Asteroid Mining Companies in 2026: What Investors Can Actually Buy

In 2018, one of the most heavily backed names in commercial space quietly stopped being a company. Planetary Resources, funded by Google executives and sold to investors on a trillion-dollar vision of mining the sky, was acquired for parts. A year later, Deep Space Industries pivoted away from asteroids entirely.

The first wave of asteroid mining companies did not fail because the idea was wrong. It failed because the economics did not work at the launch costs, hardware sizes, and market structures of the mid-2010s. That is the part worth understanding, because the conditions have shifted.

Three forces have changed since 2018: the collapse in launch costs, the miniaturisation of prospecting hardware, and the emergence of in-space demand for water and propellant as a near-term revenue bridge. What follows here maps who is actually doing this work in 2026, what each company’s real business model is, and what investment exposure genuinely looks like. Treat it as a tool for calibrating expectations, not a forecast of who wins.

Why the second wave is structurally different from the first

Start with the baseline. Planetary Resources exited in 2018, Deep Space Industries followed in 2019, and both defined the outer edge of what venture-only capital could sustain against a decades-long metal-return thesis.

Three structural shifts separate the current generation from those exits:

• Launch cost compression: the price of putting payload into orbit has fallen far enough to change the underlying math.
• Sensor and spacecraft miniaturisation: prospecting hardware now fits on CubeSat-class platforms, cutting per-mission capital and risk.
• In-space markets: water and propellant for spacecraft, plus orbital debris removal, offer revenue decades before Earth-return metals are viable.

Take the launch numbers first. SpaceX advertises its Falcon 9 at roughly $2,720 per kilogram to low Earth orbit, the operational benchmark analysts now use. Projections point lower still, toward approximately $1,569 per kilogram by 2030 and around $273 per kilogram by 2040. Those are projections, not confirmed outcomes, but they set the trajectory.

University of Cambridge launch cost projections place the per-kilogram figure at approximately $273 by 2040, the same trajectory that underpins the economic case for tele-operated volatile extraction becoming feasible within the planning horizons these companies are working toward.

Miniaturisation compounds the effect. Instead of one large, expensive platform, current system-engineering models favour clusters of small, cheap spacecraft, spreading risk across many attempts rather than betting everything on one.

The third shift is the most important. The original thesis required returning platinum to Earth to make money. The current one starts with selling water and propellant in orbit, a market that exists as soon as there are customers in space to serve.

The in-space economy infrastructure that makes TransAstra’s water-and-propellant thesis commercially viable extends well beyond propellant depots; nuclear power systems for lunar and deep-space operations represent a parallel build-out that determines how quickly persistent in-space demand can materialise at the scale asteroid resource companies require.

Economic modelling suggests tele-operated extraction of volatiles becomes feasible once launch costs reach approximately $200 per kilogram, a threshold the projected cost curve approaches within the timeframe these companies are planning for.

Funding architecture has changed too. NASA Small Business Innovation Research (SBIR) contracts and listed hardware suppliers now sit alongside venture capital, rather than venture money carrying the entire load. The read for you here is straightforward: the reasons the first wave failed have measurably weakened, which is what makes the second wave worth evaluating rather than dismissing.

AstroForge and the bet on platinum-group metals

AstroForge did something the first wave rarely managed: it launched hardware. In 2023, via a SpaceX rideshare, it flew Brokkr-1, the first commercial asteroid prospecting CubeSat, targeting metallic near-Earth asteroids rich in platinum-group metals.

The funding arc tells you how quickly private capital has re-entered the space. AstroForge opened with a $13 million seed round led by Initialized Capital in 2022. Total capital raised now sits at roughly $55 million as of mid-2026.

The Series A is where the sources diverge. Late-2024 coverage reports a $40 million round led by Nova Threshold closing in August 2024, while later private-market data lists a $42.5 million deal dated 29 January 2025. Either way, the investor list is notable: 776 (Alexis Ohanian), Y Combinator, Jed McCaleb, Uncorrelated Ventures, and Caladan.

The number that matters most for the risk profile is the per-mission cost. AstroForge estimates follow-on missions at $6.5-10 million each, reportedly built in under nine months, though that build speed is unverified. If accurate, it tells you the company’s real edge is iteration speed, not any single mission outcome. A company that can fly cheap, fail, and refly is playing a fundamentally different game to one betting everything on one launch.

The mission roadmap and what comes after prospecting

The roadmap runs in sequence:

1. Brokkr-1: launched 2023, the prospecting demonstrator.
2. DeepSpace-2: in development, positioned as the first commercial rendezvous with a body outside the planetary gravity well.
3. Vestri: planned, originally targeted for 2025, with longer-term landing and refining missions beyond it.

As of September 2026, neither DeepSpace-2 nor Vestri has a publicly confirmed completed mission. Both remain in development or planning.

That gap is the critical unresolved step. Proving a rendezvous is one thing; extracting and refining material in microgravity is another entirely. AstroForge represents the clearest example of second-wave architecture, small hardware on fast cadence against a long-dated commodity thesis, but the leap from prospecting to extraction is still ahead of it. For you, the model makes the sector legible even though the company itself is private and inaccessible.

TransAstra and the near-term case for water over metals

Water ice sounds like the boring version of asteroid mining. No platinum, no trillion-dollar headlines. Yet TransAstra’s bet may generate revenue decades before any Earth-return metal mission does, and the reason is worth understanding.

TransAstra (Trans Astronautica Corporation) targets water and volatiles for in-space propellant markets, supplemented by orbital debris removal and space domain awareness. The logic is simple: propellant sold in orbit has customers now, and debris removal is a service governments already want to pay for.

That funding model is the tell. TransAstra has accumulated roughly $6.74 million across Phase I and II SBIR and STTR awards since 2017:

• 2023 NASA Phase II SBIR: $849,318 for debris remediation technology.
• 2025 NASA CCRPP award: up to $2.5 million, matched by private investor funds, for a 10-metre capture bag for large debris.
• DoD Direct-to-Phase II SBIR: reportedly two awards of $1.25 million each for Sutter telescope space situational awareness technology (unverified).

Having flight-qualified its capture bag through public funding, TransAstra signed a contract with the ISS National Lab manager (CASIS) for a demonstration inside the Bishop Airlock, originally targeted for late 2025. As of September 2026, no completion has been publicly confirmed.

The government-grant structure cuts both ways for you as an investor. It means TransAstra is de-risking its technology on public dollars, which keeps early-stage burn low. But it also means the company’s commercial milestones depend on the continuity of government programmes rather than pure market demand. That is a different risk profile to a venture chasing customers directly.

Here is how the two private players compare:

TransAstra illustrates the viable near-term path: start with the in-space economy, prove hardware on government contracts, and leave the Earth-return metal thesis for later.

TransAstra’s near-term revenue thesis depends entirely on propellant economics in orbit improving fast enough to attract commercial customers before government grant cycles expire, a dependency that makes the trajectory of in-space fuel pricing as important as any single mission milestone.

Karman Space and Defense: the only listed proxy and what it actually is

Before you form the wrong impression, correct it now. Karman Space and Defense (NYSE: KRMN) is not an asteroid mining company. Every dollar of its current revenue comes from defence and space hardware: satellite structures, launch vehicles, maritime systems, and tactical missiles. Its asteroid capability is framed strictly as optionality layered on top of a defence business, not a live programme.

That distinction matters because Karman is the only accessible way to buy structural adjacency to space resource infrastructure on a public market today. What you would actually be buying is a defence hardware company, with the asteroid angle as a call option you get for free.

The core business is growing fast. In Q1 FY2026, Karman posted revenue of $151.2 million, up 51% year-on-year, with net income of $7.8 million and a funded backlog of $1.0 billion, up 61% year-on-year. Q2 FY2026 set records: revenue of $182.1 million, net income of $14.0 million, and adjusted EBITDA of $54.6 million.

Q3 and Q4 FY2025 figures above are unverified and should be treated as indicative only.

The contract pipeline reinforces the defence story. In January 2026, Karman’s Systima facility won work under the Missile Defense Agency SHIELD programme, with a total potential value of $151 billion (this is a programme ceiling, not guaranteed revenue). In July 2026, it secured a $21.3 million contract for the Navy’s MK 54 Torpedo programme, and in January 2026 it acquired Seemann Composites, pushing into maritime defence composites.

Karman’s funded backlog of $1.0 billion anchors the point: this is a defence hardware business at meaningful scale, with asteroid capability sitting on top as optionality, not the reverse.

Valuation, leverage, and the risks that come with the premium

The premium is real. Karman carries a net debt to EBITDA ratio of roughly 3.6x to 4.4x and an enterprise-value-to-adjusted-EBITDA multiple around 28x. The stock is volatile, with a beta near 1.82 and annualised volatility around 66%.

You are paying up for growth and optionality at the same time, which compounds the risk if either disappoints. Customer concentration adds to it, and short-seller reports in mid-2026 have flagged concerns over internal controls and defence-product accounting. Those claims remain unverified.

None of that is disqualifying. It is simply the specific set of risks you accept when buying the only accessible listed proxy in a sector where the pure plays are locked behind private markets.

How to think about the 15 to 25-year commercial horizon and the risks that come with it

Here is the timeline in plain terms. Meaningful revenue from pure-play asteroid mining sits 15 to 25 years out, with some expert projections pushing regular commercial operations as far as 50 years into the future. This is a mid-century infrastructure thesis, not a commodity trade you position for next cycle.

The barriers are specific and named:

• Legal ambiguity: the Outer Space Treaty’s non-appropriation clause remains contested. US domestic law (the Commercial Space Launch Competitiveness Act) permits resource extraction, but international legal debate is unresolved and has chilled large capital commitments.
• Upfront capex scale: the sums required are enormous relative to any near-term return.
• Technical readiness gap: terrestrial extraction equipment does not work in low-gravity regolith, and microgravity handling and anchoring remain largely unproven.
• Commodity disruption paradox: flooding a roughly $660 billion global raw-materials market with space-sourced supply could collapse prices, destroying the profitability of the very missions that acquired it.
• Debris and sustainability risk: mining operations add fragments and dust to already crowded orbits.

The single most useful data point for calibrating the gap sits in one mission.

NASA’s OSIRIS-REx cost roughly $1 billion and returned 121.6 grams of asteroid material. A 2012 KISS study separately estimated $2.6 billion simply to bring a 500-ton asteroid into low Earth orbit, before any processing infrastructure.

Sit with that ratio. A billion dollars for grams tells you how far prospecting is from extraction at commercial scale.

The deep-sea mining parallel makes the point sharper. Decades of theoretical potential, unresolved regulation, environmental pushback, and a handful of small-scale proofs have still not produced a commercial industry. Asteroid mining faces the same structure, one layer further from Earth.

The deep-sea mining parallel is not the only adjacent case worth examining; lunar mining viability faces a structurally similar set of unresolved barriers, including upfront capex scale, unclear international legal frameworks, and the challenge of operating extraction equipment in low-gravity environments without terrestrial analogue data.

For a US investor, the horizon dictates the options. Your only rational near-term positions are a long-duration, illiquid venture bet or a defence-floored listed proxy. There is no middle option today, and no responsible way to model returns on a thesis this far out.

What the sector map tells investors who are paying attention now

Pull the whole map together and the choices become clear.

The three split cleanly. AstroForge is the pure-play, long-duration venture bet on platinum-group metals: private and illiquid. TransAstra is the government-backed near-term infrastructure bet on water and debris: also private and illiquid. Karman is the only accessible listed equity with structural adjacency, defence-floored and premium-priced.

The asymmetry is the whole problem. The companies closest to the asteroid mining thesis are the ones you cannot buy, and the one you can buy is primarily a defence hardware business. Anyone conflating all three as “asteroid mining exposure” is misreading the map.

Investors exploring positioning for asteroid mining before pure-play equities become accessible face a structural access problem that existing portfolio frameworks rarely account for, given that the only liquid proxy today is a defence hardware business rather than a resource extraction company.

Remember the base rate: Planetary Resources exited in 2018 and Deep Space Industries in 2019. Venture-stage asteroid companies have a track record, and it is short. The structural tailwinds are genuine and the sector is real, but the distance between what is investable today and what the thesis actually requires is the tension every investor here must resolve alone. This is a 15 to 25-year infrastructure thesis, and the investor profile it suits is narrow.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Past performance does not guarantee future results, and financial projections are subject to market conditions and various risk factors. Forward-looking statements regarding commercial timelines are speculative and subject to change based on technological, regulatory, and market developments.