Rheinmetall (RHM): record backlog, cash flow under strain

2026-09-18 · By Lubin Danilo, founder of Lubin Investment

RHM.DE: see the full analysis on Lubin Investment

Rheinmetall's order backlog just hit a record on European rearmament, but its free cash flow collapsed in the first half of 2026 after a navy program was cancelled. My model points to a 47% discount versus the current price, but I want the cash to turn positive again before trusting it fully.

Why everyone is suddenly talking about Rheinmetall

Since 2022, one German industrial name keeps showing up in European financial news: Rheinmetall. It builds Leopard 2 tanks and their upgrades, Boxer and Puma armored vehicles, a large share of the artillery shells fired across Europe, and air defense systems like Skyranger. This is not a stock market fad, it is the direct result of a political decision. In June 2025, at the NATO summit in The Hague, member states committed to raising defense spending to 5% of GDP by 2035, up from the 2% benchmark set in 2014. Of that 5%, 3.5 points go directly to core military capabilities: tanks, ammunition, air defense systems. Rheinmetall is one of the few European manufacturers able to absorb that order flow at continental scale.

What actually protects Rheinmetall from competition is not a brand or a patent, it is time. Qualifying a new ammunition or armor supplier with a defense ministry takes years: ballistic testing, security audits, approvals that put the client state's own liability on the line. Building a powder or explosives plant that can produce safely takes just as long, and cannot be shortcut with a big check. That kind of slow, expensive-to-build barrier to entry is a real moat, a durable competitive advantage: even with billions to spend, a competitor cannot catch up to Rheinmetall in a year or two.

The direct result of that dynamic: as of June 30, 2026, Rheinmetall's order backlog reached 80.5 billion euros, up from 56.0 billion a year earlier, a 44% increase in twelve months. To put that in scale, that figure represents several years of the group's revenue already secured under contract. That number, more than any other, explains why the stock stays under constant investor scrutiny, even after an already spectacular run since 2022.

Europe does not have a single obvious defense champion. France and Germany share KNDS (the Nexter-KMW merger), Italy has Leonardo, a name I have already covered on this site, Sweden has Saab. What sets Rheinmetall apart is specifically its ammunition and explosives capacity, the actual bottleneck exposed by the war in Ukraine: shells, propellant, powder. That is the segment where capacity, not design cleverness, decides who wins the contract.

What my quality checklist actually says about the business

On my site, before I ask whether a stock's price is attractive, I judge the quality of the business first, separately, against ten concrete financial criteria (profitability, sales and cash growth, share count discipline, debt, return on invested capital). Rheinmetall passes 8 of those 10 criteria today, rechecked live the day I am writing this. That is not the top score, and two points deserve an explanation rather than just a mention.

On the strong side: net margin comes in at 7.0%, modest for an industrial name but expanding steadily (operating margin in the first half of 2026 rose from 12.1% to 15.0% year over year, and the second quarter alone hit 17.1%, up from 13.4% a year earlier). Return on invested capital (Cash ROCE, the cash generated relative to the capital actually tied up in the business) reaches 28.9%, a high level that says every euro poured into a new plant or production line earns back more than it costs. And the company carries no net debt: its cash exceeds its financial debt, a real cushion for an industry that has to fund plant construction long before getting paid for what those plants will produce.

The criterion that fails is instructive: revenue per employee is only growing 1.2% a year. That can look like a warning sign, but the mechanism is straightforward for a company building new production capacity: Rheinmetall is hiring and opening production lines (new ammunition plants in Germany, in Lithuania, a joint venture in Ukraine) faster than those new lines are ramping up and turning into revenue. That is not the same as a company growing without becoming more efficient, it is the normal lag between investment and payoff, one that should close over the next two to three years if the plants deliver on schedule.

Free cash flow per share (cash generated divided by share count, the money genuinely left over once bills and investments are paid) shows growth of over 100% year over year in my model. I would treat that figure with caution as it stands: for a defense manufacturer, quarterly cash flow is extremely choppy, because large military contracts bill in milestones, advance payments up front, then quarters where cash gets tied up in inventory and production before the next delivery unlocks the following payment. Aggregating my own numbers from the published quarterly data, Rheinmetall's annual free cash flow moved from roughly -175 million euros in 2022 to +345 million in 2023, +988 million in 2024, and around +1.4 billion euros in 2025. It is that multi-year trajectory, not a single year's percentage, that convinces me the cash is genuinely following the order growth.

One more thing worth knowing: Rheinmetall still carries a legacy automotive-supplier arm (piston and engine components), a holdover from before the defense boom. As defense now accounts for the large majority of group sales, that shrinking, lower-margin segment matters less to the blended numbers every quarter, which itself helps explain part of the margin expansion beyond pure defense volume growth.

The price, and why the market is starting to doubt

Rheinmetall currently trades at 33.6 times its annual free cash flow (P/FCF, price-to-free-cash-flow: the share price divided by the cash generated each year; a P/FCF of 33.6 means you are paying today for more than three decades of that cash at the current run rate). That is a stretched multiple, well above what a pure value screen would accept. I do not have a clean five-year P/FCF percentile for this specific stock the way I sometimes do for US names, and I would rather say so plainly than fake a number. But a high P/FCF is only a problem if the growth that justifies it stops, and that is exactly the doubt that crept in this summer.

On August 6, 2026, Rheinmetall published its first-half results: revenue up 39% to 5.227 billion euros, operating profit up 74% to 786 million. On paper, those are numbers no other European industrial company can match. But the official half-year report also shows operating free cash flow sinking to -1.616 billion euros over the six months, against -631 million a year earlier, a deterioration of nearly a billion euros, largely driven by a massive build-up of raw materials and in-progress ammunition inventory, aimed at securing supply chains against demand that outpaces immediate capacity. At the same time, the German Ministry of Defence cancelled the F-126 frigate program, which costs the naval division up to 300 million euros of expected 2026 revenue and forced Rheinmetall to cut its full-year guidance to a range of 13.7 to 14.2 billion euros.

That combination, a backlog that has never been fuller and a cash flow that keeps sinking, is exactly why the stock reacted nervously despite seemingly excellent results. My own model projects the company's future cash five years out from conservative assumptions (capped growth, an exit multiple bounded by the stock's own trading history), a mechanic I detail in my article on how I calculate a reasonable buy price, to arrive at a reasonable buy price of 1,500.68 euros. Against a share price of 1,018.40 euros, that is a 47.4% discount. That is a wide gap, and I treat it with the same caution I would give any extreme output from my model: part of it likely comes from that same choppy cash trajectory that makes quarter-by-quarter reading so hard. But unlike other extreme discounts I have already dismissed on this site because they rested on a single questionable data line, this one is backed by an independently verified order backlog and a margin trajectory improving over several consecutive quarters. That counts for something.

My call, and what would change it

Rheinmetall's quality is not much in doubt for me: a real moat built over years of qualification and industrial capacity, margins and returns on capital improving quarter after quarter, no net debt, and a backlog that gives years of visibility. The question, as always, is not quality, it is price, and how much confidence I give the negative first-half cash flow.

What would make me buy with conviction: a second half where free cash flow turns positive again, in line with the seasonal pattern this company has shown every year since 2022 (the first half is structurally the most cash-consuming, the second half concentrates deliveries and milestone payments). What would hold me back: another program cancellation after the F-126, or a share count that keeps climbing (+2.48% a year today, still a modest pace but worth watching) if the company ever had to fund its growth by diluting shareholders instead of using its own cash. CEO Armin Papperger has built his strategy around rapidly opening new ammunition plants in Germany, Lithuania, and through a joint venture in Ukraine, an aggressive capital allocation that matches the order backlog but leaves little room for execution mistakes.

For now, I put Rheinmetall in the same category as the best quality theses I have already written on this site: a business I do not doubt, but one where I want the cash to confirm the promise of the backlog before treating my model's discount as fully reliable. Find all these numbers, recalculated live, on the full Rheinmetall data page, and the detail of my method on the methodology page. The wider defense sector, with the other names I have already screened, is available in my defense sector ranking.

FAQ

Why has Rheinmetall's order backlog grown so much?

European rearmament, accelerated since 2022 and formalized by NATO's commitment to raise defense spending to 5% of GDP by 2035, is pushing governments to order armored vehicles, ammunition, and air defense systems at a scale never seen before. Rheinmetall, one of the few manufacturers able to produce at that scale in Europe, captures a disproportionate share: its backlog reached 80.5 billion euros as of June 30, 2026, up from 56.0 billion a year earlier.

Why is Rheinmetall's cash flow negative despite record orders?

Large military contracts bill in milestones: the company spends heavily on raw materials and production before receiving the payment tied to delivery. In the first half of 2026, that lag was amplified by a deliberate build-up of raw material inventory to secure supply chains, which pushed operating free cash flow down to -1.616 billion euros.

What is the F-126 program and why does its cancellation matter?

The F-126 was a frigate program ordered by the German navy. Its cancellation by the Ministry of Defence strips Rheinmetall of up to 300 million euros of expected 2026 revenue for its naval division, and forced the company to cut its full-year revenue guidance.

Is the 47% discount from my model reliable for Rheinmetall?

It rests on conservative assumptions applied to a cash flow that is naturally choppy quarter to quarter for a defense manufacturer, so I treat it with caution. But it is backed by an independently verified order backlog and a margin that keeps improving, which makes it more credible than an isolated extreme gap based on a single data line.

About the author

Written by Lubin Danilo, founder of Lubin Investment. A self-taught individual investor, I find fundamental analysis fascinating, and it has delivered excellent results. For three years now, my performance has beaten the S&P 500. But analyzing every stock took too much time: sites with incomplete data, calculation methods and criteria never aligned with mine. And spotting the best stocks was just as time-consuming, even with my own well-defined checklist. So I put my software development background to work to build this software, base my investment strategy on its results, and share it with people who share the same passion as me. It judges a company's quality and its price separately, using criteria drawn from the financial literature (Warren Buffett, Michael Mauboussin, Aswath Damodaran).