Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Thanks, Ashish, and good afternoon, everyone. For the third quarter of fiscal 2025, Marvell delivered revenue of $1.516 billion, $66 million above the midpoint of guidance, growing 19% sequentially with the outperformance driven by strong AI demand and execution. As a result, our non-GAAP earnings per share of $0.43 was also well above the midpoint of guidance, growing by 43% sequentially. This earnings growth rate, which was more than double our top-line growth rate, highlights the substantial operating leverage in our business model.

Stronger-than-forecast ramp in custom silicon was a key contributor to this performance. We believe that continued success in custom silicon will help accelerate our timeline to achieve our long-term target operating margin model. On a year-over-year basis, third quarter revenue grew by 7%, marking a return to year-over-year growth for Marvell. I'm very pleased with our results and even more excited about our outlook for the fourth quarter, where we project revenue growth to accelerate to 26% year-over-year growth at the midpoint of guidance.

Marvell is entering a new era of growth through the substantial volume production ramp of our custom silicon programs, along with continued strong growth in optics. Yesterday, we announced the expansion of our strategic relationship with Amazon Web Services through a comprehensive multi-generational five-year agreement. This multi-generational agreement encompasses a broad range of Marvell's data center semiconductors, including custom AI products, optical DSPs, active electrical cable DSPs, PCIe retimers, data center interconnect optical modules, and Ethernet switching silicon solutions. Additionally, Marvell will collaborate with AWS for EDA in the cloud, leveraging the advanced and scalable compute capabilities of AWS to accelerate silicon design.

This agreement represents a significant step-up in the expected volume of business between the two companies in the coming years. And we look forward to working with AWS on custom AI and networking semiconductors that meet the demanding needs of accelerated infrastructure. Let me now discuss our results and expectations for each of our end markets. In our data center end market for the third quarter, we achieved record revenue of 1.1 billion, growing 98% year over year and 25% sequentially.

These strong results were driven by a significant step-up in our custom AI silicon ramp, as our customers saw increasing demand for the differentiated capabilities offered by these new custom AI chips. We are seeing strong custom AI demand continue into the fourth quarter and have secured supply chain capacity to support our customers' growth forecast. Our success in ramping these highly complex, 100 billion-plus transistor chips from initial samples to high volume production on first-pass silicon without any respins is a testament to Marvell's robust design methodology and world-class engineering team. Our seasoned operations team and deep partner relationships were key enablers of the rapid ramp we were able to drive in a constrained supply environment.

The superb execution is a significant time to market advantage for our customers and has given them even more confidence to expand their collaboration with Marvell on their critical silicon projects. In the third quarter, we benefited from higher-than-forecasted revenue from our electro-optics products, which grew double digits sequentially on a percentage basis. We continue to see strong bookings for our market-leading 800-gig PAM products, and we also began shipments of the industry's first 1.6T PAM DSP and five-nanometer process technology. We continue to see a strong design wind momentum with leading customers for this product and expect the production ramp to accelerate next year.

To meet AI's insatiable need for the highest bandwidth at the lowest power, Marvell is accelerating the cadence of next-generation products. Today, we announced the industry's first three-nanometer 1.6T DSP, featuring 200-gig-per-lane electrical and optical interface. By leveraging three-nanometer process technology and advances in electrical and optical SerDes, this next-generation platform is designed to reduce 1.6T optical module power consumption by more than 20% compared to its predecessor, marking a significant improvement in energy efficiency. Marvell's DSP team remains laser-focused on driving best in class performance, schedule, and time to market to continue to remain the leader in this large and fast-growing electro-optics market.

In the active electrical cable market, we are starting to see an acceleration in the production ramp of our 100-gig-per-lane 800-gig DSPs with multiple module partners. We have also started sampling the industry's first 200-gig-per-lane 1.6T AEC DSPs to address upcoming higher-speed, short-reach copper interconnect applications. Looking ahead to the fourth quarter of fiscal 2025 for our data center end market, we are forecasting strong sequential growth in the low to mid 20% range. We expect this growth to be driven by another significant step-up in our custom AI revenue as these programs continue to ramp into high volume production.

This will be further augmented by strong growth from both our Ethernet switch products, as well as our interconnect portfolio, which include optical DSPs, TIAs, drivers, AECs, and DCI products. Now, let me turn to Marvell's enterprise networking and carrier end markets. In the third quarter, enterprise networking revenue was 151 million, while carrier revenue was 85 million. We began to see a recovery in both of these end markets, with revenue collectively growing 4% sequentially.

We expect the pace of recovery to accelerate in the fourth quarter with aggregate revenue from enterprise networking and carrier infrastructure forecasted to grow sequentially in the mid teens on a percentage basis. We are pleased to see our revenue growth and order momentum continue to improve in these two end markets, although this forecast still anticipates Marvell products shipping below end market consumption. Turning to the consumer end market, revenue in the third quarter was 97 million, growing 9% sequentially. Looking ahead to the fourth quarter, we expect revenue from the consumer end market to decline sequentially in the mid teens on a percentage basis.

This is due to seasonality and gaming demand, which typically weakens in our fourth quarter, bottoms out in our first fiscal quarter, and then begins to rebound in the second quarter. Turning to our automotive and industrial end market, revenue in the third quarter was 83 million, growing 9% sequentially as we started to see a recovery in this end market. Looking ahead to the fourth fiscal quarter, we are projecting revenue from the auto and industrial end market to grow sequentially in the low to mid single digits on a percentage base. In summary, the Marvell team delivered excellent results in the third fiscal quarter, achieving 19% sequential top-line growth and delivering both revenue and non-GAAP earnings per share well above the midpoint of guidance.

For the fourth quarter, we are forecasting consolidated revenue to again grow 19% sequentially at the midpoint of guidance. AI continues to lead the way, enabling our data center revenue to almost double year over year in the third quarter, and we expect it to continue driving strong growth in the fourth quarter. With three quarters of strong AI results under our belt for this fiscal year and an even stronger fourth quarter forecast, we are clearly set to significantly exceed the full year AI revenue target of 1.5 billion outlined earlier this year at our AI event. Over the past several years, Marvell has strategically invested in technology, both organically and through acquisitions, to become a critical enabler of accelerated infrastructure.

We have in place a full suite of solutions across data center interconnect, switching, and compute, and the ability to uniquely stitch these together into a unified platform. Marvell's data center end market has grown to account for 73% of our consolidated revenue in the third quarter, driven by AI, and we expect this percentage to increase again in the fourth quarter. Marvell has rapidly transformed into an AI-first data center semiconductor company. And we are completely focused on taking full advantage of our strong position in the AI super cycle.

In the third quarter, we made decisions to further solidify and purposefully redirect our investments toward data center relative to our other end markets. These actions resulted in a restructuring charge in the third quarter, which Willem will discuss in his section. The goal of these actions is to increase our R&D intensity toward the data center, our largest and fastest-growing opportunity, while continuing to drive significant operating leverage going forward. AI technology is advancing at a tremendous pace, and the opportunity is expanding rapidly.

We are continuing to enhance all aspects of our comprehensive technology platform, including electrical and optical SerDes, high-speed energy efficient 2D and 3D dye-to-dye interconnects, advanced packaging, and silicon photonics. In addition, we are optimizing interfaces for high bandwidth memory, SOCs, and compute fabrics. Our two-nanometer platform is also progressing very well as we continue to lead the industry in cutting-edge process technology. Marvell's two-nanometer platform includes our broad suite of internally developed best-in-class IP to enhance performance, energy efficiency, density, and design flexibility.

We are seeing tremendous interest from customers for next-generation two-nanometer designs. Turning to our non data center multi-market businesses, which include carrier enterprise networking, we are encouraged to see the recovery starting to gain momentum. As you may remember, we had invested heavily in these end markets over a long period to successfully gain share and have built an industry-leading portfolio of products. We plan to continue investing in a targeted manner to grow revenue in these multi-market businesses.

The Marvell team is firing on all cylinders, and we see a very favorable setup to significantly scale up the company. In addition to strong revenue attainment, the Marvell team is also driving outstanding financial results. This fiscal year, our revenue has grown by 31% from the first quarter to the third quarter. Over that same time period, we have demonstrated tremendous operating leverage, growing our non-GAAP EPS by 79%, which is 2.5 times our top-line growth rate.

We have driven strong operating cash flows, enabling us to step up our stock repurchases throughout the year. This fiscal year, we have cumulatively bought back 525 million through the third quarter and have plenty of remaining authorization. As you may recall, earlier this year, our board authorized a $3 billion addition to our existing stock repurchase program. We are also focused on reducing our stock-based compensation expenses as a percent of revenue, and we expect significant improvement in this metric going forward.

Given the strong revenue outlook for this fourth quarter and our expectations for robust growth in fiscal 2026, we believe we are well-positioned to deliver outstanding financial returns to our stockholders. Before I turn the call over to Willem, I would like to express my heartfelt thanks to Loi, a key member of my team and co-founder of Inphi. After a long and distinguished career in the semiconductor industry, Loi has announced his decision to retire in April of next year. Loi has made incredible contributions to Marvell over the past few years, including building a world-class team and deep bench of leadership talent.

He was instrumental in the successful integration of Inphi into Marvell in 2021. With his characteristic integrity and thoughtfulness, Loi is already engaged in succession planning and ensuring a smooth transition. We are also looking forward to Loi staying connected with Marvell after he retires so we can continue to benefit from his insights and expertise. We wish him the very best in his well-deserved retirement during which he looks forward to spending more quality time with his family.

With that, I'll turn the call over to Willem for more detail on our recent results and outlook.

Willem Meintjes -- Chief Financial Officer

Thanks, Matt, and good afternoon, everyone. Let me start with a summary of Marvell's financial results for the third quarter of fiscal 2025. Revenue in the third quarter was 1.516 billion, well above the midpoint of our guidance, growing 7% year over year and 19% sequentially. Data center was our largest end market, driving 73% of total revenue.

The next largest was enterprise networking with 10%, followed by consumer and carrier infrastructure at 6% each, and auto industrial at 5%. As Matt mentioned in his prepared remarks, in the third quarter, we made additional decisions to further redirect investments toward the data center. This resulted in an aggregate restructuring charge of 715 million, which is reflected in our GAAP results for the third quarter. The two largest components were impairment charges for acquired intangible assets and certain purchase technology licenses and their future contractual obligations.

I would also note that approximately three quarters of these restructuring charges are noncash in nature and that the aggregate restructuring charges are now largely behind us. These charges are a reflection of the fact that we have invested significantly in updating our enterprise and carrier product portfolios over several years, and we plan on more targeted investments in these end markets going forward. Continuing to our results, GAAP gross margin was 23%. Non-GAAP gross margin was 60.5%, slightly below our guidance as we saw higher than forecasted revenue from custom silicon.

Moving on to operating expenses. GAAP operating expenses were 1.052 billion, including restructuring costs, stock-based compensation, and amortization of acquired intangible assets. Non-GAAP operating expenses were 467 million, in line with our guidance. GAAP operating margin was negative 46.4%, while non-GAAP operating margin was 29.7%.

For the third quarter, GAAP loss per diluted share was $0.78. Non-GAAP income per diluted share was $0.43, $0.03 above the midpoint of guidance. Non-GAAP EPS grew by 43% sequentially, illustrative of the leverage in our business model. Now, turning to our cash flow and balance sheet.

Cash flow from operations in the third quarter was 536 million, growing by a substantial 230 million from the prior quarter. Our inventory at the end of the third quarter was 859 million, increasing by 41 million from the prior quarter, and supports the significant growth we are seeing in our data center end market. We returned 52 million to stockholders through cash dividends. In addition, we repurchased 200 million of our stock during the third quarter, an increase of 25 million from the prior quarter.

Our total debt was 4.1 billion. Our gross debt-to-EBITDA ratio was 2.23 times, and net debt to EBITDA ratio was 1.76 times. As of the end of the third fiscal quarter, our cash and cash equivalent were 868 million, increasing by 59 million from the prior quarter. Turning to our guidance for Marvell's fourth quarter of fiscal 2025.

We are forecasting revenue to be in the range of 1.8 billion, plus or minus 5%. We expect our GAAP gross margin to be approximately 50%. We expect our non-GAAP gross margin to be approximately 60%. For the fourth quarter, we project our GAAP operating expenses to be approximately 710 million.

We anticipate our non-GAAP operating expenses to be approximately 480 million. For the fourth quarter, we expect other income and expense, including interest on our debt, to be approximately 46 million. We expect a non-GAAP tax rate of 7% for the fourth quarter. Please note that we forecast our non-GAAP tax rate in fiscal 2026 to step up to be in the range of 10% to 11% in anticipation of a meaningful year-over-year increase in our operating income.

We expect our basic weighted average shares outstanding to be 867 million and our diluted weighted average shares outstanding to be 877 million. We anticipate GAAP income per diluted share in the range of $0.11 to $0.21. We expect non-GAAP income per diluted share in the range of $0.54 to $0.64. Marvell delivered strong third quarter results, and we are guiding for significant acceleration in our year-over-year revenue growth in the fourth quarter.

We see a strong setup for next fiscal year as well. We remain focused on continuing to drive strong operating average, expanding our operating margins, bringing down stock-based compensation as a percentage of revenue, and efficient cash flow generation to continue to return meaningful cash to shareholders. I'm also pleased with our guidance to return to GAAP profitability in the fourth quarter, and we are looking forward to continue to drive improvement in this metric. Operator, please open the line and announce Q&A instructions.

Thank you.

Questions & Answers:

Operator

[Operator instructions] Your first question comes from Vivek Arya with Bank of America. Your line is now open.

Vivek Arya -- Analyst

Thanks for taking my question. Matt, I was hoping you could help quantify the AI revenues for fiscal '25 overall and then how we should start thinking about fiscal '26 given the upside in fiscal '25. And when you look at that fiscal '26 funnel, you know, what is that determined by? Is it demand visibility? Is it supply? So, just more kind of quantification and color on these metrics would be very helpful. Thank you.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yeah, hey Vivek, thanks for the question. So, just to calibrate everybody, we had our AI day back -- you know, several months back in April. We talked about 1.5 billion this year for AI and 2.5 billion for next year. You know, last quarter we updated that and said we were tracking ahead.

And as you can see from our third quarter results and fourth quarter guide, for this year, we're tracking significantly ahead now, both for this year and for next year. You know, and this is for this year on the order of hundreds of millions of dollars. So, the business has done fantastic. It actually had stronger-than-expected results, I think, every quarter this year.

And when we -- so again, very strong outlook for next year. And to your question about on the funnel and what's driving it, it's demand. I mean, on the supply side, we've done a great job of aligning with our partners. We're extremely well-positioned to capture the plan we have and upside to that.

And, you know, the team is all-in to drive and support what our customers need next year, which, at the moment, looks very, very strong, both on the custom AI side, but as well as our optical interconnect portfolio and switching as well on a year-over-year basis. So, firing on all cylinders, Vivek. Thanks.

Operator

The next question comes from Ross Seymore with Deutsche Bank. Your line is now open.

Ross Seymore -- Analyst

Hi, guys. Thanks for asking the question. I guess, first, congratulations to Loi on the retirement. And then, if I may, just a clarification and then the question.

I guess the clarification is, Matt, obviously you've been very successful at Marvell, but that seemingly is getting noticed in the press with some other management opportunities. So, I'll ask both questions at once, but could you comment at all on kind of your commitment to Marvell or looking elsewhere? And then, my second question is more on the customer diversification. How do we think that the business diversifies, whether it's by multiple products in the custom compute or by customers, as we go through calendar '25 and '26? Is it still the same timetable that you talked about at your AI day, or have things moved around?

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yeah. Thanks, Ross, and always appreciate your direct and frank nature of your questions. So, a couple thoughts. The first is, you know, I've been CEO at Marvell now for eight years.

And when I started here, this was a massive turnaround situation. Many of you remember this, the enterprise value at that time, I think it sunk to about $3 billion. And over the last eight years, me and my team have worked tirelessly all out to transform, drive growth, and position Marvell for what is now the biggest single TAM opportunity I've seen in my career, which is the AI super cycle and data center opportunity. I am all-in, OK, on Marvell.

We've got the best team at this company of people. The company's outstanding. The technology is best in class. I can't think of a better place to work than Marvell.

So, just let me be clear on this topic, Ross, for you and everyone that's listening. As the chairman and CEO of this company, I'm 100% focused on Marvell. OK, with that said, customer diversification. Yeah, we're actually in great shape here.

If you go back to the AI day and you look, we presented actually a range of design wins we had, both on AI accelerators and compute, as well as a variety of other custom opportunities. So, the breadth is very good across multiple customers, across all of them, actually, with custom solutions. And we have multiple large volume opportunities driving us right now, both -- and we called these out the AI day, both on the accelerator side, as well as the compute side. Both are tracking well with two different customers.

There's other programs going into production next year, and then we have our third large customer coming in the future. So, that's, again, another proof point or data point that gives us a lot of confidence in our ability to drive our long-term ambitions in custom silicon. So everything's tracking well. And the final thing I would say is on the technology front, I said in my prepared remarks, but very, very good progress on our two-nanometer platform, extremely complex and broad suite of IP that's best in class.

And that's also getting a lot of attention from our customers about not just the current sort of designs they're thinking of but even beyond. Thank you.

Ross Seymore -- Analyst

Thanks, Matt.

Operator

Your next question comes from Harlan Sur with JPMorgan. Your line is now open.

Harlan Sur -- Analyst

Good afternoon, and congratulations on the strong results and outlook. Matt, you know, great to see the strong ramp and execution on your five-nanometer AI training custom solution at your large cloud customer. You know, this customer has been articulating for several months now, right, the strong deployment strategy for these ASICs. That same customer today announced its next-generation custom solution at three nanometers, which would be ramping, according to them, end of next year, so calendar '25.

Imagine, like many others, you know, they're pulling in their AI program. So, given what appears to be strong execution of your five-nanometer program and the total ramp by Marvell team, the multi-year agreement with this customer that was announced a few days ago, your characterization of sort of multi-generational roadmap with them, is it fair to assume that you will be the ASIC vendor supporting your customer on this next-gen three-nanometer training ASIC targeted to ramp late next year? The only reason why I ask is because there just continues to be a lot of competitive noise out there around this three-nanometer program.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Thanks for the question, Harlan. So, first, we're very excited to see the role that custom silicon is playing. It's obviously in the news all the time. It's gained tremendous momentum, I'd say even since our AI day in terms of where we think that can go.

So, we see that as a validation of our strategy that we started many years ago, and it continues to be in full swing. For everybody on the call, at our AI day, we called it a total TAM of $75 billion for data center, 40 billion of that being in custom silicon. And we set and the team set a 20% market share target on that at 40 billion. So, that's 8 billion.

For context, we had said, for this year, as part of our AI numbers, about 500 million from custom going to a billion next year. And, of course, we're overshooting on those two right now. So, the way I would think about this is, take your 500 million plus this year, take your billion plus next year, draw a line to that bogey of 20% market share in the future. That's what we're driving.

And the announcement we made with AWS is very significant for both companies. For us as a supplier to them, as you pointed out, first of all, it's a five-year agreement. It covers AI custom products, as well as a broad range of networking products. It's significant in the revenue that it's going to drive for us.

And most importantly, it is multi-generational in nature. So, with this agreement and with these kinds of relationships that we're building with these customers, we have even more confidence than before to achieve our goals that we're driving. Thanks.

Harlan Sur -- Analyst

Yep, great insights. Thank you.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yep.

Operator

Your next question comes from Toshiya Hari with Goldman Sachs. Your line is now open.

Toshiya Hari -- Analyst

Hi. Thank you so much for taking the question. Matt, I had a two-part question on your electro-optics business within the context of AI. I'm curious how you would characterize customer inventory levels of optical DSPs in the marketplace today.

And I ask the question because I think some investors are a little worried about, you know, inventory build at your customer sites, particularly with tariff years coming up. And then, part B is if you can kind of speak to the 1.6T transition over the coming quarters and years and what that means for your content or your ASP expansion going forward. Thanks so much.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Thanks. Yeah, on the inventory side, look, the dynamic right now is we continue to have very strong demand, very strong bookings in order of visibility. And a large quantity of orders continue to come in inside lead time. We built through the pandemic and to today, a very robust supply chain capability.

And so we're able to drive and meet the upsides of our customers. Look, on the overall picture, we always are mindful as best we can about optical module inventory. And this was even a concern if you go back a year ago, as AI started to ramp, you know, what was going to happen, you know, were people getting ahead of their skis, etc. So, we continue to be diligent here and monitor.

But as it appears right now, demand is strong, bookings continue to be strong, visibility is great. We expect that business to grow significantly for us next year. On the 1.6T as it relates to that, that will be part of the growth we see next year. We're shipping that product now into production.

It'll be a contributor next year. But I don't want to take away from the very strong 800-gig cycle that will continue to be driven through our fiscal '26 next year. So, so far, so good.

Toshiya Hari -- Analyst

Thank you.

Operator

Your next question comes from Blayne Curtis with Jefferies. Your line is now open.

Blayne Curtis -- Analyst

Hey. Thanks for taking my question, and congrats on a great quarter. I actually want to ask on the enterprise and carrier. You've talked in the past, I think, about getting back to maybe 2 billion-plus run rate.

I mean, carrier's been up, I guess, with the guidance now. You're looking at double digits two quarters in a row. So, I was curious how broad-based that recovery is, and you can kind of -- how quickly do you think you can get back to that 2 billion-plus run rate annually?

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yeah, thanks, Blaine. Yeah, we're going to get back to the 2 billion run rate. The question is when. And certainly, we're very encouraged to see that combined enterprise and carrier up 4% in Q3.

But then, if you think about Q4, we've got it at up mid- teens, which a quarterback, we were sort of talking about double digits. So, net-net between sort of in the second half, both those end markets together have recovered and grown faster than we thought, albeit still shipping below end market consumption, which is your question. And so, that's going to continue through next year, that recovery. As both inventory is corrected, some end market growth resumes.

But also, we have some of our own unique drivers, which really is more pronounced in carrier than it is in enterprise. Enterprise will be more broad-based. In the carrier side, we're not really counting on a huge market recovery. It's really our own product cycles and specifically in base stations where we have a new socket that's ramping as a layer, two processor.

The incremental new socket, something we won a few years ago. It took a little bit longer than we thought to get into production, but it's in production now. So, that's going to be a contributor blame. And so, between the two, we're just gonna keep marching along and keep driving that business up.

And really, as it recovers, it's really just a tailwind for us in terms of operating income and profitability and top line. And so, we'll see how it goes. We'll keep updating everybody on a quarterly basis there. But so far so good, especially the plus mid teens on the Q4 guide.

Blayne Curtis -- Analyst

Thanks, Matt.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yep.

Operator

Your next question comes from Tom O'Malley with Barclays. Your line is now open.

Tom O'Malley -- Analyst

Hey, Matt. Thanks for taking the question. Congrats on the great results. I wanted to ask on some of the parts of the Amazon announcement.

So, AEC was mentioned, PCIe retimers, switching products. So, you're hearing just a lot from other smaller companies that are seeing some big robust revenue ramps. Could you just do your best to maybe size how significant those are for you today? And then, when you look out kind of over the next 12 months, what area of those nonoptical DSP businesses are gonna be the most significant for you? Just generally, where are you going to see the most growth outside of that core optical DSP business? Thanks, Matt.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yeah, thanks, Tom. Yeah, you know, as part of the agreement, both the custom side and the networking side are extremely important. It's not, you know, massively, you know, swayed between the two. So, on the networking side, all those product areas are in our wheelhouse, and they're all in various stages of maturity.

You know, look, on the switching front, you know, we had a great acquisition with Innovium. We announced our TL10 five-nanometer 51.2T switch. That's gone into production. Interest is very very strong in that product.

More to come there and also our roadmap, which we think is very compelling. And our team there has done an excellent job. So, that one, we think, has not only growth, you know, heading to next year, but on a long-term basis, we see that as being a very strong area for us. AECs is definitely a bright spot.

That's an area that we're ramping now through our module partners. And we, again, see very strong take-up of Marvell Solutions into next year. And then, some of the other more emerging categories are still to come, but those are areas we're investing in. So, I think the way to think about it is as a five-year type of arrangement, there's just a lot of opportunity to drive innovation together, to drive new solutions, sometimes things we haven't even thought of.

We're just very excited about what the two companies can do together. And then, with us as a customer of theirs, you know, we've just seen great success in using AWS as our supplier for EDA cloud services. And it's allowed us to complete some very complex designs in very, very short time to market with very good burst capacity and performance. So, the whole relationship is really a win-win and where it's really an honor for us to be associated with them.

And the final thing I would say is I think it's also a testament to the all-in data center-first strategy that Marvell has put together. And to see that get recognized with a type of landmark agreement like this, I think, is really a good sign for us and for the team and for our investors. Thanks.

Operator

Your next question comes from Mark Lipacis with Evercore. Your line is now open.

Mark Lipacis -- Analyst

Hi. Thanks for taking my question. I also had a clarification and a question, if I may. I think, Matt, did you suggest 40 billion of custom AI TAM out of 75 billion? So, does that suggest you believe custom is about half of the market, roughly speaking? And then, the question is, how would you characterize the competitive landscape for what you're doing on the custom side? How many companies can do what you guys do on the custom side? And maybe as part of that, can you help us understand why this is happening, why the custom silicon is becoming a thing? It seems just like five years ago, everything was run on a standard.

Every workload was run on a standard x86 server chip. And now, you know, you're helping your customers do custom silicon. You know, Nvidia has, you know, a whole bunch of different skews for Blackwell. Why is custom becoming a thing? Thank you.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yeah. Thanks, Mark. So, to refer back to the AI day, so what we called out was a $40 billion custom TAM, OK? And then, of that, you know, our goal is to drive, you know, 20% market share kind of plus. OK, so that's the numbers.

And then, within that, you know, we really see ourselves and one other very large, highly scaled-up competitor who can do these types of solutions. Now, there's going to be a lot of different ways that people are going to try to get there in terms of some of these custom approaches. There's already been a lot of noise in the system around these types of opportunities and applications. But our strong view is that in the end, what's actually going to ship and represent the vast majority in bulk of the volume of shipments in custom silicon for accelerators is going to be from scaled-up companies like Marvell, the companies that have the IP -- the combination of the IP roadmap internally, including SerDes and HBM PHYs and, you know, the compute interconnect and packaging, and I can go on and on.

But the capabilities is first. The second is a team, a team that's experienced enough to execute the design with A0 quality. And what A0 means is first-pass silicon, which is incredibly hard to do when you're talking about 100 billion type of transistor designs in the most advanced nodes. The third part of that is you got to have the manufacturing capacity and capability and know-how to drive yield, to drive quality, and then be able to service the products once they get into the field to meet the dynamic needs that these customers have in terms of the supply chain.

So, when you stack all that up, the barrier to entry to actually ship one of these products is very high, and we know firsthand because we've done several of them now. So, that's still the view we have on the competitive landscape despite, you know, what's out there. And then, on the why, you know, it really comes down to TCO. And it's not a zero-sum game.

It doesn't mean that if somebody implements a custom silicon design, it's going to just completely usurp and take over whatever the merchant offering is. These are going to coexist. Where there's workloads that are big enough that are going to get the bang for the buck on the optimization, it makes a ton of sense to go to custom from a TCO basis. And TCO is obviously the cost of the product and what it takes to implement it, as well as the performance you get.

And the other factor is when you're doing a custom silicon chip, it's not just the chip. It's also our customer's network and the way they implement the solution and the way that they know better than anyone else how to get the maximum performance out of their system with the accelerator being one piece of it. We try to be helpful to come in and not only be the partner of choice for the custom chips, but also come in with our point of view and our help around the interconnect and higher layer switching, and ways to think about how to drive total cost of ownership at the lowest possible power. And so, those are the dynamics, Mark, we see today.

And we'll keep you updated. But it's only moving in this direction. And I think just based on the announcements this week, and you can see in our revenues, the custom train is definitely happening. Next question.

Mark Lipacis -- Analyst

Thank you.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yeah, thanks.

Operator

Your next question comes from Tore Svanberg with Stifel. Your line is now open.

Tore Svanberg -- Analyst

Yes. Thanks, Matt. Congratulations on the strong execution, and also congratulations to Loi on his retirement. So, you announced the Ara three-nanometer 1.6T DSP today.

I think it's only about 18 months ago since you announced the Nova five-nanometer. So, I was a little bit surprised about the timing there. Am I reading into too much in there? Or is there something going on in the marketplace where there's a big push now toward three-nanometer and lower power? And any more color you can add on the timing of Ara would be great.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yeah. I think what you're seeing is obviously the need for lower power consumption solutions for all the reasons you can see, if you look all the way back up to the data center level and the power consumption of the data center themselves. But the reality is, Tore, we need to move at hyperscale speed. I mean, the beat rate that, you know, we think we need to be at to be competitive and to lead the market means we have to be faster and faster on our time to market.

And this is absolutely -- and I've been doing this for 30 years, OK, in the semiconductor industry. And I can tell you when you enter an inflection in the growth market, the company with the best in leading technology that's available, you can sample it, it works, is going to win, it's that simple. And so, our team, which is the best in the world at what they do, is heads down focused on driving best possible solutions, the best TCO, the best power, and highest performance in the latest process node. And you're gonna see that continue across Marvell, but particularly in this area of DSPs and broadband analog and the chipsets that we sell.

We intend to maintain our market share leadership and extend that and be the supplier of choice. That's as simple as that. We're going faster.

Tore Svanberg -- Analyst

Perfect. Thank you.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yep.

Operator

Your next question comes from C.J. Muse with Cisco. Your line is now open.

C.J. Muse -- Analyst

Cisco? Cantor Fitzgerald. Thank you for taking the question. Matt, I had a question on overall custom silicon. I was hoping you could level set us.

Where are we in terms of the total business versus just AI, you know, custom silicon? And is there any way to kind of size the total and the percentage for calendar '25? And I know, to an earlier question, you didn't want to give a growth rate for the AI portion, but, perhaps, you could speak to what kind of growth you foresee in calendar '25 and '26 for the non-AI part of the business.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yeah, thanks, C.J. And, yeah, I'm pretty sure you didn't go to Cisco since I think you just got a new job, which you're doing great at. So, congratulations on that. On the -- sorry, on your question about -- sorry, I lost the question, I was trying to make a joke there.

On the -- tell me your question again one more time.

C.J. Muse -- Analyst

Total custom silicon versus AI.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yeah, yeah. Got it. Sorry. The -- look, for this year, we said this at the AI day two, custom silicon this year and next year, it's largely driven by AI.

It's the vast majority. But the other programs have come in, OK? So, they're just -- and you know, what really happened is, we have a number of programs. They've done well. But the magnitude of the AI and kind of the upside we've seen relative to the others has just been higher.

So, vast majority is AI for this year, vast majority is AI for next year. But I wouldn't -- and we said at the AI day, I wouldn't sort of write off the other design wins we have because some of those -- like we showed off a custom NIC with Meta as an example. That was, I think, a really good showcase we did at OCP. Those types of solutions are also going to come into the market and help drive our growth.

And then on the non-AI, AI, you know, kind of custom, noncustom for this year and next year, we're not -- I'm not really breaking that out. I just say that, by default, the growth rate is going to be higher on the custom side because it's a lower base, and it's been ramping kind of in the second half, whereas electro-optics and switching in those other areas has already been in the revenue line. But both are going to grow, you know, quite a bit next year and drive the top line.

C.J. Muse -- Analyst

Thank you.

Operator

Your next question comes from Chris Caso with Wolfe Research. Your line is now open.

Chris Caso -- Analyst

Yes, thank you. Good evening. The question is on margins, and if you could help to level set us on the expectation for gross margins as we go into next year as that custom business ramps. And then, I guess just as importantly, on operating leverage as you go to next year, and I guess what you said in the past, is that the custom business is very good in the operating margins side.

You know, how does that flow through the numbers as we go into next year?

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yeah, great. I'll let Willem take that one. Willem, go ahead.

Willem Meintjes -- Chief Financial Officer

Yeah. Thanks, Matt. Hey, Chris. So, let me just start by saying, you know, the team's done a great job driving gross margin at or above 60% here in the second half, even as we've been ramping the custom programs very significantly, tight? And so, when we look out at next year, clearly, the gross margin will continue to be dependent on mix.

But we continue to see very strong optics growth next year, the recovery in our non data center businesses, the leverage that we're getting from better overhead absorption on higher revenue on the manufacturing side. And so, when you add all that together, we do see a path to continue to be about 60% through next year. Now, obviously, the custom upside even, you know, significantly more from what we're seeing today, you know, that answer would be different. In terms of the leverage, when you look at our Q3 results, you know, we came in at around 30% OM.

And even with gross margin down about half a percent, operating margin is actually up to 33%, so up by 3%. And so, when you look at our opex control, you should expect us to continue to have a very significant focus on levers through next year, with the top line outgrowing our opex right through next year. And so, really should see a very nice increase in our operating margin through next year, really starting to approach the bottom end of our long-term range toward the end of next year.

Chris Caso -- Analyst

Very helpful. Thank you.

Willem Meintjes -- Chief Financial Officer

Thank you.

Operator

Your next question comes from Atif Malik with Citi. Your line is now open.

Atif Malik -- Analyst

Hi. Thank you for taking my question. Congratulations on hitting the next growth phase. Matt, I was listening to the other Matt, Matt Garman, AWS CEO, at re:Invent today.

And he mentioned that the training and chip can do both training and inference. So, my question to you is, has your thinking about the sales contribution mix from the two programs at the customer ramp changed from 90 days ago?

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

No. No. We've been -- I think we've been able to plan our business together very well with our key customers in this area, especially custom where you have to do that. And so, I would really defer to Matt and the team to talk about their dynamics, but we're prepared to completely support whatever they need.

And we've got that in our manufacturing and supply plan, and we're going to go do it. That's probably all I can say. I usually stay away from any more detail about my customer's plan, so to speak. But thanks for the question.

Appreciate it.

Atif Malik -- Analyst

Thanks.

Operator

Your next question comes from Srini Pajjuri with Raymond James. Your line is now open.

Srini Pajjuri -- Analyst

Thank you. Hi, Matt. My question is also on the ASIC side. At the analyst day, you talked about a third -- I think you called it customer C, ramping sometime in 2026.

And I think you alluded to that opportunity being larger -- potentially larger than customer A and customer B combined. And obviously, customer B seems to be doing quite well. So, I'm just curious if there's any update on customer C, how the progress has been, and if you still expect that opportunity to be larger than the other two customers. Thank you.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Yeah. The short answer is yes. It continues to be the largest opportunity of the three. It's tracking well.

There's great support from both teams, and we're executing and unchanged from AI day. Other than, I'd say, just the whole, in general, custom silicon opportunity set just seems to have continued to gain momentum as each quarter goes on. And so, we're very optimistic about what we can go achieve with that customer and also our other two customers we have and then their next-generation concepts. A lot to go do and to go execute on, Srini.

Thanks.

Srini Pajjuri -- Analyst

Thanks, Matt.

Operator

There are no further questions at this time. I will now turn the call over to Matt Murphy, CEO, for closing remarks.

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Great. Thank you so much. And look, everybody, I really appreciate all the thoughtful questions. Closing remarks.

So, you know, as we finish the year here, we're very optimistic about our fiscal '26. As we talked about, we have a full year ramp of custom happening. You've got optics continually to have a lot of momentum. We're switching business growing.

And then, new areas like AECs are kind of just going into real volume production for the first time. We're also seeing a very strong recovery, even in our fourth quarter in our multi-market, you know, kind of core-based business. That's very encouraging in terms of profitability and top-line and EPS contributions. We have a very targeted investment plan, and we're 100% focused on this AI super cycle opportunity, and then, really, the capital allocation framework to support it.

I'm excited to have the investor day mid next year to update all of you comprehensively with our updated long-term model, given the sort of new era that we're entering into. As I said in the Q&A, me and the team are all-in to drive outstanding service and support for our customers and also extremely strong financial returns for our stockholders. So, I want to wish everybody on the call and who's listening a very happy holidays, and I look forward to seeing you all in the new year. Thanks, everybody.

Take care.

Operator

Thank you for attending today's presentation. [Operator signoff]

Duration: 0 minutes

Call participants:

Ashish Saran -- Senior Vice President, Investor Relations

Matthew J. Murphy -- Chair, President, and Chief Executive Officer

Willem Meintjes -- Chief Financial Officer

Vivek Arya -- Analyst

Matt Murphy -- Chair, President, and Chief Executive Officer

Ross Seymore -- Analyst

Harlan Sur -- Analyst

Toshiya Hari -- Analyst

Blayne Curtis -- Analyst

Tom O'Malley -- Analyst

Mark Lipacis -- Analyst

Tore Svanberg -- Analyst

C.J. Muse -- Analyst

Chris Caso -- Analyst

Atif Malik -- Analyst

Srini Pajjuri -- Analyst

More MRVL analysis

All earnings call transcripts

This article is a transcript of this conference call produced for The Motley Fool. While we strive for our Foolish Best, there may be errors, omissions, or inaccuracies in this transcript. As with all our articles, The Motley Fool does not assume any responsibility for your use of this content, and we strongly encourage you to do your own research, including listening to the call yourself and reading the company's SEC filings. Please see our Terms and Conditions for additional details, including our Obligatory Capitalized Disclaimers of Liability.

The Motley Fool recommends Marvell Technology. The Motley Fool has a disclosure policy.

Marvell Technology (MRVL) Q3 2025 Earnings Call Transcript was originally published by The Motley Fool