Golden Dome, missile defence and small-cap satellite stocks (PL, BKSY, SATL)

1. Why everyone is suddenly talking about satellites again

If you look at equity flows since mid-2025, one of the quiet undercurrents has been a rotation into what you could call “strategic infrastructure”: defence primes, missile defence, cyber, and – more and more – the small-cap companies that put eyes and ears in orbit. The discussion around a U.S. “Golden Dome” missile-defence shield and the rapid build-out of the Space Development Agency’s tracking constellations have pushed space back into the centre of the geopolitical chessboard.

The logic is simple: if you want to intercept hypersonic glide vehicles, cruise missiles and ballistic threats in time, you need continuous, overlapping coverage from space. Ground-based radars and legacy early-warning satellites are not enough when the threat profile includes swarms, manoeuvrable warheads and cheap decoys. You need a mesh of low-Earth-orbit (LEO) platforms that can see, listen, and feed targeting data into the fire-control chain in real time.

On paper, the Golden Dome vision is huge: a multi-layered shield using space-based sensors and weapons, whose cost projections range from roughly 170 billion dollars for a minimal configuration to well above 500 billion for a fully scaled system over two decades. The politics will be messy, the timelines will slip, and the technology will evolve. But if even a fraction of that capex turns into concrete programmes, it will require an industrial base capable of building, operating and continuously refreshing constellations of small satellites – far beyond what the traditional primes can absorb alone.

2. SDA, tracking layers and the demand side of the story

The most concrete expression of this shift is the work of the U.S. Space Development Agency (SDA). In December 2025 the SDA awarded roughly 3.5 billion dollars in fixed-price contracts to four companies to build 72 infrared tracking satellites for its Tranche-3 Tracking Layer, with deployment targeted for 2029. These satellites will form part of a proliferated LEO constellation designed to deliver missile warning, missile tracking and eventually fire-control-quality data for missile defence systems.

This is layered on top of earlier tranches already in motion. The agency’s concept is to refresh the constellation every two years, constantly inserting improved sensors, processing and communications hardware. That implies a recurring demand for platforms, payloads and – crucially – the software and analytics that turn data into decisions. Even if you assume aggressive budget fights on Capitol Hill, the direction of travel is clear: more eyes in orbit, higher refresh rates, and an architecture that looks a lot more like a commercial cloud than a traditional “one-off” defence satellite.

For investors, the message is not “everything related to space goes up”. The big primes will capture chunky hardware awards; launch providers will fight for manifest share; and dozens of start-ups will never scale. But inside this noisy ecosystem there is a narrower subsector that stands directly in the path of the Golden Dome and SDA trends: companies that can deliver high-revisit optical imagery, analytics and tasking infrastructure, often under subscription contracts with defence and intelligence customers.

This is where three small-/mid-cap names stand out as potential, conditional beneficiaries over the next cycle: Planet Labs PBC (PL), BlackSky Technology Inc. (BKSY) and Satellogic Inc. (SATL). They are not the only players in the game, and nothing is guaranteed. But each occupies a slightly different niche in the same flow of work and contracts that the Golden Dome/SDA narrative is likely to generate.

3. Planet Labs PBC (PL) – the global “daily feed” of the planet

Planet Labs PBC (PL) sits at the higher end of the group in terms of scale and diversification. Its core business is deceptively simple to describe: an always-on, high-revisit imaging layer of the entire Earth, served as a subscription data product. Under the hood, that means hundreds of satellites, a complex ground segment and a software stack that lets customers query, task and analyse imagery as easily as pulling data from a cloud API.

Historically, Planet has been associated with agriculture, climate, insurance and mapping use-cases. But over the last few years defence and intelligence customers have become a growing pillar of the story. The company’s “Strategic” segment – which includes national security clients – has been one of the fastest-growing lines, and a key reason why backlog and remaining performance obligations have ramped so aggressively.

By the third quarter of fiscal 2026, Planet was reporting record quarterly revenue above 80 million dollars, roughly one-third year-over-year growth, and a backlog north of 700 million dollars. The company already achieved its first quarter of positive adjusted EBITDA back in fiscal 2025, showing that the model can scale towards profitability if growth investment is managed with some discipline.

Where does this plug into the Golden Dome/SDA theme? Not by building missile-tracking sensors – that work is going to specialist primes – but by providing the wide-area, day-to-day situational awareness that complements dedicated defence constellations. Think of:

• Monitoring missile fields, air bases and naval facilities for physical changes, construction and dispersal patterns.
• Tracking logistics lines that feed conventional forces before and during a crisis.
• Feeding models that correlate what the tracking layer “sees” in infrared with what commercial optical satellites observe on the ground.

In that sense, Planet is part data provider, part “infrastructure stock” for the new space-based defence architecture. The more governments move towards continuous, software-driven targeting cycles, the more valuable a dense commercial imaging archive becomes – not just as pictures, but as labelled training data for AI models that need to understand what a missile battery or mobile launcher looks like under different conditions.

4. BlackSky Technology Inc. (BKSY) – tactical tasking and JADC2 flavour

BlackSky Technology Inc. (BKSY) is smaller than Planet but positioned more explicitly on the tactical end of the spectrum. Its proposition is not just “imagery”, but high-frequency revisits, low latency from tasking to delivery and deep integration with military command-and-control networks. The company operates its own constellation and sells access under subscription models, often bundled with analytics and alerting services.

One of the core pillars of the BlackSky story is its long-term contract with the U.S. National Reconnaissance Office (NRO) under the Electro-Optical Commercial Layer (EOCL) programme. The EOCL deal is a 10-year framework, and BlackSky secured a one-year extension into mid-2026 that not only preserves revenue visibility but also funds feature upgrades and ground-segment enhancements. That extension is a strong signal that its imagery has been judged operationally useful.

In parallel, BlackSky has been pushing into the Joint All-Domain Command and Control (JADC2) space, securing a U.S. Navy contract to develop advanced optical inter-satellite links for its Gen-3 architecture. The idea is to move imagery and tasking data around the constellation itself, reducing reliance on ground stations and making it easier to support time-sensitive operations in contested environments.

In a Golden Dome world, where missiles may have to be engaged in the boost or mid-course phase within minutes, this “tactical speed” matters. While true missile tracking will be done by dedicated infrared sensors, a company like BlackSky can provide:

• Rapid confirmation of launch sites and support infrastructure before and after an event.
• On-demand collections over suspected mobile launchers, decoy sites or logistics hubs.
• Highly taskable imagery flows integrated into mission systems and targeting cells.

Put differently, BlackSky tries to occupy the niche where commercial satellites behave as if they were part of a classified tasking architecture, without actually being classified assets. That is a narrow, high-beta niche – contract wins matter, execution missteps are punished – but it is directly aligned with how the U.S. and allies say they want to fight in the 2030s.

5. Satellogic Inc. (SATL) – sovereign, AI-first Earth observation

Satellogic Inc. (SATL) is a smaller, more volatile name, but strategically interesting in the context of how allies and partners might plug into a Golden Dome-like ecosystem. The company has built a constellation focused on high-resolution optical imagery and, in 2025, started to pivot harder towards what it calls “sovereign, AI-first Earth observation”: custom constellations and satellite platforms sold directly to governments that want their own dedicated capabilities.

The flagship of this push is a “NextGen” satellite platform offering 30-centimetre-class resolution, on-board AI processing and a more modular bus that can be tailored around a specific mission. Instead of only selling imagery, Satellogic increasingly pitches end-to-end solutions: designing, building and operating small constellations on behalf of a government customer, with data sovereignty and tasking fully under national control.

In a Golden Dome scenario, that matters for two reasons. First, the U.S. will not build this architecture alone; it will lean on allies in Europe, Asia and the Middle East. Many of those partners will not be allowed into the most sensitive U.S. programmes, but they will want their own satellites that can plug into a broader picture. Second, the volume of work – designing and refreshing dozens of small constellations – may be too fragmented and politically sensitive for the big primes to capture efficiently.

Satellogic, if it executes, could live in that “long tail”: smaller, sovereign programmes where a defence ministry wants a handful of satellites built and flown under its own flag, with AI-heavy analytics layered on top. That is riskier than a big U.S. framework contract, but it is directly aligned with the way many middle-sized countries are thinking about space – as a domain where they need at least some independent sensing, even if they still rely on U.S. architectures for missile warning and interception.

6. Radar view – three small-cap names on the same theme

None of these companies is a direct, pure-play Golden Dome contractor. They are not building the missile-tracking infrared payloads, nor are they likely to be prime integrators on multi-billion-dollar tranches. But they all sit in the same current: a shift towards proliferated LEO constellations, software-defined tasking and a world where commercial imagery is woven into day-to-day defence operations.

From a trading or investment perspective, the common threads are obvious: all three are high-volatility, high-execution- risk small-caps with meaningful dilution and contract-concentration risk. At the same time, they represent some of the few listed ways to express a view on “space as critical infrastructure” without buying the large primes.