FormerSpaceX

Ursa Major

Rocket engines and solid rocket motors, sold as products.

Founded
2015
Headquarters
Berthoud, CO
Disclosed funding
$238M
Status
Operating
Sector
Space
Latest round
—
Reported valuation
—
Website
ursamajor.com

Overview

Ursa Major builds liquid engines and solid rocket motors that launch companies and defense primes can buy rather than develop in-house. Founder Joe Laurienti was a SpaceX propulsion engineer.

Impact

  • Supplies propulsion to US hypersonics and launch programs

Funding

At least: $138M (2023) and a $100M Series E.

Disclosed funding is the sum of publicly reported rounds found in the sources below. It is a floor, not a complete total.

Founders

Joe Laurienti, Founder
At SpaceX: Propulsion engineer
propulsionrocket enginessolid rocket motorshypersonics

Sources

  1. Ursa Major: $138M raise
  2. Ursa Major: $100M Series E
  3. Jeff Burke: The SpaceX Effect

Last verified September 30, 2026.