Xometry's stock jumped 33% on a single morning in May because the company did something investors rarely see in software: deliver a beat-and-raise quarter while actually becoming profitable. Revenue of $205.1 million crushed the consensus estimate of $191.8 million by $13.3 million, non-GAAP earnings per share beat at $0.12 versus $0.1054 expected, and the company raised full-year guidance from 21% growth to 27-28%. But the number that matters most is buried in the operational results: marketplace gross margin expanded 290 basis points to 34.7% in a single quarter. That is not volume growth noise. That is pricing power.

Xometry operates a two-sided marketplace connecting enterprise manufacturers and job shops. On one side: buyers from aerospace, automotive, and industrial sectors ordering custom parts (machined components, sheet metal, injection molding, etc.). On the other side: thousands of regional and global suppliers bidding on orders. The platform automates parts of the traditional quoting process through AI, compressing what used to take days into hours or minutes. Revenue comes primarily from the marketplace (93% of total revenue, up from 90% a year ago) and a legacy services business (advertising on the Thomas platform, 87% gross margin). The market opportunity is massive: U.S. custom manufacturing procurement is heavily fragmented, with regional job shops and tier-two suppliers still competing on phone calls and spreadsheets. Xometry's bet is that centralizing this onto a software platform creates both network effects and machine learning advantages.

The Q1 operational story is straightforward and concrete. Revenue hit $205.1 million, up 36% year-over-year, with marketplace revenue growing 40% to $191.3 million. Active buyers increased 20% to 85,581, but that understates the real story: the company added 3,760 net new buyers in Q1 2026, which CFO James Miln called the highest level of net additions in nine quarters. More important, revenue per active buyer rose 17% year-over-year, driven by what management describes as increasing 'wallet share', existing customers ordering more. The company maintained 98% revenue retention. Accounts spending over $50,000 annually grew 21% year-over-year to 1,864 accounts; accounts over $500,000 annual spend exceeded 140 in fiscal 2025 and grew revenue more than 40% in Q1 2026. Gross profit surged 39% to $78.5 million overall, with marketplace gross profit up 53% to $66.4 million. The company swung from a non-GAAP net loss of $2.5 million in Q1 2025 to a $6.9 million profit.

The acceleration from Q4 2025 to Q1 2026 was not accidental. Xometry deployed a new enterprise machining lead time model into its Instant Quoting Engine, trained on a dataset four times larger than previous versions, which improves prediction accuracy and execution speed. The company also enhanced dynamic pricing logic to better capture supply-demand spreads on individual orders. These changes matter because they compress the friction in sourcing: more accurate quotes, faster turnarounds, better pricing visibility. But the real timing catalyst was the Siemens partnership announced during the quarter. Siemens, which operates a massive procurement operation across its industrial, energy, and digital divisions, agreed to integrate Xometry's platform into its supplier network. Xometry has not disclosed financial terms or specific revenue contribution, but Miln told investors that Siemens represents a 'significant catalyst for global expansion' and expects to drive expansion in Europe, Asia, and other geographies. The partnership legitimizes Xometry at the enterprise level and creates an onramp to Siemens' tier-one supplier base, a group that already manufactures components to spec but could benefit from dynamic sourcing for secondary and tertiary suppliers.

Who wins from here depends on where you sit. Enterprise buyers benefit immediately: lower sourcing costs, faster turnarounds, better price transparency. Xometry benefits because Siemens is not a customer, Siemens is a distribution channel with ten times Xometry's current buyer base. The high-spend accounts (over $50k annually) represent the actual lever: Miln described this cohort as the 'top of the enterprise funnel' and said Xometry believes each account can eventually generate more than $10 million in potential annual revenue. At 1,864 accounts growing 21% per year, that is the early shape of a very large business. Suppliers feel the pressure: the platform increasingly commoditizes sourcing by making pricing and lead times transparent across the network. This benefits efficient, technology-enabled shops and threatens regional players who compete on relationship and opacity. Xometry's international segment is still unprofitable (8% loss margin in Q1, improving from 12% the year prior), suggesting that the platform works in the U.S. but does not yet work in fragmented European or Asian markets where incumbents have deeper ties and different procurement customs.

Watch three things. First, the Siemens ramp: when does Siemens-sourced revenue appear in reported results, and at what scale? Miln explicitly said Siemens is not yet baked into guidance, so if the partnership moves faster than expected, full-year results will beat. Second, enterprise account economics: do accounts with over $500,000 annual spend grow faster than 40% year-over-year, and what is the retention rate at that cohort size? Enterprise procurement is sticky once embedded, but Xometry will need to prove that Siemens-connected accounts stay and expand. Third, international margins: can the company shrink the international loss margin below 5% by end of 2026? If it cannot, Siemens' European footprint becomes a money pit rather than a lever.