Boeing Wins $14.7B Lockheed Deal to Triple PAC-3 MSE Seeker Production

Boeing secured an undefinitized contract action (UCA) from Lockheed Martin worth up to $14.7 billion to triple the production of PAC-3 Missile Segment Enhancement (MSE) seekers. The seven-year agreement accelerates the output of these guidance components for the Patriot air defense system.

"Early investment and a relentless focus on quality and execution have positioned us to now deliver seekers at unprecedented levels in the near-term, and we're committed to building on that momentum," said Steve Parker, president and CEO of Boeing Defense, Space & Security, in a statement regarding the contract.

Understanding the UCA Mechanism

The use of an undefinitized contract action is notable given the current legislative environment. A UCA allows a contractor to begin work and incur costs before final prices, terms, and quantities are fully negotiated between the parties.

According to a report from Breaking Defense, this mechanism is significant because fiscal 2027 budget appropriations remain pending. By utilizing a UCA, the parties can maintain production for the Patriot system's guidance technology without waiting for the finalization of federal funding cycles.

Production Scaling and Market Impact

The agreement formalizes a long-term production roadmap intended to meet global demand for air defense capabilities. The PAC-3 MSE seeker is a component that enables the Patriot missile to intercept threats, including tactical ballistic missiles and cruise missiles.

Boeing Co. (BA) shares were trading at $190.37, up 1.40%, as of October 9, 2026. The contract represents a commitment to Boeing's manufacturing capacity within the defense sector, as the company scales its seeker output over the next seven years.