Proto Labs Q2: 10% Growth and Raised Guidance Say One Thing-Valuation Says Be Careful

Record revenue and raised guidance improved the operating case

Proto Labs just delivered record quarterly revenue of $149.3 million and lifted its full-year outlook. But the stock still traded at about 71.00 trailing P/E. That is the core tension: the business is executing well, but the valuation already reflects a lot of that confidence.

This does not look like a one-off quarter. Proto Labs posted 10.2% year-over-year growth in constant currencies and has now delivered double-digit growth for a third straight quarter. That streak, paired with the higher outlook, makes the operating case look more durable than accidental.

Profitability improved alongside growth

The most important part of the quarter was not just the revenue beat. Proto Labs combined record revenue of $149.3 million with gross margin up 200 basis points to 46.8%, adjusted EPS of $0.60, and adjusted EBITDA margin of 16.8%. Growth and profitability improved at the same time, which is what matters when a stock already carries a rich multiple.

Revenue per customer shows deeper engagement

Revenue per customer grew 17% year over year. That points to a busine ss getting more value from existing accounts, not just winning more isolated orders. If larger, more strategic customers are using more of the platform, each additional dollar of revenue can be easier to profit from over time.

Multiple manufacturing lines are growing

The strength also looked broader than one service line. Injection molding revenue accelerated 12.9% and CNC machining revenue grew 13.1%. That supports the idea that Proto Labs is becoming a wider manufacturing partner rather than relying on a single process.

You can see part of that pattern in the prior quarter as well. In Q1, Proto Labs delivered record quarterly revenue of $139.3 million, with CNC machining revenue grew 19.7% and revenue per customer contact increased 20.4%. That makes the Q2 result look less like a lucky month and more like part of a continuing trend.

Raised guidance helps the case, but the stock leaves little room for error

Management raised its 2026 revenue growth outlook to 8-10%. That is a meaningful signal because it ties the quarter's operating improvement to the rest of the year.

Still, investors should keep expectations in context. Some of the positive frame is that expenses and other pressures were still working through the business, so the cleanest version of the margin-expansion story still needs more proof. For now, the quarter strengthened the operating case without fully settling the valuation debate.

What to watch next in Proto Labs

The next test is not whether Proto Labs can beat again. It is whether the business can keep supporting a premium valuation if execution starts to normalize. After the run that left shares near the upper end of its 52-week range and lifted them 5.06% in premarket trading to $78.94, the market may punish disappointment faster than it rewards another headline beat.

The main bull-case signals

• Keep an eye on whether revenue per customer keeps rising.
• Watch for continued strength across both injection molding and CNC machining.
• Check whether the raised full-year growth range still looks reasonable as the year progresses.

What could weaken the case

Some risks were already visible in the quarter. 3D printing revenue declined 2.7%, network revenue was flat, and Europe remains a transformation story. If those weak spots widen while the faster-growing parts of the business cool, investors may decide the business is still solid but no longer worth a top-tier multiple.