Leading SSD controller supplier Silicon Motion (SIMO) is forecasting record revenue in 2026, yet the growth story still appears driven primarily by its more established markets across mobile, PC and automotive rather than by a major breakout in AI or data center.
In the near-term, SIMO is guiding sequential revenue growth throughout the year, primarily driven by the mobile revenue segment with management stating: “We expect continued strength across nearly all our product segments with a particular emphasis on mobile where we expect significant outperformance due to continued market share gains.”
That said, management has made it clear execution is dependent in part on securing NAND supply on a stable basis, with higher input costs passed through to customers.
SIMO has a handful of notable customer wins, aside from working with the leading NAND flash and SSD suppliers. The company is supplying controllers for Nvidia’s BlueField DPUs in the second half of the year, along with several NVLink and Ethernet switch solutions. Analysts also implied that the company has won a role in Google’s ASICs project although management did not directly confirm the customer name.
Today, SIMO appears to be more adjacent to the action around NAND prices surging rather than being in the center of it. While NAND suppliers that own the flash content are seeing the benefits of higher average sales price per gigabyte and higher bit shipments, instead, SIMO sells the controller silicon and firmware that manages the NAND which does not benefit directly from pricing upside.
Over time, that could change with key products such as enterprise boot drive storage, MonTitan enterprise SSD controllers and PCIe6 MonTitan controllers. Below, we discuss key products that could help SIMO pivot toward the lucrative and highly supply-constrained AI memory market.
Brief Product Overview
Silicon Motion supplies a range of high-performance NAND flash controllers, and is the leading global supplier of PCIe Gen4 and Gen5 SSD controllers used in PCs, client devices, and enterprise/data center applications, along with eMMC and UFS controllers for smartphones and IoT devices. The company’s controller chips and firmware help manage how data is stored and accessed across these devices.
SIMO is heavily exposed to the consumer/client markets, with eMMC/UFS controllers driving 40-45% of revenue in fiscal 2025, with likely a large portion of SSD controller revenue (45-50% of revenue) coming from the two end markets.
However, Silicon Motion is looking to make solid inroads into the data center heading into 2027, serving merchant GPUs with Nvidia’s new BlueField DPU on its Vera Rubin generation with boot-storage, which helps to start and manage the system. Although this is not nearly as critical (or as valuable) as SSD like what SanDisk offers, which is the main data storage, supplying the boot-storage marks a shift for SIMO as their products will now be in AI servers.
There are also some other AI-driven tailwinds within compute and enterprise SSDs, being served by its MonTitan platforms in the second half of 2026 for QLC and TLC NAND for AI storage applications. These SSD controllers will help to solve the data storage challenges that AI servers face by helping them feed data and access data efficiently.
The company supplies the leading flash manufacturers including Kioxia, Micron, SK Hynix/Solidigm, Samsung, SanDisk, and China’s YMTC. Outside of memory suppliers, Amazon is a key customer and Nvidia.
Moving into Data Center with MonTitan and Enterprise SSDs for AI Servers
For its AI-oriented product portfolio, SIMO offers a handful of high-performance enterprise SSD controllers in 8-channel and 16-channel configurations, as well as its MonTitan PCIe Gen5 SSD development platform. MonTitan targets data center and enterprise boot drive storage needs, featuring an SSD controller ASIC, reference design kits and enterprise firmware, allowing customers to optimize designs to meet their performance needs.
SIMO began qualification of high-performance TLC compute SSDs on MonTitan at multiple customers in Q4, with qualification expected to progress through the first half of calendar 2026 and commercial ramp occurring in 2H. Additionally, SIMO expects to begin qualifications with multiple customers this year for QLC storage SSDs.
MonTitan is expected to be a core growth driver for SIMO once the ramp begins in 2H, with management already guiding for the platform to reach 5-10% of revenue exiting 2026, or ~$60 to $120 million run rate based on current estimates for $1.27 billion annual and $335 million revenue in Q4.
SIMO is also planning to tape out its first 4nm PCI Gen6 version of MonTitan (as current controllers are 6nm) this year, targeting hyperscalers, NAND flash manufacturers, storage system providers and CSPs. The new 4nm solution is expected to drive growth in 2027 and 2028, with management noting they already have secured a design win expecting to ramp significantly in 2028.
Ramping for Vera Rubin’s BlueField DPU in 2H 2026
Silicon Motion is expecting to see tailwinds from merchant GPUs arise in the second half of 2026, from its involvement within Nvidia’s Vera Rubin on DPU boot drives, as well as its NVLink/Ethernet switch roadmap. Management discussed they were involved with other potential customers for enterprise boot drive solutions including a leading search engine firm, with analyst commentary implying that Google may have already been won as a customer, though this was not confirmed. However, SIMO faces two main headwinds at present that could push this growth story to the back burner – timing of the ramp and PC/mobile headwinds, and challenges procuring NAND.
SIMO explained in Q4’s call that they kicked off volume shipments to Nvidia in the quarter for its current DPU generation, adding that they are also working with the GPU leader “to qualify the next-generation version of their DPU as well as for several NVLink and Ethernet switches of their new GPU/CPU platform that are expected to launch in the second half of 2026.” Management added that the next-gen DPU and switch both require higher capacities, with much higher unit volumes and ASPs, unlocking a new growth opportunity in the back half of the year through 2027.
This likely corresponds to Nvidia’s upcoming BlueField4 and BlueField4 STX platform announced at GTC, as well as its Spectrum-6 switch family. The STX rack in particular underpins Nvidia’s in-house ‘Inference Context Memory Storage’ platform, an Ethernet-attached flash SSD tier optimized for KV cache at the pod level to accelerate large-context inference. For more on the ICMS platform, refer to our SanDisk analysis here: SanDisk: Shares Up 559% In 2025 On NAND Flash, Enterprise SSD Tailwinds.SanDisk: Shares Up 559% In 2025 On NAND Flash, Enterprise SSD Tailwinds.
SIMO provided a brief view on the products it is supplying for Nvidia and their role at GTC: MonTitan SSDs for the ICMS platform and KV cache extension, as well as for near-GPU high performance storage; enterprise SSD controllers for compute-optimized, nearline SSD and warm data storage with TLC and QLC SSD support; and PCIe NVMe boot drives and boot drive controllers.
Given the new nature of this growth opportunity, analysts questioned about the revenue opportunities from BlueField DPUs/boot drives, and how it will play out this year and into next. Management explained that they expect the DPU/boot drive volume to be “very meaningful in 2026” with revenue around $50 million, but next year to be “much higher” as the NVLink and Ethernet switches see “more volume in 2027.”
This would imply DPU revenue contribution remaining around <5% of revenue in 2026, based on current estimates for $1.27 billion in annual revenue, though commentary for much higher growth with product ramps weighted next year suggests management has already has solid visibility into the business potentially becoming a much more meaningful topline driver by the end of next year.
However, the discussions also shed light on some primary headwinds SIMO faces. First, the main challenge comes down to timing, with the ramp more weighted in the back half of 2026 and into 2027, whereas SIMO must currently navigate challenging PC and mobile markets. Second, growth depends on NAND procurement which must be bought at market prices, margins must be passed through to customers, and it is not the sole controller supplier for DPUs.
Headwind #1: Timing
SIMO did set the stage for a strong year, expecting record revenue and sequential growth in each quarter with Q1 being the lowest for the year, a strong statement considering growth headwinds facing the mobile and PC markets from rising memory costs, with volumes expected to decline YoY in both end markets.
This is why timing may be the most challenging aspect to SIMO’s thesis, as it is working to ramp its presence in the data center, yet these initial contributions may not be material enough to overcome PC and mobile challenges as the year progresses.
As noted above, SIMO is forecasting Q1 to be the lowest quarter of the year, primarily impacted by typical seasonal weakness in client SSDs with mobile expected to significantly outperform. Guidance was $292 million to $306 million, or $299 million at midpoint for roughly 7.4% QoQ growth, counter to typical seasonality but decelerating from 15.1% QoQ in Q4.
Current estimates point to SIMO’s sequential growth decelerating further to 2.7% in Q2 and remaining in the low/mid-single digit range through year-end, overall marking a high teens deceleration from Q3’s peak on current estimates.
A key factor behind the soft forward QoQ growth is likely the PC/mobile headwinds given the significance of eMMC/UFS controller and client SSDs in terms of dollar growth and revenue contribution.
Recent projections from Gartner and IDC point to a worsening environment for PCs. IDC had originally forecast an (8.9%) decline in shipments in 2026 in its pessimistic scenario from December 2025, yet it now projects an (11.3%) decrease in shipments this year as rising memory costs force price hikes that bite into demand. Gartner sees a similarly woeful year for PCs, forecasting a (10.4%) decline, with analysts there saying this would represent the “steepest contraction in device shipments witnessed in over a decade.”
For smartphones, both of the two groups forecast a similarly challenging year. IDC is forecasting a (12.9%) decline in the smartphone market in 2026, a rather substantial revision lower from its December projection for just a (5.2%) decline. For comparison, Gartner projects an (8.4%) decline. This follows low-single digit growth in 2025.
SIMO does expect to outperform both markets and deliver growth as it benefits from market share gains and improved ASPs, explaining that they will “get the benefit of both higher share and higher ASPs this year in spite of any sort of macro issues around PC unit volumes.”
However, it is still worth pointing out that there is no guarantee that it will be able to flawlessly navigate what could shape up to be some of the worst growth in PCs more than a decade and potential double-digit unit declines. If these supply chain difficulties persist and cause inventory buildups at OEMs, consumer/client NAND demand could be impacted, and SIMO’s limited data center opportunities (where NAND demand is likely to remain relatively well insulated from rising storage demand) may not be enough to offset growth and margin headwinds.
Headwind #2: NAND Procurement
While the PC and mobile headwinds are two challenging external headwinds, perhaps the most challenging internal headwind SIMO will face comes down to NAND supply. This is because the company has to procure NAND itself at market price, and then work to pass the costs on to customers, without benefitting from some of the end-unit pricing power that its customers are seeing:
“We need to procure the NAND and NAND price at the market price. So we have to work out with the customer, we can pass through the cost increase to the end customer. So it is challenging but ongoing process quarter-by-quarter. It definitely will impact some of our gross margin but we manage the margin pass-through. So I think because even the customers, they have at least 2 to 3 supplier, so they're based on the price and based on the supply and depends the percentage.”
The challenge here is that NAND prices reportedly rose ~90% QoQ in Q1, and were estimated to increase ~20% QoQ in Q2 in early February, yet the latest data suggests prices could rise 70-75% QoQ in Q2. Recent reports from Korea also suggest Samsung is doubling prices sequentially in the second quarter, implying that pricing is not yet slowing down. Simply put, when input costs rise 70% or 90%, prices must follow at a similar or faster rate in order to preserve margins.
Considering the boot drive solution is a new product line with minimal revenue contribution until 2H, outsized pricing headwinds this early in its ramp phase could weigh substantially on gross and operating margins, which are already quite thin in the mid-40% and 13% range. This compares to its customers like Micron who are pushing above 80% and 76% next quarter as major beneficiaries of the price increases.
Management also flagged that growth will be dependent on its ability to secure NAND supply ‘stably’, another major challenge considering SIMO has two NAND suppliers – stated as Kioxia and WDC (though likely to now be SanDisk). Management explained that one of these suppliers is secure, yet the other is not, which could impact their ability to secure stable supply at favorable prices, especially if the second prioritizes allocations to the highest bidder. To note, Kioxia announced in January that its NAND output for 2026 was essentially fully sold out.
Financials
Revenue Growth Accelerates to 45.7% in Q4 2025
Silicon Motion’s Q4 2025 revenue grew by 45.7% YoY and 15.1% QoQ to $278.5 million. Revenue also beat estimates by 6.7%, reflecting the continued strength in mobile business and strong growth in the PCIe 5 SSD business. Revenue growth accelerated by 31.8 percentage points from 13.9% YoY in Q3 2025. Though sequential growth slowed from 21.8% in Q3, it was better than the decline of (10%) in the same period last year.
Management also provided a strong Q1 revenue guide of $292 million to $306 million, implying a YoY growth of 79.6% and 7.4% QoQ at the midpoint. Management expects continued strength across its products with a particular emphasis on mobile end markets, where it expects significant outperformance driven by continued market share gains.
2025 revenue grew by 10.2% YoY to $885.6 million. Analysts expect revenue growth to accelerate to 43.1% YoY to $1.27 billion in 2026. Management expects 2026 to be a record year, with revenue growing each quarter sequentially, supported by first-half momentum in eMMC and UFS products. To briefly recap, MonTitan enterprise SSD products are expected to scale in the second half of 2026 and contribute 5% to 10% of revenue by the end of the year, with strong growth anticipated in the years ahead.
Key Segments
SSD Controllers
SSD Controller sales increased by 25% to 30% QoQ and 35% to 40% YoY in Q4 2025, compared to an increase of 20% to 25% QoQ and a decrease of 0% to 5% YoY in Q3. Management expects client SSD controllers to ramp throughout the year, though the first quarter is seasonally weaker. They expect the new DRAM-less 4-channel PCIe 5 controller that was introduced last quarter to ramp significantly throughout 2026 and the MonTitan controller ramp is expected in the second half of 2026.
For the full year 2025, SSD Controllers accounted for 45% to 50% of revenue and revenue declined by 0% to 5% YoY.
eMMC + UFS Controllers
The company’s eMMC (Embedded Multimedia Card) + Universal Flash Storage (UFS) controller sales increased by 0% to 5% QoQ and 50% to 55% YoY in Q4 2025, compared to an increase of 20% to 25% QoQ and 35% to 40% YoY in Q3 2025.
For 2025, eMMC + UFS Controllers accounted for 40% to 45% of revenue and revenue increased by 20% to 25% YoY. Given the current backlog and customer outlook for 2026, management expects to significantly outpace the market and deliver another strong year of growth of the eMMC and UFS business despite the difficult market environment, with the two accounting for 35% to 40% of revenue in 2026.
SSD Solutions
SSD Solutions revenue increased by 125% to 130% QoQ and 110% to 115% YoY in Q4 2025 compared to an increase of 15% to 20% QoQ and decrease of 40% to 45% YoY in Q3 2025. For 2025, SSD Solutions accounted for only 5 to 10% of revenue and declined by 10% to 15% YoY.
The company’s boot drives are part of its SSD solutions, and this segment is currently growing rapidly due to the strong AI demand.
Margins
The company’s margins are improving; however, management expects slight pressure in Q1 primarily due to product mix, with improvement anticipated as the year progresses. They expect gross margins to return to the target range of 48% to 50% as the year progresses, as the mix of newer products increases, including the PCIe 5 controllers and enterprise SSD solutions.
- Q4 gross profits grew by 56.2% YoY to $136.8 million with a gross profit margin of 49.1%. The adjusted gross margin improved by 320 basis points YoY and 50 basis points QoQ to 49.2%. The improvement in gross margin was primarily driven by the successful ramp of new products and a favorable product mix shift toward client PC products.
- The adjusted operating margin came at 19.3%, up 380 basis points YoY and 350 basis points QoQ. Management expects full year 2026 adjusted operating margin to improve despite the higher expenses this year, primarily driven by operating leverage.
- Q4 net income came at $47.7 million or 17.1% of revenue compared to $21.6 million or 11.3% of revenue in the same period last year. The company benefited from the realized/unrealized gain on investments of $24.2 million in Q4 2025 compared to $0.1 million in Q4 2024.
Q4 Adjusted EPS grew by 45%
The company’s Q4 adjusted EPS grew by 44.8% YoY to $1.26. Analysts expect strong growth to continue and expect Q1 adjusted EPS to grow by 117.2% YoY and 75.9% in Q2 2026. Looking forward, adjusted EPS is expected to grow by 59.4% YoY in 2026 and 21.9% in 2027.
Cash Flow and Balance Sheet
The company’s cash flows have been lumpy, and the increase in inventory to support strong future growth has put pressure on cash flows.
- Q4 operating cash flow was $1.6 million or 0.6% of revenue compared to an operating cash outflow of ($6.2 million) or (3.2%) of revenue in the same period last year.
- Q4 free cash outflow was ($6.3 million) or (2.2%) of revenue compared to ($17 million) or (8.9%) of revenue in the same period last year.
- The company had cash of $201.8 million and no debt at the end of Q4 2025 compared to $198.6 million in cash and no debt at the end of the previous quarter.
- Inventories increased by 24.8% QoQ to $421.8 million to support the strong future growth.
Conclusion
SIMO is guiding for record breaking revenue in fiscal 2026 despite growing headwinds in the PC and smartphone markets from rising memory costs. Q1 is expected to the lowest quarter of the year for revenue with client SSDs seeing typical seasonal weakness, with sequential growth in each quarter thereafter. The company’s AI opportunities around Nvidia’s BlueField DPUs are expected to arise in the second half of the year and contribute roughly $50 million with a larger impact in 2027, while MonTitan is expected to quickly ramp in 2H to 5-10% of revenue.
Revenue growth will also hinge on SIMO’s ability to stably procure NAND supply to meet its end market demand, making increasing memory costs a point to navigate for growth.
An analyst on the call threw out 2027-2028 as potential timing for when the enterprise segment could get interesting. Our analysis points toward something similar, which is that 2026 may be a solid growth year for mobile and also PC yet is unlikely to be the year SIMO breaks out as a major enterprise AI story.
Given the growth we are seeing in NAND, we felt it was worth our time to look at this stock more closely, yet will put SIMO on the shelf for further review until end of 2026 to see if a few of these green shoots materialize in the AI market.
Please note: The I/O Fund conducts research and draws conclusions for the Fund’s positions. We then share that information with our readers. This is not a guarantee of a stock’s performance. Please consult your personal financial advisor before buying any stock in the companies mentioned in this analysis.
Damien Robbins, Equity Analyst at I/O Fund contributed to this analysis.
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