Teradyne Looks Expensive Until You Price The AI Chips It Has Not Tested Yet

Teradyne (TER) makes the equipment that tests semiconductors, and AI data centers have remade a business that last peaked on smartphones in 2021. The stock has returned about 185% over the past year. Even after falling about 32% from its 52-week high, it trades at about 41.8 times trailing adjusted earnings, the least useful number on the screen.

Why Teradyne Looks Expensive On The Earnings It Has Already Booked

The trailing multiple sits on adjusted earnings, meaning normalized net income with stock-based compensation added back, a basis meant to sit closer to the one analysts use in their forecasts, though the two are not defined identically. In the second quarter of 2026, more than 60% of revenue was AI-driven, from testers for accelerators, CPUs and networking silicon, and for HBM and DRAM, where Teradyne set another record quarter.

But Less So On What Analysts Expect It To Earn In 2027

On the consensus for 2026, today’s price is about 36.0 times earnings. On the consensus for 2027, it is about 28.4 times.

Consensus has earnings growing about 29.3% a year from the trailing twelve months to 2027, faster than the 24.9% a year it has for revenue, and the difference is margin: the 2027 multiple holds only if margins keep widening. That 24.9% a year is also well below the 57.9% revenue growth Teradyne delivered over the trailing twelve months, so consensus asks less of the top line and more of the margin.

So Which AI Orders Have To Land To Earn That Multiple?

Near term, the direction runs the other way. Management expects the first half to carry 50% to 52% of 2026 revenue. Its compute and networking customers built out test capacity in the first half of 2026 and are now using it, and management expects their next surge in the first half of 2027. For the third quarter of 2026 it guides the non-GAAP operating margin to 28% to 30%, down from 33.7% on the same basis in the second quarter of 2026, as the mix shifts away from compute and operating expenses rise. Memory, management says, will keep straining margins into 2027.

So the 2027 consensus needs the compute surge on time, and it needs Teradyne to win share in it. Teradyne shipped its first merchant GPU order in the second quarter of 2026 and has completed the correlation step of qualification at a second hyperscaler, and management expects the share change to show in 2027, gradually, socket by socket. Behind both sits its case that wafer fabrication equipment spending is accelerating, and every transistor must be tested.

Analysts are split: 11 of them cover 2027, and their estimates run from $9.39 to $13.58 per share. Management’s own target earnings model runs to $9.50 to $11 of non-GAAP EPS, and the 2027 consensus of $11.75 sits above its top. Management says it is confident of reaching that model at an accelerated pace and will update it on its fourth-quarter 2026 call. Until then, the 2027 multiple rests on analysts running ahead of the company.

So Are You Buying Teradyne Early, Or Just Paying Up?

The trailing multiple cannot tell you. Neither can the forward one, until you decide whose forecast you believe and what a year’s delay would do to it.

Doing that for everything you own is the job. Since its inception, our rule-based Trefis High Quality Portfolio has outperformed its benchmark, a blend of three major indices.

Or see which stocks trade furthest below what analysts expect them to earn: our Forward Valuation Discount screen ranks them. Finding the gap is the easy part.