Ursa Major
About
About Ursa Major
Ursa Major develops propulsion and complete aerospace and defense systems across hypersonics, solid rocket motors and space mobility. Its scope includes liquid rocket engines, tactically responsive satellite propulsion, extended-range rocket motors and HAVOC, a complete hypersonic missile system. Additive manufacturing, integrated testing and modular production architectures connect component design with all-up-round manufacturing.
In August 2026, Ursa Major signed a definitive business-combination agreement with Bleichroeder Acquisition Corp. III. The transaction is expected to close in the first quarter of 2027 subject to shareholder, regulatory and other approvals, so Ursa Major remains private. The company reported more than 5,500 ground tests, over 140,000 seconds of testing and engines used in more than a dozen successful hypersonic missions.
Operations
- Planned Annual Srm Capacity
target capacity of 200 SRMs per year - 2026-02-04 - Ursa Major said it was ramping Lynx-enabled solid rocket motor production toward capacity for 200 motors per year. - source posture: Company Disclosed
Source
Supply
Supply chain relationships
- Palantir Technologies
Inbound - Software - Palantir Technologies supplies Warp Speed production and supply-chain software for Ursa Major engine and rocket-motor manufacturing
Source
Funding
- 2025-11-18 - Series E - $100M - Ursa Major closes $100M Series E at $600M post-money valuation
valuation: $600M - Ursa Major closed a $100 million Series E led by Eclipse and received a separate $50 million of debt funding commitments. - source: ursamajor.com
- 2023-11-30 - Series D and D-1 - $138M - Ursa Major closes $138M across Series D and D-1
Ursa Major closed $138 million across its Series D and D-1 rounds to expand propulsion production and develop its Lynx solid-rocket-motor line. - source: ursamajor.com
- 2021-12-07 - Series C - $85M - Ursa Major raises $85M Series C funding
Ursa Major raised $85 million in Series C funding to expand production and develop additional propulsion systems. - source: ursamajor.com
Investors
- Alsop Louie Partners - Participant - VC - 1 funding event - first seen 2025-11-18
- Eclipse - Lead - Unknown - 1 funding event - first seen 2025-11-18
- Principia Growth - Participant - VC - 1 funding event - first seen 2025-11-18
- Woodline Partners - Participant - VC - 1 funding event - first seen 2025-11-18
- XN - Participant - Unknown - 1 funding event - first seen 2025-11-18
Team
- Chris Spagnoletti - Chief Executive Officer - Leads strategy, growth, operations and business execution as Ursa Major scales hypersonics, solid rocket motors and space-mobility systems.
- Justin Siebert - Chief Operating Officer - Leads production and manufacturing across Ursa Major locations and product lines.
Timeline
Events
- 2026-08-25 - Market Signal - Ursa Major signs conditional SPAC transaction targeting Q1 2027 close
The proposed transaction reflects approximately $1.6 billion pre-money equity value and $2.3 billion post-transaction equity value. At least $350 million of PIPE commitments support the transaction, including approximately $110 million expected to fund at signing. These are conditional transaction terms, not a completed private financing or confirmed private valuation.
Source - 2026-02-24 - Product Launch - Ursa Major unveils HAVOC hypersonic missile system
HAVOC uses the flight-proven Draper storable liquid rocket engine and a modular architecture compatible with several solid-rocket boosters. The system can throttle and restart during flight and operate endo- or exo-atmospherically. Ursa Major designed the system for launch from fighters, bombers, vertical-launch systems and ground-based platforms.
Source - 2025-11-18 - Funding - Ursa Major closes $100M Series E at $600M post-money valuation
Woodline Partners, Principia Growth, XN and Alsop Louie Partners joined the equity round. The capital supports scaled production across hypersonics, solid rocket motors and space mobility.
Source - 2025-05-06 - Production Milestone - Ursa Major validates Lynx solid-rocket-motor process
The tests covered material preparation, additive manufacturing, assembly and firing of the completed motor. The same production line supports both high-loading grain and traditional solid rocket motors. The high-loading-grain process supports extended range and custom thrust profiles.
Source - 2025-03-14 - Partnership - Ursa Major and Palantir partner on propulsion production
The deployment connects production planning, supply-chain data and manufacturing operations. Ursa Major will use the system across liquid-engine and solid-rocket-motor programmes. The partners framed the work as a way to increase throughput and shorten production timelines.
Source - 2023-11-30 - Funding - Ursa Major closes $138M across Series D and D-1
The disclosed amount combines the initial Series D and its subsequent D-1 extension. Investors included Explorer 1 Fund, Eclipse, RTX Ventures, BlackRock-managed funds and accounts, Mack & Co., XN and SV Pacific Ventures. Ursa Major directed the financing toward production capacity, Lynx development and other propulsion programs.
Source - 2021-12-07 - Funding - Ursa Major raises $85M Series C funding
Funds and accounts managed by BlackRock led the financing. XN and Explorer 1 joined the round alongside existing investors Alsop Louie Partners, Alpha Edison, Dolby Family Ventures, Space Capital and Harpoon Ventures. Ursa Major allocated the capital to Ripley and Hadley engine production and next-generation engine development.
Source
Relations
Relationships
- Palantir Technologies
Propulsion Manufacturing Software Partner - Ursa Major uses Palantir Warp Speed across production planning, supply-chain and manufacturing workflows for liquid engines and solid rocket motors.