What are the top space economy startups by total funding raised?

Top startups in the Space economy ranked by total funding raised

Here is an updated table that ranks the top startups in the Space economy based on the total amount of funding they have raised to date.

The table also includes the total number of funding rounds, the date and size of the latest round, the financing type (e.g. Series A, equity financing), key investors, the startup’s current status (active, IPO, acquired, or shut down), and a confidence score based on the data collected.

If you need to dig deeper and get more detailed data, please check our report covering the Space economy.

SpaceX is currently in a funding category of its own, while Stoke Space and Sierra Space lead the next group of heavily funded independent space companies.

SpaceX's cumulative equity funding is now roughly $96 billion under our reconstruction, largely because its public listing added about $85.7 billion of gross equity proceeds. Below SpaceX, the scale drops sharply. OneWeb accumulated billions of dollars of equity before becoming part of Eutelsat Group, while Stoke Space has now disclosed $2.3 billion of total capital raised and Sierra Space says it has received more than $2 billion of investment since becoming an independent company.

Several companies then sit around the $1 billion to $2 billion range. AST SpaceMobile has repeatedly tapped public equity markets. Firefly Aerospace raised substantial private capital before its IPO and has since returned to the market for more equity. Relativity Space raised around $1.3 billion during its private funding history. ICEYE, Impulse Space, K2 Space and Astranis have also moved into or around the billion-dollar funding class.

The ranking is much more top-heavy than most startup markets. Our top 20 account for roughly $124 billion of cumulative funding under the broad figures in the dataset, and SpaceX represents close to four-fifths of that amount. Removing SpaceX gives a clearer picture of the actual startup field: dozens of companies have still raised hundreds of millions of dollars, and several private businesses have crossed the billion-dollar mark.

Company	Approx. cumulative funding in our dataset	Current status
SpaceX	$96.1B	Public
OneWeb	$6.2B historical total in dataset	Part of Eutelsat Group
Stoke Space	$2.3B	Private
Sierra Space	$2.0B+	Private
AST SpaceMobile	~$2.1B	Public
Firefly Aerospace	~$1.9B	Public
Relativity Space	~$1.3B	Private
Impulse Space	~$1.3B	Private
ICEYE	~$1.2B	Private
K2 Space	~$1.0B	Private

How far ahead of every other space startup is SpaceX?

SpaceX's funding lead is enormous: its public offering alone raised more equity than the rest of the companies in our top 20 have raised together.

SpaceX sold roughly 639 million Class A shares when its IPO closed, generating about $85.7 billion in gross proceeds. Add the private equity raised during the company's long pre-IPO history and cumulative equity funding comes close to $100 billion.

Compare that with Stoke Space at $2.3 billion, Sierra Space above $2 billion and ICEYE around the billion-dollar level. Even combining several of today's best-funded private space companies barely changes the scale of the comparison.

The gap has also widened very recently. Before SpaceX went public, comparing SpaceX with companies such as Stoke, Sierra or Relativity was at least conceptually a comparison between privately funded aerospace companies. Today, SpaceX can raise capital from the public market on a completely different scale.

Which private space startup has raised the most funding?

Stoke Space is currently one of the strongest candidates for the most heavily funded independent private space startup, with $2.3 billion of disclosed capital raised.

Stoke's latest Series E brought in $1 billion. According to the company's announcement, Point72 Ventures and Spark Capital co-led the financing, with General Innovation, Glade Brook Capital, Washington Harbour Partners, Woven Capital and Y Combinator among the other participants.

The number is striking because Stoke has not yet built a long commercial launch record. Its Nova Pathfinder vehicle is still preparing for its first orbital flight, currently targeted for the first part of 2027. Investors are financing the manufacturing system, launch infrastructure and development of a larger Nova vehicle before Stoke has demonstrated recurring orbital launches.

Sierra Space is very close in cumulative funding. The company says more than $2 billion has been invested since 2021, including a recent $550 million Series C.

The answer depends slightly on how we define a "startup." If we exclude public companies and acquired businesses, Stoke and Sierra Space are currently the clearest names at the top.

Why did investors put another $1 billion into Stoke Space?

Investors are backing Stoke Space as a potential large-scale reusable launch company, and the latest $1 billion round shows how expensive that bet has become.

Stoke is developing Nova around full and rapid reusability, including recovery of the upper stage. Its first configuration, Nova Pathfinder, is designed to demonstrate those technologies in orbit. The company has also unveiled Nova Block 2, a much larger vehicle targeting roughly 15 tonnes of payload capacity.

The financing goes well beyond getting one experimental rocket to orbit. Stoke says it will use the money to expand launch and production capacity while accelerating the larger vehicle.

That is a very different funding model from the small-launch playbook that dominated much of the previous startup cycle, when companies often tried to reach orbit with a relatively small rocket and scale later.

How much funding has Sierra Space raised?

Sierra Space has attracted more than $2 billion of investment since becoming an independent company, including a $550 million Series C that valued it at $8 billion.

The latest round was led by LuminArx Capital Management. Sierra Space said the new money would help increase production and expand its national-security business.

Sierra Space became widely known for Dream Chaser, its reusable spaceplane, and for plans around commercial space stations. Those projects remain important, but national-security programs now play a much bigger role in how Sierra presents its growth story to investors.

The $550 million round also puts Sierra among a fairly small group of private space companies capable of raising half a billion dollars in one transaction.

Its funding profile increasingly looks like that of a major defense and aerospace company being built in private markets, rather than a conventional venture-backed startup.

Is ICEYE now one of the best-funded space startups?

ICEYE has clearly entered the top tier of private space companies after raising $520 million of new Series F equity at a valuation above $12 billion.

The Finnish satellite company actually announced a transaction worth more than €1 billion when secondary share sales are included. For cumulative funding comparisons, however, the relevant part is the €450 million, or roughly $520 million, of new primary capital going into ICEYE itself.

General Atlantic led the round. Solidium, Tesi, Finnish pension funds, Nokia, Qatar Investment Authority and TCV also participated.

ICEYE's scale is particularly interesting because the company operates synthetic-aperture radar satellites rather than launch vehicles or giant broadband constellations. Its growth is tied heavily to defense, intelligence and sovereign satellite demand.

According to ICEYE, seven European governments had already purchased sovereign satellite systems by the time of the round.

How big has Impulse Space become?

Impulse Space has quickly become one of the most heavily funded in-space transportation companies, with its Series D alone reaching $808 million.

The round first closed at $500 million and was later extended by another $308 million. Existing investors including 137 Ventures, BANNER VC, DFJ Growth, Linse Capital, Lux Capital and Valor Equity Partners participated in the extension.

Impulse builds spacecraft that move payloads after launch. That sounds like a narrower market than rockets or satellite broadband, but the financing suggests investors see orbital mobility becoming a much larger infrastructure layer.

As SpaceX, Rocket Lab, Stoke and other launch companies put more hardware into orbit, more customers need spacecraft capable of changing orbit, reaching higher-energy destinations or moving payloads quickly after initial deployment.

Which satellite manufacturers are raising the most money?

K2 Space, Apex, Astranis and Sierra Space are attracting unusually large amounts of capital because investors increasingly expect satellites to be produced at industrial scale.

K2 is the most dramatic recent example. The company raised $250 million in a Series C at a reported $3 billion valuation, then followed with a $500 million Series D at $6.8 billion. K2 says it has secured more than $1 billion in contracts and is building capacity for as many as 100 large satellites per year.

Apex has taken a similar factory-oriented approach. Its latest funding brought in more than $200 million and valued the company at $2.3 billion, nearly double its earlier billion-dollar valuation. Apex is building standardized satellite buses that can be configured for different missions rather than engineering every spacecraft from scratch.

Astranis also sits in this group, although its headline financing needs to be read carefully. Its recent announcement described $450 million of new capital, but only $300 million was Series E equity. The remainder was a credit facility of up to $155 million. For an equity-funding ranking, we count the equity portion rather than adding the debt facility to the total.

All three companies are selling investors a similar idea: satellites can move from bespoke aerospace projects toward repeatable manufactured products.

Company	Recent equity round	What investors are financing
K2 Space	$500M Series D	Large high-power satellite production
Apex	$200M+ growth equity	Standardized satellite buses at high production rates
Astranis	$300M Series E	Small GEO and high-orbit spacecraft
Sierra Space	$550M Series C	Space systems and national-security production
ICEYE	~$520M Series F	SAR satellites and sovereign intelligence
CesiumAstro	$270M Series C	Space communications payloads and satellites
Albedo	$100M Series B	Very-high-resolution Earth imaging
Starfish Space	$110M Series B	Satellite servicing spacecraft

What are the biggest recent space startup funding rounds?

Several space companies are now raising $300 million to $1 billion at a time, which would have been exceptional even for a leading space startup only a few years ago.

Stoke Space's $1 billion Series E is the clearest private-company example. Impulse Space's Series D reached $808 million after its extension. Sierra Space raised $550 million, ICEYE raised roughly $520 million in primary Series F capital, and K2 Space raised $500 million.

Astranis added $300 million of Series E equity, while Isar Aerospace raised €270 million in its Series D. Apex secured more than $200 million of growth equity.

Public companies have raised even larger sums. SpaceX's IPO generated approximately $85.7 billion in gross equity proceeds. York Space Systems sold $629 million of stock in its IPO. HawkEye 360 sold 16 million IPO shares at $26 each, and Firefly Aerospace returned to the public market after its own IPO for another primary equity raise.

Company	Financing	Approx. new equity
SpaceX	IPO	$85.7B gross
Stoke Space	Series E	$1.0B
Impulse Space	Series D total	$808M
York Space Systems	IPO	$629M gross
Sierra Space	Series C	$550M
ICEYE	Series F primary	~$520M
K2 Space	Series D	$500M
HawkEye 360	IPO	~$416M gross
Astranis	Series E	$300M
Isar Aerospace	Series D	€270M
Apex	Growth equity	$200M+

Are giant space funding rounds becoming normal, or is the money just concentrating in a few winners?

Nine-figure space rounds are becoming much more common at the top of the market, but the biggest checks are increasingly concentrated in a small group of companies.

Seraphim Space's latest investment tracker measured about $23 billion of private SpaceTech investment over the trailing twelve months through the second quarter, compared with $9.7 billion in the equivalent period one year earlier. It counted 620 deals during that period.

Yet a handful of financings absorbed a huge amount of that capital. Stoke raised $1 billion, Impulse's Series D reached $808 million, Sierra Space raised $550 million, ICEYE raised about $520 million of primary equity and K2 raised $500 million. Those five financings alone represent more than $3.3 billion.

The market is still broad enough to support hundreds of deals, but later-stage funding is highly concentrated. Billion-dollar rounds remain rare; $200 million to $500 million rounds have become a regular feature among the strongest companies.

Are investors putting more money into rockets or satellites?

Satellite infrastructure currently gives investors more ways to deploy large amounts of capital, although launch companies still attract some of the biggest individual checks.

Stoke's $1 billion Series E keeps launch near the top of the funding table. Relativity Space previously raised about $1.3 billion. Isar Aerospace added €270 million recently, while Chinese launch companies including iSpace and Galactic Energy have attracted hundreds of millions.

Satellite businesses, however, appear throughout the ranking. Sierra Space has received more than $2 billion of investment. ICEYE is around the billion-dollar funding level. K2, Astranis and Apex have all raised huge rounds, while CesiumAstro, Loft Orbital, Albedo, Pixxel, Muon Space and others have also attracted substantial capital.

The opportunity is broader because "satellites" now covers several very different businesses: communications, Earth observation, defense intelligence, standardized buses, navigation and sovereign satellite systems.

Launch remains one of the most capital-intensive bets in the industry. Satellite infrastructure simply gives investors more companies and more business models to fund.

Who are the biggest investors in space startups?

The largest space rounds are increasingly funded by a mix of venture firms, growth investors, sovereign funds and large institutional asset managers.

Stoke's billion-dollar round was co-led by Point72 Ventures and Spark Capital. K2's $500 million Series D brought in Kleiner Perkins, ICONIQ, CapitalG, Lightspeed, Altimeter, Spark and other large technology investors.

Astranis has attracted Franklin Templeton, Andreessen Horowitz, BlackRock affiliates, Baillie Gifford and Fidelity-linked capital. ICEYE's latest round combined General Atlantic with Finnish public investors and pension institutions, Nokia and Qatar Investment Authority.

Sierra Space's latest financing was led by LuminArx Capital Management, while Apex brought in Glade Brook Capital and Washington Harbour Partners.

Specialist space funds still matter, particularly at earlier stages, but companies raising $300 million, $500 million or $1 billion generally need investors that can write much larger checks.

Public capital is becoming another important piece. SpaceX, Rocket Lab, AST SpaceMobile, Planet, Firefly, HawkEye 360 and York Space Systems can now raise equity from public investors rather than relying entirely on private funding rounds.

Is defense driving today's biggest space funding rounds?

Defense and sovereign demand are currently one of the clearest reasons investors are willing to fund space companies so aggressively.

ICEYE's latest financing is the cleanest example. The company tied the round directly to sovereign intelligence demand and said seven European governments had already purchased sovereign satellite systems.

Sierra Space also described national-security production as a major use of its latest $550 million round. Apex is expanding spacecraft production partly for U.S. government missions. K2 is working across defense and commercial programs. HawkEye 360 sells radio-frequency intelligence to governments and defense customers.

Recent public-company numbers show the same pattern. HawkEye 360 reported quarterly revenue of $49.8 million, up 87% year over year, alongside a backlog above $290 million. Firefly reported $117.7 million of quarterly revenue and continues to add defense work alongside its lunar, launch and spacecraft businesses.

How did K2 Space raise so much money so quickly?

K2 Space has gone from a young satellite startup to roughly a billion dollars of funding at remarkable speed.

The company was founded in 2022 and raised $250 million in a Series C at a reported $3 billion valuation before following with a $500 million Series D at $6.8 billion. Its valuation therefore more than doubled between those two large rounds.

K2's pitch is built around large, high-power satellites. For years, space startups often focused on making spacecraft smaller because launch capacity was expensive. K2 is betting that cheaper, more available launch changes that equation and makes very capable large satellites economical again.

The company has also said it has secured more than $1 billion in contracts. That commercial evidence gives investors more than an engineering roadmap to work with.

K2 is funding both technology and a factory. It wants to manufacture as many as 100 large satellites per year, a production rate that would have sounded extremely aggressive for a startup only a few years ago.

How much equity has Astranis actually raised?

Astranis has raised more than $1 billion of capital overall, but its cumulative equity total is lower than the headline figure because the latest financing also includes debt.

Astranis announced $450 million of new capital in its latest financing package. The company broke that into a $300 million Series E and a delayed-draw credit facility of up to $155 million from Trinity Capital.

For our ranking, those two amounts should not be treated as the same thing. The Series E increases cumulative equity funding. The credit facility does not.

This is one of those cases where database totals can drift apart. One source may report "total capital raised," another may show only venture equity, and another may add debt facilities because they were announced alongside the round.

Astranis nevertheless remains one of the best-funded satellite startups. Its earlier equity rounds plus the latest $300 million Series E place it around the billion-dollar range even after we strip out the credit facility.

The financing also shows strong investor depth. Snowpoint Ventures and Franklin Templeton co-led the Series E, with Andreessen Horowitz, BlackRock-affiliated funds, Baillie Gifford and Fidelity Management & Research among the participants.

Is Europe finally producing billion-dollar space startups?

Europe now has several seriously well-funded space companies, led by ICEYE, although the United States still produces more companies at the very top of the funding table.

ICEYE is the standout. Its Series F valued the Finnish company above €10 billion and brought in €450 million of primary equity.

Germany's Isar Aerospace has also accumulated substantial private capital and recently added €270 million in Series D funding. Open Cosmos, D-Orbit, Exotrail and several other European companies have raised sizeable rounds, while PLD Space has built one of Europe's best-funded private launch programs.

European governments increasingly treat launch access, satellite intelligence and secure communications as strategic infrastructure. Isar explicitly described sovereign access to space for Europe, NATO countries and allies as part of the rationale for its new financing. ICEYE is selling sovereign satellite systems directly to European governments.

That is creating the kind of large domestic customer base European startups often lacked in earlier years.

Europe still has fewer privately financed companies in the $1 billion-plus funding class than the United States, but the gap in commercial-space financing is much less stark than it used to be.

How much money is going into Chinese commercial space companies?

China has created several heavily funded private launch companies, although reconstructing their exact cumulative equity totals is harder than it is for most U.S. companies.

Galactic Energy provides one of the clearest examples. Its Series D raised roughly RMB 2.4 billion, equivalent to about $337 million at the time. The investor group included the Beijing Commercial Aerospace Fund and several regional industrial investors.

iSpace has also raised repeated large rounds and appears around the billion-dollar level in several current funding datasets, although the public record is less clean. Individual tranches, Chinese-language disclosures and different treatments of strategic financing can produce different totals.

The investor mix is also unusual by U.S. standards. Local government funds, industrial-policy vehicles and state-linked institutions frequently invest alongside conventional private capital.

Direct comparisons with Silicon Valley venture funding are therefore imperfect. Still, Chinese launch companies are being financed at a scale large enough to pursue serious industrial programs rather than small experimental ones.

Did the SPAC boom permanently change space funding?

The SPAC boom gave several space companies hundreds of millions of dollars at once, and its effects are still visible even though many of those stocks later struggled.

Rocket Lab received roughly $777 million in gross proceeds when its merger with Vector Acquisition closed. Planet obtained another major cash injection through its de-SPAC transaction. Astra also accessed hundreds of millions through the public markets.

Their later paths were very different. Rocket Lab used the capital to expand beyond Electron into space systems and Neutron. Astra struggled with launch failures, cash pressure and a collapsing stock price before its founders took the company private at $0.50 per share. Planet survived the difficult post-SPAC period and remains public.

The SPAC cycle showed that access to several hundred million dollars could extend a company's runway. It could not compensate for weak execution.

Does raising more money mean a space startup is more successful?

Funding tells us how much capital investors were willing to provide, but it can be a terrible shortcut for measuring whether a space company actually succeeded.

Astra is the obvious warning. The company raised large amounts of capital, entered the public markets at a multibillion-dollar valuation and still ended up being taken private for $0.50 per share.

OneWeb accumulated billions of dollars of investment, went through Chapter 11, was rescued by a consortium led by the UK government and Bharti, and eventually became part of Eutelsat Group.

Rocket Lab presents almost the opposite case. Its 2021 public transaction generated $777 million of gross proceeds, and the company subsequently built a much larger space-systems business alongside Electron and Neutron.

Recent public results now give us better ways to judge these companies than funding totals alone. Firefly reported quarterly revenue above $117 million. HawkEye 360 reported nearly $50 million. York Space Systems reported quarterly revenue above $90 million after going public. Rocket Lab has reached hundreds of millions of dollars of quarterly revenue and billions of dollars of backlog.

Funding still matters because space hardware consumes enormous amounts of cash before reaching scale. It just should not be confused with commercial execution.

Which heavily funded space startups have already been acquired or absorbed?

OneWeb and Astra show how dramatically a company's status can change after it raises hundreds of millions or billions of dollars.

OneWeb emerged from bankruptcy after the UK government and Bharti Global each committed $500 million. More investors followed, including Eutelsat, SoftBank and Hanwha. In 2023, OneWeb completed its combination with Eutelsat and now operates inside Eutelsat Group.

Astra took a different path. The company entered the public market during the SPAC boom but eventually returned to private ownership when its founders completed a take-private transaction in 2024.

Farther down the wider ranking, other well-funded space startups have also been acquired. Lockheed Martin acquired Terran Orbital. Capella Space was acquired after raising substantial venture funding. Spaceflight also changed hands after building a satellite-launch-services business.

Historical fundraising remains relevant after a company stops being independent, but its status has to sit next to the funding number. Otherwise the ranking quickly becomes misleading.

Are space startups getting better access to IPO money now?

Public equity has clearly reopened as a serious funding route for space companies, with SpaceX, York Space Systems and HawkEye 360 adding major IPOs to the existing public-space group.

SpaceX transformed the scale of the market with approximately $85.7 billion of gross IPO proceeds.

York Space Systems sold 18.5 million shares at $34 in its IPO, raising $629 million gross. Its SEC filings also show that the company had raised additional private preferred equity before listing, which means using the IPO alone as York's cumulative funding figure understates its historical equity financing.

HawkEye 360 sold 16 million IPO shares at $26, implying approximately $416 million in gross proceeds before expenses. The company later reported $437.5 million of net IPO proceeds after accounting for the full transaction structure disclosed in its results.

Firefly Aerospace had already reopened the door earlier. Its upsized IPO sold more than 19 million shares at $45, followed by another public offering in which Firefly itself sold four million new shares at $48.

The newer IPO cohort also has real operating businesses behind it. York has meaningful revenue and backlog. HawkEye 360 is growing government intelligence revenue. Firefly combines launch, spacecraft and lunar programs.

That gives the current wave a different foundation from the earlier period when some companies could enter public markets mainly on long-range forecasts.

Is SpaceX hiding how much money the rest of the space market is raising?

SpaceX makes every funding chart look absurdly concentrated, but the space market underneath it is currently raising plenty of money on its own.

Using the broad figures in our dataset, the top 20 companies have raised roughly $124 billion. Remove SpaceX and we are still left with close to $28 billion across nineteen businesses.

The private-market data point in the same direction. Seraphim's latest tracker recorded about $23 billion of SpaceTech investment over twelve months and 620 deals. That was more than twice the capital recorded in the comparable previous period.

The composition is also becoming more diverse. Large rounds are going into launch through Stoke and Isar, radar intelligence through ICEYE, satellite platforms through K2 and Apex, high-orbit communications through Astranis and orbital transportation through Impulse.

SpaceX distorts the scale of the ranking, but it does not explain the broader funding boom. There is a very large market underneath it.

What kinds of space startups attract the most funding today?

The biggest checks currently go to companies building expensive infrastructure with a believable path to recurring government or commercial demand.

Reusable launch remains one major category. Stoke, Relativity, Isar, Galactic Energy and iSpace have collectively raised billions.

Satellite manufacturing is another. K2, Apex, Astranis, Sierra Space and CesiumAstro have all attracted large rounds because customers want more spacecraft and investors believe production can become increasingly standardized.

Intelligence has become a third major funding pool. ICEYE and HawkEye 360 are selling capabilities that governments already buy at meaningful scale.

Orbital transportation is emerging quickly as well. Impulse Space's $808 million Series D would have been difficult to imagine for an in-space mobility company during the previous funding cycle.

The common thread is recurring infrastructure. Investors are putting much larger amounts behind companies that can repeatedly manufacture spacecraft, launch payloads, operate satellite networks or sell strategic data, rather than businesses built around a single mission.

So what does the space startup funding ranking really show?

The ranking shows a space economy with one gigantic outlier at the top and a surprisingly deep group of billion-dollar-funded companies underneath it.

SpaceX is unquestionably the largest equity fundraiser in the sector today. Its IPO pushed cumulative funding to a level no startup-style comparison can realistically match.

The more useful finding sits below SpaceX. Stoke has reached $2.3 billion of capital. Sierra Space has received more than $2 billion of investment. ICEYE, Impulse, K2, Astranis and several others are now around the billion-dollar funding level or heading toward it. Companies raising $200 million to $500 million in one round are no longer rare at the top end of the market.

We also see where the money is going. Reusable launch, satellite manufacturing, defense intelligence, sovereign communications and orbital transportation dominate the largest recent financings. Government demand appears repeatedly across those categories.

Private space has moved well beyond the era when a $100 million round automatically made a company exceptional. The best-funded companies are now raising the kind of capital required to build factories, launch infrastructure and complete satellite networks.

That does not mean every heavily funded company will succeed. OneWeb and Astra already showed how badly large financing histories can end. But the scale of capital available to the strongest space companies has clearly changed.