International Space Station (ISS) NASA Research Announcement (NRA) Solicitation for PAM 5 and PAM 6.

NASA is seeking proposals for two short-duration private astronaut missions to the International Space Station, with launches scheduled no earlier than 2026, as part of its broader initiative to advance the commercialization of low Earth orbit. These missions, designated PAM 5 and PAM 6, fall under Phase II of Focus Area 4A of the NASA Research Announcement and are intended to enable U.S. companies to conduct activities in space that support commercial development while leveraging the unique environment of the ISS. The selection process is expected to conclude in the fourth quarter of this year, though final award decisions have not yet been determined. The solicitation is managed by the Johnson Space Center under the National Aeronautics and Space Administration, with a NAICS code of 541715, indicating classification within research and development in the physical, engineering, and life sciences. The opportunity is open to qualified commercial entities seeking to participate in the growing ecosystem of human spaceflight beyond government-led efforts.