Thank you for joining us on today's call. If you've not already seen our earnings press release and management report for the first quarter, please go to the Investors section of our website where each has been posted.

For today's call, I will provide a summary of the past quarter, our perspective on the environment, and outlook for the remainder of the year. The first quarter was a good start to the year as we made solid progress on our objective to position PDF Solutions as the leading commercial data analytics and mission-critical platform for the semiconductor industry.

This was visible in the nature of the bookings, business activity, and our product development during the quarter. From a bookings perspective, Exensio and Cimetrix products were particularly strong.

Exensio's strength was primarily from larger deployments, including an enterprise-wide deployment for Exensio Test at a large IDM. Cimetrix booking strength came in part from our larger customers placing orders for runtime licenses in anticipation of additional machine shipments in future quarters.

Total revenues were up 26% compared to Q1 of the prior year. Adnan will provide revenue details in his prepared remarks.

We shipped one eProbe in the quarter, and anticipate that machine to begin contributing to revenue in Q2. Our capital investments in eProbe was meaningful in the quarter as we build additional machines to support our goal of shipping six machines this year.

Selling activity was very high across all aspects of the semiconductor industry, from hyperscalers to equipment vendors. We did see significant activity in our Characterization and DFI business as customers look to develop advanced processes and products.

We anticipate that this activity will result in strong bookings in this category as the year progresses. Development of our new AI-enabled Exensio Analytics Systems that we announced at our users conference in December 2025 remained on track in Q1, and we anticipate beta release in the third quarter.

Customer interest has been very high for this capability. In the quarter, we celebrated our first anniversary with SECUREwise as a part of PDF Solutions.

Our SECUREwise system provides secure end-to-end remote access and monitoring for manufacturing equipment, enabling the equipment companies to provide better support and advanced services for the equipment installed at fabs all over the world. During the past year, we invested in R&D to improve the product and services, expanded the customer base to include fab owners, not just equipment makers, and now are expanding the network into the OSATs and fabless.

As collaboration in the chip industry moves from being driven by humans to being led by AI, we believe that remote connectivity enabled by SECUREwise will increasingly be important. Customer enthusiasm for our stewardship of SECUREwise has been super.

Overall, it was a strong start to the year, both in terms of our traction with the customers and our product development. Now let's turn to our perspective on the environment.

I believe this is my 100th quarterly conference call with investors, and as I reflect on my tenure having the honor and opportunity to serve our stockholders, customers, and employees, I realize that this is the most interesting time that I've ever seen for the industry and PDF in particular. I don't say that lightly, and in fact, I've never said that before.

Over the years, we have experienced many semiconductor cycles. Each time we are told this one is different.

I have little doubt that this cycle can overshoot like all the past ones. What is different this time is how AI is changing so dramatically the way engineering is being performed everywhere.

A recent business trip in Asia this past quarter highlighted that for me. What I found interesting was that in eight of the nine customer meetings, the CEO attended, and he was very interested in learning how AI is being used in R&D and manufacturing across the industry from PDF's vantage point.

The inference that I drew from this is that executives realize that AI is having the most profound effect on how companies operate and may result in changing the nature of the industry and hence companies. These CEOs see PDF as a leader in bringing AI to manufacturing, and they want to understand our perspective on the transformation that is happening and our vision for manufacturing, product and test engineering, and yield ramp as a result of AI.

What this means for PDF is that this is the most interesting business environment we have experienced in our 25 years as a listed company. As the PDF platform transitions from a system used within a company to increasingly an AI and analytics platform used across the industry, we believe we can deliver and capture more value as we help our customers seize on the opportunities that our platform can provide them.

This is resulting in deeper collaborations with our customers, and ultimately can result in larger engagements with them. Given our progress in Q1, we reconfirm our total year-over-year revenue growth for this year to be consistent with our 20% long-term target.

I want to thank all the PDF customers, employees, and contractors for their efforts during the quarter. Now I'll turn the call over to Adnan, who will review finances and provide his perspective on our results.

Adnan?

Thank you, John. Good afternoon, everyone.

Good to speak with you again today, and I hope all of you and your families are well. We're pleased to review the financial results for the first quarter of 2026.

As mentioned, our earnings release and a management report are posted in the Investor Relations section of our website. Our Form 10-Q was also filed with the SEC today.

Please note that all of the financial results we discuss in today's call are on a non-GAAP basis, and a reconciliation to GAAP financials is provided in the materials on our website. We are pleased with the results of Q1, with multiple large bookings during the quarter.

We secured a double-digit million-dollar Exensio Test Operations booking to help our customer manage geographically distributed operations, an Exensio renewal with a large fabless customer for better analytics, and a booking for fab control software for a large fab customer in Asia. We ended the quarter with a backlog of $246 million, up 9% versus the same quarter of last year.

Total revenue for the first quarter were $60.1 million, up 26% versus the same quarter of last year. Our platform revenue was $50.9 million for the quarter, or up 36% versus the same quarter of last year, driven by strength in our leading-edge solutions, Exensio software, and one complete quarter of SECUREwise revenues.

Volume-based revenue for this quarter was $9.2 million, or down 12% versus the same period of last year, primarily due to lower gainshare. Our gross margin for the first quarter came in at 76% versus 77% last quarter, driven by small increase in cost of revenue with a smaller revenue base, as expected.

Our operating margin for the first quarter came in at 25% versus 24% for the prior quarter and 18% for the same quarter a year ago. We're pleased that on a dollar basis, we generated approximately $15 million of operating profit this quarter, slightly higher than operating profit during last quarter, and 75% higher than the $8.6 million operating profit in the same quarter of last year.

We remain cognizant of our long-term target operating margin of 27% and continue to make meaningful progress towards that goal. Before we updated our long-term targets in December 2025, we had achieved our prior long-term targets set in 2023 within 2 years of setting those prior targets.

As we reflect on our current target model of 27% operating margin and achievement of 24% during Q4 of 2025 and 25% for Q1 of 2026, we are happy to note that we are making faster progress towards our long-term targets than the last time. Net income for the quarter totaled $12.6 million, or 31 cents per share, compared to $8.1 million, or 21 cents per share, in the same quarter a year ago, or up 56% for net income and 48% for EPS on a year-over-year basis.

We anticipate improvements in EPS as we approach the long-term model due to the scale the business is achieving as our costs to operate the business are rising slower than our revenues. Turning to the balance sheet, we ended the quarter with cash, cash equivalents, and short-term investments of $31 million, compared to $42 million at the end of the prior quarter, with the change primarily driven by approximately $10 million used for capex needs, related primarily to building eProbe systems and fulfilling the customer demand we have spoken about.

Given the demand we're seeing, we expect to increase our capex spend for this year versus last year, balanced by customer collections, such that we expect to grow our cash balance over the coming quarters, particularly the second half of the year. After the quarter closed, we also expanded our revolving credit facility and have $30 million of unused revolver credit facility now available for use by the company as needed.

As we look to the rest of the year, we reiterate our expectation that 2026 revenue will grow year-over-year, consistent with our 20% long-term revenue growth target, and that we will make meaningful progress towards our long-term target margin operating models of 27% with gross margin of 77%. With that, let me turn the call over to the operator for Q&A.

Operator?

Thanks guys. Nice quarter.

John, maybe if you could give us a little more color on how you're doing with the eProbe, particularly around new customers. What's that pipeline looking like?

You said you were on track for about six shipments this year. How much of that is net new customers?

We expect about a third of them to end up at net new customers and the others to be repeat orders on existing customers and maybe not all of them directly contributing to revenue this year. One of them will be a demo machine.

Probably five of the six will be revenue generating, one will be demo, two will be at new customers, the other four should be at existing customers. At least as it looks now.

Looking ahead to 2027, I know it's only May here, but how are you thinking about how the pipeline's developing for next year?

It's a great question. We do see quite a bit of interest.

We are trying to build as many additional machines as we can, right? We've committed to six.

We are looking to see what we can do about additionals. We do have interest to be able to ship additional demo machines, and it is gated by how we look at executing.

What we don't get to this year will start serving next year.

Great. Then just on the SECUREwise, how is that pipeline developing on that side of the business now that you've had it for a year?

Yes,

thank you. A couple of things have happened.

As I mentioned in my prepared remarks, we started providing service directly to the fabs. What we found was fabs also have people all around the world, and the security features that SECUREwise provides, the ability to have a log of who was looking at what data when and what machine when, auditable for a couple of years is very valuable even when it's within the same company.

Starting last year, we started selling to the fabs. At our user conference, Intel talked about how they standardized on SECUREwise.

What that's also done is gotten a lot of the equipment vendors who, when we bought the company, the largest equipment vendors of the world were the heaviest users of data for SECUREwise and also the biggest customers, because they had developed the most services, usually related to AI, that provided value by taking the data from the machines, analyzing it at headquarters, and providing back updated models and value-added capabilities. Every equipment company wants to be able to do that.

I think the Intel announcement gave a number of other equipment companies the realization that this was going to become more available. We've started picking up and have a quite a deep pipeline to expand the business with what I would say is SECUREwise Classic, the business with the equipment vendors.

Also, we've been picking up more business with the fabs. As I said in my prepared remarks, more recently, as we look at the OSATs and the fabless and even the foundries as they go out to those facilities, we start getting interest in people connecting front end to back end as advanced packaging becomes more important, back-end packaging to the fabless as the testing and production's becoming more important.

We've got pilots ongoing to bring SECUREwise out to that part of the community, too, leveraging on the fact that we already had Dex services there, which was our own historical system, to many of the OSATs as well. It's been a natural extension to bring the SECUREwise additional capabilities it provides out to that part of the market, and now we're going into that.

That's kind of our big activity for the second year of our stewardship of the product.

Great. Thanks very much.

Awesome, thank you. I would just like to start maybe the question for Adnan here around the capex guidance that you brought up with the step-up that we saw in 1Q.

Could we maybe parse through if that's demand-driven, where you're seeing capex upfront in order to supply eProbe systems later this year, or if there's anything that's more related to the long-term objectives of that business?

I think as you have heard our prior remarks, and us confirming today one out of the six machines that we targeted for this year getting shipped. If you looked at our installed base, and we have spoken about six machines through the end of last year, and then shipping six this year, that's a meaningful step-up that we are trying to get to this year.

That spend is to make sure that we are positioned well to meet that demand. Somewhat of it is starting to think about the future, but it's mostly related to the current demand that we are needing to meet for this year.

Got it. Then additionally, last year 53% of revenue came from the top three customers based on your disclosures in the 10-K.

Can you provide any color on the conversations you're having right now? You referenced numerous times the points around demand and interest.

How you expect these large relationships to grow this year, and if there's any upside potential opportunities within that customer base?

Sure. It's an 80/20 rule, right, that the top 20% drive a high percentage of the bookings volume typically, and we expect that again this year.

You are correct that it is broadening in terms of the number of types of customers. Before we had SECUREwise, very few of the equipment companies were on our top 20 list.

Now we have equipment companies in the top five list, and that is growing quite meaningfully. Also, we see with what we're doing with Exensio a lot of opportunity to expand in the, I would say, the core fabless and merchant semiconductor IDM list.

We do expect this year the bookings to broaden out. We do have a couple of customers that are very large significant customers that we do expect renewal bookings this year, too.

The exact ratio, Clark, I'm not so sure about, but I think the volume of bookings this year will have a mix of maybe weighted a little bit more in terms of numbers of newer significant customers. In terms of dollars, probably the repeat customers maybe some of the bigger dollar amounts.

Got it. That's helpful.

Then one last thing as I was going through the Q, I just wanted to kind of understand the margin implications. Looks like gainshare and band test revenues were down year-over-year.

Just trying to understand if the margins we see today would benefit from increased share there or if you're not expecting any additional gainshare revenue going forward, or at least in the gross margin?

The volume-based part of the business is the least in our control. How customers ship volumes, how much data they use, and how much wafers they ship.

That is a relatively volatile. We don't put that in our backlog, right, yet we know it's always going to be there.

When that's significant, it does really help with our gross margins. Obviously, to achieve the 76% gross margin that we achieved this quarter while that number was down really speaks to the overall scale of the business overall, and why we believe we can meet or exceed the 77% long-term target maybe in shorter time than the typical three-to-plus years that people typically set for a long-term target, and recognize we just set that target in December.

The way we looked at it was we know people will be shipping. We will start seeing those volume-based numbers go back up, and as they come back up, as well as the scale in the rest of the business, we do expect to meet and exceed our gross margin targets.

Got it. Thank you.

I'll step back in the queue.

Hey guys. This is Ben Taxdahl Taksen on for Christian Schwab here.

Great quarter. I just want to go back to those targets and tracking a little bit earlier than expected.

I know you just mentioned it's early still, but could we kind of expect getting to those targets to be a '27 event or could it be a little bit longer?

Our 2023 targets were 20% revenue growth, 75% gross margin, 20% operating margin. Within 2 years by 2025, really just in Q4 of 2025, we exceeded all those numbers, I believe.

It was the first year that we exceeded them. We then set new targets, were again 20% revenue growth, but now on a much bigger base, 77% gross margin, and 27% operating margin.

I think people were surprised at the big jump up in operating margin going from 20 to 27%, while gross margins were going from 75 to 77. That was in part because as we start getting scale, we felt that the R&D leverage you start getting becomes significant.

The G&A leverage you start getting becomes significant. Now if you look at the first couple of quarters, right, we're now at let's say 24, 25% that operating number, we've made reasonable progress to that 27%.

We're at 76%, we've made some progress from 75 to 77. We're starting to get there as well, and we do think we can get there sooner than the typical 3 years, and probably sooner than we did the last time.

How much sooner, we're not quite ready, Ben, to say how much sooner. We'll see how the remainder of the year progresses.

We're super confident that this will come in strong and quickly. It's not going to take us typical 3 years for a long-term model.

Okay. Great, great.

Then one question, one more on eProbe. You talked about the six this year.

Where could that be in '27, '28 or how big of an opportunity could this be over a multi-year period? A little bit more color on that.

Yeah. It's a question that we're getting our own hands on.

What I can tell you, Ben, is right now the majority of machines are subscribed, and we expect them to stay subscribed over that time period anyway. What that means is that it's not like a capital purchase where we have to go and start from zero every quarter.

We build from that base. Our base exiting last year was six machines, but five of the six on a subscription.

We expect to end this year with approximately double that on a subscription basis, about 10 of the 12, one in demo and one that was purchased. That means that we keep on building that foundation.

If we can sustain modest growth in the number of machines we ship each year, we can get substantially more revenue growth, right, than that because the majority of previous machines are still contributing revenue. We do believe as you look out over '27 and '28, even if all we do is maintain this level, the eProbe continues to be a very important part and growing part of the business.

Now we think the total market for e-beam has been talked about by others is the fastest growing inspection product category in the front end because some of the defects now are three-dimensional in nature, and e-beam is the most efficient way to look at 3D defects. We feel we have very unique capability there.

The overall market's quite substantial. Depending on who you listen to, it's on the order of a billion-dollar market.

You'd have to flip that to a subscription market versus a perpetual market, you might look at that a little bit differently if you model that on a subscription basis. It would stack up over time, and it is a meaningful market.

Great, great. Thanks, guys.

Hi, there. I just wanted to jump back in and just ask one on the leading edge players in your relationships with those.

I know during the Investor Day that was a point of emphasis that you're making from a go-to-market perspective. Could you provide any update on the initiatives that you're putting in action in order to gain share with those fab players in the broader ecosystem?

Sure, Clark. A few things, and a previous question that Ben had about the eProbe is a significant part of it.

It's a big emphasis there. The eProbe tie-in to design is increasingly important for our customers.

They'd like to understand exactly when the eProbe finds things, exactly what about the design made that interact with the process. It's some AI capabilities that we're building into the eProbe for that.

Customers love that. Because the eProbe has to grok the entire design, not just the layer it's looking at, but how that layer's connected to every other layer.

Secondarily, in my prepared remarks, I talked a little bit about AI integration with Exensio and the releases that we're making this year. One of the targeted areas is the ability to interpret and understand the data coming off our test vehicles.

The test vehicles are in the industry probably the most widely used and very detailed. They have thousands of experiments in them.

Of course, the engineer has to know how to go through and look through all of that, and obviously, you can see how AI could play a very important role there to find the critical signals, interpret that, tie it in to layout. The way that we're going back and showing customers why they want to do more with our vehicles and systems is in part that AI integration with the Exensio module called Exensio Char, characterization, that does the interpretation of the CV data, the characterization vehicle data.

Sorry for all the PDF acronyms there. That is a big piece of what we're doing in terms of driving from a product innovation standpoint.

Then lastly, of course, partnerships in the industry, collaborations are always places where our systems turn out to be very valuable because you're able to share data, share analytics, understand how to work together, whether that's SECUREwise, the characterization vehicles, Exensio itself. These are all systems that we provide to customers that are looking to collaborate, and in this environment, more and more collaboration is needed.

It's a great selling environment for us for that capability on the leading edge.

Got it. Thank you.