DDD vs MTLS: Which Is the Better Buy in 2026?
Last updated October 2026
Short answer
DDD (3D Systems Corporation) and MTLS (Materialise) share investment themes but are different businesses. The right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme.
DDD vs MTLS: the tie-breaker metrics
Same yardstick, side by side (as of October 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.
| Metric | DDD | MTLS | What it tells you |
|---|---|---|---|
| Market cap | $458.57M | $460.57M | Size. The larger name is the incumbent; the smaller has more room to grow and more to prove. |
| Forward P/E | -22.08 | 31.07 | Valuation on next year's expected earnings, the same yardstick for both. Lower is cheaper for that growth; higher means the market is paying up. |
| Beta | 2.78 | 1.33 | Volatility vs the market. Above 1 swings harder than the index; below 1 is steadier. Higher beta means bigger drawdowns to hold through. |
| Price vs 52-week range | 44% of range | 80% of range | Where today's price sits between the 52-week low and high. Near the high is momentum with less margin of safety; near the low is out of favor or a discount, depending on why. |
| Price / book | 1.68 | 1.63 | How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price. |
Before you buy: how DDD and MTLS affect your concentration
The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. DDD and MTLS share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.
This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined DDD and MTLS exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.
What does 3D Systems Corporation (DDD) do?
3D Systems Corporation is one of the original additive manufacturing companies, offering a broad portfolio of 3D printers, print materials, software, and on-demand manufacturing services. It reports in two segments. Healthcare Solutions covers dental, medical devices, and regenerative technologies like bioprinting, and in Q1 2026 grew about 21% year over year (roughly $50 million) on strength in Dental and Med Tech, each up over 20%. Industrial Solutions serves aerospace, defense, and general manufacturing and grew more modestly (roughly $45 million). Total Q1 2026 revenue was about $95.5 million, up ~1% reported but ~11% excluding divestitures, and healthcare has grown to a scale that now rivals the industrial business.
What does Materialise (MTLS) do?
Materialise is a Belgian additive manufacturing company that combines 3D printing software, a large printing service bureau, and a medical device business making patient-specific surgical guides and implants. It reports in euros through three segments (Medical, Manufacturing and Software) and has about 2,556 employees.
DDD vs MTLS: how do they differ?
Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.
- DDD drivers: Healthcare as the growth engine; Margin recovery and cost discipline.
- MTLS drivers: Medical is the differentiated business; Software licensed across the industry.
Which fits which kind of investor
A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: The central risk is that 3D Systems is a small, not-yet-consistently-profitable turnaround, so the thesis depends on execution that has not been fully proven. For MTLS, the general service-bureau business is competitive and price-sensitive, and printing capacity is not scarce.
DDD or MTLS: which should you pick?
DDD vs MTLS: the full fundamentals
DDD. With no GAAP profit and analysts expecting a loss of about $0.14 per share for 2026, earnings multiples are not meaningful, so the stock trades on sales (about 1.2x trailing revenue) and margin trajectory. The shares rose about 56% in 2026 through October 16 but fell about 20% in the past month, a reminder of how volatile a sub-$5 small cap can be. The early-November third-quarter report, with consensus near $97 million of revenue, is the next checkpoint.
MTLS. Materialise trades at about 1.7x trailing sales and roughly 29x trailing earnings, with about $134 million of cash against about $60 million of debt. The multiple has expanded with the share price in 2026, while consensus expects only modest earnings per share this year and next, so the valuation leans on medical and aerospace growth continuing. Reported figures are converted from euros and move with the exchange rate.
Headline figures (approximate, October 2026): DDD shows revenue (ttm) ~$388 million, ~flat yoy in Q2 2026, q2 2026 revenue / adjusted eps ~$94.6 million / -$0.04 vs ~-$0.05 expected, gross margin (ttm) ~34%, operating margin (ttm) ~-11%; MTLS shows revenue (ttm) ~$273 million, revenue growth (q2 2026, yoy) ~+8%, net income (ttm) ~$13 million, gross margin ~57%.
The bottom line: DDD vs MTLS
DDD and MTLS are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined DDD and MTLS exposure against your real portfolio. It is not an investment adviser.
Wondering how DDD or MTLS fits the portfolio you already own? Walnut is an AI investing app that connects your brokerage read-only and answers questions like that about your actual holdings: overlap, concentration, and how each position tracks the S&P 500. Compare the best AI portfolio analyzers or see the best AI investing apps in 2026.
Investing in 3D Systems Corporation with AI
Connect the broker you already use and ask Walnut's AI how DDD fits what you actually hold: whether you own it already through a fund, what it would do to your concentration, and how it has tracked the S&P 500. Read-only by default, and you approve anything before it reaches your broker.
FAQ
What is the difference between DDD and MTLS?
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3D Systems Corporation is one of the original additive manufacturing companies, offering a broad portfolio of 3D printers, print materials, software, and on-demand manufacturing services. Materialise is a Belgian additive manufacturing company that combines 3D printing software, a large printing service bureau, and a medical device business making patient-specific surgical guides and implants. They show up together because they share investment themes, but they are different businesses, so the better fit depends on which thesis you are expressing.
Is DDD or MTLS the better stock?
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Neither is universally better; they suit different views and risk levels. Walnut is informational, not investment advice. Compare what each does, the tie-breaker metrics above, and the risks, then decide which fits your thesis and what you already own.
Which is cheaper, DDD or MTLS?
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On forward P/E (as of October 2026), DDD trades at -22.08x and MTLS at 31.07x, so DDD is the cheaper of the two on next year's expected earnings. A lower multiple is not automatically the better buy: a richer valuation can be justified by faster growth, and a lower one can reflect real risk. Weigh the multiple against how fast each business is compounding.
Should you own both DDD and MTLS?
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Because they share themes, owning both concentrates you in that theme. That can be intentional (a focused bet) or accidental (less diversification than it looks). Walnut can show your combined exposure across both, and whether adding either over-concentrates you, before you buy.
What are the risks of DDD vs MTLS?
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DDD: The central risk is that 3D Systems is a small, not-yet-consistently-profitable turnaround, so the thesis depends on execution that has not been fully proven. Additive manufacturing demand, especially in industrial markets, is cyclical and can soften with capital-spending pullbacks, while healthcare growth must keep compensating for a slower industrial base. The company competes against larger and well-funded rivals, and pricing pressure could cap margin gains. Its history of losses, divestitures, and restructuring shows how hard sustained profitability has been. As a low-priced small cap, the stock is volatile and can move sharply on single quarters or news, and convertible notes plus any future capital raises create dilution risk. It pays no meaningful dividend, so returns rely entirely on the turnaround working. Trailing-twelve-month revenue of about $388 million is roughly flat, operating margin is about -11%, and analysts expect a loss of about $0.14 per share for 2026, so the path to consistent profit is still unproven. MTLS: The general service-bureau business is competitive and price-sensitive, and printing capacity is not scarce. Medical revenue is regulated, so approvals and reimbursement decisions affect it directly. As a Belgian company reporting in euros, results are exposed to currency movements against the dollar. The additive industry overall has grown more slowly than forecast for a decade. Operating margins are thin (under 1% on a trailing GAAP basis), so small revenue misses swing earnings, and after a 48% year-to-date rise the shares trade near the analyst mean target of about $8.82 with only three analysts covering the stock. Leadership turnover in the medical segment (its head left in September 2026) is a further execution watch point.
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Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell DDD or MTLS; figures are approximate and dated (as of October 2026). Verify current data before investing.