Kioxia HoldingsThin moat

285A — overall economic moat

Investment snapshot
Thin moat→ Holding steadyConfidenceLowValuationCheap
Strongest advantageBiCS process and the shared-fab structure
Greatest threatOne product, with nothing underneath it
Key metricGross margin, quarter by quarter
Verdict: The purest NAND pure-play there is — a real manufacturing franchise, half of it jointly owned with a competitor, wrapped around a product whose price six producers set and none can hold. A 75% operating margin and a year when flash sold below cost are two years apart, and nothing structural has changed in between.
📈 285A valuation, revenue & earnings — P/E, P/S, revenue, EPS →

Kioxia makes NAND flash memory. Not mostly — only. There is no DRAM division, no logic business, no second product to lean on, and that single fact explains almost everything about how this company behaves.

Kioxia revenue, year to March 2026SSD & Storage — 58%Smart Devices — 32%Other — 9%¥2,337.6bn in total. By the June 2026 quarter drives alone were 66% of sales.
One product in three packages - and the drive band is the only one growing.

Flash is the memory that keeps its contents when the power goes off, so it is what a phone stores photographs on and what a data centre stores its data on. Kioxia sells it in two forms. Finished drives — SSDs — brought in ¥1,362,638 million in the year to March 2026; chips sold to phone makers brought in ¥759,978 million; retail cards, USB sticks and sales to its joint-venture partner made up the remaining ¥215,012 million of ¥2,337,628 million1. The mix is moving fast: by the June 2026 quarter, drives were 66% of sales and data-centre and enterprise drives were more than 60% of those2.

The company was Toshiba's memory division until 1 June 2018, when a consortium led by Bain Capital bought it3. It listed on the Tokyo Stock Exchange on 18 December 2024 at ¥1,455 a share. It traded near ¥54,570 on 18 September 2026, having touched ¥112,700 on 22 June 2026 and given back more than half of that since4.

The nine fabs are all in Japan, and seven of them are not entirely Kioxia's. They are run through Flash Ventures, three joint operations owned equally with Sandisk5, which means Kioxia's manufacturing partner is also its competitor and, in two of the last three years, one of its largest customers6.

What has happened recently is not subtle. Revenue in the June 2026 quarter was ¥1,767.1 billion, up 415.5% on a year earlier, at a 75% operating margin — and average selling prices rose about 70% against low single-digit growth in the number of bits shipped7. Almost none of this is Kioxia selling more. It is Kioxia selling the same amount for far more.

Which is worth remembering, because the mechanism runs in reverse. In the year to March 2024 the company's cost of sales exceeded its revenue: it sold ¥1,076,584 million of flash that cost ¥1,205,927 million to make, and lost ¥243,728 million8. That was two years ago, in the same buildings, with the same engineers. Its three applications are taken in turn in The Revenue Lines.

The number that tests this moat
Reported
Revenue, and where it comes from
¥2,337.6bn to March 2026 — SSDs 58%

SSD and storage ¥1,362,638M, smart devices ¥759,978M, and ¥215,012M of retail products and sales to Sandisk through the manufacturing joint ventures. By the June 2026 quarter drives were 66% of sales. Watch the SSD line: it is the only part of the company being sold to buyers who qualify a product rather than quote a price.

Source: Kioxia Holdings, Annual Securities Report for the year to 31 March 2026 ↗
Moat scorecardHow ratings work →
Switching costs3/10
Network effects2/10
Pricing power3/10
Hard to replicate6/10
Disruption resistance3/10
Overall durability4/10

A genuine process and manufacturing franchise in the weakest structure in memory — six producers, one product, and every fab in one country.

Dig deeper
DIG DEEPER 01
The Revenue Lines
One product sold three ways, and the way that sells drives to data centres went from half the company to two-thirds, mostly on price.
DIG DEEPER 02
The Moat
A genuine manufacturing franchise wrapped around a product with no pricing power: the process is defensible, the fabs are half-owned with a…
DIG DEEPER 03
Competitors
Six producers, no majority, and the two rivals closest to Kioxia are structurally beyond its reach -- one because it is a division of a conglomerate…
DIG DEEPER 04
Major Clients
Kioxia publishes its customers by name, and the table shows Apple at about a fifth of revenue for three years running -- alongside the joint-venture…
✦ Future bets — beyond today's moat
✦ FUTURE BET 01
The Future Bets
A fab the company will not confirm, two owners heading for the exit, 800 billion yen of buyback, and a tier of memory that has failed commercially…
⚠ Threats to the moat
⚠ THREAT 01
One Product, and Nothing Underneath It
Two consecutive losing years, and in the second of them the cost of sales exceeded the revenue -- which is what a pure play looks like when the price…
⚠ THREAT 02
Every Fab in One Country, Two of Them on a Fault Line
The filing says it plainly: Yokkaichi sits in an area of high earthquake and flood risk, and Kitakami in one severely damaged in 2011.
◆ What the market may be missing
◆ THE VARIANT VIEW
What the Market Isn't Pricing In
Twenty times earnings on the best year in the company's history, 53 percent below the June high, and about six times the run rate it has already…
◆ THE VARIANT VIEW
Inside the Latest Quarter (June 2026)
Revenue up 415 percent on bit shipments up low single digits: Kioxia did not sell more flash, it sold the same flash for far more, and the shares fell…
References
  1. ReportedRevenue by application in the year to March 2026: SSD & Storage ¥1,362,638M, Smart Devices ¥759,978M and Other ¥215,012M of ¥2,337,628M.
    Kioxia Holdings Corporation, Annual Securities Report for the year from 1 April 2025 to 31 March 2026 (8th Period) — revenue ¥2,337,628M against ¥1,706,460M, gross profit ¥1,012,904M, operating profit ¥869,013M, profit for the year ¥554,490M; research and development cost ¥141,052M against ¥132,798M; purchases of property, plant and equipment ¥281,062M against ¥223,847M; operating cash flow ¥616,540M; proceeds from government grants ¥56,396M against ¥43,748M, from an approved ceiling of ¥150.0bn for flash production at the Yokkaichi and Kitakami plants with about ¥31.8bn not yet received. Revenue by application: SSD & Storage ¥1,362,638M, Smart Devices ¥759,978M, Other ¥215,012M — 'Other' including retail products and sales to the Sandisk group recorded through the three manufacturing joint ventures. Revenue by geography: Japan ¥263,252M, North America and Europe ¥1,217,643M, Asia ¥856,733M, with the United States ¥1,098,832M, China ¥381,857M and Taiwan ¥300,932M. Non-current assets: Japan ¥1,658,950M, North America and Europe ¥1,986M, Asia ¥6,298M. Major customers: Apple group ¥476,014M (20.4%), with the Sandisk and Dell groups omitted for the year as each fell below 10% of sales. Flash Partners Ltd., Flash Alliance Ltd. and Flash Forward LLC are accounted for as joint operations with 50.1% of the voting rights and equal decision-making rights shared with Sandisk. Net interest-bearing debt ¥552,085M against equity of ¥1,398,929M — a net debt-to-equity ratio of 0.39 times, from ¥931,035M against ¥737,565M and 1.26 times a year earlier; USD-denominated senior notes at 6.25% (2030) and 6.625% (2033); goodwill of ¥395,585M from the 1 June 2018 acquisition of the former Toshiba Memory Corporation. Bain Capital funds indirectly hold 21.87% and Toshiba Corporation 17.59% of outstanding common shares, both having sold substantial holdings during the year. Risk factors state that the Yokkaichi Plant is located in an area with a high risk of earthquakes and floods and the Kitakami Plant in an area severely damaged by the 2011 Tohoku Earthquake, and name US-China trade frictions and US tariff policy among factors that may materially affect the business. The company does not provide plans or progress reports for the overall fiscal year. — year to 31 March 2026 · publ. 2026-06 · source ↗
  2. ReportedIn the June 2026 quarter drives were 66% of sales, with data-centre and enterprise drives more than 60% of that.
    Kioxia Holdings, first-quarter FY2026 results for the three months to 30 June 2026, as reported from the company's results presentation and earnings call — revenue ¥1,767.1bn, up 76.2% sequentially and 415.5% year on year; non-GAAP operating profit ¥1,326.2bn at a 75% margin; non-GAAP net income ¥887.0bn; non-GAAP EBITDA ¥1,402.1bn; adjusted non-GAAP gross profit ¥1,405.5bn, an 80% margin. Average selling prices rose about 70% with bit shipments growing a low single-digit percentage; eighth-generation BiCS FLASH exceeded 50% of total output. SSD & Storage ¥1,174.7bn, 66% of sales, with data centre and enterprise more than 60% of that and PC-related drives slightly below 40%; Smart Devices ¥525.7bn; Other ¥66.7bn. Operating cash flow ¥866.3bn, days inventory outstanding 102. Cash ¥791.0bn from ¥470.7bn, ¥407.5bn of senior loans repaid, a net cash position of ¥186.7bn against a net debt-to-equity ratio of 120% a year earlier, and an equity ratio of 51%. Guidance for the September quarter: revenue ¥2,390.0bn and non-GAAP operating profit ¥1,900.0bn, again roughly 70% of the growth from price. Capital expenditure of about ¥470bn a year is planned across the three years from FY2026, with roughly ¥200bn of research spending for the year and concentrated investment in the tenth and eleventh BiCS FLASH generations; the company targets roughly 50% long-term agreement coverage for calendar 2028. A buyback of up to 30 million shares (5.5% of those outstanding) for up to ¥800.0bn was authorised for 3 August to 30 October 2026, alongside a three-for-one share split with a 30 September 2026 record date. Calendar 2026 NAND bit growth is put in the high teens, with demand expected to exceed supply in 2027. — quarter to 30 June 2026 · publ. 2026-08-03 · source ↗
  3. ReportedGoodwill of ¥395,585M was recognised on the acquisition of the former Toshiba Memory Corporation on 1 June 2018.
    Kioxia Holdings Corporation, Annual Securities Report for the year from 1 April 2025 to 31 March 2026 (8th Period) — revenue ¥2,337,628M against ¥1,706,460M, gross profit ¥1,012,904M, operating profit ¥869,013M, profit for the year ¥554,490M; research and development cost ¥141,052M against ¥132,798M; purchases of property, plant and equipment ¥281,062M against ¥223,847M; operating cash flow ¥616,540M; proceeds from government grants ¥56,396M against ¥43,748M, from an approved ceiling of ¥150.0bn for flash production at the Yokkaichi and Kitakami plants with about ¥31.8bn not yet received. Revenue by application: SSD & Storage ¥1,362,638M, Smart Devices ¥759,978M, Other ¥215,012M — 'Other' including retail products and sales to the Sandisk group recorded through the three manufacturing joint ventures. Revenue by geography: Japan ¥263,252M, North America and Europe ¥1,217,643M, Asia ¥856,733M, with the United States ¥1,098,832M, China ¥381,857M and Taiwan ¥300,932M. Non-current assets: Japan ¥1,658,950M, North America and Europe ¥1,986M, Asia ¥6,298M. Major customers: Apple group ¥476,014M (20.4%), with the Sandisk and Dell groups omitted for the year as each fell below 10% of sales. Flash Partners Ltd., Flash Alliance Ltd. and Flash Forward LLC are accounted for as joint operations with 50.1% of the voting rights and equal decision-making rights shared with Sandisk. Net interest-bearing debt ¥552,085M against equity of ¥1,398,929M — a net debt-to-equity ratio of 0.39 times, from ¥931,035M against ¥737,565M and 1.26 times a year earlier; USD-denominated senior notes at 6.25% (2030) and 6.625% (2033); goodwill of ¥395,585M from the 1 June 2018 acquisition of the former Toshiba Memory Corporation. Bain Capital funds indirectly hold 21.87% and Toshiba Corporation 17.59% of outstanding common shares, both having sold substantial holdings during the year. Risk factors state that the Yokkaichi Plant is located in an area with a high risk of earthquakes and floods and the Kitakami Plant in an area severely damaged by the 2011 Tohoku Earthquake, and name US-China trade frictions and US tariff policy among factors that may materially affect the business. The company does not provide plans or progress reports for the overall fiscal year. — year to 31 March 2026 · publ. 2026-06 · source ↗
  4. Third-party estimateKioxia listed on 18 December 2024 at ¥1,455, traded near ¥54,570 on 18 September 2026, and reached ¥112,700 on 22 June 2026.
    Market data for Kioxia Holdings (TYO: 285A), stockanalysis.com - ¥54,570 a share on 18 September 2026, market capitalisation ¥29.91 trillion on 548.01 million shares, P/E 21.86 (companiesmarketcap: ¥29.94 trillion, $191.95 billion) — September 2026 · publ. 2026-09-18 · source ↗
  5. ReportedFlash Partners, Flash Alliance and Flash Forward are joint operations in which Kioxia holds 50.1% of the voting rights and shares decision-making equally with Sandisk.
    Kioxia Holdings Corporation, Annual Securities Report for the year from 1 April 2025 to 31 March 2026 (8th Period) — revenue ¥2,337,628M against ¥1,706,460M, gross profit ¥1,012,904M, operating profit ¥869,013M, profit for the year ¥554,490M; research and development cost ¥141,052M against ¥132,798M; purchases of property, plant and equipment ¥281,062M against ¥223,847M; operating cash flow ¥616,540M; proceeds from government grants ¥56,396M against ¥43,748M, from an approved ceiling of ¥150.0bn for flash production at the Yokkaichi and Kitakami plants with about ¥31.8bn not yet received. Revenue by application: SSD & Storage ¥1,362,638M, Smart Devices ¥759,978M, Other ¥215,012M — 'Other' including retail products and sales to the Sandisk group recorded through the three manufacturing joint ventures. Revenue by geography: Japan ¥263,252M, North America and Europe ¥1,217,643M, Asia ¥856,733M, with the United States ¥1,098,832M, China ¥381,857M and Taiwan ¥300,932M. Non-current assets: Japan ¥1,658,950M, North America and Europe ¥1,986M, Asia ¥6,298M. Major customers: Apple group ¥476,014M (20.4%), with the Sandisk and Dell groups omitted for the year as each fell below 10% of sales. Flash Partners Ltd., Flash Alliance Ltd. and Flash Forward LLC are accounted for as joint operations with 50.1% of the voting rights and equal decision-making rights shared with Sandisk. Net interest-bearing debt ¥552,085M against equity of ¥1,398,929M — a net debt-to-equity ratio of 0.39 times, from ¥931,035M against ¥737,565M and 1.26 times a year earlier; USD-denominated senior notes at 6.25% (2030) and 6.625% (2033); goodwill of ¥395,585M from the 1 June 2018 acquisition of the former Toshiba Memory Corporation. Bain Capital funds indirectly hold 21.87% and Toshiba Corporation 17.59% of outstanding common shares, both having sold substantial holdings during the year. Risk factors state that the Yokkaichi Plant is located in an area with a high risk of earthquakes and floods and the Kitakami Plant in an area severely damaged by the 2011 Tohoku Earthquake, and name US-China trade frictions and US tariff policy among factors that may materially affect the business. The company does not provide plans or progress reports for the overall fiscal year. — year to 31 March 2026 · publ. 2026-06 · source ↗
  6. ReportedThe Sandisk group was 15.8% of revenue in the year to March 2024 and 11.6% the year after.
    Kioxia Holdings Corporation, Annual Securities Report for the year from 1 April 2024 to 31 March 2025 (7th Period) — revenue ¥1,706,460M against ¥1,076,584M; revenue by application SSD & Storage ¥991,147M against ¥516,361M, Smart Devices ¥501,142M against ¥374,293M, Other ¥214,171M against ¥185,930M. Major customers, with the ratio to total sales: Apple group ¥225.3bn (20.9%) in the year to March 2024 and ¥300.5bn (17.6%) in the year to March 2025; Sandisk group ¥170.5bn (15.8%) and ¥198.6bn (11.6%); Dell group ¥94.0bn (8.7%) and ¥171.2bn (10.0%). Revenue in the United States ¥758,666M against ¥393,909M and in China ¥323,357M against ¥217,870M; non-current assets in Japan ¥1,714,351M against ¥1,737,806M. Total equity ¥737.7bn against ¥449.8bn. — year to 31 March 2025 · publ. 2025-06 · source ↗
  7. ReportedAverage selling prices rose about 70% in the June 2026 quarter while bit shipments grew a low single-digit percentage.
    Kioxia Holdings, first-quarter FY2026 results for the three months to 30 June 2026, as reported from the company's results presentation and earnings call — revenue ¥1,767.1bn, up 76.2% sequentially and 415.5% year on year; non-GAAP operating profit ¥1,326.2bn at a 75% margin; non-GAAP net income ¥887.0bn; non-GAAP EBITDA ¥1,402.1bn; adjusted non-GAAP gross profit ¥1,405.5bn, an 80% margin. Average selling prices rose about 70% with bit shipments growing a low single-digit percentage; eighth-generation BiCS FLASH exceeded 50% of total output. SSD & Storage ¥1,174.7bn, 66% of sales, with data centre and enterprise more than 60% of that and PC-related drives slightly below 40%; Smart Devices ¥525.7bn; Other ¥66.7bn. Operating cash flow ¥866.3bn, days inventory outstanding 102. Cash ¥791.0bn from ¥470.7bn, ¥407.5bn of senior loans repaid, a net cash position of ¥186.7bn against a net debt-to-equity ratio of 120% a year earlier, and an equity ratio of 51%. Guidance for the September quarter: revenue ¥2,390.0bn and non-GAAP operating profit ¥1,900.0bn, again roughly 70% of the growth from price. Capital expenditure of about ¥470bn a year is planned across the three years from FY2026, with roughly ¥200bn of research spending for the year and concentrated investment in the tenth and eleventh BiCS FLASH generations; the company targets roughly 50% long-term agreement coverage for calendar 2028. A buyback of up to 30 million shares (5.5% of those outstanding) for up to ¥800.0bn was authorised for 3 August to 30 October 2026, alongside a three-for-one share split with a 30 September 2026 record date. Calendar 2026 NAND bit growth is put in the high teens, with demand expected to exceed supply in 2027. — quarter to 30 June 2026 · publ. 2026-08-03 · source ↗
  8. ReportedIn the year to March 2024 revenue was ¥1,076,584M against cost of sales of ¥1,205,927M, and the loss for the year was ¥243,728M.
    Kioxia Holdings Corporation, consolidated results for the year to 31 March 2024 (reported in the Annual Securities Report for the following year) — revenue ¥1,076,584M against cost of sales of ¥1,205,927M, a gross loss of ¥129,343M, an operating loss of ¥252,698M and a loss for the year of ¥243,728M; the year to 31 March 2023 recorded revenue of ¥1,282,101M, an operating loss of ¥99,015M and a loss for the year of ¥138,141M. — years to 31 March 2023 and 2024 · publ. 2025-06 · source ↗
Sources
Generated September 23, 2026