Rocket Lab Files Prospectus Supplement for Share Resale

Details

This follows the acquisition of Mynaric AG and is in accordance with the Stock Purchase Agreement dated September 25, 2025. The shares were issued on April 14, 2026, in a private placement. A legal opinion from Goodwin Procter LLP is included as Exhibit 5.1.

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About Rocket Lab USA Inc.

Rocket Lab USA Inc. is an innovative aerospace company specializing in the manufacture and launch of small satellite launch vehicles. The company's primary purpose is to facilitate rapid and reliable access to space, a crucial service as the demand for satellite deployment grows across numerous industries. Through its Electron launch vehicle and recently developed Neutron rocket, Rocket Lab USA Inc. impacts sectors such as telecommunications, earth observation, space research, and national defense. Additionally, Rocket Lab develops and provides small satellite solutions, including satellite components, and services for end-to-end space missions. Founded in 2006 and headquartered in Long Beach, California, the company has established itself as a significant force in the commercialization of space, supporting new space ventures and contributing to technological advancements. By reducing costs and providing frequent launch opportunities, Rocket Lab USA Inc. plays a vital role in furthering the accessibility of space exploration and satellite management.