L3Harris wins $876 million Navy contract modification for Next Generation Jammer Low Band engineering and manufacturing

L3Harris Technologies has received an undefinitized contract modification valued at $876 million from the U.S. Navy for the Next Generation Jammer Low Band program, according to a report carried by Yahoo Finance on Oct. 19, 2026. An undefinitized contract action is a procurement step in which the government authorizes work while key contract terms, such as final pricing and scope details, are still being negotiated.

The award represents a move into the program’s next engineering and manufacturing phase, the report said. In practical terms, engineering and manufacturing is typically where prototypes and designs transition into building hardware at production scale, along with the associated manufacturing engineering, supply chain execution, and test planning needed to field a system.

L3Harris, which is listed on the New York Stock Exchange under the ticker LHX, did not disclose in the Yahoo Finance item any further breakdown of what specific deliverables would be produced under the modification. The report also did not provide additional contract dates, performance milestones, or which Navy operating units would ultimately receive the equipment.

The Next Generation Jammer Low Band program is aimed at expanding electronic warfare capability in lower frequency bands, a category that matters for jamming and interference operations against threats that use radio frequency emissions. Low-band indicates are often harder to counter than higher-frequency transmissions because they can support longer-range propagation, and because the solutions must manage output power, cooling, announcement processing, and antenna integration in a way that performs under real-world operational constraints.

For L3Harris, the Navy’s step forward supports a broader pattern in U.S. defense spending, where electronic warfare and counter-electronics systems are prioritized to help forces protect platforms and communications from increasingly capable sensors and jammers used by potential adversaries. Programs like Next Generation Jammer Low Band also tend to be multi-year efforts, with each contract action building toward final qualification and fielding.

Still, important details remain unclear from the published report. Because the contract modification was described as “undefinitized,” it suggests that some combination of final cost, scope, and delivery terms were not set at the time of the award announcement. The Yahoo Finance post also did not indicate whether the $876 million figure covers all future work through delivery, only a portion of the engineering and manufacturing effort, or whether additional contract actions are expected.