Ursa Major

Company · Munitions and hypersonics

rocket engines

Solid rocket motors and engines; a bottleneck the Pentagon is trying to widen. Going public via SPAC in early 2027.

Money: Raised $544M to date
Valued at $600M (round 2025-11)
As of 2026-08-25 · source 1 source 2
SPAC announced August 2026 at about $2.3B pro forma, expected to close early 2027.
Backed by: Eclipse
Named lead or co-lead in a round announcement.
Lead investors: Series E led by Eclipse (November 2025); Series D co-led by Explorer 1 Fund and Eclipse (2023); Series C led by BlackRock funds (2021). source
People behind the money: Lior Susan Seth Winterroth