← All thesesSIMONeutralMedium convictionThursday 29 October 2026עברית

Silicon Motion Technology

Silicon Motion designs the controller chips that make flash memory work in phones, PCs and servers, and now also sells finished drives with the flash inside.

Our viewNeutral Medium conviction
The scores
The profile · 1-4
Growth3/4 ↑

Revenue rose 127% in Q2 2026, but about half is flash resold in drives, and 2023 fell 32%, so the record is short.

Business quality3/4 →

A firmware library across every flash maker won share, but its gains came as flash makers stepped back and they design their own.

Financial position3/4 ↓

Cash roughly equals debt after $1.15B of 0% notes, but first-half cash flow was minus $95.0M on inventory, with a 2029 put.

Execution record3/4 ↑

Seven beats in eight quarters and a guide raised twice, but the PCIe 5 ramp slipped and the client share target is unproven.

Per share capture3/4 →

Share count is flat, with small buybacks and a dividend; the notes convert only above $380.50, with no capped call.

Potential2/4 →

Analysts' 2028 revenue rests on purchase orders and the shortage lasting; MonTitan and boot drives are design wins, not contracts.

Risk profile3/4 ↓

PHISEMI took 38% of first-half sales and China 64% of billings; both are disclosed and the rest is spread.

Valuation2/4 ↓

About 18 times a year of the guided quarter's profit, earned at shortage prices; a 6% yield needs analysts' 2028 profit.

Evidence quality3/4 →

Statements and mix are filed and the cycle is TrendForce's, but the split of growth and the margin source are inferences.

The bet · 2-3 years
Priced for success1.2×

If it works 1.2× · if it fails you keep up to 16%.

The Verdict

We rate Silicon Motion neutral. It designs the chips that run flash memory, and its sales more than doubled this year, so the business is solid. But about half of that growth is finished drives resold at the high flash prices of a shortage, and the other half is share that flash makers handed over while busy elsewhere. The price is full: it already assumes the profit analysts expect in 2028, though supply should catch up a year earlier. As a bet it is fragile: the best case we can defend is only a little above today's value, and a turn like 2023's would keep a small fraction.

The long caseFlash makers busy with AI memory are handing controller work to outside specialists; Silicon Motion is the largest, and must keep that work after the shortage.

The evidence under this - 7 claims
C01facthigh confidence
Silicon Motion is a fabless designer of NAND flash controllers, based in Taiwan and incorporated in the Cayman Islands; it reports one segment and files a 20-F under US GAAP, with each ADS worth four ordinary shares. TSMC makes most of its chips.
current state · 2025-12-31written 2026-10-07
C10inferencemedium confidence
About half of the $252M rise in Q2 2026 revenue on the year came from solutions: roughly $135M against $8M a year earlier. Controllers rose from about $191M to $316M, about 65%.
derivedQ2 2026 revenue of $451.0M and Q2 2025 revenue of $198.7M (C06) split by management's shares of near 30% and 4% (C09).
against this
  • Management's shares are rounded, so each half could be $10M to $15M either way.
  • Some solution revenue, such as boot drives for NVIDIA's DPU programmes, is a new product rather than resold flash (C26).
current state · 2026-10-07written 2026-10-07
C12inferencemedium confidence
Gross margin rose to 50.2% while low-margin solutions grew from 4% to near 30% of revenue. If controllers held their 47.7% of a year earlier, solutions earned about 56%: flash bought before prices rose being resold at shortage prices, a margin that reverses when they fall. In Q3 gross margin rose again to 53.7% non-GAAP (53.6% GAAP) as Ferri and boot-drive solutions sales rose 75% to 80% on the quarter.
derivedQ2 2026 and Q2 2025 gross margins (C06; the vendor's Q2 2025 row reads 47.7%), the mix (C09), the 20-F's own statement that solutions earn less (C11), raw-material inventory up from $172.3M to $430.7M in six months (C13), and NAND contract prices rising every quarter of 2026 (C25, C30). Q3 2026 gross margin of 53.6% (C54).
against this
  • Controller margins may have risen too, from price increases and the enterprise mix, which would lower the implied solutions margin.
  • Management says the long-term gross margin target of 48% to 50% still holds (C08).
  1. 2026-10-29editedthe Q3 release shows gross margin at 53.6% GAAP with solutions still the fastest-growing line, so the shortage-priced margin has not faded
current state · 2026-10-07written 2026-10-07
C24management claimmedium confidence
Management says the Q2 2026 outperformance came mainly from share gains as NAND makers de-emphasise eMMC and UFS products, relying on third-party controllers while focusing their own resources on DRAM and HBM.
against this

The same shift sends sales to module makers whose inventories TrendForce says are high (C29), so share gained through them can be destocked.

current state · 2026-06-30written 2026-10-07
C40estimatemedium confidence
For a 6% after-tax yield, today's value needs about $745M of yearly operating profit at the guided 22% tax rate: analysts' 2028 revenue of $2.99B at a 25% margin, about 1.4 times the Q3 guide's run-rate.
derivedValue of about $9.7B (C39), a 22% tax rate (S02 guide), the 2028 consensus (C35) and the Q3 guide's run-rate (C39).
against this

Management says operating margin can exceed 30% exiting 2026 (C08); at 30% the same profit needs revenue near $2.5B, close to analysts' 2027.

current state · 2026-10-06written 2026-10-07
C29estimatemedium confidence
TrendForce estimated on 21 July 2026 a 4% to 5% NAND supply deficit in 2026, expected the supply-demand balance to turn positive in the second half of 2027, and said module makers had accumulated higher inventories because consumer demand was weak.
against this
  • Management expects scarcity until 2028 (C28).
  • TrendForce's 30 September release still expects contract prices to rise 15% to 20% in the fourth quarter (C30).
forwardwritten 2026-10-07
C03facthigh confidence
Revenue was $922.1M in 2021, $945.9M in 2022, $639.1M in 2023 (down 32.4%), $803.6M in 2024 and $885.6M in 2025. GAAP operating margin went from 26.7% in 2021 to 6.2% in 2023 and was 10.5% ($93.0M) in 2025.
historical · 2021 to 2025written 2026-10-07
01

The company

Raw flash memory is unreliable: cells wear out and return errors. A controller is the chip that hides this, spreading writes evenly, correcting errors and keeping track of where data lives. Silicon Motion, founded in Taiwan, designs them and has shipped more than 6 billion.

It sells to module makers that build phone storage and PC drives, and to flash makers such as Kioxia and Micron. Their alternative is to design their own, which the biggest flash makers already do for many products.

The evidence under this - 7 claims
C01facthigh confidence
Silicon Motion is a fabless designer of NAND flash controllers, based in Taiwan and incorporated in the Cayman Islands; it reports one segment and files a 20-F under US GAAP, with each ADS worth four ordinary shares. TSMC makes most of its chips.
current state · 2025-12-31written 2026-10-07
C02facthigh confidence
It sells three lines: SSD controllers (client PC drives and the MonTitan enterprise range), eMMC and UFS controllers for phones and other devices, and SSD solutions, which are finished drives with the flash inside: Ferri for cars and industry, and boot drives for servers. Buyers are NAND makers, module makers and device makers.
current state · 2026-06-30written 2026-10-07
C20facthigh confidence
The 20-F names its competitors as Microchip and Phison, the flash makers' own captive controller designs, and small Chinese merchant controller suppliers, and warns that customers could develop products that replace its own.
current state · 2025-12-31written 2026-10-07
C21facthigh confidence
Sandisk's 10-K says its controllers are 'primarily designed in-house' and made by foundries or bought from third-party suppliers.
current state · 2026-07-03written 2026-10-07
C22facthigh confidence
Micron's 10-K says its data-centre SSDs use an internally designed, vertically integrated controller, and that it also depends on third-party makers of controllers.
current state · 2025-08-28written 2026-10-07
C43management claimmedium confidence
The 20-F says the company has shipped more than six billion NAND flash controllers in ten years and supports flash from Kioxia, Micron, Samsung, SK Hynix and Solidigm, Sandisk and YMTC.
against this

Phison makes the same claim of broad NAND support, so breadth is shared with at least one rival (C20).

current state · 2025-12-31written 2026-10-07
C42facthigh confidence
Research and development was $174.4M in 2023, $217.8M in 2024 and $262.7M in 2025, about 30% of 2025 revenue; 1,837 of 2,009 employees are engineers.
historical · 2023 to 2025written 2026-10-07

How it makes money

It is paid per chip or per drive shipped. In 2025 almost all sales were controllers: about half for PC and server drives, the rest for phone storage. By Q2 2026 near 30% came from finished drives, where most of the price is the flash inside. One customer, named only PHISEMI, bought 38% of everything in the first half of 2026, and China took 64% of billings.

The evidence under this - 5 claims
C02facthigh confidence
It sells three lines: SSD controllers (client PC drives and the MonTitan enterprise range), eMMC and UFS controllers for phones and other devices, and SSD solutions, which are finished drives with the flash inside: Ferri for cars and industry, and boot drives for servers. Buyers are NAND makers, module makers and device makers.
current state · 2026-06-30written 2026-10-07
C04facthigh confidence
In 2025 SSD controllers were 45% to 50% of revenue and fell 0% to 5%; eMMC and UFS controllers were 40% to 45% and rose 20% to 25%; SSD solutions were 0% to 5% and fell. In 2023 solutions had been 5% to 10%.
historical · 2023 to 2025written 2026-10-07
C09management claimmedium confidence
Management says Ferri and boot-drive solutions were near 30% of Q2 2026 revenue, up from 4% a year earlier, and the CFO says solutions are controller plus NAND, so their prices are much higher than a controller's.
against this

The closing release for the notes says 'less than 5%' a year earlier rather than 4%, so the figures are rounded and the split is approximate.

current state · 2026-06-30written 2026-10-07
C17facthigh confidence
PHISEMI, a customer the filings name only that way, took 38% of first-half 2026 revenue ($300.2M), up from 25% ($91.3M) a year earlier; AFASTOR took 10%. In 2025 PHISEMI was 24%, AFASTOR 12%, Kioxia 12% and Micron 10%, and the top ten customers took 82%.
current state · 2026-06-30written 2026-10-07
C18facthigh confidence
By billing location, China took $508M of $793.1M of first-half 2026 revenue, 64%. Billings to Israel were $62.2M against $0.2M a year earlier.
historical · H1 2026written 2026-10-07
Where the money comes from, stream by stream
StreamShare of sales (2025)How it earns it
SSD controllers45% to 50%Controller chips for PC and server SSDs, sold to flash makers and module makers; MonTitan is the enterprise range.
eMMC and UFS controllers40% to 45%Controller chips for the storage inside phones, tablets and other devices, sold mostly to module makers.
SSD solutions0% to 5%Finished drives with the flash inside: Ferri for cars and industry and boot drives for servers; near 30% of revenue by Q2 2026.

Who runs it

Wallace Kou founded Silicon Motion in 1995 and still runs it; he owns 1.4% of the company and the chairman 1.2%, so the managers own a stake but not control. Jason Tsai has been chief financial officer since 2024. The company discloses only total pay for its leaders, $2.71M in 2025, and their shares vest with time, not with results. It is still fighting MaxLinear in arbitration for a $160M fee after that merger collapsed in 2023.

The evidence under this - 3 claims
C46facthigh confidence
Wallace Kou, co-founder, president and CEO, owns 1.4% of the shares (1,944,856 ordinary) and chairman James Chow 1.2%; Jason Tsai has been CFO since October 2024, after acting from April. Directors and senior managers were paid $2.71M in all in 2025, with stock awards vesting on service.
current state · 2026-03-31written 2026-10-07
C45facthigh confidence
Silicon Motion is seeking MaxLinear's $160M termination fee plus damages in arbitration over the merger MaxLinear ended in July 2023; hearings were held in October 2025 and March 2026 and no award had been disclosed.
current state · 2026-04-30written 2026-10-07
C47facthigh confidence
Silicon Motion pays $2.00 per ADS a year in dividends, bought back about 426,000 ADSs for $24.3M in 2025, and is building a Taipei office of about $103M due by the end of 2029.
historical · 2025written 2026-10-07
02

Why it wins, and who could beat it

Why customers come back

Its edge is scale in firmware: one library tuned to every major flash maker's memory, built over billions of chips and $262.7M of research a year. A module maker mixing flash from several makers can ship a working drive without its own controller team.

That edge showed in 2026, when phone-storage controller sales roughly doubled while phone production fell. But it does not lock in the flash makers, who design their own and stepped back by choice.

The evidence under this - 7 claims
C53inferencemedium confidence
Silicon Motion's edge is a firmware and controller library qualified against every major NAND maker's flash, spread over billions of units; it is valuable to module makers that buy flash from several makers and less to a flash maker designing for its own flash.
derivedSix billion controllers and every major NAND maker supported (C43), R&D of $262.7M a year with 1,837 engineers (C42), module makers relying on it as NAND makers step back (C23), and Sandisk and Micron designing their own (C21, C22).
against this
  • Phison offers the same breadth (C20, C43).
  • The share gain arrived when flash makers chose to step back during a shortage, which they can reverse (C23, C24).
current state · 2026-10-07written 2026-10-07
C43management claimmedium confidence
The 20-F says the company has shipped more than six billion NAND flash controllers in ten years and supports flash from Kioxia, Micron, Samsung, SK Hynix and Solidigm, Sandisk and YMTC.
against this

Phison makes the same claim of broad NAND support, so breadth is shared with at least one rival (C20).

current state · 2025-12-31written 2026-10-07
C42facthigh confidence
Research and development was $174.4M in 2023, $217.8M in 2024 and $262.7M in 2025, about 30% of 2025 revenue; 1,837 of 2,009 employees are engineers.
historical · 2023 to 2025written 2026-10-07
C23management claimmedium confidence
Management says NAND makers are accelerating the outsourcing of controllers to third parties, that some find it more attractive to sell wafers than to develop complete eMMC and UFS products, and that module makers filling the gap rely heavily on Silicon Motion.
against this

Sandisk and Micron both still design controllers in-house (C21, C22), so outsourcing is a choice they can reverse.

current state · 2026-04-29written 2026-10-07
C06facthigh confidence
Q2 2026 revenue was $451.0M, up 32% on the quarter and 127% on the year. Gross margin was 50.2% and GAAP operating income $101.1M, a 22.4% margin, against 11.2% a year earlier. SSD controllers rose 50% to 55%, eMMC and UFS 95% to 100%, and Ferri and boot drives 1,690% to 1,695% on the year.
historical · Q2 2026written 2026-10-07
C31estimatemedium confidence
TrendForce forecast in July 2026 that smartphone production would fall 15% to 20% in 2026 and notebooks about 10%, while servers took more than 40% of NAND bit demand and phones and notebooks together nearly 40%.
against this

Silicon Motion's eMMC and UFS sales nearly doubled while phone units fell, so units do not bound its share gains in the short run (C06).

forwardwritten 2026-10-07
C21facthigh confidence
Sandisk's 10-K says its controllers are 'primarily designed in-house' and made by foundries or bought from third-party suppliers.
current state · 2026-07-03written 2026-10-07

The threat

Phison, a Taiwanese rival, sells the same controllers to the same buyers. The bigger threat is the customers: Sandisk designs most of its controllers in-house and Micron its data-centre ones. Marvell and Microchip sell storage controllers too, as small parts of much larger companies.

The evidence under this - 4 claims
C20facthigh confidence
The 20-F names its competitors as Microchip and Phison, the flash makers' own captive controller designs, and small Chinese merchant controller suppliers, and warns that customers could develop products that replace its own.
current state · 2025-12-31written 2026-10-07
C21facthigh confidence
Sandisk's 10-K says its controllers are 'primarily designed in-house' and made by foundries or bought from third-party suppliers.
current state · 2026-07-03written 2026-10-07
C22facthigh confidence
Micron's 10-K says its data-centre SSDs use an internally designed, vertically integrated controller, and that it also depends on third-party makers of controllers.
current state · 2025-08-28written 2026-10-07
C50facthigh confidence
Marvell's 10-K says it offers 'a broad portfolio of storage controllers' for hard drives and SSDs, and Microchip's calls itself a leader in storage and memory controllers for data centres; each is a small part of a much larger company.
current state · 2026-03-31written 2026-10-07

The rivals: MU, SNDK, MRVL, MCHP, and 1 more that is private, in-house or listed abroad.

Who else does this, rival by rival
TickerRivalWhere it competesHow far alongPriced against it
Phison Electronics, a Taiwanese controller and module designer the 20-F names first among rivalsPriced against it: Listed abroadControllers: SSD controllers (client and MonTitan enterprise) and eMMC and UFS controllersOn saleListed abroad
MU · SNDKThe flash makers' own controllers: Samsung, SK hynix and Solidigm, Kioxia, Micron and SandiskPriced against it: Different productControllers: SSD controllers (client and MonTitan enterprise) and eMMC and UFS controllersOn saleDifferent product
MRVLMarvell's storage controllers for SSDsPriced against it: Small part of itControllers: SSD controllers (client and MonTitan enterprise) and eMMC and UFS controllersOn saleSmall part of it
MCHPMicrochip's data-centre storage controllersPriced against it: Small part of itControllers: SSD controllers (client and MonTitan enterprise) and eMMC and UFS controllersOn saleSmall part of it
SNDK · MUThe flash makers' own finished drives and boot-drive suppliers to GPU and DPU makersPriced against it: Different productStorage solutions: Ferri drives for cars and industry, and enterprise boot drivesOn saleDifferent product
03

How big it could get

How big this could get

Nobody publishes how many controllers are sold or at what price, so the market cannot be counted directly. What is measured is the flash they sit beside: servers now take more than 40% of flash demand, phones and notebooks nearly 40%, and phone production falls 15% to 20% in 2026. TrendForce expects flash supply to stay short through 2026 and balance in late 2027.

The evidence under this - 2 claims
C31estimatemedium confidence
TrendForce forecast in July 2026 that smartphone production would fall 15% to 20% in 2026 and notebooks about 10%, while servers took more than 40% of NAND bit demand and phones and notebooks together nearly 40%.
against this

Silicon Motion's eMMC and UFS sales nearly doubled while phone units fell, so units do not bound its share gains in the short run (C06).

forwardwritten 2026-10-07
C29estimatemedium confidence
TrendForce estimated on 21 July 2026 a 4% to 5% NAND supply deficit in 2026, expected the supply-demand balance to turn positive in the second half of 2027, and said module makers had accumulated higher inventories because consumer demand was weak.
against this
  • Management expects scarcity until 2028 (C28).
  • TrendForce's 30 September release still expects contract prices to rise 15% to 20% in the fourth quarter (C30).
forwardwritten 2026-10-07

Who has signed

Nothing is under contract. Customers buy on purchase orders. Its enterprise controllers are in production with two large customers, with five more due, and its server boot drives are one of two or three suppliers for each chip maker's programme. Neither comes with a disclosed volume.

The evidence under this - 3 claims
C27management claimlow confidence
Management says two tier-one customers were in production with MonTitan enterprise controllers in Q2 2026 and five more follow in the second half, targeting 5% to 10% of revenue exiting 2026; a 4nm PCIe Gen6 controller taped out in August with more than a dozen tier-one customers waiting, an initial share target of 'a minimum 15% to 20%' and growth expected from 2028.
against this
  • PCIe 5 adoption in client drives came more slowly than management expected six months earlier (C49).
  • No customer, volume or contract is disclosed for MonTitan.
forwardwritten 2026-10-07
C26management claimmedium confidence
On boot drives, management said in February that 2026 revenue would be 'relatively around $50 million' and that GPU and CPU makers use two or three suppliers, so it is not the sole source; in July it called boot drives 'crown jewelry' as long as it can secure NAND.
against this

Ferri and boot drives together ran near $135M in Q2 alone (C10), so the February figure was far too low or most solution growth is Ferri; the company does not split them.

current state · 2026-07-30written 2026-10-07
C17facthigh confidence
PHISEMI, a customer the filings name only that way, took 38% of first-half 2026 revenue ($300.2M), up from 25% ($91.3M) a year earlier; AFASTOR took 10%. In 2025 PHISEMI was 24%, AFASTOR 12%, Kioxia 12% and Micron 10%, and the top ten customers took 82%.
current state · 2026-06-30written 2026-10-07
04

The results

The numbers

Is it growing?Steady

Sales grew 10% in the year to Dec 2025, slower than the 26% in the year before.

Dec 2021: $922MDec 2022: $946MDec 2023: $639MDec 2024: $804MDec 2025: $886M$922M$886M
Is it profitable?Healthy

Operating margin is 11%, down from 23% in the year to Dec 2022.

Dec 2021: 27%Dec 2022: 23%Dec 2023: 6.2%Dec 2024: 11%Dec 2025: 11%27%11%
Does growth pay off?Pays off

Running costs take 38¢ of each sales dollar, up from 23¢ in the year to Dec 2021.

Dec 2021: 23¢Dec 2022: 27¢Dec 2023: 36¢Dec 2024: 35¢Dec 2025: 38¢23¢38¢
Does it earn good returns?Decent

Each dollar put into the business earns 10% a year after tax, down from 33% in the year to Dec 2021.

Dec 2021: 33%Dec 2022: 25%Dec 2023: 4.7%Dec 2024: 10%Dec 2025: 10%33%10%
Is it making cash?Thin

It turned 0.7% of sales into free cash, $6.29M over the year.

Dec 2021: $150MDec 2022: $51.0MDec 2023: $98.8MDec 2024: $32.7MDec 2025: $6.29M$150M$6.29M
How steady is it?Swingy

Yearly sales growth has ranged from −32% to +71% over the last 5 years, with sales falling in 1 of them.

Dec 2021: +71%Dec 2022: +2.6%Dec 2023: −32%Dec 2024: +26%Dec 2025: +10%+71%+10%
Are shares being diluted?Stable

The share count fell 3.8% in 4.0 years, and pay in shares costs 3.0% of sales.

Dec 2021: 140MDec 2022: 134MDec 2023: 134MDec 2024: 135MDec 2025: 135M140M135M
All the numbers

Filed figures from the company's 10-K and 10-Q, read 2026-10-07. Fiscal years end in December.

Dec 2021Dec 2022Dec 2023Dec 2024Dec 2025
Size and growth
Sales$922M$946M$639M$804M$886M
Sales growth+71%+2.6%−32%+26%+10%
Profit
Gross margin50%49%42%46%48%
Operating margin27%23%6.2%11%11%
Net margin22%18%8.3%11%14%
What growth costs, per sales dollar
Research and development18%20%27%27%30%
Sales and marketing3.1%3.3%4.2%3.4%3.9%
General and admin2.4%3.3%4.4%3.9%4.2%
Pay in shares2.1%2.8%2.7%2.1%3.0%
Capital spending2.7%3.5%7.9%5.5%6.2%
Cash
Cash from operations$175M$83.9M$149M$77.1M$61.4M
Free cash flow$150M$51.0M$98.8M$32.7M$6.29M
Balance sheet
Cash and short-term investments$360M$232M$314M$276M$202M
Debt--$0--
Net cash--$314M--
Returns and shares
Return on capital33%25%4.7%10%10%
Shares (diluted)140M134M134M135M135M

What growth costs

Growth has made it more profitable: research and office costs rose far more slowly than sales, so operating profit per sales dollar doubled in a year. The same fixed costs cut the other way in 2023, when sales fell 32% and profit nearly vanished.

The evidence under this - 3 claims
C52inferencehigh confidence
Operating costs grew far more slowly than sales in 2026: GAAP operating margin doubled from 11.2% to 22.4% on the year while gross margin rose 2.5 points, so costs other than goods fell by about 8.7 points of revenue. In 2023 the same lever ran the other way.
derivedQ2 2025 and Q2 2026 margins (C06), the 2023 margin fall (C03) and R&D growth (C42).
current state · 2026-10-07written 2026-10-07
C42facthigh confidence
Research and development was $174.4M in 2023, $217.8M in 2024 and $262.7M in 2025, about 30% of 2025 revenue; 1,837 of 2,009 employees are engineers.
historical · 2023 to 2025written 2026-10-07
C03facthigh confidence
Revenue was $922.1M in 2021, $945.9M in 2022, $639.1M in 2023 (down 32.4%), $803.6M in 2024 and $885.6M in 2025. GAAP operating margin went from 26.7% in 2021 to 6.2% in 2023 and was 10.5% ($93.0M) in 2025.
historical · 2021 to 2025written 2026-10-07

The last report (29 Jul)

Quarter ended June 2026, filed figures.

127%
Sales growth
against the same quarter a year earlier
31.8%
Growth from the quarter before
against 22.9% the quarter before that
22¢
Operating profit
per dollar of sales

The September quarter was the third record in a row. Sales of $560.2M were up 131% on a year earlier and 24% in three months, and operating profit rose to $162.6M, 29.0 cents of each sales dollar.

But inventory rose to $870.9M from $673.0M and cash from operations was minus $256.1M. Management guided the next quarter to $588M to $616M.

What it did to the thesisSales and margin beat our lines, so the growth is real. But stock piled up and the profit did not turn into cash, so the open question, whether the margin outlasts the flash shortage, is not settled and the view stays neutral.

The quarter in detail

Sales growth from the previous quarter, filed figures.

Earnings per share $2.43 against $2.13 expected.

The evidence under this - 4 claims
C54facthigh confidence
Silicon Motion's Q3 2026 sales were $560.2M, up 24% on the quarter and 131% on the year, against a guide of $519M to $541M; gross margin was 53.6% GAAP (53.7% non-GAAP), GAAP operating income $162.6M (29.0% of sales), GAAP earnings $1.91 and non-GAAP earnings $4.35 per ADS. It guides Q4 sales to $588M to $616M with a GAAP gross margin of 53.8% to 54.8% and a GAAP operating margin of 29.9% to 31.4%, and raised its yearly dividend by 15% to $2.30 an ADS.
against this
  • Inventory rose to $870.9M and cash from operations was minus $256.1M, so the profit has not yet turned into cash.
  • GAAP earnings of $1.91 an ADS were less than half the non-GAAP $4.35, mostly because of a $78.0M loss on investments and disposals in the cash flow statement.
historical · the quarter ended 30 September 2026written 2026-10-29
C13facthigh confidence
Inventory was $870.9M at 30 September 2026 against $673.0M at 30 June 2026 and $338.0M a year earlier; receivables were $443.5M against $323.6M at 30 June.
  1. 2026-10-29editedthe Q3 release gives the 30 September balance sheet: inventory rose another $197.9M; the split between flash and finished drives is in the filing and call not yet read
current state · 2026-09-30written 2026-10-07
C14facthigh confidence
In the first half of 2026 cash from operations was minus $95.0M, against plus $33.0M a year earlier; cash fell from $201.8M to $74.4M and a $59.2M bank loan was drawn. Long-term investments were $127.4M. In Q3 cash from operations was minus $256.1M, minus $351.1M for nine months, and cash and equivalents ended September at $845.9M after $1,125.9M raised in notes.
  1. 2026-10-29editedthe Q3 release shows cash from operations of minus $256.1M, the second negative quarter running, with inventory and receivables absorbing it
historical · H1 2026written 2026-10-07
C08management claimmedium confidence
Management guides Q3 2026 revenue of $519M to $541M (up 15% to 20% on the quarter), a 50% to 51% gross margin and a 24.4% to 25.7% GAAP operating margin, and says operating margin can exceed 30% exiting 2026 and 2026 revenue will more than double.
against this
  • The 2026 surge rests on NAND bought at rising prices; TrendForce expects contract price rises to slow and supply to balance in the second half of 2027 (C29, C30).
  • Q4 2025 non-GAAP EPS of $1.26 missed the $1.29 estimate, the only miss in eight quarters (C35).
forwardwritten 2026-10-07
What management did with the money

In August it borrowed $1.15B at no interest through bonds that turn into shares only if the price passes about $380. The chief executive said the money secures the components for its growth, meaning flash. It also pays a dividend and buys back a few shares.

Insiders in 2026Q2: 0 purchases and 1 sales, from their Form 4 filings.

The evidence under this - 3 claims
C15facthigh confidence
On 13 August 2026 Silicon Motion sold $1.15B of 0.00% convertible notes due 15 August 2031 for net proceeds of $1,127M. They convert at about $380.50 per ADS, 65% above the $230.61 close of 10 August; holders may put them on 15 August 2029; the company may call them from 20 August 2029 if the ADS trades at 130% of the conversion price; conversions settle in cash, ADSs or both at its choice.
current state · 2026-08-13written 2026-10-07
C16management claimmedium confidence
The CEO said the notes would let the company 'secure the components needed to support multiple ramps'; the stated use is general corporate purposes and repaying the credit facility.
against this

The formal use of proceeds names no NAND purchase, so how much goes into flash is unstated.

current state · 2026-08-13written 2026-10-07
C47facthigh confidence
Silicon Motion pays $2.00 per ADS a year in dividends, bought back about 426,000 ADSs for $24.3M in 2025, and is building a Taipei office of about $103M due by the end of 2029.
historical · 2025written 2026-10-07
05

The price, and where we disagree

In short. Full. The price already pays for the profit analysts expect in 2028, earned at margins that rely on a flash shortage expected to end in late 2027.

Share price
$284.96
close,
Price for each $1 of yearly profit
8.2
its 6-year normal 14.5
Company value for each $1 of cash profit
32.5
its 6-year normal 11.4

The shares have nearly tripled in a year, and they swing hard on any sign the flash shortage is easing. They fell from a June high when TrendForce said price rises were slowing, then jumped after the July results.

The September-quarter results came on 29 October and the shares have fallen since we wrote this. The next test is the December-quarter results in early February: whether inventory stops rising and cash from operations turns positive. TrendForce still sees supply catching up in the second half of 2027.

The evidence under this - 5 claims
C34facthigh confidence
The ADS closed at $284.96 on 6 October 2026, up 188% in 252 sessions: revenue per share rose 68% and the price paid for each dollar of trailing revenue rose 71%. It fell from a $355 high to $210 on 29 July, rose 21% after the Q2 results and fell from $256 to $231 when the notes were announced.
current state · 2026-10-06written 2026-10-07
C30estimatemedium confidence
TrendForce expected NAND contract prices to rise 10% to 15% in the third quarter of 2026, 'noticeably slower' than before, and on 30 September 15% to 20% in the fourth, with enterprise SSDs the only category where price growth accelerates.
against this

The fourth-quarter estimate re-accelerated after the third quarter slowed, so the direction is not settled.

forwardwritten 2026-10-07
C29estimatemedium confidence
TrendForce estimated on 21 July 2026 a 4% to 5% NAND supply deficit in 2026, expected the supply-demand balance to turn positive in the second half of 2027, and said module makers had accumulated higher inventories because consumer demand was weak.
against this
  • Management expects scarcity until 2028 (C28).
  • TrendForce's 30 September release still expects contract prices to rise 15% to 20% in the fourth quarter (C30).
forwardwritten 2026-10-07
C08management claimmedium confidence
Management guides Q3 2026 revenue of $519M to $541M (up 15% to 20% on the quarter), a 50% to 51% gross margin and a 24.4% to 25.7% GAAP operating margin, and says operating margin can exceed 30% exiting 2026 and 2026 revenue will more than double.
against this
  • The 2026 surge rests on NAND bought at rising prices; TrendForce expects contract price rises to slow and supply to balance in the second half of 2027 (C29, C30).
  • Q4 2025 non-GAAP EPS of $1.26 missed the $1.29 estimate, the only miss in eight quarters (C35).
forwardwritten 2026-10-07
C54facthigh confidence
Silicon Motion's Q3 2026 sales were $560.2M, up 24% on the quarter and 131% on the year, against a guide of $519M to $541M; gross margin was 53.6% GAAP (53.7% non-GAAP), GAAP operating income $162.6M (29.0% of sales), GAAP earnings $1.91 and non-GAAP earnings $4.35 per ADS. It guides Q4 sales to $588M to $616M with a GAAP gross margin of 53.8% to 54.8% and a GAAP operating margin of 29.9% to 31.4%, and raised its yearly dividend by 15% to $2.30 an ADS.
against this
  • Inventory rose to $870.9M and cash from operations was minus $256.1M, so the profit has not yet turned into cash.
  • GAAP earnings of $1.91 an ADS were less than half the non-GAAP $4.35, mostly because of a $78.0M loss on investments and disposals in the cash flow statement.
historical · the quarter ended 30 September 2026written 2026-10-29
The betPriced for success
If it works
1.2×
from today's value, at the stated multiple
If it fails
keep up to 16%
of today's market value: at most, with what is left counted at book value
How we read the multiple

Counting debt and cash, buyers pay about 18 times a full year of the operating profit guided for next quarter.

To earn 6 cents a year after tax on each dollar paid, a common rule of thumb for what a share should earn, Silicon Motion must:

  1. Earn about $745M of operating profit a year, about 1.4 times next quarter's guided pace.
  2. At 25 cents of profit per sales dollar, that takes about $2.99B of sales.
  3. That is the sales analysts expect in 2028, against $1.87B expected for 2026.

Against its own history. Much dearer than its own normal, because buyers are paying peak-cycle profit as if it lasts, in a business whose sales fell by a third in 2023.

The evidence under this - 4 claims
C39estimatemedium confidence
At $284.96 the company is valued at about $9.7B, and its enterprise value is about the same, since the $1,127M from the notes roughly equals the notes and bank loan. That is about 45 times trailing GAAP operating income of $214.3M, 24 times the Q2 2026 run-rate of $404M and 18 times the Q3 guide's run-rate of about $531M.
derived33.9M ADSs (C38); notes of $1,150M and a bank loan of $59.2M against cash of $74.4M and net proceeds of $1,127M (C14, C15), with the $127.4M of investments left out; operating income of $29.2M and $31.7M in Q3 and Q4 2025 (C41), $52.3M in Q1 2026 (C05) and $101.1M in Q2 (C06); the guide's midpoints of $530M and 25.05% (C08).
against this

Some of the note proceeds will go into NAND inventory, so net cash is lower than the arithmetic says by however much is spent.

current state · 2026-10-06written 2026-10-07
C40estimatemedium confidence
For a 6% after-tax yield, today's value needs about $745M of yearly operating profit at the guided 22% tax rate: analysts' 2028 revenue of $2.99B at a 25% margin, about 1.4 times the Q3 guide's run-rate.
derivedValue of about $9.7B (C39), a 22% tax rate (S02 guide), the 2028 consensus (C35) and the Q3 guide's run-rate (C39).
against this

Management says operating margin can exceed 30% exiting 2026 (C08); at 30% the same profit needs revenue near $2.5B, close to analysts' 2027.

current state · 2026-10-06written 2026-10-07
C35facthigh confidence
Analysts' averages are revenue of $1.874B and EPS of $11.19 for 2026 (seven analysts), $2.430B and $15.35 for 2027, $2.993B and $19.84 for 2028 (five), and $3.18B and $18.92 for 2029 from one analyst. The vendor's snapshot counts 25 buy, 4 hold and 2 sell; its dated series counts 11 of 12 positive. Q4 2025 non-GAAP EPS missed by 2%; the other seven quarters beat.
current state · 2026-10-06written 2026-10-07
C12inferencemedium confidence
Gross margin rose to 50.2% while low-margin solutions grew from 4% to near 30% of revenue. If controllers held their 47.7% of a year earlier, solutions earned about 56%: flash bought before prices rose being resold at shortage prices, a margin that reverses when they fall. In Q3 gross margin rose again to 53.7% non-GAAP (53.6% GAAP) as Ferri and boot-drive solutions sales rose 75% to 80% on the quarter.
derivedQ2 2026 and Q2 2025 gross margins (C06; the vendor's Q2 2025 row reads 47.7%), the mix (C09), the 20-F's own statement that solutions earn less (C11), raw-material inventory up from $172.3M to $430.7M in six months (C13), and NAND contract prices rising every quarter of 2026 (C25, C30). Q3 2026 gross margin of 53.6% (C54).
against this
  • Controller margins may have risen too, from price increases and the enterprise mix, which would lower the implied solutions margin.
  • Management says the long-term gross margin target of 48% to 50% still holds (C08).
  1. 2026-10-29editedthe Q3 release shows gross margin at 53.6% GAAP with solutions still the fastest-growing line, so the shortage-priced margin has not faded
current state · 2026-10-07written 2026-10-07
Priced against its rivals

None of the listed rivals above sells the same thing to the same buyers as a large part of what it does. Marvell Technology and Microchip Technology Incorporated do too, but as a small part of much bigger companies, so their price says little about this one. A price comparison needs at least two, so the price is judged against its own history instead.

Private or foreign rivals that cannot be priced: Phison Electronics, flash makers' captive controller designs, small Chinese merchant controller suppliers.

The bet: what it pays if it works

Even if it works, the shares look expensive. The best case we can defend is the sales analysts expect in 2028 at the margin the company now guides to. Valued as a chip maker at the top of a cycle, that is only a little above today's value.

If it fails, flash supply catches up, buyers work through their stock as in 2023, and shareholders keep a business earning its 2025 profit plus its stakes in two customers: a small fraction of today's value.

Operating profit in two to three yearsDollars of yearly revenue neededAt the stated multiple
$531.00Mabout 2.1B at 100% kept0.8×
$748.00M (the big win)about 3.0B at 100% kept1.2×
$898.00Mabout 3.6B at 100% kept1.4×

To pay 2× (a Fair bet) it would need about $1.26B of operating profit (about 5.0B dollars of yearly revenue); to pay 5× (a Cheap bet), about $3.14B of operating profit (about 12.6B dollars of yearly revenue), at the same multiple.

The steps it has to take

  • Done Q2 2026 revenue of $451.0M at a 22.4% GAAP operating margin
  • Done $1.15B of 0% notes sold to secure NAND
  • Done Q3 2026 revenue of $519M or more at a 24.4% or higher GAAP operating margin
  • In progress MonTitan at 5% to 10% of revenue exiting 2026 due 2027-02
  • Not started Gross margin of 48% or more for two quarters after NAND prices fall due 2027-12
  • Not started First revenue from the PCIe Gen6 enterprise controller due 2028-06
  • Not started Yearly revenue near $3.0B at a 25% GAAP operating margin due 2029-02
The detail behind the label
Rating
Expensive
the big win's payoff against the 2× and 5× lines
Cheap bet at about
≈ $68.14
76% below the price (close, )
The evidence under this - 8 claims
C35facthigh confidence
Analysts' averages are revenue of $1.874B and EPS of $11.19 for 2026 (seven analysts), $2.430B and $15.35 for 2027, $2.993B and $19.84 for 2028 (five), and $3.18B and $18.92 for 2029 from one analyst. The vendor's snapshot counts 25 buy, 4 hold and 2 sell; its dated series counts 11 of 12 positive. Q4 2025 non-GAAP EPS missed by 2%; the other seven quarters beat.
current state · 2026-10-06written 2026-10-07
C08management claimmedium confidence
Management guides Q3 2026 revenue of $519M to $541M (up 15% to 20% on the quarter), a 50% to 51% gross margin and a 24.4% to 25.7% GAAP operating margin, and says operating margin can exceed 30% exiting 2026 and 2026 revenue will more than double.
against this
  • The 2026 surge rests on NAND bought at rising prices; TrendForce expects contract price rises to slow and supply to balance in the second half of 2027 (C29, C30).
  • Q4 2025 non-GAAP EPS of $1.26 missed the $1.29 estimate, the only miss in eight quarters (C35).
forwardwritten 2026-10-07
C28management claimlow confidence
Management expects NAND scarcity to last 'likely until 2028 when new fabs come online'.
against this

TrendForce expects the supply-demand balance to turn positive in the second half of 2027 (C29).

forwardwritten 2026-10-07
C24management claimmedium confidence
Management says the Q2 2026 outperformance came mainly from share gains as NAND makers de-emphasise eMMC and UFS products, relying on third-party controllers while focusing their own resources on DRAM and HBM.
against this

The same shift sends sales to module makers whose inventories TrendForce says are high (C29), so share gained through them can be destocked.

current state · 2026-06-30written 2026-10-07
C03facthigh confidence
Revenue was $922.1M in 2021, $945.9M in 2022, $639.1M in 2023 (down 32.4%), $803.6M in 2024 and $885.6M in 2025. GAAP operating margin went from 26.7% in 2021 to 6.2% in 2023 and was 10.5% ($93.0M) in 2025.
historical · 2021 to 2025written 2026-10-07
C44facthigh confidence
The 20-F describes the industry's downturns as diminished demand, overcapacity, high inventory and accelerated price erosion, and upturns as limited NAND supply; the last downturn took revenue down 32.4% in 2023 and operating margin to 6.2%.
historical · 2023written 2026-10-07
C29estimatemedium confidence
TrendForce estimated on 21 July 2026 a 4% to 5% NAND supply deficit in 2026, expected the supply-demand balance to turn positive in the second half of 2027, and said module makers had accumulated higher inventories because consumer demand was weak.
against this
  • Management expects scarcity until 2028 (C28).
  • TrendForce's 30 September release still expects contract prices to rise 15% to 20% in the fourth quarter (C30).
forwardwritten 2026-10-07
C48facthigh confidence
Its $127.4M of long-term investments are stakes in BIWIN ($50.8M) and Shenzhen Techwinsemi ($76.6M), both module makers it sells to; they produced unrealised gains of $38.9M and $57.5M in the first half of 2026.
current state · 2026-06-30written 2026-10-07

Where we disagree with the market

The market believes

Silicon Motion has won lasting share from flash makers, and sales will climb from $1.87B this year to $2.99B by 2028.

We believe

Half the growth is lasting share; half is flash resold at shortage prices, which fades when supply catches up, likely before 2028.

The company's own annual report says finished drives earn less than controllers, because most of their price is flash it cannot mark up. Yet margins rose as drives grew to near 30% of sales. That only adds up if the drives are earning shortage prices on flash bought earlier.

We would be wrong if margins stay at 48% or more after flash prices start falling.

What analysts say, and the evidence
Analysts positive
92%
of 12, 1 Oct
Four months earlier
91%
of 11, 1 Jun
The evidence under this - 5 claims
C35facthigh confidence
Analysts' averages are revenue of $1.874B and EPS of $11.19 for 2026 (seven analysts), $2.430B and $15.35 for 2027, $2.993B and $19.84 for 2028 (five), and $3.18B and $18.92 for 2029 from one analyst. The vendor's snapshot counts 25 buy, 4 hold and 2 sell; its dated series counts 11 of 12 positive. Q4 2025 non-GAAP EPS missed by 2%; the other seven quarters beat.
current state · 2026-10-06written 2026-10-07
C10inferencemedium confidence
About half of the $252M rise in Q2 2026 revenue on the year came from solutions: roughly $135M against $8M a year earlier. Controllers rose from about $191M to $316M, about 65%.
derivedQ2 2026 revenue of $451.0M and Q2 2025 revenue of $198.7M (C06) split by management's shares of near 30% and 4% (C09).
against this
  • Management's shares are rounded, so each half could be $10M to $15M either way.
  • Some solution revenue, such as boot drives for NVIDIA's DPU programmes, is a new product rather than resold flash (C26).
current state · 2026-10-07written 2026-10-07
C11facthigh confidence
The 20-F says SSD solutions earn a materially lower gross margin than controllers, because in Ferri products NAND flash is most of the cost and the company has limited ability to mark it up, and that solutions tie up more working capital for NAND inventory.
current state · 2025-12-31written 2026-10-07
C12inferencemedium confidence
Gross margin rose to 50.2% while low-margin solutions grew from 4% to near 30% of revenue. If controllers held their 47.7% of a year earlier, solutions earned about 56%: flash bought before prices rose being resold at shortage prices, a margin that reverses when they fall. In Q3 gross margin rose again to 53.7% non-GAAP (53.6% GAAP) as Ferri and boot-drive solutions sales rose 75% to 80% on the quarter.
derivedQ2 2026 and Q2 2025 gross margins (C06; the vendor's Q2 2025 row reads 47.7%), the mix (C09), the 20-F's own statement that solutions earn less (C11), raw-material inventory up from $172.3M to $430.7M in six months (C13), and NAND contract prices rising every quarter of 2026 (C25, C30). Q3 2026 gross margin of 53.6% (C54).
against this
  • Controller margins may have risen too, from price increases and the enterprise mix, which would lower the implied solutions margin.
  • Management says the long-term gross margin target of 48% to 50% still holds (C08).
  1. 2026-10-29editedthe Q3 release shows gross margin at 53.6% GAAP with solutions still the fastest-growing line, so the shortage-priced margin has not faded
current state · 2026-10-07written 2026-10-07
C29estimatemedium confidence
TrendForce estimated on 21 July 2026 a 4% to 5% NAND supply deficit in 2026, expected the supply-demand balance to turn positive in the second half of 2027, and said module makers had accumulated higher inventories because consumer demand was weak.
against this
  • Management expects scarcity until 2028 (C28).
  • TrendForce's 30 September release still expects contract prices to rise 15% to 20% in the fourth quarter (C30).
forwardwritten 2026-10-07
06

What could go wrong, and how we would know

The risks

  • The shortage ends. TrendForce expects flash supply to balance in late 2027; drive sales and their margins would fall with flash prices.
  • Inventory bought at the top. It holds $673.0M of inventory, mostly flash bought at rising prices, and borrowed $1.15B to buy more; falling prices would force write-downs.
  • One unnamed customer. PHISEMI took 38% of first-half 2026 sales, and the filings say nothing more about who it is.
  • Flash makers take work back. The biggest flash makers design their own controllers and could stop outsourcing once their factories have spare room.
  • China and Taiwan. China took 64% of billings and the company is based in Taiwan, so trade rules or tension there hit it directly.
  • A bond put in 2029. Bondholders can demand $1.15B back in August 2029, which could land in a downturn.
The evidence under this - 6 claims
C29estimatemedium confidence
TrendForce estimated on 21 July 2026 a 4% to 5% NAND supply deficit in 2026, expected the supply-demand balance to turn positive in the second half of 2027, and said module makers had accumulated higher inventories because consumer demand was weak.
against this
  • Management expects scarcity until 2028 (C28).
  • TrendForce's 30 September release still expects contract prices to rise 15% to 20% in the fourth quarter (C30).
forwardwritten 2026-10-07
C13facthigh confidence
Inventory was $870.9M at 30 September 2026 against $673.0M at 30 June 2026 and $338.0M a year earlier; receivables were $443.5M against $323.6M at 30 June.
  1. 2026-10-29editedthe Q3 release gives the 30 September balance sheet: inventory rose another $197.9M; the split between flash and finished drives is in the filing and call not yet read
current state · 2026-09-30written 2026-10-07
C17facthigh confidence
PHISEMI, a customer the filings name only that way, took 38% of first-half 2026 revenue ($300.2M), up from 25% ($91.3M) a year earlier; AFASTOR took 10%. In 2025 PHISEMI was 24%, AFASTOR 12%, Kioxia 12% and Micron 10%, and the top ten customers took 82%.
current state · 2026-06-30written 2026-10-07
C21facthigh confidence
Sandisk's 10-K says its controllers are 'primarily designed in-house' and made by foundries or bought from third-party suppliers.
current state · 2026-07-03written 2026-10-07
C18facthigh confidence
By billing location, China took $508M of $793.1M of first-half 2026 revenue, 64%. Billings to Israel were $62.2M against $0.2M a year earlier.
historical · H1 2026written 2026-10-07
C15facthigh confidence
On 13 August 2026 Silicon Motion sold $1.15B of 0.00% convertible notes due 15 August 2031 for net proceeds of $1,127M. They convert at about $380.50 per ADS, 65% above the $230.61 close of 10 August; holders may put them on 15 August 2029; the company may call them from 20 August 2029 if the ADS trades at 130% of the conversion price; conversions settle in cash, ADSs or both at its choice.
current state · 2026-08-13written 2026-10-07
What we still do not know
  • Who PHISEMI is, the customer behind 38% of sales.
  • How much of drive sales are server boot drives and how much car drives, and what each earns.
  • How much of the $1.15B goes into flash, and at what prices.
  • Which buyer is behind a jump in sales billed to Israel, most likely NVIDIA's server chips.
The evidence under this - 4 claims
C17facthigh confidence
PHISEMI, a customer the filings name only that way, took 38% of first-half 2026 revenue ($300.2M), up from 25% ($91.3M) a year earlier; AFASTOR took 10%. In 2025 PHISEMI was 24%, AFASTOR 12%, Kioxia 12% and Micron 10%, and the top ten customers took 82%.
current state · 2026-06-30written 2026-10-07
C09management claimmedium confidence
Management says Ferri and boot-drive solutions were near 30% of Q2 2026 revenue, up from 4% a year earlier, and the CFO says solutions are controller plus NAND, so their prices are much higher than a controller's.
against this

The closing release for the notes says 'less than 5%' a year earlier rather than 4%, so the figures are rounded and the split is approximate.

current state · 2026-06-30written 2026-10-07
C16management claimmedium confidence
The CEO said the notes would let the company 'secure the components needed to support multiple ramps'; the stated use is general corporate purposes and repaying the credit facility.
against this

The formal use of proceeds names no NAND purchase, so how much goes into flash is unstated.

current state · 2026-08-13written 2026-10-07
C19inferencelow confidence
The jump in billings to Israel most likely reflects boot drives for NVIDIA's DPU programme, which is designed in Israel; the filings do not name the buyer.
derivedIsrael billings from $0.2M to $62.2M (C18) in the half that boot drives ramped (C26), and management's 'pretty large share for BlueField supply' on the Q2 call (S03).
current state · 2026-10-07written 2026-10-07

What would change our view

  1. Neutral→AttractiveA price the shortage-free business can carry

    It needs:

    • ○The whole company, counting debt and cash, costs 11 times a full year of the profit guided for next quarter, down from about 18.about ≈$132.73 today, 53% below the last close
  2. Neutral→AttractiveThe margin outlasts the flash price

    It needs all of:

    • ○Gross margin stays at 48% or more in the first two quarters after flash prices start falling.checked at the next results, due by 2 Feb
    • ○Sales of phone-storage controllers keep growing on a year earlier in those same quarters.watched as it happens
  3. Neutral→UnattractiveThe turn arrives with inventory high

    It needs any of:

    • ○Sales fall from one quarter to the next while inventory stays above $673M.watched as it happens
    • ○Gross margin falls below 46%.checked at the next results, due by 2 Feb
We would also be wrong if
  • A flash maker says it is taking controller work back in-house.
  • Enterprise controllers and boot drives reach a fifth of sales with named buyers.

What is coming

  • 29 October 2026 Q3 2026 results: Revenue against the $519M to $541M guide, gross margin against 50% to 51%, solutions' share of revenue, inventory and cash from operations.
Every dated event ahead
  • 29 October 2026 Q3 2026 results: Revenue against the $519M to $541M guide, gross margin against 50% to 51%, solutions' share of revenue, inventory and cash from operations.
  • February 2027 Q4 2026 results and the 2025 20-F's successor: Whether operating margin passed 30% exiting 2026, MonTitan's share of revenue, and the full-year customer table.
  • April 2027 MaxLinear arbitration award: Whether the $160M termination fee and damages are awarded; no date has been given.
  • December 2027 TrendForce's expected NAND supply-demand balance: Whether NAND prices stop rising, which tests the solutions margin and the inventory.
  • 15 August 2029 Holders' put date on the convertible notes: Whether $1.15B is repaid in cash, the date that matters if the cycle has turned.
Since we wrote this
Written
7 Oct
Price the thesis read
$284.96
6 Oct
  • 29 OctEarningsSales beat and margin rose, but inventory and cash flow worsenedSales $560.2M and margin 53.6% beat our lines; inventory rose to $870.9M and cash from operations was negative again. Neutral holds until the call.
  • 7 OctThesis writtenNeutral, medium convictionHalf real controller share, half flash resold at shortage prices, at a price that needs analysts' 2028 profit.

Also checked 3 times with nothing new to act on.

Sources 23

Where this came from

Sources - 23

Every claim above cites one of these, or states the reasoning that derived it. The quote is frozen at the date it was read: a link can rot, and an agent fetch returns a reading of a page rather than the page. Backs counts the whole claim ledger, so it can name a claim this page does not surface.

  1. S01primarycompany filing2026-04-30
    business, products and mix, customers, competition, risk factors on cycles and solutions margins, employees, results, R&D, legal proceedings, directors, pay, ownership, dividends and buybacks
    backsC01C02C03C04C11C17C20C42C43C44C45C46C47C48
  2. S02primarycompany filing2026-07-30
    Q2 2026 product-line growth, income statement, GAAP to non-GAAP reconciliation and Q3 2026 guidance
    backsC02C06C07C08C34C35
  3. S03primarytranscript2026-07-30
    Q2 2026 earnings call transcript (FMP), held 2026-07-30
    data/cache/transcripts/SIMO-2026Q2.json
    management on solutions' share, NAND scarcity to 2028, share gains, MonTitan, Gen6, boot drives, PCIe 5 and the margin target
    In second quarter '26, Ferri and Boot Drive solutions more than doubled sequentially and represent near 30% of our total revenue, up from 4% a year ago
    backsC08C09C24C26C27C28C49
  4. S04primarycompany filing2026-08-10
    the June 2026 balance sheet, inventory note, first-half cash flows, customer table, billing locations and investments
    backsC13C14C17C18C48
  5. S05primarycompany filing2026-08-11
    conversion price, premium, holder put date, call terms, settlement choice and use of proceeds
    backsC15
  6. S06primarycompany filing2026-08-14
    the final size, net proceeds and the CEO's statement of purpose
    backsC09C15C16
  7. S07primarycompany filing2026-04-29
    Q1 2026 product-line growth and income statement
    backsC05
  8. S08primarytranscript2026-04-29
    Q1 2026 earnings call transcript (FMP), held 2026-04-29
    data/cache/transcripts/SIMO-2026Q1.json
    management on outsourcing by NAND makers, module makers and NAND secured from three makers
    The mobile market is undergoing a rapid shift as NAND manufacturers accelerate the outsourcing of controller to third party, especially Silicon Motion.
    backsC23C33
  9. S09primarytranscript2026-02-04
    Q4 2025 earnings call transcript (FMP), held 2026-02-04
    data/cache/transcripts/SIMO-2025Q4.json
    management on boot-drive revenue, multiple suppliers, NAND suppliers and client SSD share
    Currently, we have 2 NAND supplier. One is secure but the other is not.
    backsC26C33C49
  10. S10primarycompany filing2026-02-04
    Q3 and Q4 2025 operating income and the investment gains in 2025 earnings
    backsC35C41
  11. S11primarycompany filing2026-09-22
    ordinary shares outstanding at the meeting
    backsC38
  12. S12primarycompany filing2026-08-17
    a flash maker's own statement that it designs controllers in-house
    backsC21
  13. S13primarycompany filing2025-10-03
    a flash maker's in-house data-centre SSD controller and its reliance on third-party controllers
    backsC22
  14. S14primarycompany filing2026-03-11
    its storage controllers for hard drives and SSDs
    backsC50
  15. S15primarycompany filing2026-05-21
    its storage and memory controllers for data centres
    backsC50
  16. S16primaryindustry data2026-02-02
    NAND contract price forecast for 1Q26 and memory makers moving lines to DRAM
    Similarly, NAND Flash contract prices are now expected to rise from 33-38% to 55-60%.
    backsC25
  17. S17primaryindustry data2026-07-03
    the slower third-quarter price rise
    NAND Flash contract prices are projected to increase by 10-15% QoQ-a noticeably slower pace than in previous quarters.
    backsC30
  18. S18primaryindustry data2026-07-21
    the 2026 supply deficit, the 2H 2027 balance, module-maker inventories, smartphone and notebook production and the demand split
    the supply-demand balance is expected to turn positive in the second half of 2027, allowing supply constraints to gradually ease.
    backsC29C31
  19. S19primaryindustry data2026-09-30
    the fourth-quarter price forecast and enterprise SSD demand
    Overall NAND Flash contract prices are projected to increase 15-20% QoQ.
    backsC30
  20. S20primaryindustry data2026-03-23
    the shortage of low-density NAND dies
    Process upgrades at NAND Flash manufacturers are reducing the supply of low-capacity products, making it increasingly difficult for the supply chain to source low-density memory dies.
    backsC32
  21. S21secondaryvendor data2026-10-07
    Research pack frozen beside this thesis, 2026-10-07
    content/SIMO/research-pack.json
    the 6 October close, the 252-day return and its decomposition, daily closes, estimates, the rating split and its history, earnings history, insider rows and FINRA short interest
    backsC34C35C36C37C38
  22. S22primarycompany filing2026-10-07
    Silicon Motion XBRL company facts, 2020 to 2025, frozen as content/SIMO/financials.json
    content/SIMO/financials.json
    annual revenue, cost of sales, R&D, operating income and cash flows
    backsC03C34C42C51
  23. S23primarycompany filing2026-10-29
    Q3 sales, margins, earnings per ADS, the Q4 outlook, the balance sheet at 30 September (inventory, receivables, cash, notes) and the cash flow statement
    backsC13C14C54
Rendered from content/SIMO/thesis.json · thesis reviewed 2026-10-29. This page explains a company; it does not say what to pay, when to buy or how much.