, Maritime, and Human Intelligence
- IT and Other Services
- Training and Staff Augmentation Services
- Aircraft Modernization and Maintenance (AM&M)
- Aircraft Modernization and Support Services
- Aviation Support Operations
- Specialized Products
- Avionics, Displays, and Specialty Products
- Marine and Power Systems
- Microwave, RF, SATCOM and Antenna Products
- Security and Detection
- Sensors, Guidance, Navigation and Simulation
Frank Lanza, CEO and co-founder, died on June 7, 2006. CFO Michael T. Strianese was named as interim CEO, and was appointed Chairman, President and CEO of the company on October 23, 2006.
- L-3 ProVision, Millimeter Wave Airport Passenger Screening System
- L-3 eXaminer SX, 3DX, and XLB, Airport baggage scanning systems
- L-3 OptEX, Trace level explosive detection system
- AVCATT, a mobile aviation training simulator
- Orchid , Total Development & Simulation Environment (Power, Marine)
- EOTech, Holographic weapon sights
- L-3 Sonoma EO, Electro Optical Imaging Systems, 1508M Dragon Eyes, 1205MD, 2111X, 2514X, & 2711G
Federal contract suspension
In 2010 it was announced that L3's Special Support Programs Division had been suspended by the United States Air Force from doing any contract work for the US federal government. A US Department of Defense investigation had reportedly found that the company had, "used a highly sensitive government computer network to collect competitive business information for its own use." A US federal criminal investigation  ended the temporary suspension on July 27, 2010.
- "L 3 COMMUNICATIONS HOLDINGS INC Current Report as of December 31, 2013 Form (8-K)" (XBRL). United States Securities and Exchange Commission. May 2, 2014.
- "Company Profile." L-3 Communications. Retrieved on March 10, 2010.
- "Robert V. LaPenta" L-1 Identity Solutions
- "2011 Washington Technology Top 100". Retrieved 10 December 2011.
- Rajghatta, Chidanand (30 March 2014). "Did IAF’s 'US-made' C-130J Super Hercules that crashed have fake Chinese parts?". indiatimes.com. TNN. Retrieved 30 March 2014.
- "L-3 MAPPS Company details". naval-technology.com. Retrieved 8 Jan 2011.
- "." L-3 Communications. Retrieved on May 24, 2010.
- "." Retrieved on Nov 24, 2014.
- Hodge, Nathan, "Spotlight On Private Firms At Pentagon", Wall Street Journal, June 12, 2010, p. 4.
- L-3 corporate website
- L-3 National Security Solutions
- L-3 Sonoma EO
- L-3 STRATIS
- L-3 ASA
- L-3 Communications, Security & Detection Systems
- L-3 Communications Electron Devices
- L-3 Communications, Scandia Division
- L-3 Communications MAPPS Inc.
- L-3 Communications, Global Security & Engineering Solutions (GS&ES)
- L-3 Communications, GS&ES, Praetorian Intelligent Surveillance Solutions
- L-3 Enterprise IT Solutions
- L-3 DPA, Global Training & Simulator Solutions
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