Teradyne Q3 2026: revenue up 70% to $1.31B on AI chip test, beating the top of its own guidance

Overview

Teradyne makes the machines that test computer chips before they ship, test equipment for electronics and disk drives, and a smaller line of factory robots. In the third quarter of 2026 (the three months ended September 27, 2026), revenue rose 69.8% to $1,306.0 million from $769.2 million a year earlier, and came in above the top of the $1,200–1,300 million range management gave in July. Net income attributable to Teradyne nearly tripled to $342.4 million, and diluted earnings per share (EPS, profit divided by the number of shares) rose from $0.75 to $2.17.

Against the record second quarter the picture is flatter: revenue slipped 1.7% from $1,329.0 million and EPS fell from $2.38. The release credits demand "across the AI value chain, from memory and hard disk drive test to high-speed interconnect and robotics," with record revenue in memory test and in Integrated Systems Test.

This analysis is written from the October 27 earnings release (8-K Exhibit 99.1). The full Q3 10-Q has not been filed yet, so the segment profit figures and management's line-by-line explanation of each change are not available; the release gives only revenue by segment for this quarter.

Key metrics

Takeaway: Teradyne is now earning about $2.17 a share per quarter on roughly $1.3 billion of sales, almost three times a year ago, and the gain is almost entirely operating leverage: sales up 70% on a cost base up 21%. But Q3 revenue was 1.7% below Q2 and Q4 is guided flat, so the story has shifted from "how fast is it growing" to "how long does AI-driven test demand stay at this plateau" — and the 51% jump in inventory since December is a bet that it does.

Where the revenue came from

The release splits Q3 revenue three ways:

Semiconductor Test (testers for processors, memory and other chips) is still the business. The release names memory test as a record, which matters because high-bandwidth memory (HBM, the stacked memory packed next to AI processors) needs much more test time per chip than ordinary memory. Integrated Systems Test, also a record, covers equipment that tests hard disk drives and complete electronic systems; the CEO lists hard disk drive test and high-speed interconnect among the areas where AI demand showed up.

Robotics posted its highest third-quarter revenue to date at $96 million, and the release says it "achieved profitability." The release does not give a year-ago segment breakdown or segment profit figures, so the growth rate of each segment and the size of Robotics' profit will only be known when the 10-Q is filed.

Costs: where the margin came from

Gross margin (revenue minus the direct cost of building the product, as a share of revenue) barely moved, 59.1% versus 58.4%. So the jump in operating margin did not come from higher prices or cheaper production; it came from spreading overhead over far more sales.

• Engineering and development rose 30.7% to $163.1 million.
• Selling and administrative rose 17.6% to $199.0 million, including $3.7 million of costs for a new ERP (company-wide accounting and operations software) system.
• Total operating expenses rose 21.5% to $369.3 million, against 69.8% revenue growth.

Sequentially the leverage worked in reverse: revenue fell $23 million from Q2 while operating expenses rose $12.5 million, so operating margin slipped from 32.9% to 30.8%. That was the pattern our Q2 analysis flagged, an expense base that keeps growing while revenue levels off.

What the headline numbers hide

The GAAP-to-adjusted gap is small and the exclusions are ordinary. Teradyne's non-GAAP EPS of $2.29 is $0.12 above GAAP $2.17. The difference is amortization of acquired intangibles ($5.3M) and of its investment in Technoprobe, a probe-card maker it holds a stake in ($7.6M), ERP costs ($3.7M) and restructuring ($2.0M), less tax effects. These are mostly non-cash or small; none of them hides a recurring operating cost of any size.

No one-offs flatter the comparison. Restructuring was smaller this year ($2.0M versus $6.6M), but that difference is worth about $0.03 a share. Pretax income rose 173%, close to the 186% rise in net income; the remaining gap comes from a slightly lower tax rate (14.8% versus 15.8%) and an $8.5 million swing in Teradyne's share of the affiliate's results (a $3.3M gain versus a $5.2M loss). A new $5.3 million slice of profit now goes to minority partners (non-controlling interests) in a business Teradyne does not fully own, which slightly reduces what reaches Teradyne shareholders.

Buybacks did little of the work. Diluted shares fell 1.0% from a year ago, so almost all of the 189% EPS rise came from higher profit, not a smaller share count. Teradyne spent $99.3 million on buybacks and $20.3 million on dividends in the quarter.

Cash conversion is reasonable, but working capital is swelling. Operating cash flow was $313.6 million against $347.7 million of consolidated net income (90%); for the nine months it was $1,047.9 million against $1,121.5 million (93%). That held up only because Teradyne paid suppliers more slowly: accounts payable and other liabilities added $225.8 million of cash in the quarter, offsetting a $170.9 million inventory build and $165.3 million more in prepayments. Since December 31, inventory is up 51% to $575.0 million, prepayments are up 44% to $613.7 million and receivables are up 41% to $1.11 billion. Nine-month revenue rose 86%, so receivables are in line with sales, but the inventory build came in a quarter when revenue fell slightly and ahead of a flat Q4 guide. The provision for excess and obsolete inventory also rose to $10.9 million from $3.6 million in Q2. None of this is a problem while demand holds, but it is money committed on the assumption that 2027 orders arrive.

Guidance came in above the old range. Q3 revenue of $1,306 million topped July's $1,200–1,300 million range, and GAAP EPS of $2.17 topped the $1.79–2.09 range.

On balance the quarter is clean: EPS growth came from operations (sales up 70% on costs up 21%), with only a 1% lower share count, a one-point lower tax rate and an $8.5 million affiliate swing helping at the edges.

Did last time's read hold up?

Our Q2 analysis expected EPS to fall more than revenue in Q3 and named three things to watch: memory test staying strong as HBM ramps, whether higher engineering and sales spending would hold up the top line, and whether Robotics could reach breakeven. Revenue fell 1.7% and EPS fell 8.8% from Q2, so profit did fall faster than sales, though by far less than the guidance midpoint implied (about 18%). Memory test set a record, though the release gives no figure to check against the $200 million mark. Robotics, the third item, reached profitability this quarter, according to the release.

Balance sheet

Teradyne repaid the $200 million of short-term debt it carried at year-end and now has no borrowings. Cash and marketable securities were $624.9 million (cash $460.7M plus $5.8M current and $158.3M long-term securities), up from $448.3 million at December 31. Shareholders' equity rose to $3.69 billion from $2.80 billion.

Outlook

Management's guidance for Q4 2026:

• Revenue of $1,250–1,350 million, a midpoint of $1,300 million, about level with Q3's $1,306 million.
• GAAP EPS of $1.88–2.18; non-GAAP EPS of $1.95–2.25.

CEO Greg Smith: "With multiple growth engines across test and robotics, we approach 2027 with a more diversified business and an expanding set of opportunities."

Our read. At the midpoint, Q4 GAAP EPS of about $2.03 would be 6% below Q3 on flat revenue, which again implies costs rising faster than sales. Teradyne has now run at $1.3 billion a quarter for two quarters, about 70% above a year ago, and the guide says the third will look the same. Chip-test demand is lumpy and concentrated in a few large customers, so a flat stretch is not a warning in itself. The things to watch are the 10-Q's segment detail (how much of Semiconductor Test growth is memory versus compute, and how profitable Robotics actually is), whether the $575 million inventory pile turns into Q4 and early-2027 shipments rather than write-downs, and whether operating expenses keep growing near 20% a year while revenue holds steady, which would squeeze the margin back below 30%.