Sumitomo Electric Industries, Ltd Overview
SEI is a ¥5.1 trillion diversified industrial-materials group built on more than 125 years of copper-wire know-how. Three franchises underpin it: the world's leading automotive wiring-harness business, which brings in about 57% of sales; a top-tier power-cable and HVDC business riding grid investment in Europe and Japan; and an infocommunications business that has become one of the most direct Japanese plays on AI data-centre optics. That last business supplies optical fibre and cable, MT ferrules and optical connectivity, InP-based laser and photodiode devices, and the InP substrates that sit beneath them. A smaller electronics segment adds GaAs/InP/GaN substrates, flexible printed circuits and high-speed cables. Industrial materials adds cemented-carbide tools and tungsten, now in high demand because of Chinese export controls. The group reached record profits in FY2025 with operating profit of ¥418.2 billion and an 8.2% margin. Its Mid-term Management Plan 2028 targets ¥6 trillion of sales, ¥600 billion of operating profit and pre-tax ROIC above 15%.
What the company does
SEI designs, makes and sells products that "connect" and "support" infrastructure, in the company's own phrasing. Its core competence is conductor and insulation technology: drawing and processing copper and aluminium, polymer and rubber compounding, and glass (optical fibre). Around that core it has built related material and device technologies, including compound-semiconductor crystal growth, powder metallurgy and cemented carbide, electron-beam irradiation and fine-pitch circuit fabrication.
The group reports five segments:
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Environment & Energy: power cables (including HVDC land and submarine systems), overhead transmission conductors, copper wire rod, magnet and rectangular winding wire for electric-vehicle motors, and substation and power equipment through Nissin Electric.
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Infocommunications: optical fibre and cable, fusion splicers, optical connectors and MT ferrules, optical devices for data-centre transceivers, GaN RF transmission devices, and access-network equipment.
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Automotive: wiring harnesses through Sumitomo Wiring Systems and its global SEWS network, connectors and electrical components, plus anti-vibration rubber and hoses through Sumitomo Riko.
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Electronics: electronic wire and high-speed cables, flexible printed circuits (FPC), irradiated products such as heat-shrink tubing, fluororesin products, and compound semiconductor substrates (GaAs, InP, GaN).
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Industrial Materials & Others: cemented-carbide, diamond and CBN cutting tools; sintered powder-metal parts; PC steel strand and special steel wire; and tungsten/molybdenum materials through A.L.M.T.
Business and revenue model
| Revenue type | Character | Where it sits |
|---|---|---|
| Built-to-order components | Volume production on multi-year vehicle programmes; prices partly indexed to copper | Automotive (wiring harnesses) |
| Engineered systems / EPC | Multi-year turnkey projects, recognised over time | Environment & Energy (HVDC, EHV cable) |
| Merchant materials | Spot and contract sales at commodity-linked prices | Copper wire rod, magnet wire, special wire, tungsten |
| Technology products | Higher-margin, specification-driven sales | Optical devices, MT ferrules, InP/GaAs substrates, carbide tools |
| Services | Installation, maintenance, construction | Mainly within Environment & Energy |
SEI is overwhelmingly a product company. Revenue comes from making and selling physical goods under contract or purchase order. The only material service or project revenue is in power-cable engineering, procurement and construction (EPC), where long-duration HVDC contracts are booked over time. Electrical construction services were a second service line until Sumitomo Densetsu was sold and dropped out of consolidation in FY2025. Subscription and licensing revenue is negligible and not separately disclosed.
Built-to-order components: Character: Volume production on multi-year vehicle programmes; prices partly indexed to copper; Where it sits: Automotive (wiring harnesses)
Engineered systems / EPC: Character: Multi-year turnkey projects, recognised over time; Where it sits: Environment & Energy (HVDC, EHV cable)
Merchant materials: Character: Spot and contract sales at commodity-linked prices; Where it sits: Copper wire rod, magnet wire, special wire, tungsten
Technology products: Character: Higher-margin, specification-driven sales; Where it sits: Optical devices, MT ferrules, InP/GaAs substrates, carbide tools
Services: Character: Installation, maintenance, construction; Where it sits: Mainly within Environment & Energy
Value-chain position
SEI is a mid-stream manufacturer. It turns refined copper, aluminium, tungsten, indium, gallium, rubber and silica into engineered intermediate products sold to OEMs, utilities, transmission system operators (TSOs) and hyperscale data-centre builders. In compound semiconductors it sits upstream: it grows single-crystal GaAs and InP ingots and slices them into polished wafers for epitaxy houses and laser and photodiode makers, while also running its own downstream device lines at Sumitomo Electric Device Innovations (SEDI). This mix of merchant substrate supplier and device maker is a strategic feature and an occasional source of tension with customers.
Customer types and end-markets
| Customer type | Examples of end-market | Segment |
|---|---|---|
| Automotive OEMs (Japan, North America, ASEAN, Europe, China) | Passenger vehicles, EVs, commercial vehicles | Automotive |
| Electric utilities and TSOs | Grid expansion, offshore-wind connection, interconnectors | Environment & Energy |
| Hyperscalers, data-centre builders, transceiver makers | AI data centres, data-centre interconnect | Infocommunications |
| Telecom carriers | FTTH, 5G backhaul, submarine systems | Infocommunications |
| Electronics OEMs | Smartphones, PCs, servers, wearables | Electronics |
| Epitaxy houses and device makers | Lasers, photodiodes, RF power amplifiers, VCSELs | Electronics (substrates) |
| Machining industry | Automotive, aerospace and die-and-mould machining | Industrial Materials |
Automotive OEMs (Japan, North America, ASEAN, Europe, China): Examples of end-market: Passenger vehicles, EVs, commercial vehicles; Segment: Automotive
Electric utilities and TSOs: Examples of end-market: Grid expansion, offshore-wind connection, interconnectors; Segment: Environment & Energy
Hyperscalers, data-centre builders, transceiver makers: Examples of end-market: AI data centres, data-centre interconnect; Segment: Infocommunications
Telecom carriers: Examples of end-market: FTTH, 5G backhaul, submarine systems; Segment: Infocommunications
Electronics OEMs: Examples of end-market: Smartphones, PCs, servers, wearables; Segment: Electronics
Epitaxy houses and device makers: Examples of end-market: Lasers, photodiodes, RF power amplifiers, VCSELs; Segment: Electronics (substrates)
Machining industry: Examples of end-market: Automotive, aerospace and die-and-mould machining; Segment: Industrial Materials
The company's own description
SEI describes its management base as the "Sumitomo Spirit" and the Sumitomo Electric Group Corporate Principles. Its long-term vision, Sumitomo Electric Group 2030 VISION, aims to "contribute to a better society and green planet" through "connecting" and "supporting" technologies. It frames returns to stakeholders as "Goho Yoshi" (Five-Way Win), meaning a fair distribution of value to customers, employees, suppliers, communities and shareholders. Under Mid-term Management Plan 2028 the group concentrates on three focus fields — Digital/AI, Energy and Mobility — and on the areas where they overlap.
Independent characterisation
SEI is best read as three businesses with different cycles inside one balance sheet:
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A large, low-margin automotive harness franchise. It earns about 6% operating margins and is exposed to vehicle volumes, copper pass-through lags and logistics shocks.
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A mid-margin energy business, at roughly 8% operating margin, with a growing multi-year HVDC backlog.
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A small but rapidly expanding high-margin optical franchise. Infocommunications reached a 23.7% operating margin in FY2025 and was above 31% in the first quarter of FY2026. It now produces earnings far out of proportion to its sales share.
The market has re-rated and then de-rated SEI on that third leg. That swing is why the share price has been far more volatile in 2026 than its reported earnings.
Strategy
Long-term vision and Mid-term Management Plan 2028
The Sumitomo Electric Group 2030 VISION aims to "contribute to a better society and green planet." Mid-term Management Plan 2028 (FY2026–FY2028), announced on 12 May 2026, is described as "the second step" towards that vision. Its themes:
Three pillars: 1. Demonstrate the integrated capabilities of the group.
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Respond with precision to trends in the global business environment.
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Capture green (GX) and digital (DX) demand.
Three focus fields: - Digital/AI: raise share of the hyperscale data-centre market, mainly in North America, with high-performance products for digital infrastructure.
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Energy: strengthen cable manufacturing and installation worldwide and win orders as a "local company" in each market.
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Mobility: build on wiring-harness leadership to become a "global mobility supplier."
Capital base: "three capitals" and "three driving forces" — people, technology and manufacturing — supporting the focus fields.
Stakeholder returns ("Goho Yoshi"): the plan sets explicit, quantified return targets for customers, employees, suppliers, communities and shareholders.
Financial targets
| Metric | FY2025 actual | FY2026 guidance (October 2026) | FY2028 target |
|---|---|---|---|
| Net sales (JPY bn) | 5,110.2 | 5,750.0 | 6,000.0 |
| Operating profit (JPY bn) | 418.2 | 500.0 | 600.0 |
| Operating margin (%) | 8.2 | 8.7 | 10.0 |
| Pre-tax ROIC (%) | 14.7 | — | above 15 |
| Three-year cumulative capex (JPY bn) | — | — | 1,000 |
| Three-year cumulative R&D (JPY bn) | — | — | 540 |
Net sales (JPY bn): FY2025 actual: 5110.2; FY2026 guidance (October 2026): 5750.0; FY2028 target: 6000.0
Operating profit (JPY bn): FY2025 actual: 418.2; FY2026 guidance (October 2026): 500.0; FY2028 target: 600.0
Operating margin (%): FY2025 actual: 8.2; FY2026 guidance (October 2026): 8.7; FY2028 target: 10.0
Pre-tax ROIC (%): FY2025 actual: 14.7; FY2026 guidance (October 2026): —; FY2028 target: above 15
Three-year cumulative capex (JPY bn): FY2025 actual: —; FY2026 guidance (October 2026): —; FY2028 target: 1000
Three-year cumulative R&D (JPY bn): FY2025 actual: —; FY2026 guidance (October 2026): —; FY2028 target: 540
FY2026 guidance after the October revision already implies sales 96% of the way to the FY2028 target and operating profit 83% of the way. The plan's numbers are therefore conservative unless optics demand slows sharply.
Earlier plan — Mid-term Management Plan 2025
The FY2023–FY2025 plan targeted sales of about ¥4.8 trillion and operating profit of about ¥320 billion by FY2025. Actual FY2025 results were ¥5.11 trillion and ¥418.2 billion, so both targets were exceeded. The President described the plan's goals as "successfully achieved."
Strategic initiatives in the last 24 months
| Initiative | Date | Description | Target / scale |
|---|---|---|---|
| European HVDC localisation | June 2024 onward | Acquisition of Südkabel and expansion of Mannheim capacity | ~€30 million capital injection plus ~€90 million capacity investment |
| Unwinding of listed subsidiaries | October 2025 – March 2026 | Sumitomo Riko taken 100% private; Sumitomo Densetsu sold to Daiwa House | ~¥133 billion outlay for Riko; ~¥79 billion gain on Densetsu |
| InP substrate capacity | November 2025; expanded July 2026 | First plan: 2.4 times the FY2023 level. Raised plan: 3.1 times the FY2024 level by FY2028, by upgrading existing Itami lines | ~¥18 billion |
| MT ferrule capacity | 2,026 | Expand to about 7 times the FY2024 level for data-centre and CPO connectivity | Not quantified in yen |
| European EPC subsidiary | February 2026 | SEP-E set up in Düsseldorf for project engineering, procurement and construction | — |
| Tungsten capacity | April 2026 | A.L.M.T. tungsten plant raising capacity by ~50% | ¥15.9 billion |
| Multi-core fibre for AI campuses | March 2026 | Industry collaboration to define a multi-core fibre design optimised for AI data centres | — |
| Shareholder accessibility | 1 July 2026 | 4-for-1 stock split | — |
| Dividend policy | October 2025 onward | ~40% payout on "normalised" profit, excluding one-off capital gains | FY2026 DPS ¥44 (post-split) |
| Inventory and cross-shareholding reduction | Ongoing | Asset-efficiency programme supporting the ROIC target | ROIC above 15% |
| SF6-free HVDC terminations | 2,026 | First use on DC35 | EU decarbonisation alignment |
European HVDC localisation: Date: June 2024 onward; Description: Acquisition of Südkabel and expansion of Mannheim capacity; Target / scale: ~€30 million capital injection plus ~€90 million capacity investment
Unwinding of listed subsidiaries: Date: October 2025 – March 2026; Description: Sumitomo Riko taken 100% private; Sumitomo Densetsu sold to Daiwa House; Target / scale: ~¥133 billion outlay for Riko; ~¥79 billion gain on Densetsu
InP substrate capacity: Date: November 2025; expanded July 2026; Description: First plan: 2.4 times the FY2023 level. Raised plan: 3.1 times the FY2024 level by FY2028, by upgrading existing Itami lines; Target / scale: ~¥18 billion
MT ferrule capacity: Date: 2026; Description: Expand to about 7 times the FY2024 level for data-centre and CPO connectivity; Target / scale: Not quantified in yen
European EPC subsidiary: Date: February 2026; Description: SEP-E set up in Düsseldorf for project engineering, procurement and construction; Target / scale: —
Tungsten capacity: Date: April 2026; Description: A.L.M.T. tungsten plant raising capacity by ~50%; Target / scale: ¥15.9 billion
Multi-core fibre for AI campuses: Date: March 2026; Description: Industry collaboration to define a multi-core fibre design optimised for AI data centres; Target / scale: —
Shareholder accessibility: Date: 1 July 2026; Description: 4-for-1 stock split; Target / scale: —
Dividend policy: Date: October 2025 onward; Description: ~40% payout on "normalised" profit, excluding one-off capital gains; Target / scale: FY2026 DPS ¥44 (post-split)
Inventory and cross-shareholding reduction: Date: Ongoing; Description: Asset-efficiency programme supporting the ROIC target; Target / scale: ROIC above 15%
SF6-free HVDC terminations: Date: 2026; Description: First use on DC35; Target / scale: EU decarbonisation alignment
Sustainability commitments
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2030 greenhouse-gas targets validated by the Science Based Targets initiative: Scope 1+2 down 30% and Scope 3 down 15% versus FY2018.
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Carbon neutrality by 2050.
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Support for the TCFD recommendations.
Products & Services
Environment & Energy
| Product line | Description and key capabilities | Target customers | Flagship / latest |
|---|---|---|---|
| HVDC XLPE cable systems | Extruded DC cables up to 525 kV with an in-house XLPE insulation formulation that has run commercially at 90 °C conductor temperature for more than 10 years | TSOs, interconnector developers, offshore-wind connections | Amprion A-Nord (2020), Korridor B V49 (2024), DC35 (2026); Greenlink Ireland–Wales (installation completed) |
| HVDC submarine cable | Long-length submarine DC cable; a UK subsea cable factory is under construction | Interconnectors, offshore wind | NeuConnect (150 km of HVDC submarine cable supplied under Prysmian), Sea Link (National Grid Electricity Transmission, 140 km), SSEN Transmission framework (2026, with Van Oord) |
| EHV AC underground cable | 66–500 kV XLPE cable and accessories | Japanese and overseas utilities, data-centre grid connections | — |
| SF6-free DC terminations | Cable terminations that do not use SF6 insulating gas | European TSOs | First SEI deployment on DC35 |
| Overhead conductors | ACSR, gap-type and low-sag conductors for increasing line capacity | Utilities | — |
| Copper wire rod (SCR) | Continuous-cast copper rod | Wire and cable makers | Commodity-linked pricing |
| Magnet wire / rectangular winding wire | Enamelled flat wire for EV traction motors | EV motor makers, Tier-1s | FY2025 growth driver |
| Power equipment (Nissin Electric) | Substation equipment, capacitors, power-quality systems, ion-beam and semiconductor equipment | Utilities, industry, semiconductor fabs | Wholly owned since 2023 |
| Redox-flow batteries | Vanadium redox-flow storage systems | Utilities, renewable-energy developers | — |
| Superconducting wire | DI-BSCCO high-temperature superconducting wire | Research, cables, magnets | — |
Infocommunications
| Product line | Description and key capabilities | Target customers | Flagship / latest |
|---|---|---|---|
| Optical fibre | Pure-silica-core ultra-low-loss fibre (Z-fibre family), bend-insensitive fibre, multi-core fibre; first mass production of multi-core fibre for submarine cables | Carriers, submarine-system integrators, hyperscalers | March 2026 industry collaboration on a multi-core fibre design for AI data-centre campuses |
| Optical cable | High-density ribbon cables for data-centre and access networks | Hyperscalers, carriers | — |
| Fusion splicers | Core-alignment fusion splicers and related tools | Installers, carriers | Long-standing global leader |
| MT ferrules and multi-fibre connectors | Precision MT ferrules for MPO connectors and co-packaged optics (CPO) | Transceiver and connector makers, hyperscalers | Capacity being raised to about 7 times the FY2024 level |
| Data-centre optical devices | InP-based lasers (EML/DML), photodiodes and receivers for 800G/1.6T transceivers; external laser sources for CPO | Transceiver module makers, hyperscalers | Main driver of FY2025–FY2026 profit growth |
| GaN HEMT RF devices | GaN-on-SiC high-power amplifiers | 5G base-station makers, radar and satellite | Made by SEDI |
| Access network | 10G-EPON OLT/ONU, cable-TV and broadband equipment | Carriers, cable operators | Coherent pluggable 10G-EPON demonstration with Infinera (2023) |
| Network solutions | All-Photonics Network (APN) equipment for IOWN | Carriers, broadcasters | IOWN Global Forum 2026 Implementation of the Year Award (November 2026) |
Automotive
| Product line | Description and key capabilities | Target customers | Flagship / latest |
|---|---|---|---|
| Wiring harnesses | Full vehicle wiring systems for low and high voltage, including aluminium and lighter-gauge harnesses | Global OEMs, with strength in Japanese, North American and ASEAN programmes | World leader by volume, alongside Yazaki |
| High-voltage EV harnesses | Shielded orange cable systems for battery, inverter and motor | EV and hybrid OEMs | — |
| Connectors and electrical components | Terminals, connectors, junction boxes, electronic units | OEMs, Tier-1s | Developed with AutoNetworks Technologies |
| In-vehicle network | Automotive Ethernet harnesses and components for zonal architectures | OEMs | — |
| Anti-vibration rubber and hoses | Engine and suspension mounts, hoses, interior parts | OEMs | Sumitomo Riko, wholly owned from FY2025 |
| Regional SEWS companies | Local harness design and assembly in Europe, the Americas and Asia | OEMs | SEWS-E (UK), Sumitomo Electric Bordnetze (Germany), SEWS-CABIND (Italy) |
Electronics
| Product line | Description and key capabilities | Target customers | Flagship / latest |
|---|---|---|---|
| Electronic wire and high-speed cables | Ultra-fine coaxial cables and high-speed data cables | PC, smartphone and server makers | Thunderbolt 5 cables shown at electronica 2026 |
| Flexible printed circuits | Fine-pitch single- and multilayer FPC | Smartphones, wearables, automotive | — |
| Irradiated products | Electron-beam cross-linked heat-shrink tubing (SUMITUBE) and irradiated wire | Electronics, automotive, aerospace | — |
| Fluororesin products | Porous PTFE membranes and filters (POREFLON) | Semiconductor, water treatment, industry | — |
| GaAs substrates | Semi-insulating and conductive GaAs wafers for RF power amplifiers, VCSELs and LEDs | Epitaxy houses, RF and VCSEL device makers | Itami Works; GaAs history since 1970 |
| InP substrates | Single-crystal InP wafers, about 40% global share alongside JX Advanced Metals | Laser and photodiode makers for optical transceivers | Capacity planned at 3.1 times FY2024 by FY2028 (about ¥18 billion investment at Itami) |
| GaN substrates | Free-standing GaN wafers | Laser-diode and power-device makers | — |
| SiC epitaxial wafers | SiC epitaxial wafers for power devices | Power-semiconductor makers | — |
Industrial Materials & Others
| Product line | Description and key capabilities | Target customers | Flagship / latest |
|---|---|---|---|
| Cemented-carbide tools | Coated carbide inserts and solid tools (IGETALLOY brand) | Automotive, aerospace, general machining | Large FY2026 pull-forward of orders on tungsten scarcity |
| Diamond and CBN tools | Polycrystalline diamond (SUMIDIA) and CBN (SUMIBORON) tools | Hard-material and non-ferrous machining | — |
| Tungsten and molybdenum | Powder, wire and parts through A.L.M.T. | Tools, lighting, electronics, semiconductor | ¥15.9 billion tungsten plant raising capacity by about 50% (April 2026) |
| Sintered powder-metal parts | Engine and transmission parts | Auto Tier-1s | — |
| PC steel strand and special wire | Prestressing strand, spring and bead wire, steel cord | Construction, automotive | — |
| Other | Traffic-control systems and other businesses | Public authorities, industry | — |
Prices are set through commercial negotiation and are not published for any product line. Copper-based products carry metal surcharges or pass-through clauses.
Financial Narrative
Income statement
There are no potentially dilutive shares, so diluted EPS equals basic EPS.
Margins and growth
Revenue CAGR was 11.0% for FY2021–FY2025 (four years) and 11.9% for FY2020–FY2025 (five years, from ¥2,918.6 billion in FY2020).
Commentary.
Top line: Sales rose 75% from the pandemic low of FY2020. Roughly half the gain came from price: copper pass-through and a weaker yen (USD/JPY averaged about 145 in Q1 FY2025 and about 160 in Q1 FY2026). The other half came from volume, especially harness content in North America and ASEAN, power cable and, from FY2024, data-centre optics.
Margins: Operating margin more than doubled from 3.6% to 8.2% in four years. The main inflection was FY2024, when operating margin rose 1.8 points as automotive productivity recovered, energy projects delivered and the yen weakened. FY2025 added 1.3 points as Infocommunications profit almost quadrupled (+¥57.5 billion). Gross margin above 20% in FY2025 is a multi-decade high for the group.
Below the line: FY2025 pre-tax income (¥505.2 billion) was well above ordinary profit (¥431.3 billion) because of a ¥79.2 billion extraordinary gain on the sale of Sumitomo Densetsu shares. Management had earlier guided to roughly ¥70 billion for this gain. Without it, net income would have grown roughly 50% rather than the reported 90.7%. The effective tax rate fell to about 21% in FY2025 from 27% in FY2024.
Quarterly path: In FY2025, quarterly operating profit rose steadily: ¥60.3 billion, ¥92.7 billion, ¥118.0 billion and ¥147.1 billion, with a fourth-quarter margin of 10.3%. FY2026 has continued at ¥97.1 billion in Q1 and ¥122.5 billion in Q2, which is a record second quarter.
Balance sheet
Debt and working-capital detail (¥bn)
As of 30 September 2026, total assets were ¥5,189.9 billion, owners' equity was ¥2,875.6 billion and the equity ratio was 55.4%. Interest-bearing debt rose to ¥826.2 billion at 30 June 2026 as working capital built up with copper prices and as the Sumitomo Riko acquisition and its bonds were absorbed.
Commentary. The balance sheet has strengthened steadily. Interest-bearing debt fell by about ¥250 billion from its FY2022 peak, while owners' equity rose about ¥840 billion over the five years. Most of the equity increase came from retained earnings, with about ¥600 billion of comprehensive income in FY2025 from yen-translation gains and higher valuations of securities. Goodwill and intangibles are negligible at about 1.3% of assets because SEI has grown organically and through minority buy-ins rather than large acquisitions. The weak spot is inventory: ¥1,018 billion at FY2025 year-end, rising to ¥1,140 billion by June 2026. That is a consequence of copper inflation and of building safety stock in optics and tungsten, but it ties up capital.
Cash flow
Commentary. Operating cash flow fell to ¥76 billion in FY2021 as working capital absorbed about ¥219 billion when copper prices surged after the pandemic. It has since settled at around ¥400 billion a year. Cash capex has been close to depreciation, at about 1.05 times, while the company-defined capex of ¥243 billion in each of FY2024 and FY2025 shows growth spending now running ahead of depreciation. The ¥1 trillion three-year capex plan under Mid-term Management Plan 2028 implies about ¥333 billion a year. That is roughly 40% above the FY2025 level and will absorb most organic free cash flow. In FY2025, the cash from the Sumitomo Densetsu exit helped fund the Sumitomo Riko buy-in and debt repayment, which explains the large financing outflow. Treasury stock has stayed at about ¥20.8 billion for five years, confirming that no buyback programme has run.
Ratios
Commentary. ROE reached 14.7% in FY2025, its highest in decades, though the Densetsu gain flatters it. The company's own FY2026 plan implies ROE of about 12%. Pre-tax ROIC rose from 9.3% to 14.7%, already close to the ">15%" target for FY2028. Leverage is conservative, at net debt below 1 times EBITDA. Interest coverage dipped in FY2023 as overseas interest rates rose, then recovered as debt fell. The weakest metric is the cash conversion cycle of about 114 days, which is long for a manufacturer and reflects harness inventory spread across global plants and copper and tungsten stockholding.
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Segment Overview
| Segment | Contents | Principal products | Key group companies |
|---|---|---|---|
Environment & Energy | Power transmission and distribution, electrical materials, power equipment | EHV and HVDC cables, overhead conductors, copper wire rod, magnet and rectangular wire, substation equipment, redox-flow batteries | SEI Power Cable Division, Südkabel, Sumitomo Electric Power Cable (Europe) (SEP-E), Nissin Electric. Sumitomo Densetsu left consolidation in FY2025 |
Infocommunications | Optical and wireless communications | Optical fibre and cable, fusion splicers, MT ferrules and optical connectors, data-centre optical devices, GaN HEMT RF devices, PON equipment | SEI Optical Communications, Sumitomo Electric Device Innovations, Sumitomo Electric Lightwave (USA) |
Automotive | Vehicle electrical distribution and vibration control | Wiring harnesses, connectors, electrical components, anti-vibration rubber, hoses | Sumitomo Wiring Systems, AutoNetworks Technologies, SEWS regional companies, Sumitomo Riko |
Electronics | Electronic components and materials | Electronic wire and high-speed cables, FPCs, heat-shrink tubing, fluororesin products, GaAs/InP/GaN substrates, SiC epitaxial wafers | Sumitomo Electric Printed Circuits, SEI Compound Semiconductor operations (Itami) |
Industrial Materials & Others | Hard materials, special metals, wire products | Carbide, diamond and CBN tools; sintered parts; PC strand; special steel wire; tungsten and molybdenum | Sumitomo Electric Hardmetal, A.L.M.T., Sumitomo (SEI) Steel Wire |
Environment & Energy | 1,010.1 | 26.3 | 9.0% |
Infocommunications | 367.4 | 16.0 | 21.1% |
Automotive | 2,458.1 | 122.6 | 7.3% |
Electronics | 353.9 | 20.3 | 11.2% |
Industrial Materials & Others | 1,167.8 | 24.7 | 2.7% |
Adjustments | -532.8 | — | — |
Total | 4,824.5 | — | — |
Segment Revenue
| Segment | FY2024 sales (JPY Bn) | FY2025 sales (JPY Bn) | YoY sales | FY2024 OP (JPY Bn) | FY2025 OP (JPY Bn) | FY2024 OP margin | FY2025 OP margin | Share of FY2025 sales |
|---|---|---|---|---|---|---|---|---|
Environment & Energy | 1,081.3 | 1,178.8 | +9.0% | 78.7 | 90.6 | 7.3% | 7.7% | 23.1% |
Infocommunications | 223.3 | 326.6 | +46.3% | 19.9 | 77.4 | 8.9% | 23.7% | 6.4% |
Automotive | 2,734.7 | 2,937.2 | +7.4% | 172.4 | 179.7 | 6.3% | 6.1% | 57.5% |
Electronics | 377.2 | 409.1 | +8.4% | 29.3 | 39.5 | 7.8% | 9.7% | 8.0% |
Industrial Materials & Others | 372.7 | 388.4 | +4.2% | 20.6 | 31.4 | 5.5% | 8.1% | 7.6% |
Eliminations | -109.5 | -129.9 | — | — | -0.5 | — | — | — |
Consolidated | 4,679.8 | 5,110.2 | +9.2% | 320.7 | 418.2 | 6.9% | 8.2% | 100% |
Revenue by Segment
| Segment | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|
Environment & Energy sales (JPY Bn) | 833.4 | 928.2 | 980.0 | 1,081.3 | 1,178.8 |
Infocommunications sales (JPY Bn) | 239.2 | 250.3 | 206.1 | 223.3 | 326.6 |
Automotive sales (JPY Bn) | 1,754.2 | 2,186.8 | 2,596.4 | 2,734.7 | 2,937.2 |
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View Subscription PlansRevenue by Segment (FY2024–FY2025)
| Segment | FY2024 | FY2025 |
|---|---|---|
Environment & Energy OP (JPY Bn) | 78.7 | 90.6 |
Infocommunications OP (JPY Bn) | 19.9 | 77.4 |
Automotive OP (JPY Bn) | 172.4 | 179.7 |
Electronics OP (JPY Bn) | 29.3 | 39.5 |
Industrial Materials & Others OP (JPY Bn) | 20.6 | 31.4 |
Segment Revenue (Quarterly)
| Segment | Q1 FY2025 sales (JPY Bn) | Q1 FY2026 sales (JPY Bn) | Q1 FY2025 OP (JPY Bn) | Q1 FY2026 OP (JPY Bn) | FY2026 OP guidance, July (JPY Bn) | FY2026 OP guidance, October (JPY Bn) |
|---|---|---|---|---|---|---|
Environment & Energy | 262.9 | 253.0 | 13.6 | 15.3 | 50.0 | not separately updated |
Infocommunications | 61.7 | 86.5 | 8.1 | 27.2 | 133.0 | 156.0 |
Automotive | 670.6 | 802.8 | 26.6 | 26.0 | 180.0 | 165.0 |
Electronics | 90.0 | 110.6 | 6.3 | 11.7 | 37.0 | not separately updated |
Industrial Materials & Others | 92.9 | 115.7 | 5.6 | 17.0 | 50.0 | 76.0 |
Total | 1,148.4 | 1,330.6 | 60.3 | 97.1 | 450.0 | 500.0 |
Income Statement and Margin Analysis (%)
| Metric | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|
Revenue (JPY Bn) | 3,367.9 | 4,005.6 | 4,402.8 | 4,679.8 | 5,110.2 |
Revenue growth (%) | 15.4 | 18.9 | 9.9 | 6.3 | 9.2 |
Gross profit (JPY Bn) | 573.9 | 670.0 | 767.6 | 880.1 | 1,034.0 |
SG&A (JPY Bn) | 451.7 | 492.5 | 541.0 | 559.5 | 615.9 |
Operating income (JPY Bn) | 122.2 | 177.4 | 226.6 | 320.7 | 418.2 |
Operating income growth (%) | 7.3 | 45.2 | 27.7 | 41.5 | 30.4 |
EBITDA (OP + D&A, JPY Bn) | 302.7 | 373.4 | 432.9 | 526.8 | 628.0 |
Ordinary profit (JPY Bn) | 138.2 | 173.3 | 215.3 | 309.5 | 431.3 |
Pre-tax income (JPY Bn) | 159.9 | 196.5 | 238.5 | 304.1 | 505.2 |
Net income attributable to owners (JPY Bn) | 96.3 | 112.7 | 149.7 | 193.8 | 369.5 |
EPS basic, pre-split (JPY) | 123.49 | 144.45 | 191.98 | 248.47 | 473.78 |
EPS basic, split-adjusted (JPY) | 30.87 | 36.11 | 48.00 | 62.12 | 118.44 |
EPS diluted (JPY) | 123.49 | 144.45 | 191.98 | 248.47 | 473.78 |
Dividend per share, pre-split (JPY) | 50 | 50 | 77 | 97 | 154 |
Dividend per share, split-adjusted (JPY) | 12.50 | 12.50 | 19.25 | 24.25 | 38.50 |
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View Subscription PlansMargin Analysis (%)
| Metric | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|
Gross margin (%) | 17.0 | 16.7 | 17.4 | 18.8 | 20.2 |
Operating margin (%) | 3.6 | 4.4 | 5.1 | 6.9 | 8.2 |
EBITDA margin (%) | 9.0 | 9.3 | 9.8 | 11.3 | 12.3 |
Net margin (%) | 2.9 | 2.8 | 3.4 | 4.1 | 7.2 |
Balance Sheet and Margin Analysis (%)
| Metric | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|
Total assets (JPY Bn) | 3,807.4 | 4,013.0 | 4,365.4 | 4,441.6 | 4,824.5 |
Owners' equity (JPY Bn) | 1,769.8 | 1,899.9 | 2,207.7 | 2,290.4 | 2,743.4 |
Total net assets incl. minorities (JPY Bn) | 2,052.9 | 2,110.8 | 2,431.9 | 2,530.4 | 2,835.0 |
Interest-bearing debt (JPY Bn) | 859.8 | 960.4 | 801.5 | 775.9 | 709.8 |
Working capital (JPY Bn) | 796.8 | 763.3 | 934.8 | 1,033.2 | 1,076.9 |
Owners' equity ratio (%) | 46.5 | 47.3 | 50.6 | 51.6 | 56.9 |
Owners' equity per share, pre-split (JPY) | 2,269.31 | 2,436.14 | 2,830.82 | 2,936.93 | 3,517.58 |
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View Subscription PlansKey Financials
| Metric | FY2023 | FY2024 | FY2025 |
|---|---|---|---|
Cash and cash equivalents (JPY Bn) | 268.3 | 294.5 | 235.9 |
Net debt (JPY Bn) | 533.2 | 481.4 | 473.9 |
Financial Analysis
| Item | FY2024 | FY2025 |
|---|---|---|
Short-term borrowings | 314.3 | 210.7 |
Commercial paper | 32.4 | 63.3 |
Current portion of bonds | 0.0 | 45.0 |
Bonds (non-current) | 174.9 | 129.9 |
Long-term borrowings (non-current) | 166.4 | 171.6 |
Lease and other interest-bearing liabilities | 87.9 | 89.3 |
Total interest-bearing debt | 775.9 | 709.8 |
Short-term portion (borrowings + CP + current bonds) | 346.7 | 319.0 |
Long-term portion (bonds + LT borrowings) | 341.3 | 301.5 |
Trade receivables | 880.5 | 932.9 |
Inventories | 923.0 | 1,018.1 |
Trade payables | 473.8 | 487.7 |
Intangible assets (incl. goodwill) | 61.4 | 62.1 |
Goodwill amortisation in the year | 0.7 | 2.9 |
Cash Flow
| Metric | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|
Operating cash flow (JPY Bn) | 76.0 | 265.2 | 393.5 | 402.3 | 425.2 |
Capex, cash purchases of PP&E (JPY Bn) | 174.1 | 184.5 | 179.3 | 199.8 | 222.2 |
Free cash flow, OCF minus capex (JPY Bn) | -98.1 | 80.7 | 214.1 | 202.4 | 203.0 |
Capex, company definition (JPY Bn) | 189.7 | 208.3 | 193.8 | 243.3 | 243.2 |
Depreciation and amortisation (JPY Bn) | 180.5 | 196.0 | 206.3 | 206.2 | 209.8 |
Dividends declared for the year (JPY Bn) | 39.0 | 39.0 | 60.1 | 75.7 | 120.1 |
Share buybacks (JPY Bn) | 0 | 0 | 0 | 0 | 0 |
Key Financials — Investing cash flow
| Metric | FY2023 | FY2024 | FY2025 |
|---|---|---|---|
Investing cash flow (JPY Bn) | -123.8 | -223.9 | -174.9 |
Financing cash flow (JPY Bn) | -292.3 | -150.8 | -326.0 |
Company-defined FCF, OCF + ICF (JPY Bn) | 269.7 | 178.3 | 250.3 |
Returns & Leverage Ratios (%) and Financial Ratios (x)
| Metric | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|
ROE (%) | 5.7 | 6.1 | 7.3 | 8.6 | 14.7 |
ROA, net income / total assets (%) | 2.5 | 2.8 | 3.4 | 4.4 | 7.7 |
ROIC, pre-tax, company definition (%) | 5.8 | 6.6 | 7.6 | 9.3 | 14.7 |
Current ratio (x) | 1.6 | 1.5 | 1.7 | 1.8 | 1.8 |
Debt / owners' equity (x) | 0.49 | 0.51 | 0.36 | 0.34 | 0.26 |
Interest coverage, OP / interest expense (x) | 22.0 | 11.0 | 7.7 | 10.8 | 17.6 |
Asset turnover, sales / total assets (x) | 0.88 | 1.00 | 1.01 | 1.05 | 1.06 |
Financial Ratios (x)
| Metric | FY2023 | FY2024 | FY2025 |
|---|---|---|---|
Net debt / EBITDA (x) | 1.23 | 0.91 | 0.75 |
Working Capital (Days)
| Metric | FY2024 | FY2025 |
|---|---|---|
Days sales outstanding | 68.7 | 66.6 |
Days inventory outstanding | 88.7 | 91.2 |
Days payables outstanding | 45.5 | 43.7 |
Cash conversion cycle (days) | 111.9 | 114.1 |
Revenue by Region
| Region | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|
Japan (JPY Bn) | 1,403.3 | 1,497.3 | 1,664.8 | 1,775.2 | 1,901.2 |
Americas (JPY Bn) | 562.2 | 788.9 | 928.3 | 1,015.4 | 1,159.4 |
China (JPY Bn) | 598.3 | 630.3 | 615.1 | 617.9 | 640.7 |
Asia excluding China (JPY Bn) | 456.0 | 626.0 | 615.8 | 666.7 | 705.4 |
Europe and others (JPY Bn) | 348.0 | 463.1 | 578.7 | 604.6 | 703.4 |
Total (JPY Bn) | 3,367.9 | 4,005.6 | 4,402.8 | 4,679.8 | 5,110.2 |
Region Margins & Growth (%)
| Region | FY2023 | FY2024 | FY2025 |
|---|---|---|---|
Japan growth (%) | 11.2 | 6.6 | 7.1 |
Americas growth (%) | 17.7 | 9.4 | 14.2 |
China growth (%) | -2.4 | 0.5 | 3.7 |
Asia excl. China growth (%) | -1.6 | 8.3 | 5.8 |
Europe and others growth (%) | 25.0 | 4.5 | 16.3 |
Revenue by Region (%)
| Region | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|
Japan share (%) | 41.7 | 37.4 | 37.8 | 37.9 | 37.2 |
Americas share (%) | 16.7 | 19.7 | 21.1 | 21.7 | 22.7 |
China share (%) | 17.8 | 15.7 | 14.0 | 13.2 | 12.5 |
Asia excl. China share (%) | 13.5 | 15.6 | 14.0 | 14.2 | 13.8 |
Europe and others share (%) | 10.3 | 11.6 | 13.1 | 12.9 | 13.8 |
Share Price History
| Date | Price (JPY) | Note |
|---|---|---|
4 November 2025 | 1,515.5 | ¥6,062 before the split |
9 January 2026 | 1,529 | 2026 low |
17 February 2026 | 2,163 | ¥8,653 before the split |
14 April 2026 | 2,519 | ¥10,075 before the split; market capitalisation up 276% over one year at that date |
3 June 2026 | 3,712 | 2026 high |
24 July 2026 | 2,469 | After the split |
7 August 2026 | 2,129.5 | — |
6 October 2026 | 2,535.5 | — |
30 October 2026 | 1,770 | Results day, –5.35% |
4 November 2026 | 1,542.5 | –7.25% |
6 November 2026 | about 1,360 | AI sell-off after the US midterms |
Valuation Snapshot
| Multiple | Value |
|---|---|
Market capitalisation | about ¥4.24 trillion |
Enterprise value (net debt as of June 2026 plus minorities) | about ¥4.9 trillion |
P/E, FY2026E (EPS about ¥118.6) | about 11.5x |
P/E, trailing 12 months (EPS about ¥138, including the Densetsu gain) | about 9.9x |
EV/EBITDA, FY2026E (operating profit ¥500 billion plus D&A about ¥215 billion) | about 6.8x |
EV/Sales, FY2026E | about 0.85x |
P/B (owners' equity per share about ¥922 at September 2026) | about 1.5x |
Dividend yield, FY2026E (¥44) | about 3.2% |
Income Statement
| Item | FY2026 consensus (as of early November 2026) | Company guidance |
|---|---|---|
Net sales (JPY Bn) | 5,637.6 | 5,750.0 |
Operating profit (JPY Bn) | 504.0 | 500.0 |
Ordinary profit (JPY Bn) | 518.6 | 515.0 |
Net profit (JPY Bn) | 376.7 | 370.0 |
Per-Share Data and Returns & Leverage Ratios (%)
| Metric | FY2021 | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|---|
DPS, pre-split (JPY) | 50 | 50 | 77 | 97 | 154 |
DPS, split-adjusted (JPY) | 12.50 | 12.50 | 19.25 | 24.25 | 38.50 |
Payout ratio (%) | 40.5 | 34.6 | 40.1 | 39.0 | 32.5 |
Credit Ratings
| Agency | Long-term | Short-term |
|---|---|---|
Japan Credit Rating Agency (JCR) | AA | J-1+ |
Rating and Investment Information (R&I) | AA- | a-1+ |
Capital Instruments
| Instrument | Amount | Maturity character |
|---|---|---|
Short-term borrowings | 210.7 | Within one year |
Commercial paper | 63.3 | Within one year |
Bonds due within one year | 45.0 | FY2026 |
Bonds (non-current) | 129.9 | Beyond one year; domestic straight bonds |
Long-term borrowings | 171.6 | Beyond one year |
Lease and other liabilities | 89.3 | Mixed |
Total | 709.8 | About 45% short-term / 55% long-term |
Analyst Conclusions
Management guidance, FY2026 (revised 30 October 2026)
| Metric | FY2025 actual | FY2026 guidance (May) | FY2026 guidance (July) | FY2026 guidance (October) | H1 FY2026 actual | Implied H2 FY2026 |
|---|---|---|---|---|---|---|
| Net sales (JPY bn) | 5,110.2 | 5,300.0 | 5,400.0 | 5,750.0 | 2,764.9 | 2,985.1 |
| Operating profit (JPY bn) | 418.2 | 425.0 | 450.0 | 500.0 | 219.6 | 280.4 |
| Ordinary profit (JPY bn) | 431.3 | 432.0 | 460.0 | 515.0 | 231.2 | 283.8 |
| Net profit (JPY bn) | 369.5 | 320.0 | 340.0 | 370.0 | 159.4 | 210.6 |
| DPS, split-adjusted (JPY) | 38.5 | 39.0 | 39.0 | 44.0 | 19.0 | 25.0 |
Net sales (JPY bn): FY2025 actual: 5110.2; FY2026 guidance (May): 5300.0; FY2026 guidance (July): 5400.0; FY2026 guidance (October): 5750.0; H1 FY2026 actual: 2764.9; Implied H2 FY2026: 2985.1
Operating profit (JPY bn): FY2025 actual: 418.2; FY2026 guidance (May): 425.0; FY2026 guidance (July): 450.0; FY2026 guidance (October): 500.0; H1 FY2026 actual: 219.6; Implied H2 FY2026: 280.4
Ordinary profit (JPY bn): FY2025 actual: 431.3; FY2026 guidance (May): 432.0; FY2026 guidance (July): 460.0; FY2026 guidance (October): 515.0; H1 FY2026 actual: 231.2; Implied H2 FY2026: 283.8
Net profit (JPY bn): FY2025 actual: 369.5; FY2026 guidance (May): 320.0; FY2026 guidance (July): 340.0; FY2026 guidance (October): 370.0; H1 FY2026 actual: 159.4; Implied H2 FY2026: 210.6
DPS, split-adjusted (JPY): FY2025 actual: 38.5; FY2026 guidance (May): 39.0; FY2026 guidance (July): 39.0; FY2026 guidance (October): 44.0; H1 FY2026 actual: 19.0; Implied H2 FY2026: 25.0
Guidance is built on these assumptions: USD/JPY of about ¥151 and EUR/JPY of about ¥175 from the second quarter onward, copper at about ¥1.7 million per tonne, and a Middle East operating-profit drag of ¥23 billion for the full year. The implied second half shows operating profit up about 6% and sales up about 9% year on year, which looks conservative given that operating profit rose 43.5% in the first half.
Consensus expectations
Consensus sits slightly above company guidance on sales and net profit for FY2026. Mid-term Management Plan 2028 implies operating profit growth of about 10% a year from FY2026 to reach ¥600 billion in FY2028. If Infocommunications holds its guided ¥156 billion and Automotive recovers to about ¥180 billion, the FY2028 target looks attainable one year early.
Bull case
-
Optics earnings power is structural. Infocommunications operating profit is set to rise from ¥19.9 billion (FY2024) to ¥156 billion (FY2026E), at margins above 30%. It is backed by sold-out InP and ferrule capacity, three substrate price rises since Q4 2025 and long-term contracts through 2030.
-
Multiple compression has outrun fundamentals. At about 11.5 times FY2026E earnings and 6.8 times EV/EBITDA, the market is pricing an optics downturn even as guidance was raised twice in 2026 and net profit is heading for a record without one-off gains.
-
Energy and tungsten add uncorrelated growth. The HVDC backlog above €3 billion runs to 2032–2033, and Industrial Materials is set to earn ¥76 billion. Together these diversify profit away from both AI and automotive.
Bear case
-
AI capex is a cliff risk. Infocommunications is about 31% of FY2026E operating profit. A slowdown in hyperscaler spending, political limits on US data centres or new InP capacity from JX (7–10 times) and from China would erode the highest-margin profit pool.
-
Automotive is drifting lower. Segment operating profit is guided down 8% to ¥165 billion on Middle East logistics, copper lags and weak demand from Japanese brands in China, in the segment that makes up 57% of sales.
-
One-offs and FX flatter the numbers. FY2025 net profit included a ¥79.2 billion gain, and the yen at about ¥160 per dollar in Q1 FY2026 added ¥9 billion to quarterly operating profit. A stronger yen and the end of the tungsten pull-forward could cut earnings below guidance in FY2027.
Key catalysts and monitorables (next 12 months)
| Expected timing | Catalyst / monitorable | Why it matters |
|---|---|---|
| Early February 2027 | Q3 FY2026 results | Whether Infocommunications growth holds after the AI sell-off; possible third guidance upgrade |
| Throughout FY2026 | Hyperscaler capex commentary and US data-centre policy after the midterms | Main driver of the optics multiple |
| Throughout FY2026 | Progress on the InP 3.1× and MT-ferrule 7× expansions | Ability to turn shortage pricing into volume |
| May 2027 | FY2026 results and FY2027 guidance; first progress check on Mid-term Management Plan 2028 | Tests whether ¥600 billion of operating profit can be reached early |
| June 2027 | AGM: board composition and any succession announcement | Governance renewal question |
| Ongoing | Chinese tungsten export-control developments | Durability of Industrial Materials profit |
| Ongoing | Execution of DC35 and Korridor B, and progress on the UK subsea plant | Energy margin and backlog conversion |
| Ongoing | Copper price and USD/JPY | Automotive margin recovery and FX sensitivity |
| Ongoing | Middle East logistics normalisation | Recovery of the ¥23 billion headwind |
Early February 2027: Catalyst / monitorable: Q3 FY2026 results; Why it matters: Whether Infocommunications growth holds after the AI sell-off; possible third guidance upgrade
Throughout FY2026: Catalyst / monitorable: Hyperscaler capex commentary and US data-centre policy after the midterms; Why it matters: Main driver of the optics multiple
Throughout FY2026: Catalyst / monitorable: Progress on the InP 3.1× and MT-ferrule 7× expansions; Why it matters: Ability to turn shortage pricing into volume
May 2027: Catalyst / monitorable: FY2026 results and FY2027 guidance; first progress check on Mid-term Management Plan 2028; Why it matters: Tests whether ¥600 billion of operating profit can be reached early
June 2027: Catalyst / monitorable: AGM: board composition and any succession announcement; Why it matters: Governance renewal question
Ongoing: Catalyst / monitorable: Chinese tungsten export-control developments; Why it matters: Durability of Industrial Materials profit
Ongoing: Catalyst / monitorable: Execution of DC35 and Korridor B, and progress on the UK subsea plant; Why it matters: Energy margin and backlog conversion
Ongoing: Catalyst / monitorable: Copper price and USD/JPY; Why it matters: Automotive margin recovery and FX sensitivity
Ongoing: Catalyst / monitorable: Middle East logistics normalisation; Why it matters: Recovery of the ¥23 billion headwind
Analyst verdict
Sumitomo Electric Industries has become a materially better company over the past three years, and the numbers support it. Operating margin has more than doubled from 3.6% to 8.2%, pre-tax ROIC has risen from 5.8% to 14.7%, net debt has fallen below one turn of EBITDA, and FY2026 guidance points to a fourth consecutive record with operating profit of ¥500 billion. The improvement is not a single-product story. AI optics is the most visible driver, but energy (an HVDC backlog above €3 billion), industrial materials (tungsten scarcity) and portfolio clean-up (the Sumitomo Riko buy-in and the Sumitomo Densetsu exit) have each added to returns.
The market's problem is not the trajectory but its composition. In the first quarter of FY2026, Infocommunications overtook Automotive as the largest profit contributor despite being one-ninth of its size by sales. That concentration made SEI an AI proxy. The shares rose about 140% from January to June 2026 and then gave back almost two-thirds by early November as global AI stocks were de-rated. The sell-off has priced the stock as though optics profit will fade. Meanwhile management has raised guidance twice, and the physical bottlenecks SEI controls — InP crystal growth, precision MT ferrules and 525 kV HVDC cable — cannot be duplicated quickly.
The balance of evidence favours a constructive view on fundamentals, with three caveats. First, Automotive must stabilise. A segment carrying 57% of sales cannot keep losing margin to copper lags and logistics shocks without capping group returns. Second, SEI must convert its ¥1 trillion capex plan into returns above its cost of capital while bringing its 114-day cash conversion cycle down. Third, leadership succession, with a Chairman aged 82 and a President in office since 2017, needs a credible answer before FY2028.
On balance, SEI now offers a diversified infrastructure earnings base at roughly 11–12 times forward earnings and a dividend yield above 3%, with AI optics as upside rather than the whole thesis. The key swing factor over the next twelve months is whether hyperscaler optical demand holds through the 2027 budgeting cycle. If it does, the FY2028 targets are likely to be met a year early. If it does not, the energy and tungsten businesses and the balance sheet provide a floor that pure-play optics peers lack.
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View Subscription PlansExecutive Leadership
Board of Directors
| Name | Position | Board / executive tenure | Background | Birth year / education |
|---|---|---|---|---|
Masayoshi Matsumoto | Chairman of the Board (Chairman & CEO) | Joined 1967; director 1997; President 2004–2017; Chairman since June 2017 | Lifelong SEI executive; also Chairman of the Kansai Economic Federation | Born 1944 |
Osamu Inoue | President (Representative Director; President & COO) | Joined April 1975; Executive Officer 2004; Managing Director 2008; President of Sumitomo Wiring Systems 2012–2017; SEI President since June 2017 | Automotive specialist; ran subsidiaries in the US, Indonesia and Germany | Born 1952; Kyushu University, Faculty of Economics |
Hideo Hato | Executive Vice President (Representative Director) | Director since 2018 | Former senior official of the Ministry of Economy, Trade and Industry | — |
Masaki Shirayama | Senior Managing Director | Long-time head of the power-cable and energy businesses | Led the Südkabel deal and the Amprion HVDC contracts | Born 1961 |
Yasuhiro Miyata | Managing Director | Director since 2021 | Former General Manager, Electronics Sales Unit | Born 1961 |
Toshiyuki Sahashi | Managing Director | Director since 2021 | Advanced Materials | — |
Yoshiyuki Ogata | Managing Director | Director since June 2024 | Former Deputy General Manager, Automotive Business Unit | — |
Hiroshi Hayami | Managing Director | Director since June 2025 | R&D Unit | — |
Hisashi Togawa | Managing Director | Director since June 2025 | Manufacturing Technology Unit; New Business Development | — |
Hiroshi Sato | Outside Director | — | Former President, Kobe Steel | — |
Michihiro Tsuchiya | Outside Director | — | Former President, Mitsubishi Tanabe Pharma | — |
Atsushi Horiba | Outside Director | Since 2021 | Chairman & Group CEO, HORIBA, Ltd. | — |
Kyoko Kawamata | Outside Director | Since June 2024 | Former executive, Mainichi Newspapers | — |
Asli M. Colpan | Outside Director | Since June 2025 | Professor, Kyoto University; specialist in corporate governance and business groups | — |
Executive Leadership Team
| Director | Role | Fixed pay | Performance-linked pay | Total FY2025 | Total FY2024 | Total FY2023 |
|---|---|---|---|---|---|---|
Masayoshi Matsumoto | Chairman | 151,050 | 158,100 | 309,150 | 261,100 | 216,000 |
Osamu Inoue | President | 136,950 | 96,000 | 232,950 | 201,400 | 171,000 |
Hideo Hato | Executive Vice President | 78,750 | 60,100 | 138,850 | 111,750 | not above ¥100 million |
Masaki Shirayama | Managing Director | 49,800 | 65,500 | 115,300 | not above ¥100 million | not above ¥100 million |
Yasuhiro Miyata | Managing Director | 49,350 | 63,200 | 112,550 | not above ¥100 million | not above ¥100 million |
Board & Management Changes
| Date | Change | Context |
|---|---|---|
June 2024 | EVP Mitsuo Nishida retires; Yoshiyuki Ogata and Kyoko Kawamata join the board | Generational renewal in automotive |
June 2025 | Senior MD Akira Nishimura (R&D) leaves the board to become President of Nissin Electric; Shigeru Nakajima retires; outside director Christina Ahmadjian leaves; Hiroshi Hayami, Hisashi Togawa and Asli Colpan join | R&D leadership renewed; board diversity kept |
May 2026 | Several executive officer promotions; Yuji Morita nominated to the Audit & Supervisory Board | Alongside the launch of Mid-term Management Plan 2028 |
June 2026 | All 14 directors re-elected at the 156th AGM | No change at the top |
Major Shareholders
| Shareholder | Shares held (thousand) | % of shares outstanding |
|---|---|---|
The Master Trust Bank of Japan (trust account) | 125,482 | 16.09 |
Custody Bank of Japan (trust account) | 71,336 | 9.14 |
Nippon Life Insurance | 21,041 | 2.70 |
Sumitomo Life Insurance | 15,906 | 2.04 |
State Street Bank and Trust Company 505001 | 15,682 | 2.01 |
Government of Norway | 12,504 | 1.60 |
Sumitomo Electric Employee Shareholding Association | 10,225 | 1.31 |
Competitive Landscape
Competitors by Segment
| Segment | Principal competitors | SEI's relative position |
|---|---|---|
Automotive wiring harnesses | Yazaki (Japan, private), Aptiv (US/Ireland), Lear E-Systems (US), Leoni (Germany), Furukawa Electric / Furukawa AS (Japan), Motherson (India), Kromberg & Schubert (Germany), Kyungshin (Korea; also an SEI affiliate) | Global top two with Yazaki; strongest with Japanese OEMs and in North America and ASEAN |
Anti-vibration rubber and hoses | Vibracoustic (Germany), Toyo Tire, Bridgestone, Continental/ContiTech | Sumitomo Riko is a global leader |
Power cable / HVDC | Prysmian (Italy), Nexans (France), NKT (Denmark), LS Cable & System (Korea), Hengtong and ZTT (China), Furukawa Electric | Fourth force in European HVDC behind Prysmian, Nexans and NKT; strong in Japan |
Optical fibre and cable | Corning (US), Prysmian, Fujikura (Japan), Furukawa/OFS, YOFC, Hengtong, FiberHome, ZTT (China) | Premium specialist (ultra-low-loss, multi-core); Chinese makers dominate commodity fibre, with about 62% of global preform capacity |
Data-centre optical devices and connectivity | Lumentum, Coherent, Broadcom (US); Fujikura (connectivity); US Conec (MT ferrules) | Leading InP laser and photodiode chips and MT ferrules; not a module maker |
Compound semiconductor substrates | JX Advanced Metals (Japan; InP), AXT/Tongmei (US/China; InP and GaAs), Freiberger Compound Materials (Germany; GaAs), Chinese domestic InP producers | About 40% InP share alongside JX's ~40%; leading GaAs supplier |
Carbide tools and tungsten | Sandvik Coromant (Sweden), Kennametal (US), IMC/Iscar (Israel), Mitsubishi Materials, Kyocera (Japan) | Top-tier Japanese tool maker with captive tungsten (A.L.M.T.) |
FPC and electronic wire | Nippon Mektron (NOK), Zhen Ding, Career Technology; Proterial (electronic wire) | Mid-tier FPC; strong in fine coaxial cable |
Peer Comparison FY2026
| Company | Fiscal year | Revenue | Revenue growth | Operating / EBITDA margin | Net profit |
|---|---|---|---|---|---|
Sumitomo Electric Industries | FY ended March 2026 | ¥5,110.2 billion | +9.2% | Operating 8.2%; EBITDA 12.3% | ¥369.5 billion |
Fujikura | FY ended March 2026 | ¥1,182.4 billion | +20.7% | Operating 16.0% | ¥157.2 billion |
Furukawa Electric | FY ended March 2026 | ¥1,307.6 billion | +8.8% | Operating 4.9% | ¥72.5 billion |
Prysmian | FY ended December 2025 | €19.7 billion | +15.4% | Adjusted EBITDA 11.9% (14.2% at standard metal prices) | €1.27 billion |
