Impulse Space, founded by Tom Mueller—an alumnus of SpaceX—announces it has raised $500 million to scale up its fleet of ultra-mobile spacecraft. Multiple reports describe the company’s focus as developing “space tugs”: satellites or spacecraft designed to move payloads, such as other satellites, between different orbits. The funding is intended to support further development and deployment of these platforms as the company works toward commercialization in what it describes as a new era for the space economy. Bloomberg also reports that the financing places Impulse Space at a roughly $4 billion valuation, framing the round as part of broader growth plans under CEO Tom Mueller. Both outlets characterize the company’s spacecraft as capable of hauling payloads across orbital regimes, emphasizing mobility as a core differentiator. While details of specific missions or timelines are not provided in the excerpts, the coverage aligns on the amount of funding, the company’s SpaceX-linked leadership, and the stated goal of scaling ultra-mobile “space tug” capabilities.