
Helios
High-energy orbital transfer stage designed to transport payloads beyond low Earth orbit.
- Unveiled
- Jan 2024


Startup · United States
HQ Redondo Beach, United StatesFounded 2021201-500 employees
In-space transportation vehicles for commercial, civil and government payloads.
Newest unveiled first. Open a product for its milestone timeline, components and sources.
| Announced | Stage | Valuation | Basis |
|---|---|---|---|
| Jun 2, 2026 | Series D | $4.26B | Basis not stated |
| Sep 16, 2026 | Series D | $5.40B | Basis not stated |
| Announced | Stage | Amount | Valuation | Lead investors | Other investors | Confidence |
|---|---|---|---|---|---|---|
| Sep 16, 2026 | Series D | $308M | $5.40B? | — | 137 Ventures, Banner VC, DFJ Growth, Linse Capital, Lux Capital, Valor Equity Partners | Reported |
| Jun 2, 2026 | Series D | $500M | $4.26B? | 137 Ventures, Banner VC | Founders Fund, Linse Capital, Lux Capital | Confirmed |
| Jun 2, 2025 | Series C | $300M | — | Linse Capital | Airbus Ventures, Balerion Space, DCVC, DFJ Growth, Founders Fund, Lux Capital, RTX Ventures, Tamarack Global, Trousdale Ventures, Valor Equity Partners | Confirmed |
| Sep 30, 2024 | Series B | $150M | — | Founders Fund | 137 Ventures, Airbus Ventures, Alumni Ventures, Balerion Space, DCVC, Lux Capital, Overmatch, RTX Ventures, Tamarack Global, Trousdale Ventures | Confirmed |
| Jul 24, 2023 | Series A | $45.0M | — | RTX Ventures | Airbus Ventures, Founders Fund, Lux Capital, Space Capital | Confirmed |
| Jun 16, 2022 | Seed | $10.0M | — | Lux Capital | — | Confirmed |
| Mar 29, 2022 | Seed | $20.0M | — | Founders Fund | — | Confirmed |
Totals add known amounts using recorded USD conversions where available; other currencies are shown separately. A ~ marks an estimated amount.
| Announced | Award | Agency | Type | Program | Obligated | Ceiling | Confidence |
|---|---|---|---|---|---|---|---|
| Jul 8, 2026 | NSSL Phase 3 Lane 1 initial capabilities assessment task orderpress:impulse-space:2026-07-08:nssl-lane1-task-order | Space Systems Command | Task order | — | — | Up to $5.0M | Confirmed |
| Jul 8, 2026 | NSSL Phase 3 Lane 1 IDIQ on-ramp for HeliosFA881126DB001 | Space Systems Command | IDIQ | — | Undisclosed | — | Confirmed |
| Oct 2, 2024 | VICTUS SURGO and VICTUS SALO SBIR Phase III contractFA880925CB001 | Space Systems Command | SBIR Phase III | — | $28.3M | $35.0M | Confirmed |
Obligated is what has been committed so far; ceiling is the most the award can reach. Joint values cover all recipients and are excluded from this company’s money totals.
Automation & Controls Technician ↗
Redondo Beach, CA · Full-time · Other
Availability unverified · Bright Data / LinkedIn
Observed Oct 5, 2026
Redondo Beach, CA · Full-time · Other
Availability unverified · Bright Data / LinkedIn
Observed Oct 5, 2026
Redondo Beach, CA · Full-time · Engineering
Availability unverified · Bright Data / LinkedIn
Observed Oct 5, 2026
Learning & Development Manager ↗
Redondo Beach, CA · Full-time · Other
Availability unverified · Bright Data / LinkedIn
Observed Oct 5, 2026
Sourcing Specialist (All Levels) ↗
Redondo Beach, CA · Full-time · Other
Availability unverified · Bright Data / LinkedIn
Observed Oct 5, 2026
A sample of observed listings, not a total vacancy count. Availability may have changed since collection. Categories are inferred from job titles.
Employee-profile counts reflect LinkedIn profiles associated with the company, not verified headcount. One observation establishes a baseline; it does not establish growth.
LinkedIn via Bright Data · Supports Organization · company size, Organization · founded, Organization · headquarters, Organization · logo, Organization · url
“{"company_size": "201-500 employees"}”
Impulse Space · Supports Organization, Organization · name, System
“Our vehicles move payloads across and between orbits”
Supports Government award, System
“today announced it has been awarded a Firm Fixed-Price (FFP), Indefinite-Delivery Indefinite-Quantity (IDIQ) NSSL Phase 3 Lane 1 contract”
Reuters · Sep 16, 2026 · Supports Funding round · amount, Funding round · post money valuation usd
“Impulse Space has raised $308 million in an extension of the Series D funding round”
Impulse Space · Jun 2, 2026 · Supports Funding round, Funding round · amount
“today announced it has raised $500 million in Series D funding.”
U.S. Securities and Exchange Commission · Jun 2, 2026 · Supports Funding round · amount
“Total Amount Sold $499,832,346 USD”
U.S. Securities and Exchange Commission · Jun 11, 2025 · Supports Funding round · amount
“Total Amount Sold $294,526,573 USD”
Impulse Space · Jun 2, 2025 · Supports Funding round, Funding round · amount
“The round, led by Linse Capital, brings Impulse’s total capital raised to $525 million.”
Impulse Space · Sep 30, 2024 · Supports Funding round · amount
“today announced a $150 million Series B funding round, led by Founders Fund.”
U.S. Securities and Exchange Commission · Aug 3, 2023 · Supports Funding round · amount
“Total Amount Sold $38,749,892 USD”
Business Wire (via StreetInsider) · Jul 24, 2023 · Supports Funding round, Funding round · amount
“The Series A funding round also included other participant investors, such as Founders Fund, Lux Capital, Airbus Ventures and Space Capital.”
Impulse Space · Jun 16, 2022 · Supports Funding round · amount
“today announced it has secured $10 million in funding by Lux Capital”
U.S. Securities and Exchange Commission · Apr 4, 2022 · Supports Funding round · amount
“Total Amount Sold $19,999,997 USD”
Impulse Space · Mar 29, 2022 · Supports Funding round · amount
“today announced it has secured $20 million in a seed round led by Founders Fund”
Space Systems Command · Jul 8, 2026 · Supports Government award · ceiling usd
“Impulse and Relativity will each receive a $5 million FFP Task Order to conduct an initial capabilities assessment and develop their approach to tailored mission assurance.”
U.S. Department of War · Jul 7, 2026 · Supports Government award
“Impulse Space Inc., Redondo Beach, California (FA8811-26-D-B001); and Relativity Federal Inc., Long Beach, California (FA8811-26-D-B002), were awarded multiple-award, firm-fixed-price, indefinite-delivery/indefinite-quantity contracts”
Supports Government award
“announced today it has been awarded a $34.5 million Small Business Innovation Research (SBIR) Phase III contract”
USAspending.gov · Supports Government award · obligated amount
“Recipient: IMPULSE SPACE, INC.; Total obligation: $28,311,900.50; Base and all options value: $35,038,900.50; Description: IMPULSE SPACE SBIR PHASE III”
Crunchbase via Bright Data · Supports Role · founders
“{"founders": [{"id": "tom-mueller", "type": "person", "value": "Tom Mueller"}]}”
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.