This is the closing leg of the 2026 tour through small-cap defense (save for a special edition! stay tuned). Earlier installments worked the maritime and counter-drone domains, then munitions and sensors.

The premise running through all of them?

Alpha in this corner of the market is available to retail (not because the analysis is hard) because the position sizes are too small to interest the institutions that could do the work.

What’s left for the rest of us is knowing which supplier feeds which program and which technology actually ships.

This final installment groups three layers that sit behind the trigger:

The clearest demand signal of the year came out of the US/Iran war, where commercial satellites (and not government systems) delivered the first public confirmation of the opening strikes and the damage that followed.

Spatial data is now a weapon of war: high-resolution Earth observation that once lived inside classified systems is now produced and sold through commercial constellations, tracking deployments and assessing strikes in near real time.

The conflict showed both edges of that blade. Washington reportedly restricted commercial imagery over Iran to control what could be seen, while Iran reportedly reached for foreign commercial satellite networks to build its own targeting picture.

In response to the changing nature of intel gathering, Uncle Sam’s response has been to formalize its dependence on commercial capacity rather than reverse it. In fact, the Space Force just put up to $94 million behind one private company’s deployable optical sensors for space domain awareness.

In other words, we’re facing a procurement wave aimed straight at small-cap space layer.

BlackSky is the most direct pure-play small-cap space stock. It operates a constellation delivering very-high-resolution Gen-3 imagery at 35 centimeters, paired with an AI analytics platform sold on subscription basis, and the model is turning the corner.

Management projects as much as 30% net year-over-year growth for 2026 on the heels of significant backlog growth (to ~$380 million) with the company booking up to $160 million in new contracts early in 2026, including a $99 million Air Force Research Lab IDIQ and multiple international ministry-of-defense subscriptions.

Likewise, management expects its core intelligence business to grow more than 50% in 2026 at subscription gross margins around 80%.

In other words, BlackSky’s dual-use utility is baked-in: the same imagery serves commercial and government buyers, with international demand driving much of the backlog. Market cap sits around $1.1B, so continued success may push the stock into mid-cap range within the next few years.

Still loss-making, on a premium sales multiple (10x trailing/7x forward), and execution-dependent. Analysts have trimmed targets on a more gradual Gen-3 constellation rollout and ongoing defense-budget uncertainty, and at this valuation, the growth is already priced in, leaving little room for a stumble on the 2026 ramp.

Where BlackSky sells premium tasking, Satellogic sells scale and economics. It runs one of the larger high-resolution constellations in orbit and is pivoting hard toward defense: first-quarter 2026 revenue rose 80% year over year to $6.1 million, and it ended the quarter with $121.9 million in cash.

The more telling number is the model, specifically a $12 million deal to hand a sovereign defense customer a fully commissioned, in-orbit satellite from its own constellation (the second such sovereign sale in two quarters).

That is the spatial-data-as-weapon thesis turned into a product: a government buying its own orbital capacity off the shelf.

Satellogic’s planned Merlin system targets daily one-meter remapping, and a former National Geospatial-Intelligence Agency head recently joined as a strategic advisor (though such appointments are fairly par for the course and shouldn’t be a needle-mover on its own). Market cap is around $867M. The balance sheet carries meaningful convertible-note leverage and the company is still losing money, so it sits with BlackSky and our next small-cap space stock pick on the speculative end of the basket.

We covered Spire in more depth in a recent article about SpaceX’s (SPCX) IPO, but for small-cap defense stock, Spire rounds out the layer with a different sensor.

It runs a constellation collecting space-based radio-frequency data, with a Space Reconnaissance line serving defense, intelligence, and national-security customers, plus aircraft and maritime tracking and weather analytics.

Spire is a textbook dual-use data business, selling the same feeds to government and commercial buyers, and it complements the imaging names with the signals side of the picture.

Market cap sits around $720M, and like most of the small space names it has wrestled with profitability and a complicated balance sheet, making it the highest-risk seat in an already-speculative row.

The second layer is the ability to build at all. Two facts are pulling point-of-need manufacturing into defense procurement: the endurance demands of unmanned systems, and a hard line on where parts come from.

The FY2026 NDAA  barred the Pentagon from buying or using 3D printers made in or digitally connected to China, Russia, Iran, or North Korea, which turns “US-built” from a marketing line into a procurement requirement (i.e., a direct tailwind for the domestic additive names).

Velo3D is the most leveraged small-cap name to that shift, with its recent 1-year 260%+ run reflecting the new reality.

Velo makes large-format metal 3D printers assembled in the United States, and 2026 has brought a run of defense wins, including a $32.6 million Defense Innovation Unit contract under Project FORGE, an $11.5 million full-rate production order from a defense prime, and a $9.8 million five-year IDIQ supporting the Defense Logistics Agency’s parts program across all branches.

In other words, Velo3D is bagging contracts that are setting the company up to print money (pun intended) in the long run as edge manufacturing and “right to repair” initiatives take hold.

Liquidity and dilution. Velo3D cleaned up its balance sheet through a discounted private placement and by converting debt to equity, and this is still a turnaround that has to prove it can scale production profitably. The order book says demand is there, though cash burn says execution is the whole question.

Protolabs runs digital quick-turn production across CNC machining, injection molding, and 3D printing, plus a distributed manufacturing network, with aerospace and defense among its end markets.

It is more diversified and more established than the pure metal-AM names, and it offers the point-of-need production capability this series keeps pointing to, with the caveat that defense is a slice of a broader commercial business, so the read-through from any single Pentagon contract is diluted.

PRLB’s market cap sits at $1.93B, so don’t expect the small-cap manufacturing stock to stay within the small-cap band for much longer.

Power is its own constraint now. The unmanned systems driving the manufacturing story run on cells, and weight-to-endurance is increasingly the spec that decides whether a drone or a high-altitude platform is useful at all.

That has pulled a cluster of US battery names into the defense conversation, ranging from sturdy incumbents to pre-scale technology bets.

Enovix is the highest-profile name. It’s a silicon-battery maker whose MX-1 “Mission Execution” rugged drone cell is built on an architecture already deployed with South Korean defense contractors, with a Korea-built pipeline the company has put north of $130 million and skewed toward drones, plus a prior U.S. Army wearable-battery program.

First-quarter 2026 revenue was $7.6 million against more than $580 million of cash, so it has the runway. Market cap is around $1.5B.

It’s still pre-mass-production and concentrated in a handful of customers, which makes the manufacturing ramp Enovix’s entire investment case. The technology and the design wins are real, but converting them into volume at a profit is the unproven part, and the revenue base today is a rounding error against the valuation.

Ultralife is the lower-drama (and lower-cap, at just $107M) counterpart as a long-standing military battery supplier with real defense revenue rather than a story.

Its BA-5390, a workhorse military battery, won a new $5.2 million Defense Logistics Agency award last year. Ultralife stock probably won’t compound like a silicon-anode bet if the new chemistries take over, but it’s the name in the group actually selling batteries to the military today, which earns it a seat as the ballast in a volatile section, especially considering its stable 0.76 beta and modest 0.65x forward sales ratio.

The input layer runs one level deeper than the factory, into the metals the factory needs like niobium, scandium, tungsten, antimony, the magnetic rare earths. Across rare earths segments to this point, China’s dominance is the whole risk. To that end, Washington is now funding the reshoring with real money.

The trouble for a small-cap newsletter is that the market already figured this out: every credible, government-backed name has been bid clean out of small-cap range.

In other words, the thesis is right but the small-cap entry point on the proven names is gone.

What’s left in the band is earlier and far riskier. NioCorp Developments $NB ( ▲ 2.31% ), a roughly $780 million developer of the Elk Creek niobium-scandium-titanium project in Nebraska, is the clearest still-small play, and it carries genuine government interest: award of up to $10 million to build the first domestic scandium mine-to-master-alloy supply chain, a Pentagon-funded scandium-alloy program tied to Lockheed Martin’s Skunk Works, and an Export-Import Bank application advanced to independent technical review for up to roughly $800 million in debt financing.

On the latter point, things seemed to have accelerated into 2026, with the CEO reporting “more emails and more phone calls [in January 2026] than in all of 2025.” Still, no binding EXIM commitment or final decision has been made.

The catch is what makes this corner so dangerous: NioCorp is pre-construction, pre-revenue, financing-dependent, and dilutive, with no guarantee EXIM financing closes or that the mine gets built on the timeline or budget the model assumes.

Stil, for a live read on how fast post-financing repricing runs, look at what cleared last month. On May 21, the Export-Import Bank's board unanimously approved a $2.9 billion senior secured loan for Perpetua's Stibnite project under the Make More in America program, enough to fully fund the build alongside the company's cash.

Stibnite holds the only domestic antimony reserve in the country, the metal that hardens ammunition and that China has been choking off with export controls, which is why the Department of War backed the project and EXIM wrote the check.

The money becomes available once definitive documentation closes in the second half of 2026, though the board vote was the milestone the market was waiting on. Perpetua spent years as a sub-billion-dollar single-asset developer and now trades near $3 billion.

Ultimately, that is the NioCorp thesis on fast-forward: a strategic-mineral name the market treated as speculative until a government term sheet took the financing risk off the table.

Still, it’s worth saying plainly: the now-multibillion-dollar names were small and exploratory not long ago, too, and government backing is what carried them there. The upside is real, the risk is very high, the horizon is long with a mining play like NB.

The last layer is the one that makes the first one possible. Every satellite in the space-ISR section had to be lifted to orbit and moved once it got there, and propulsion is where the defense-space buildout is most forward-looking and hardest to play in clean small-caps. The pattern from the rest of this piece repeats: the scaled, profitable propulsion name has already outgrown the category.

Karman (KRMN), which makes propulsion, payload-protection, and interstage systems for hypersonics, missile defense, and space launch, runs around $470 million in revenue, is profitable, and carries a record backlog, and trades as a $6B-plus large-cap. It’s the proof that the demand is real and investable, and while the small-cap cohort underneath it is earlier and speculative, propulsion is a very real and very overlooked segment across small-cap defense stocks.

Starfighters Space is the most differentiated bet in the group. It operates what it calls the world’s only flight-ready fleet of F-104 MACH 2+ supersonic aircraft, flying out of Kennedy Space Center, and it’s building those jets into STARLAUNCH, an air-launch platform for small satellites and a testbed for hypersonic flight.

The thesis is that air-launch and reusable high-Mach flight sidestep the cost and cadence problems of vertical rockets for certain payloads and test missions.

FJET is set to join the Russell 3000 later this month, which matters less as a milestone than as a visibility event: index funds now have to know the ticker exists. Market cap is around $220M.

Almost everything is still ahead of it. STARLAUNCH isn’t operational, there’s effectively no revenue yet, and the stock has been violently volatile, spiking above $30 within days of its December IPO and having since given back the bulk of it.

A resale registration adds dilution overhang, and the usual post-IPO shareholder-suit fishing has attached to the name, which says more about the share-price round-trip than about the company. This is a concept you’re underwriting, not a business.

Momentus is the closest thing to a pure-play on propulsion technology itself. Its Vigoride orbital service vehicle moves satellites once they reach space using a microwave-electrothermal thruster that runs on solar power and water as propellant. Vigoride-7 launched in March 2026 and has hosted payloads for DARPA and NASA while demonstrating next-generation hardware, including an additive-manufactured fuel tank built with Velo3D, which is the whole industrial chain of this piece in a single component.

The thesis is genuine, though the financials are brutal. This is a micro-cap around $150M on roughly $4 million of trailing revenue, kept alive by near-constant equity raises, and the dilution is relentless.

Momentus flies real hardware and holds real government contracts, which is more than most names this size can claim, but it’s a technology story trading on survival economics, and only the highest-risk sleeve should be anywhere near it.

A few things over the next several quarters will tell you whether these theses are converting:

Commercial-space contracts: whether the post-Iran-war demand turns into multi-year commercial awards from the Space Force and allied defense ministries. Backlog growth at BlackSky, Satellogic, and Spire is the cleanest tell.

Domestic-manufacturing flow: whether the NDAA’s US-built requirement and push toward right-to-repair actually routes Pentagon volume to domestic additive suppliers, which would show up first in Velo3D’s DLA and DIU follow-on orders.

Critical-minerals financing: whether EXIM closes on NioCorp's Elk Creek loan. The bank just approved $2.9 billion for Perpetua's Stibnite project in May, the exact catalyst that repriced MP, Almonty, and the rest from exploratory to multibillion. A NioCorp term sheet would be the cleanest tell the next domestic name is in line for the same.

Propulsion proof points: STARLAUNCH progress at Starfighters and Vigoride cadence and contract conversion at Momentus (and whether the broader space-stock tape holds, since the whole cohort sold off on a single high-profile launch failure in late May).

Thanks for following along thus far! While this is the end of our “formal” small-cap defense stock series, we have a handful of hot tickers that didn’t quite fit cleanly into any of the discrete baskets we discussed over the past few weeks. Keep an eye on your inbox over the next few days for a special edition, small-cap defense stock grab bag of some of the coolest (and quirkiest) tickers on the cutting edge of defense tech.

Hit reply with thoughts, corrections, or names worth a closer look. If you’re seeing this outside of your inbox, shoot me an email here. Keep digging, and see you next time.

Read the rest of the series: