PDF Solutions (PDFS) Q3 2026 earnings review
PDF Solutions posts record sales, but its contract backlog falls
PDF Solutions, which sells chip-testing tools and data software, posted record sales while its contract backlog shrank. Sales rose 20%, and lower overhead lifted its operating margin, excluding one-offs, past its long-term target. But that backlog, signed work not yet delivered, fell $24 million in three months. Chief executive John Kibarian kept the full-year plan, which by our math leaves about 17% growth for the fourth quarter.
| Revenue | $68.3M +20% from a year ago; +19% without corrections from earlier periods |
|---|---|
| Operating margin, excluding one-offs | 28% 23% a year ago |
| Contract backlog | $247.2M $270.7M in June |
| Full-year sales outlook | Unchanged 20% growth |
⚖️ Verdict: ⚪ Neutral
The story is unchanged, because stronger profits and a smaller backlog offset each other. Unlike the first half, growth did not lean on revenue corrections from earlier periods. The bad news: by our math, finance chief Adnan Raza's year-end backlog target needs about $96 million of new contracts in the fourth quarter.
The question now is whether the large contracts management described sign by December. If they do, 2027 starts with more signed work; if they slip, as Kibarian said some will, it starts with less. Fourth-quarter results will settle it.
🐂 Bull Case
Lower Overhead Lifted Profit Past the Target
Last December, PDF Solutions set long-term goals of a 27% operating margin and a 77% gross margin, both excluding one-offs. Gross margin is the share of sales left after the direct cost of delivering products.
The chip-software group passed the first goal in the third quarter by holding down overhead. Sales grew 20%, but selling and administrative costs rose only 5%. Finance chief Adnan Raza credited the gross margin recovery to "a reduction in the eProbe-related costs compared to last quarter".
- Operating margin, excluding one-offs: 28%, against 23% a year ago
- Selling, general and administrative costs: down 4.2 percentage points of revenue
- Research and development: up 1.4 percentage points of revenue
- Gross margin, excluding one-offs: 77%, against 73% in the second quarter
This matters because overhead grows slowly as sales rise, so the gain can hold. Gross margin is less settled, because eProbe, PDF's electron-beam machine for finding chip defects, carries hardware costs. Raza placed the fourth quarter "somewhere between the 75% and where our target margin model is".
What to watch: gross margin in the fourth-quarter results, when PDF aims to ship another eProbe machine. A reading near 77% alongside a shipment would show the hardware no longer lowers profit.
Equipment Software Grows With Machine Shipments
PDF Solutions sells two products to the makers of chipmaking machines. Cimetrix software connects each machine to factory systems, and secureWISE lets equipment makers reach their tools inside customer plants. Chief executive John Kibarian said: "The equipment business is now about 20% of the total business."
By Kibarian's own account, that unit grows in the high teens, slightly below PDF's 20% pace. Cimetrix had "another record quarter as our customers increased tool shipments", he said. Volume-based revenue, the fees tied to machines shipped and data sent, rose 10% even though a large secureWISE contract moved into fixed subscription fees.
What to watch: volume-based revenue in the fourth quarter. Kibarian said Cimetrix license sales track equipment spending, so a drop would show machine shipments slowing.
A Repeat Buyer Ordered Another eProbe Machine
eProbe is PDF Solutions' electron-beam machine for finding chip defects during production, and PDF sells or leases it to chipmakers. An existing customer signed an eight-figure contract for another machine and a matching test chip, chief executive John Kibarian said.
Kibarian said another customer now runs several machines, and customers often run them at "over 80% or 90% utilizations". The group also runs a memory-chip pilot at a customer. Production is the constraint: Kibarian said building the next machine this year "will be tight". Purchase commitments to suppliers reached $67.9 million, from $54.5 million in June.
What to watch: the eProbe shipment count for 2026, which management has not given. A count near the six machines planned for the year would show production keeps up with orders.
Positives this quarter didn't test
Two projects PDF Solutions promotes heavily produced no revenue figures this quarter. Each still needs a first paid result before it can count toward growth.
- Exensio Aurora, new analytics software built "to handle semiconductor manufacturing data at petabyte scale": launched in September, with "mostly demo-related feedback" so far, Kibarian said; the first paid upgrade and its price would move the case.
- secureWISE, PDF's remote-access service for chip machines, at more factories: Kibarian expects a very good 2027 as newly shipped machines connect; new factory customers signing in the fourth quarter would move it.
🐻 Bear Case
Backlog Shrank While Sales Hit a Record
Backlog is the value of signed contracts PDF Solutions has not yet turned into revenue. Finance chief Adnan Raza said he still expects to "close the year with backlog above the $271 million backlog we saw for second quarter".
Instead, backlog shrank during the third quarter. Chief executive John Kibarian reported strong bookings for test chips and eProbe defect-finding machines, but new contracts, by our math, covered only about two-thirds of revenue.
- Backlog: $247.2 million, against $270.7 million in June
- New contracts per dollar of revenue: 0.66 by our math, against 2.04 a year ago
- Needed in the fourth quarter to top June's level: about $96 million of new contracts, by our math
This matters because the full-year sales plan leans on the same backlog. By our math, fourth-quarter revenue of about $73 million would use nearly 30% of September's backlog, more than any recent quarter. Kibarian said some of the large deals "will probably spill into Q1 next year".
What to watch: year-end backlog in the fourth-quarter results. A figure above $271 million would show the large deals signed on time and the sales plan rests on real contracts.
Two Customers Supplied Almost Half of Sales
PDF Solutions sells to a few very large chipmakers. Two unnamed customers supplied 46% of third-quarter revenue, the quarterly filing shows, and one, Customer B, more than doubled its share to 26%.
Growth also leaned on one-off sales. Upfront revenue, booked at once from machines, permanent licenses and test-chip designs, made up 12% of sales against 5% a year ago. Recurring revenue therefore grew about 11%, by our math. One worry eased: corrections from earlier periods trimmed sales by $0.6 million, so they did not inflate growth this time.
What to watch: the largest customer's share of 2026 revenue in the annual report. A share above a quarter of sales would leave growth resting on one buyer's plans.
Cash Fell Despite a Plan to Grow It
PDF Solutions spends heavily to build eProbe machines, its electron-beam tools for finding chip defects. Finance chief Adnan Raza recalled saying on the previous call that "we would expect to grow the cash from that point onwards".
Instead, cash fell by about $8 million, to $107.1 million. Capital spending took 22% of revenue, double its share a year ago, and exceeded the cash the business generated.
Raza still said positive free cash flow is "the right direction to think about for the whole year". By our math, nine months produced about −$7.8 million, so the fourth quarter needs about $23 million of operating cash.
What to watch: year-end cash in the fourth-quarter results. A balance below June's level would mean cash did not grow as Raza expected.
Risks this quarter didn't answer
Three standing concerns produced new figures this quarter but no resolution, so each still waits on a specific event or number.
- China and the SMIC award: Chinese revenue nearly doubled to $11.1 million, while SMIC, a Chinese chipmaker that lost an arbitration case to PDF over unpaid fees, asked a Hong Kong court to set the award aside; the ruling would move it.
- Volume-based fees, tied to machine shipments and data use: they fell 19% from the second quarter as a secureWISE remote-access contract moved to fixed fees; a quarter of growth with no such shift would settle it.
- Buybacks: the $50 million repurchase plan the board approved in May sat unused after the May share sale; any repurchase, or a second share sale, would move it.
👓 Other Themes
Chip Spending Is Spreading Beyond the Newest Plants
Kibarian said industry growth has spread "more broadly across many technologies" beyond the most advanced chips. He tied part of it to countries building chip plants at home, from Japan and the US to Europe and India. PDF said in its filing that it expects the near-term effect of US export limits on its business "to be limited".
💲 Other KPIs
Customer prepayments jumped. Current deferred revenue, cash paid for work not yet delivered, rose 54% from a year ago. It reached 48% of quarterly revenue, the highest share in five quarters. The timing matches a new subscription deal for secureWISE, PDF's remote-access service for chip machines, so it supports coming revenue.
Revenue PDF has earned but cannot yet bill more than doubled. Contract assets, revenue recognized before the customer owes payment under contract terms, reached $27.7 million, against $11.3 million in December. The filing ties the rise to revenue recognized this year. Until billing, that revenue brings in no cash.
The diluted share count rose 8.5% from a year ago. Most of the increase came from 1.9 million new shares PDF sold in May. Employee stock awards added the rest. Because profit is spread over more shares, profit per share, excluding one-offs, rose 60% while the matching net income climbed about 75%.
🔮 Guidance
Unchanged. The plan still calls for 20% sales growth this year, a target Kibarian based on results so far and "the pipeline for the fourth quarter". By our math, that leaves about $73 million for the fourth quarter, a 17% gain on a year earlier. That would be the slowest quarter this year, because last year's fourth quarter set a record. PDF met or beat its last two full-year targets.
New. Raza expects fourth-quarter gross margin, excluding one-offs, between 75% and the 77% long-term target. The middle of that range sits one point below the third quarter. eProbe machines, PDF's electron-beam defect-finding tools, carry hardware costs, so each shipment weighs on the margin. Raza said product mix could move the figure in coming quarters.
Unchanged. Raza still expects backlog, signed work not yet delivered, to end the year above June's level. By our math, that needs new contracts worth about 1.3 times fourth-quarter revenue, a pace last reached in the second quarter. Kibarian said a handful of large deals are pending, and some will probably slip into 2027.
Unchanged. Raza still expects positive free cash flow, the cash left after capital spending, for the full year. That needs far more operating cash in the fourth quarter than the third produced, because capital spending stays close to its peak. Kibarian said much of this year's spending builds machines that will earn revenue in 2027.
New. Raza said the third quarter's $15.1 million was the year's high and the fourth quarter should be at or below it. Most of the money builds eProbe defect-finding machines. Kibarian said PDF plans to build more machines next year than this year, so spending is unlikely to fall far.
❓ Key Questions
Which large contracts must sign before year-end?
By our math, lifting backlog above June's level needs about $96 million of new contracts in the fourth quarter. Kibarian said a handful of large deals are pending and some may slip into 2027.
How many eProbe machines has PDF shipped this year?
Management described a new contract and repeat buyers but gave no shipment count for 2026. The count shows whether production, which Kibarian called tight, can support next year's larger build plan.
How much revenue came from one-off hardware sales?
Upfront revenue rose to 12% of sales from 5% a year ago. PDF does not report eProbe revenue or its margin, so readers cannot separate lasting subscription income from one-time machine sales.
Can fourth-quarter cash flow cover capital spending?
Raza still expects positive free cash flow for 2026, but cash fell in the third quarter. The fourth-quarter operating cash figure will show whether the business can fund its machine building.
Will Customer B keep spending at this level?
One unnamed customer supplied 26% of third-quarter revenue, up from 12% a year ago. If that came from one machine or contract, revenue could drop when it does not repeat.