L-3 Communications Holdings, Inc. (the “Company”) (NYSE: LLL) announced today that it has adjusted the conversion rate for its 3% Convertible Contingent Debt Securities (CODES) due 2035 (CUSIP Numbers: 502413AW7 and 502424AE4; ISIN Numbers: US502413AW73 and US502424AE49) (the “Securities”) in connection with the regular quarterly dividend of $0.50 per share of the Company’s Common Stock paid on September 17, 2012 and the regular quarterly dividend of $0.50 per share of the Company’s Common Stock expected to be paid on December 17, 2012. The new conversion rate is 10.9640 shares of Common Stock of the Company per $1,000 principal amount of the Securities, effective for conversions on or after November 19, 2012. Notices of the conversion rate adjustment have been delivered to holders of the Securities in accordance with the terms of the Indenture governing the Securities. Headquartered in New York City, L-3 employs approximately 51,000 people worldwide and is a prime contractor in C 3ISR (Command, Control, Communications, Intelligence, Surveillance and Reconnaissance) systems, aircraft modernization and maintenance, and national security solutions. L-3 is also a leading provider of a broad range of electronic systems used on military and commercial platforms. To learn more about L-3, please visit the company’s website at www.L-3com.com. L-3 uses its website as a channel of distribution of material company information. Financial and other material information regarding L-3 is routinely posted on the company’s website and is readily accessible. Safe Harbor Statement Under the Private Securities Litigation Reform Act of 1995 Except for historical information contained herein, the matters set forth in this news release are forward-looking statements. Statements that are predictive in nature, that depend upon or refer to events or conditions or that include words such as “expects,” “anticipates,” “intends,” “plans,” “believes,” “estimates,” “will,” “could” and similar expressions are forward-looking statements. The forward-looking statements set forth above involve a number of risks and uncertainties that could cause actual results to differ materially from any such statement, including the risks and uncertainties discussed in the company’s Safe Harbor Compliance Statement for Forward-Looking Statements included in the company’s recent filings, including Forms 10-K and 10-Q, with the Securities and Exchange Commission. The forward-looking statements speak only as of the date made, and the company undertakes no obligation to update these forward-looking statements.