APR Technologies: The Deep Dive

The only listed pure play on where chip cooling is physically heading

I have spent the past months going through essentially every public way to play liquid cooling for AI data centers. The fluids (Chemours, Solstice), the two phase challengers (Innventure via Accelsius, and privately ZutaCore), the picks and shovels (Aeroflex, Vertiv, Modine, Munters), the component layer, the whole stack. Out of all of it, one name kept surviving every filter I threw at it: a Swedish microcap that almost nobody covers, that listed in January, and that sits, as far as I can tell, directly on the endpoint of where the entire industry is migrating.

That name is APR Technologies, ticker APRTEC, and this is the deep dive I promised in Execution Memo No. 014.

A few words on what this piece is and isn’t. Coverage of this company is close to nonexistent, so I have tried to write the piece I wish had existed when I started digging: thorough enough to actually understand the technology, the people and the economics, but not a 200 page initiation report. Everything performance related that comes from the company is labeled as such; there is, as you will see, an important distinction between what has been claimed and what has been proven. And the standard warning applies with unusual force here: this is a venture stage company on Spotlight, the position is risky and extremely illiquid, I own shares, and nothing here is financial advice.

With that, let’s follow the heat.

Part 1: The problem

AI compute is thermally gated

Every generation of AI silicon runs hotter than the last. A GB200 package draws up to 2 700W with heat flux above 50 W/cm² on the cold plates. The Rubin generation pushes toward 2 300W per package in its Max configurations, with variants reportedly reaching 3 700W. Racks have gone from tens of kilowatts to 120kW+, with 600kW rack architectures already announced for 2027.

Air cooling died somewhere around Hopper. The industry’s answer is direct to chip liquid cooling: water glycol pumped through copper cold plates pressed onto the chips. It works, it’s deployed at massive scale, and it is being pushed visibly toward its limits.

The stack, and why every layer is a tax

To understand where the opportunity sits, you have to follow the heat from the transistor to the coolant, because heat doesn’t jump into the liquid. It crawls through layers, and every layer resists.

In a classic packaged chip, a desktop CPU say, the journey is: silicon die, then a thermal interface material filling microscopic gaps, then a metal lid, then a second interface layer, then the cold plate’s base, and only then liquid. Nvidia has already stripped this as far as the current architecture allows; H100, B200 and GB200 modules are bare die packages where the cold plate presses onto the silicon through a single interface layer. Even that last layer is a nuisance: it’s a consumable, replaced every time a cold plate comes off, and one of the two dominant resistances in the chain.

The other dominant resistance is the one most people never hear about. Even when heat reaches the liquid, the liquid touching the metal barely moves. Friction pins a thin film of near stationary fluid against the wall, the boundary layer, and heat must conduct through this sluggish film before flowing coolant can carry it away. Conduction through liquid is slow. In a modern direct to chip system, the interface material and the boundary layer together make up the bulk of total thermal resistance.

So all of chip cooling reduces to two questions: how do you get rid of the layers, and how do you kill the boundary layer.

Watch what the industry does, not what it says

Single phase answers both with force. The recipe never changes: push more liquid through finer channels, accept the rising pressure, let the pumps pay in energy and wear. Vera Rubin is this recipe at its logical extreme; trays go fully fanless and the racks run nearly double the coolant flow at the same CDU pressure. For Rubin Ultra, supply chain reporting points to microchannel cold plates where coolant runs directly across the die surface. Microsoft has demonstrated channels etched into the silicon itself, cutting peak temperature rise by 65 percent versus the best cold plates.

Two phase answers the boundary layer question with boiling, which moves heat far more effectively than conduction through a stagnant film. I have written about two phase before and I still believe in it long term. But it leaves the interface layers intact, chip makers haven’t blessed it, questions about maintenance and reliability at hyperscale remain open, and managing boiling vapor inside a chip package is a problem nobody has solved. It is, in my view, further away than the demos suggest.

Put the datapoints in a row and the direction is unambiguous: coolant is migrating toward the silicon. Room, to rack, to plate on the lid, to bare die, and next to channels at and inside the chip. Every step strips one more layer of the tax.

The endpoint has a specification

Follow the migration to its endpoint and write down what it demands:

A fluid that can touch live silicon without destroying it. Water is disqualified on chemistry.

A loop at near zero pressure, because a bonded chip stack cannot take mechanical stress.

A pump that works at chip scale. Mechanical pumps do not miniaturize; bearings, seals and impellers don’t shrink.

Control fine enough to chase hotspots that move around the die in milliseconds, which passive channels, sized once at manufacture for the worst case, fundamentally cannot do.

Neither of today’s camps is built for this. The endpoint belongs to a third kind of solution, and almost nobody is building it.

Part 2: The company

Fifteen years of preparation

APR Technologies was founded in 2011 in Enköping by microelectronics researchers, Are Björneklett, Peter Nilsson and Robert Thorslund, with backgrounds in industrial research including 3D chip packaging; the founders were inventors or co-inventors of, among other things, XiVia and Bluetooth. Their founding insight, stated in 2011, was that cooling would become an ever larger problem and that new thermal solutions would be needed.

For its first decade the company built thermal control hardware for the space industry. It won development projects from the Swedish space agency, sold temperature regulation systems to ground stations, won (and then walked away from, over price pressure) a component procurement for the NASA/ESA Orion crew vehicle, delivered parts to an instrument on the ISS, and built long-running relationships with ESA and Airbus, who formally approved APR’s pilot production line, manufacturing processes and quality system in 2022. In 2024 the company was selected into NATO’s DIANA accelerator and won a 19 MSEK grant from the Swedish Energy Agency to demonstrate high volume production. It ISO9001 certified its operations based on the quality system from the space division.

Why does this heritage matter for an AI cooling thesis? Because space is the one customer base where a failed cooling component ends the mission. Fifteen years of surviving NASA, ESA and Airbus qualification is the strongest reliability evidence a company this size can hold, and reliability, as we’ll see, is the heart of the product.

One more detail from the company’s own history that I find telling: in 2020 APR built a lab prototype for super efficient cooling of Nvidia chips, judged the market not quite ready, and predicted the need would grow. That was five years before the market agreed.

The company listed on Spotlight Stock Market on January 13, 2026 at a valuation of roughly 330 MSEK, alongside a warrant series (TO 1) that was exercised to 99,85 percent in June, adding roughly 55 MSEK before costs.

Rheion: the technology

APR’s core technology, branded Rheion this spring, answers both of the questions Part 1 reduced cooling to.

The pump is electrohydrodynamic (EHD). Electric fields push a dielectric fluid through microchannels, with no mechanical pump anywhere and essentially no moving parts in the loop. The physics is old and solid; charges injected into a weakly conducting dielectric liquid get dragged by the Coulomb force between electrodes, transferring momentum to the fluid. NASA Goddard has patented pumps in the same family for space thermal control, and EHD hardware has flown on the ISS. What’s remarkable is not that it works; it’s that essentially nobody else has commercialized it. Reviews of the field classify EHD pumping as early stage as a category. APR has spent fifteen years in a discipline that barely has other occupants.

Because the fluid is dielectric, it can sit in direct contact with live silicon. The interface layers can simply go; the layer problem is solved by removing the layers. And because the flow is generated by electrode structures inside the channels themselves, the boundary layer is disrupted actively by electric body forces rather than by brute pumping power. The company claims a 5 to 10x improvement in heat transfer coefficient, practical cooling capacity of 100 to 300 W/cm² versus 20 to 50 for conventional approaches, chip heat loads handled up to the kW range including hotspots, all at 0,1 to 1W of pump power. Multiple independently controlled units can be tiled across a chip, steering fresh coolant to hotspots in real time as they appear. The system runs sealed at near zero pressure, avoiding both the pressure stress of pumped water loops and the vapor management complexity of two phase.

The whole architecture, the pump, the microchannels and the fluid, is patented as one integrated system: 74 granted patents plus 31 applications across 16 families, most of the portfolio’s costs already taken.

Two deeper points worth internalizing.

First, the pump and the fluid are not separable choices. An EHD pump physically cannot pump water; water is far too conductive. And water cannot touch a die. So the thermally handicapped fluid class, dielectrics conduct heat far worse than water, is the only class that works at the endpoint of the coolant migration, and APR’s entire architecture, micro fins multiplying surface area, micrometer proximity to the die, active boundary layer disruption, is a fifteen year old engineered answer to exactly that handicap. They aren’t fighting the fluid’s weakness; the design exists to cancel it.

Second, EHD gets better as it shrinks, which is the opposite of mechanical pumping. Electric field strength is voltage divided by electrode gap, so smaller channels mean stronger pumping at constant voltage, and the electrodes are patterned lithographically, meaning the technology rides the semiconductor industry’s own manufacturing curve. The published record suggests today’s claims sit at perhaps 10 to 20 percent of what the physics permits; academic microchannel work has demonstrated 790 W/cm² with water in 50 µm silicon channels as far back as 1981, and DARPA programs have pushed embedded cooling toward 1 kW/cm². The scaling laws cooperate, which is historically the difference between a product and a paradigm.

The honesty section: claims versus proof

Everything performance related above is a company claim. There is no published thermal test vehicle result, no third party benchmark, nothing comparable to Accelsius’s public 4 500W socket demonstration or the Corintis and Microsoft in chip data. The published academic EHD record demonstrates flow control recovery at 77,5 W/cm² and roughly 2 to 5x heat transfer enhancement, meaning APR’s claims sit above the public state of the art. There are two readings: either fifteen years of proprietary work in a near empty field has put them ahead of a literature that barely exists (ESA’s own workshop material describes the EHD technology as mastered by APR, with deterministic, fast flow regulation), or the claims are marketing forward extrapolations awaiting proof.

What exists instead of published benchmarks is a customer, and this is the spine of the whole thesis.

The anchor customer

In spring 2025 a leading global tech company signed a key agreement with APR: an initial product order of roughly 1 MSEK, plus roughly 14 MSEK paid to fund a year of development, designing APR’s pumps into the customer’s own end products and building APR’s solutions into their complete system toward their customers. In December 2025 the first custom designed products were delivered. In January 2026 a follow on pre-series order of roughly 1,5 MSEK arrived, covering on the order of a hundred pumps built on volume tooling; the company states the order confirms the technology meets its calculated functionality. Live testing at the customer has been running for over six months with, per the company, positive results, and per the Q2 operational update the pre-series units are now delivered and under test.

The disclosed follow on if tests convert: an inquiry for large scale production of 150 000 to 500 000 units per year, which the company states would mean revenues of hundreds of MSEK per year, from one customer. Behind it sits a separately disclosed inquiry from larger data center manufacturers for roughly 100 000 pump units per year with revenue potential of 50 to 100 MSEK annually. Long term, the company estimates volumes of 500 000 to 1 000 000 units per year within electronics, notes licensing negotiations with international companies, and states that over 50 large American tech companies fit its product market.

Who is the customer? Undisclosed. The memorandum calls it a leading global electronics company; the spin off of the China linked battery subsidiary Chillwind was done partly to meet customer requirements on the ownership picture, which tells you the customer is Western and security conscious. On X there has been light speculation about various candidates; none of it is confirmed and I won’t add to it. What matters analytically is the structure: customer funded development is the strongest validation signal available at this stage. A global company does not spend 14 MSEK of its own money designing a Swedish microcap’s component into its products for fun. It is also, for now, the only validation, and everything between “meets calculated functionality” and “runs in volume for years” is precisely what the ongoing tests exist to establish.

The use cases beyond the data center

The company organized itself this spring into three business areas, and the breadth here matters for the downside case.

Chip Cooling is the spearhead: data centers, AI infrastructure and advanced electronics, where heat directly limits performance, energy use and system design. This is where the anchor customer sits and where the volume scenarios live.

Space & Defence is the heritage business: recurring revenue from the space and nuclear industries (a new order from an established nuclear industry customer was announced in May), ESA and Airbus as repeat customers, NATO DIANA funding for test and verification activities, and, most interestingly, an evaluation agreement with Zoppas Industries Heating Element Technologies (ZIHET), a global Italian thermal group. The intended structure: APR contributes core technology, know how and technical support; Zoppas contributes industrial capacity, established sales channels and takes the system integrator role toward customers. Per the Q2 update the evaluation is in its final stage with an agreement expected during Q3. This is the licensing model in miniature, and I’ll come back to why it matters for the economics.

Energy covers battery related applications: energy storage, mobility, drones. The company exhibited at The Battery Show Europe in Stuttgart with a battery cell partner and reports early dialogues with drone companies in Eastern Europe. The battery angle exploits something unique in the architecture: Rheion is bidirectional. It’s not just a cooler; it’s a thermal controller that can heat as well as cool, hold a setpoint, and respond in milliseconds. For batteries that means both high load cooling and cold climate conditioning (lithium plating avoidance, winter readiness), which no cold plate and no boiling system can offer.

And then there is the use case the market hasn’t touched at all: photonics. Co-packaged optics is coming to AI hardware, and thermal is its central engineering obstacle. Laser wavelength drifts roughly 0,1 nm per degree, photonic components need control within about ±1°C while sitting next to 500W+ ASICs, and the industry’s current solution is essentially to give up: exile the lasers to external modules (the ELSFP standard) and stabilize them with thermoelectric coolers, which burn one to three watts for every watt of heat they move. Nvidia’s chosen modulator technology for CPO, micro rings, is the thermally fragile one, requiring continuous active thermal tuning inside the package. A sub 1W, bidirectional, millisecond setpoint controller at component scale is aimed at precisely the problem the industry is currently routing around rather than solving. APR has zero disclosed photonics customers; this is architectural fit, not pipeline. But it’s a real, documented unmet need, and I count it as a free option on the position.

Part 3: The people

For a company this size with this little coverage, the diligence has to be on the people as much as the product. The good news is that the people are unusually legible, because the board was visibly rebuilt in December 2025, right before listing, around one specific problem: industrialization.

The CEO: Lars Almhem

Almhem, born 1961, took over as CEO in December 2025. His background: SAAB Automobil and Volvo Cars, 25 years running his own business in quality, efficiency and supply chain globally for Ericsson, NOTE, IKEA and Volvo, production chief at Plasman, and most recently CEO of listed SHT Smart High Tech from mid 2022 to February 2025.

The SHT chapter deserves scrutiny because it’s a dress rehearsal for this job, and I’ve looked at it closely. SHT sells graphene enhanced thermal interface materials, one layer of the thermal stack away from APR. Under Almhem, SHT landed development orders from AMD (including for future AI processors), a delivery approval from another large American electronics company, global consumer distribution through Thermal Grizzly, and the partner strategy that matured into the Henkel relationship, built on the insight that giant customers demand size and stability from suppliers, so a microcap must scale through partners. That is item for item the playbook now running at APR: customer funded development from a global giant, partner led scaling via ZIHET.

The honest counterweight: revenue never converted during his SHT tenure. Full year 2023 net sales were under 3 MSEK against a 38 MSEK operating loss, and the actual breakthroughs, first deliveries toward a world leading AI hardware company, advance payments through the Henkel channel, came after his departure, seeded during his time but harvested by his successor. His departure itself was an amicable, planned succession with warm words from the founder. So the fair summary: proven at building blue chip validation and partner rails at a thermal microcap; unproven at converting them to volume. For the phase APR is in right now, that is arguably exactly the right profile. The phase after is where the rest of the board comes in.

The board

Peter Jansson (joined December 2025) is the quiet key recruit. Co-owner of Lintron Elektronik, which became the foundation of NOTE AB, one of Sweden’s larger contract electronics manufacturers; COO and senior adviser at NOTE until 2009; integration lead for nine acquired units and operationally responsible for three factories in Eastern Europe. He has actually done the thing APR must now do: run volume electronics production at industrial quality and cost. Notably, he and Almhem sit together on another board (HEAD Engineering), meaning the CEO recruited a factory veteran he already knew and trusted.

Johan Claesson (joined August 2025) is the balance sheet, and worth a proper look because he’s more than a financier. Born 1951, Handelshögskolan educated, he owns Claesson & Anderzén with his brother: fourth generation family capital founded 1912 in Kalmar, today a group with property assets valued in the 12 miljarder SEK class, operations across southern Sweden, Germany and Estonia, roughly 46 000 hectares of Ukrainian farmland via Grain Alliance, and a history chairing listed Catella. Swedish wealth rankings have placed him around 2,5 miljarder SEK personally, with the family sphere well above that. His investment style, per an old profile literally titled “He waits for the fall”: hold liquidity, wait for dislocation, buy big.

Through his vehicles Movenio Fastigheter and Bremia he put over 90 MSEK into APR during 2025 and controls roughly 30 percent. And here’s the detail I find most interesting, sitting in plain sight in the memorandum’s directorship tables: during 2025 Claesson took the chairman seat of newly formed entities including CA Datacenter Holding AB and a family of CA Batteribalans (battery energy storage) companies. The anchor investor’s own group is concurrently building data center and BESS ventures, two of APR’s three business areas. This is strategic capital with potential first customer channels attached, not a passive allocation. One more connection worth knowing: Movenio participated in SHT’s December 2024 raise, which is very likely where Claesson met Almhem before recruiting him.

Peter Nilsson and Robert Thorslund, two of the three founders, remain on the board (Nilsson as chairman, having stepped up from the CEO role he held since 2012). Together with co-founder Are Björneklett they hold roughly 35 percent. The technical memory of fifteen years lives here.

Mats Ekberg rounds out the board with small cap financial process experience; for completeness, his firm was paid to produce the listing memorandum and he chaired a dairy company through a 2024 bankruptcy. Process support rather than industrial competence.

Ownership and alignment

Insiders control over 60 percent: Claesson’s vehicles around 30 percent including Bremia, founders around 35 percent, all under lock up agreements limiting sales to 20 percent of holdings in year one. The CEO holds about 120 000 shares. Alignment reads well: the people who know the technology stayed, the people who know factories took the wheel, and the balance sheet has a named backstop with real skin in the game.

The gap, stated plainly

Nobody in the building has worked at a hyperscaler, a chipmaker, or a data center operator. The technical chip knowledge exists in the founders (3D packaging researchers) and the commercial adjacency in Almhem (selling TIM into the AMD ecosystem), but the domain where the value is supposed to be realized has no native representative. The company’s implicit answer is structural: the customer brings the domain knowledge, funds the development, and carries the product to market inside its own systems; ZIHET plays that role for space and defense. Component companies have always scaled this way, Bluetooth itself did, but it means APR’s understanding of its most important end market is mediated through counterparties. A data center or semiconductor name joining the board would be the single most bullish governance signal this company could send, and its absence is the first thing I would fix.

The SHT connection, and why the two aren’t competitors

Since Almhem connects the two companies, a word on SHT Smart High Tech, because the relationship is instructive. SHT sells a better version of the interface layer (graphene enhanced TIM); APR’s endgame abolishes the interface layer at the chip. On the surface that sounds like competition. In practice they occupy opposite ends of the same timeline. Every improvement in cold plates and boiling makes the TIM relatively more of the remaining bottleneck, so SHT’s product gains value throughout the transition, and especially if two phase converts; APR’s architecture wins at the terminal state where fluid meets silicon directly, which arrives socket by socket, years out, at the highest value packages first. Almhem has said publicly he sees the companies as complementary rather than competing, and structurally he’s right: they are opposite sides of the TIM elimination trade, separated by time. For a portfolio builder, the pair is closer to a hedge on architecture timing than a redundancy.

Part 4: The economics

What the financials actually look like

Let’s be blunt about the starting point. Nine month 2025 net revenue was 12,5 MSEK against an operating loss of 6,7 MSEK; full year 2024 was 13,1 MSEK of revenue against a 10,4 MSEK loss. Of the nine month revenue, 7,1 MSEK was service sales to the tech infrastructure key customer, meaning most current revenue is one relationship’s development fees, with the rest coming from ESA project sales, a battery customer in Asia, the nuclear industry, and public grants. Headcount is around 17 to 20 people. This is a venture stage company with a ticker.

The balance sheet, however, was rebuilt for the task. Roughly 115 MSEK was raised across 2025, another 55 MSEK came in via the warrant exercise in June, and cash after the exercise sits in the neighborhood of 140 MSEK. The board’s stated view is that this funds current operations and planned expansion for at least twelve months. The 2026 industrialization program is roughly 40 MSEK of CAPEX, largely equipment for pilot production and controlled environment assembly, partly offset by the 19 MSEK state grant.

Unit economics: component pricing, not metal bending

Here’s where it gets interesting, because APR’s product has electronic component economics rather than cooling hardware economics.

Back out the average selling price from the company’s own disclosed scenarios: 100 000 units generating 50 to 100 MSEK implies roughly 500 to 1 000 SEK per unit, and the anchor customer scenario implies the same range. A Rheion unit is a sealed ceramic device with printed electrodes, microchannels and proprietary fluid; at volume on automated tooling, the bill of materials plausibly lands around 200 to 400 SEK. That’s gross margin potential in the 50 to 65 percent range in theory, and I’d underwrite 45 to 55 percent in practice, because a customer taking hundreds of thousands of units per year will extract volume pricing (the company’s own history contains a lesson here: APR walked away from the Orion space procurement in 2016 over excessive price pressure, which tells you management has margin discipline and tells you what negotiating with giants does to prices).

Why component pricing holds at all: the product is a sole source, spec’d in part that customers design their products around. The business model, in the company’s own words, ties each customer relatively hard to APR as the supplier of cooling for that customer’s product. Add 74 patents and the absence of any functional substitute, and you price on value, not on BOM. Compare commodity cold plates, bent copper in a brutal supply chain running 25 to 35 percent gross, and you see why the distinction is worth 20 margin points.

At a few hundred MSEK of revenue, with a 60 to 90 person organization, patent costs already largely taken, and depreciation on the modest capex base, that translates to EBITDA margins plausibly in the 20 to 30 percent range. Not software. But rare for hardware.

The factory, its ceiling, and the royalty escape hatch

The production plan: from artisanal short series today to roughly 10 000 units per year starting spring 2026 (about 1 000 units a month), scaling toward 100 000 units per month, one million per year, during 2028. Cleanroom process steps run at the Ångström laboratory in Uppsala; assembly, quality control and flows are being built with high automation in Enköping. The capital efficiency is striking: at the implied unit pricing, a fully utilized million unit line generates 500 MSEK to 1 miljard SEK of revenue against a build cost measured in low hundreds of MSEK, meaning the asset pays itself back in roughly a year of gross profit at full utilization.

But notice the ceiling: at their unit pricing, one million units caps manufactured revenue around a miljard SEK. Scaling beyond it means either a much bigger factory, and the company itself flags that a large volume order would likely require expanding production capacity beyond current plans, with capital needs beyond the warrants, or the more elegant path: licensing.

The licensing channel already exists in embryo. Chillwind, the divested battery business, pays running royalties on sales using APR’s technology. The ZIHET structure has the partner manufacturing and selling while APR contributes technology and collects on it. And management explicitly contemplates selling manufacturing licenses against a per unit royalty as a future scenario, alongside an aftermarket in service on installed systems. Every krona arriving through that channel comes in at something like software margins, and it is the channel the company must lean on anyway once its own walls top out. High margin hardware with a royalty escape hatch is a rare structure, and it exists here because the defensible asset is IP and fifteen years of process know how, not the factory.

The financial goal management has put on paper: 500 MSEK of revenue by 2030, with an ambition to have the growth plan fully financed.

The market, sized honestly

The headline numbers are enormous and mostly irrelevant. Data center liquid cooling passing 15 miljarder dollars by 2028; direct to chip alone growing toward 5,6 miljarder dollars by 2030 at roughly 20 percent annually. APR sells none of the racks, CDUs and plumbing that make up most of that.

The honest addressable slice is component level thermal control: chip level devices, precision temperature stages, pack level battery systems, the layer where solid state flow steering is the actual differentiator. I put that at 3 to 4 miljarder dollars by 2030 across data center, photonics, defense, space and batteries. Against that, the realistic base case is simply the company’s own disclosed pipeline: the anchor customer scenario (hundreds of MSEK), the data center manufacturer inquiry (50 to 100 MSEK), and growing space, defense and energy revenue. That lands somewhere around 300 to 800 MSEK by 2030, bracketing management’s own 500 MSEK target, and requiring roughly one percent of the addressable slice. One percent, anchored by a customer already paying, for the only commercialized option in a discipline the rest of the industry hasn’t entered.

Part 5: Liquidity, Spotlight, and the cash question

This section exists because it will determine more of your practical experience owning this stock than anything in Part 2.

The venue. APRTEC trades on Spotlight Stock Market, an MTF, not a regulated exchange. Disclosure standards are lighter, institutional participation is minimal, there is no liquidity guarantor agreement, and research coverage is essentially zero. This is both the opportunity (nobody is looking) and the tax (nobody is looking).

The float. With insiders above 60 percent under lock ups, the effective free float is small. The stock moves violently on modest volume; it roughly doubled from the 13,50 SEK listing level within months, ran hard into early June, and swings of 10 percent plus on no news are routine. Position sizing and limit orders are not optional here. If you cannot tolerate a 50 percent drawdown on sentiment alone, this is not the name.

The cash math. Roughly 140 MSEK of cash, a burn that will rise with the industrialization program (40 MSEK CAPEX plus growing opex), and a stated runway of at least twelve months. Read that plainly: a further raise in 2027, possibly late 2026, is close to certain, and here is the paradox worth internalizing in advance: good news accelerates it. A volume order from the anchor customer would require production capacity well beyond the current program, and the company says openly that such a scenario could require additional capital, with loans and other financing examined first but further issues not excluded. So model dilution into your expected return now, and decide in advance whether you’d participate. The mitigating factor is the anchor owner: raising is a different exercise when a multi miljard family sphere with a stated preference for dry powder sits at 30 percent and has already followed on repeatedly. The dilution risk is real; the financing risk, the risk that money simply isn’t available, is much smaller than for the average Spotlight microcap.

Part 6: Valuation, and the M&A floor

I’m not going to pretend a DCF on a pre volume company means much. The more honest frame is the one the industry itself has been writing in transaction prices for two years, because the liquid cooling sector has been consolidating at a furious pace, and it gives us marks at every maturity stage.

At the bottom of the ladder: Flex acquired JetCool in November 2024 for roughly 53 miljoner dollars total. JetCool was a venture stage company with clever chip level cooling technology (microconvective jets), modest revenue, and a team. In the middle: Schneider Electric paid 850 miljoner dollars for 75 percent of Motivair, implying roughly 1,1 miljard for a 150 person company with real CDU and cold plate revenue. At the top: Ecolab agreed this spring to buy CoolIT for 4,75 miljarder dollars at 29 times forward EBITDA, explicitly to align with Nvidia’s cooling roadmap. Vertiv took CoolTera along the way, and Boyd has been reported as a sale candidate. In under two years the strategics have swept the shelf; what remains independent is a handful of venture darlings, the two phase players, and APR.

Now place APR on that ladder. Today, at roughly 27,6 miljoner shares and recent prices, the market cap sits around 700 to 800 MSEK, roughly 65 to 80 miljoner dollars depending on the day. That is about one JetCool above the JetCool price, for a company with a deeper patent estate (74 granted versus JetCool’s much smaller portfolio), its own proprietary fluid, fifteen years of flight heritage, NATO selection, and a paying global customer in live validation, none of which JetCool had. I think of the JetCool mark as establishing something close to a floor logic: this is roughly what a strategic pays for a differentiated cooling technology team and IP estate before commercial proof. At worst, the bear case where the anchor customer walks, you own a competent team, 74 patents, a proprietary fluid and fifteen years of progress in a sector where that exact bundle has a demonstrated clearing price not far below the current market cap, plus a real, revenue generating space and defense business underneath it. The floor isn’t zero, and in a consolidating sector it isn’t even particularly far down.

The upside frame is the other end of the ladder. If the volume order lands and APR becomes a company shipping hundreds of thousands of units into a global customer’s products, the comp set jumps from JetCool to the Motivair and CoolIT axis, where strategics have paid roughly 4 to 8 times revenue and up to 29 times EBITDA for proven, roadmap aligned cooling businesses. On the base case revenue range that supports a valuation of 1,5 to 4 miljarder SEK; in the bull case where licensing carries volume past the factory ceiling, meaningfully more. That is the honest shape of the asymmetry: roughly 1 to 2x of downside protection from the tuck in floor against 4 to 10x in the scenarios where execution matches the disclosed pipeline. And critically, the rerating mechanism doesn’t require years of compounding; the CoolIT arc, bought by KKR pre volume, sold three years later for multiples of entry, shows that in this sector a validation event moves a company from one rung of the ladder to another in a single step. If things start rolling, I believe this stock could rerate by an order of magnitude in a fairly short time frame, because that is quite literally what the industry currently pays at the next rung.

Two caveats on the M&A frame. Control sits with insiders who have every incentive to wait for the higher rung; the floor supports the stock, but no near term bid should be expected. And the company itself flags that its products could come to be classified as strategically significant or dual use, which, combined with Swedish FDI screening and the NATO DIANA involvement, trims the list of possible acquirers even as it validates the asset.

Part 7: Risks

Let me be explicit, because the risk profile here is closer to a venture investment that happens to have a ticker.

Single customer concentration. The thesis spine is one undisclosed customer. If their tests disappoint, or their own product fails commercially, or they redesign around APR, the volume scenario evaporates. The company’s own risk section names customer concentration explicitly.

Claims without public proof. All performance figures are company claims. No thermal test vehicle results, no third party benchmarks. The pre-series testing may prove them; it may not.

The 100x scaling problem. From artisanal production to a million units a year during 2028, executed by an organization of about twenty people. Yield on sealed fluidic ceramic devices at volume is unproven by anyone, anywhere. The company itself rates the production scale up risk as medium probability, high impact.

Dilution. Near certain, as covered in Part 5. Success makes it arrive sooner.

The fluid question. The fluid chemistry is undisclosed. Fluorinated fluids are the canonical working liquids in EHD research, and if APR’s fluid is fluorinated, EU PFAS regulation sits directly on the thesis. Conversely, the company recently advertised for a fluid and coolant specialist to evaluate coolants on thermal, electrical, chemical and environmental requirements, suggesting fluid selection is active engineering. I have not been able to resolve this question from public material and consider it the single most important unanswered item.

Competition converging on the neighborhood. Corintis has raised over 50 miljoner dollars, ships microfluidic cold plates at real volume, and partners with Microsoft on in chip cooling. AVC reportedly builds Nvidia’s coming microchannel plates. None of them do solid state pumping or active flow control, that discipline remains essentially empty, but if passive geometry plus bigger central pumps stays good enough for long enough, APR’s differentiator gets commoditized around. This, more than two phase, is the real competitive risk: the bet is intelligent thermal control versus brute force, and brute force has a lot of budget behind it.

Timeline slippage, the Sivers lesson. Swedish deep tech microcaps with world class niche technology, blue chip engagements, and imminent commercial breakthroughs have a well documented base rate: qualification cycles run longer than retail patience, financing needs compound, and the stock round trips before anything converts. Almhem’s own SHT tenure demonstrated exactly this pattern. Assume every timeline in this piece slips 12 to 24 months and check whether you’d still hold; I did, and I would, but only at the position size I actually have.

Liquidity. Covered in Part 5. It bears repeating: this stock can fall 30 percent because one holder needed a boat.

Part 8: Recent developments and what to watch

The recent tape

The past quarter has been unusually eventful for a company this size:

The operational update in early July was, for me, the entry catalyst. It brought a visibly sharpened strategy: three clean business areas with Chip Cooling aimed squarely at data centers and AI infrastructure, the Rheion branding and a rebuilt website that finally explains the offering, and confirmation that the pre-series units ordered by the global tech company have begun delivery and are being tested by the customer. Earlier in the spring the story was harder to grade, a jumble of batteries, space and electronics all at once, right as the stock ran roughly 400 percent in short order; the update resolved the jumble in exactly the direction the thesis wants.

The TO 1 warrant exercise landed at 99,85 percent, adding roughly 55 MSEK and removing the near term financing question.

The ZIHET evaluation is in its final stage, with an agreement expected during Q3. If signed on the intended structure, it’s the first live demonstration of the license and royalty model.

A nuclear industry order in May added another qualified demanding environment customer to the heritage business.

A test rig has been built for demonstrating and benchmarking the technology against relevant cooling scenarios, described as a step toward giving industrial customers concrete decision material. Read: the company is preparing to answer the claims versus proof gap.

Hiring signals: recruitment of a PhD level thermal design engineer and a fluid and coolant specialist within weeks of each other, plus a consultancy partnership with Mint Engineering to add engineering capacity. Companies at this size hire ahead of expected demand, not behind it; the roles read like industrialization and qualification, not research. A small insider purchase was also registered recently, modest in size but pointing the right way.

Coverage: still nearly nothing. A handful of X threads and one thoughtful independent write up focusing on the precision control angle. The discovery hasn’t happened, which for current holders is the point.

The catalyst calendar

Q2 report, August 20. First read on post listing momentum, cash position after the warrant money, and any commentary on customer testing.

ZIHET final agreement, expected Q3. Watch the economics: license fees, royalty structure, any committed volumes.

The anchor customer’s volume decision. The big one, and the timeline belongs to the customer, not to APR. The memorandum framed final tests running during 2026 in the customer’s facility; the honest expectation is a decision somewhere between late 2026 and 2027, with slippage more likely than acceleration. This is the binary that moves the company between rungs of the valuation ladder.

Production milestones. The 10 000 unit per year line entering operation; any announcement of expanded capacity plans would itself signal what management is hearing from customers.

Board or advisory additions. A data center or semiconductor name joining would be the strongest possible tell that the volume phase is real.

Q3 report, November 19, and, realistically at some point, a capital raise, which given the anchor owner is more likely to be an event to participate in than to fear.

Closing

Let me compress the whole piece into its essential shape.

The industry has agreed, in actions if not in words, on where chip cooling is going: coolant migrating step by step toward the silicon. The endpoint of that migration has a physical specification that disqualifies water, mechanical pumps and boiling. One listed company has spent fifteen years building the only commercialized technology that matches the specification, hardened it in space where failure isn’t an option, fenced it with 74 patents including the fluid itself, and convinced a global tech company to pay for the privilege of designing it into their products, a validation now running live, with a disclosed volume scenario behind it that would transform the company’s scale.

Around it, the sector is consolidating at prices that make the current market cap look like a floor: the last comparable technology tuck in cleared a majority of APR’s entire valuation, and the proven names go for miljarder. Against that stands venture grade risk in every direction: one customer, unproven claims, a 100x manufacturing ramp, certain dilution, an unanswered fluid question, and liquidity that punishes impatience.

I own it small, sized like the venture bet it is, watching three things: the volume order, the fluid, and the boardroom. The asymmetry is the position; the patience is the price of admission.

Thank you for reading. Questions welcome, as always.

Disclaimer: This is not financial advice. I hold a position in APRTEC and my view is accordingly biased. The company is a venture stage microcap trading on Spotlight Stock Market with very limited liquidity; the stock can move violently on small volume and the risk of substantial or total loss is real. All performance figures originate from the company unless otherwise stated. Do your own research.