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- Impulse Space
Impulse Space Valuation, Funding & Investors
Impulse Space is valued at $5.6B as of September 2026.
Last Impulse Space valuation
$5.6B
Series D · Sep 2026
Last Impulse Space funding round
$308M
Series D · Sep 2026
Cumulative funding Impulse Space raised
$1.3B
across 6 funding rounds
Key investors in Impulse Space
Founders Fund
Lux Capital
Linse Capital
Alumni Ventures
137 Ventures
Earthrise Ventures
About Impulse Space
Impulse Space is a Redondo Beach-headquartered developer of in-space transportation vehicles founded in 2021. The company builds orbital shuttles like Mira to transport satellite payloads from low Earth orbit to medium Earth orbit, geostationary orbit, and lunar trajectories. Serving satellite operators and government missions, its propulsion systems support rideshare deployments and precise orbit insertions. Operations focus on the commercial space sector with test flights conducted from Vandenberg Space Force Base.
Founded
2021
HQ
Website
Status
Privately held
Customer focus
B2B & B2G
Revenue model
Services
Valuation
$5.6B (Sep 2026)
Impulse Space Valuation
Impulse Space is currently valued at $5.6B, based on its Series D in September 2026.
The $308M round included 137 Ventures, Linse Capital, Lux Capital, DFJ Growth, Valor Equity Partners and 1 other investor.
Impulse Space's valuation has grown 1.3x from $4.3B at its Series D in June 2026 to $5.6B in September 2026, across 2 priced rounds.
Impulse Space valuation by funding round
| Date | Stage | Valuation |
|---|---|---|
| Sep 2026 | Series D | $5.6B |
| Jun 2026 | Series D | $4.3B |
Impulse Space Funding History
Impulse Space has raised a total of $1.3B across 6 funding rounds.
Impulse Space's first fundraising round was a $30M seed round in March 2022. The most recent completed round was a $308M Series D in September 2026.
Impulse Space funding rounds
| Date | Stage | Investors | Raised | Valuation | Deal Summary |
|---|---|---|---|---|---|
| Sep 2026 | Series D | 137 Ventures; Linse Capital; Lux Capital; DFJ Growth; Valor Equity Partners; Banner VC | $308M | $5.6B | Impulse Space closed a $308 million extension to its Series D financing round on September 16, 2026. The extension brought total Series D funding to $808 million following a $500 million Series D announced in June 2026. Investors in the extension included 137 Ventures, BANNER VC, DFJ Growth, Linse Capital, Lux Capital, and Valor Equity Partners. Proceeds will support platform engineering, orbital vehicle fabrication, manufacturing scale-up, and workforce expansion for the company’s in-space mobility services, including the Mira orbital transfer vehicle and Helios upper stage. The round was driven by strong demand from commercial and government customers. Impulse Space is an in-space mobility provider focused on moving satellites and other payloads in orbit. |
| Jun 2026 | Series D | 137 Ventures (lead); Banner VC (lead); Linse Capital; Lux Capital; Silent Ventures; Founders Fund | $500M | $4.3B | Impulse Space raised $500 million in a Series D round co-led by 137 Ventures and BANNER VC on June 2, 2026, bringing its total capital raised to over $1 billion. The funding is intended to support the company’s buildout of in-space mobility infrastructure for the space economy. The company is positioned as an in-space mobility leader, and the round signals continued investor support for its effort to expand space transportation and mobility capabilities. The announcement does not disclose a valuation, revenue, EBITDA, ownership change, cash-versus-stock structure, or earn-out terms. Impulse Space operates in the space infrastructure and propulsion sector, with a focus on in-space mobility. |
| Jun 2025 | Series C | Linse Capital (lead) | $300M | - | Impulse Space, founded in 2021 by Tom Mueller (SpaceX propulsion founder), is a leader in in-space mobility providing cost-effective spacecraft for orbital transfer services. The company manufactures two primary vehicles: Mira, a smaller in-space maneuvering platform, and Helios, a high-energy kick stage designed to transport payloads from low Earth orbit to medium Earth orbit, geostationary orbit, and beyond. Since inception, Impulse has successfully flown Mira on two customer missions and executed some of the largest maneuvers ever performed with nitrous-based propulsion systems. The company raised $300 million in a Series C funding round led by Linse Capital, bringing total capital raised to $525 million. The round, announced in September 2025 (not March 2025), included participation from new investor DFJ Growth and returning investors including Valor Equity Partners, Founders Fund, Lux Capital, RTX Ventures, DCVC, Airbus Ventures, Spring Tide, First Principles Group, Balerion Space Ventures, Tamarack Global, and Trousdale Ventures. Impulse has secured over 30 commercial and government contracts valued at nearly $200 million, including tactical missions for the Department of Defense, a multi-launch agreement with SES, and a NASA IDIQ VADR contract. The company plans to deploy Helios in Q3 2026 and will use the new funding to scale production, expand manufacturing facilities, hire additional engineers across engineering and mission operations, and accelerate research and development for new vehicles and propulsion systems to meet surging demand across commercial, civil, and defense sectors. |
| Oct 2024 | Series B | Founders Fund (lead) | $150M | - | Impulse Space, founded by Tom Mueller (SpaceX's first employee), develops in-space transportation vehicles including the Mira and Helios orbital transfer vehicles (OTVs), which use chemical propulsion for high delta-v to reposition satellites and payloads after launch. The company operates as a logistics provider in the growing satellite market spurred by SpaceX, with products differentiated for efficient orbit adjustments, rideshare programs, and missions like LEO Express-1 and upcoming LEO Express-2. In October 2024, Impulse Space raised $150 million in a Series B funding round led by Founders Fund, with participation from Lux Capital, Spring Tide, DCVC, Airbus Ventures, RTX Ventures, Tamarack Global, and others including Alumni Ventures, Balerion Space Ventures, 137 Ventures, Elysium, First Principles Group, Island Green, Overmatch, and Trousdale Ventures. This brought total funding to $225 million following prior rounds: a $20 million seed led by Founders Fund in 2022, a $10 million note from Lux Capital, and a $45 million Series A led by RTX Ventures in July 2023. Funds will support team expansion beyond 140 employees, scaling production of Mira and Helios vehicles, R&D, and key missions including an upgraded Mira launch in 2025 and Helios debut in 2026. Operations are based at a 60,000-square-foot headquarters in Redondo Beach, California, with testing at Mojave Air and Space Port. Recent milestones include SpaceWERX STRATFI and SBIR awards, GEO Rideshare Program launch, and LEO Express-1 mission completion. A later Series C in June 2025 raised $300 million led by Linse Capital at an implied $1.8 billion valuation, but this is distinct from the queried October 2024 Series B. |
| Jul 2023 | Series A | RTX Ventures (lead); Airbus Ventures; Lux Capital; Space Capital; Alumni Ventures; Earthrise Ventures; Pallas Ventures; Founders Fund | $45M | - | Impulse Space, founded in 2021 by Tom Mueller (former SpaceX founding member), is an in-space transportation company developing orbital maneuvering vehicles for last-mile payload delivery to custom orbits. The company's product lineup includes Mira, a smaller vehicle, and Helios, a larger high-energy kick stage designed to enable direct missions to Geostationary Equatorial Orbit by bypassing the Geostationary Transfer Orbit, reducing mission complexity and cost. In July 2023, Impulse Space closed an oversubscribed Series A funding round of $45 million led by RTX Ventures (the venture capital arm of RTX Corporation), with participation from Founders Fund, Lux Capital, Airbus Ventures, Space Capital, and Pallas Ventures. The Series A funding was earmarked to accelerate development of the Helios vehicle and support multiple high-profile missions including a GEO refueling mission (LEO Express-1) planned for 2025, an on-orbit refueling demonstration with Orbit Fab, integration as the propulsion provider for Vast's private station Haven-1, and a Mars mission with Relativity Space scheduled for 2026. The company had previously raised a $20 million seed round led by Founders Fund in early 2022 and a $10 million funding deal from Lux Capital in summer 2022. |
| Mar 2022 | Seed | Founders Fund (lead); Lux Capital (lead); Green D Ventures; Alumni Ventures; Earthrise Ventures | $30M | - | Impulse Space, founded in September 2021 by Tom Mueller, a SpaceX founding member and propulsion expert, develops in-space transportation services including orbital transfer vehicles like Mira and Helios for payload delivery, satellite relocation, in-orbit servicing, space debris removal, and orbit maintenance. The company raised a $20 million seed round led by Founders Fund around March 2022, followed by a $10 million investment from Lux Capital in June 2022, rounding total recent funding to $30 million. Investors in early rounds included Founders Fund and Lux Capital, with later participation from Alumni Ventures, Earthrise Ventures, Green D Ventures, and others in subsequent rounds. The funds supported accelerated development toward agile access to any orbit. Impulse Space progressed with a $45 million Series A led by RTX Ventures in July 2023, $150 million Series B in October 2024 led by Founders Fund, and $300 million Series C in June 2025 led by Linse Capital at $1.8 billion implied valuation, bringing total raised to $525-586 million. By 2025, it had over 30 contracts worth nearly $200 million, successful missions including high-thrust tug flights, and paying customers, positioning it between Rocket Lab and Momentus in valuation context. |
Who has invested in Impulse Space?
15 investors have backed Impulse Space across its funding rounds, including Founders Fund, Lux Capital, Linse Capital, Alumni Ventures, 137 Ventures and Earthrise Ventures.
Lead investors include 137 Ventures, Banner VC, Linse Capital, Founders Fund, RTX Ventures and 1 other investor.
Impulse Space Investors
| Investor | HQ | Rounds | Role | First check |
|---|---|---|---|---|
| 4 | Lead | Mar 2022 | ||
| 4 | Lead | Mar 2022 | ||
| 3 | Lead | Jun 2025 | ||
| 2 | Lead | Jun 2026 | ||
| 2 | Participant | Mar 2022 | ||
| 2 | Participant | Mar 2022 | ||
| 2 | Lead | Jun 2026 | ||
| 1 | Lead | Jul 2023 | ||
| 1 | Participant | Jul 2023 | ||
| 1 | Participant | Jun 2026 | ||
| 1 | Participant | Jul 2023 | ||
| 1 | Participant | Mar 2022 | ||
| 1 | Participant | Sep 2026 | ||
This data is available for Pro users. Sign up to see all 15 Impulse Space investors. Start Free Trial | ||||
Benchmark 350K+ Funding Rounds and Disclosed VC Valuation Multiples
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Start Free TrialImpulse Space Competitors
Impulse Space competitors include listed companies like MDA Space, Exchange Income, China Aerospace Times and OHB, and private ones like Relativity Space and Agile Space Industries.
| Company | HQ | Status | Revenue | EBITDA | Valuation | Revenue Multiple |
|---|---|---|---|---|---|---|
| Publicly listed | $1.2B | $217M | $4.9B | 3.8x | ||
| Publicly listed | $2.3B | $534M | $4.7B | 2.4x | ||
| Publicly listed | $2.1B | $166M | $7B | 3.5x | ||
| Publicly listed | $1.4B | $141M | $4.2B | 2.3x | ||
| Private | - | - | $4.2B | - | ||
| Private | $28M | - | $8B | 285.7x |
Impulse Space Public Comps
Impulse Space is still privately-owned, but its public comps include Nanchang Sanrui, Loar Group, BETA Technologies, MDA Space, Exchange Income, Karman Space & Defense, Avic (Chengdu) Uas, OHB, China Aerospace Times and Shimadzu.
| Last FY | EV/Revenue | EV/EBITDA | ||||||
|---|---|---|---|---|---|---|---|---|
| Revenue | EBITDA | Last FY | LTM | 2027E | Last FY | LTM | 2027E | |
| $160M | $76M | 32.7x | - | 69.2x | - | |||
| $496M | $157M | 13.8x | 11.0x | 43.7x | 27.8x | |||
| $36M | ($730M) | 106.8x | 87.1x | (5.2x) | (9.7x) | |||
| $1.2B | $217M | 4.2x | 3.8x | 22.7x | 19.5x | |||
| $2.3B | $534M | 2.8x | 2.4x | 12.2x | 10.5x | |||
| $472M | $120M | 11.7x | 8.3x | 45.9x | 27.8x | |||
| $450M | $19M | 8.6x | - | 202.0x | - | |||
| $1.4B | $141M | 2.6x | 2.3x | 25.7x | 22.9x | |||
This data is available for Pro users. Sign up to see all Impulse Space competitors and their valuation data. Start Free Trial | ||||||||
Common questions about Impulse Space
| When was Impulse Space founded? | Impulse Space was founded in 2021. |
| Where is Impulse Space headquartered? | Impulse Space is headquartered in Los Angeles, CA, United States. |
| Is Impulse Space publicly listed? | No, Impulse Space is a private, VC-backed company. |
| What is Impulse Space's valuation? | Impulse Space was last valued at $5.6B in its Series D in September 2026. |
| How much funding has Impulse Space raised? | Impulse Space has raised $1.3B across 6 funding rounds. |
| What was Impulse Space's last funding round? | Impulse Space's last funding round was a $308M Series D in September 2026. |
| Who are Impulse Space's investors? | Impulse Space's investors include Lux Capital, Founders Fund, Linse Capital, 137 Ventures, Alumni Ventures, Earthrise Ventures, Banner VC, RTX Ventures, Airbus Ventures, Silent Ventures and 5 others. |
| Which companies are comparable to Impulse Space? | Companies comparable to Impulse Space include MDA Space, Exchange Income, China Aerospace Times, OHB, Relativity Space and Agile Space Industries. |
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