Globalstar, Inc.GSAT is advancing the development of its low Earth orbit (LEO) satellite network through the deployment of its HIBLEO-4 satellite replenishment mission. In May 2026, the company announced plans to launch the HIBLEO-4 replenishment satellites aboard a SpaceX Falcon 9 rocket as part of its ongoing efforts to maintain and enhance its current-generation satellite constellation. The mission is designed to replenish Globalstar's existing LEO network and support the continued delivery of satellite communications services worldwide.

The HIBLEO-4 satellites are intended to strengthen the resilience and reliability of Globalstar's satellite infrastructure. By replenishing the existing constellation, the company aims to ensure the continued performance of its network and maintain dependable connectivity across its range of satellite communication services. Management highlighted that the launch is an important step in sustaining the infrastructure that customers rely on daily and emphasized that constellation replenishment remains a key component of the company's long-term strategy.

The mission forms part of Globalstar's broader investment in satellite network development. Alongside the HIBLEO-4 replenishment effort, the company continues to advance its overall constellation roadmap. Globalstar expects replacement satellites for its second-generation constellation to be launched in 2026 while also progressing development of its third-generation, or C-3, constellation. The planned C-3 network, consisting of more than 50 satellites, is designed to expand network capacity, improve service durability and support growing demand across direct-to-device, Internet of Things (IoT), enterprise, government and defense applications.

Globalstar stated that the HIBLEO-4 mission is focused on reinforcing the company's current-generation LEO constellation to support ongoing network resilience and service reliability. Although the launch originally scheduled for May 17, 2026, was postponed to provide additional preparation time for the satellites, the company stated that the mission's objective remains unchanged. Through continued investment in replenishment satellites and next-generation network development, Globalstar is working to maintain reliable global connectivity across its satellite communications ecosystem.

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