Business Overview: Sanmina Corporation (NASDAQ: SANM)

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Executive Summary

Sanmina Corporation is a leading global provider of integrated manufacturing solutions, serving original equipment manufacturers (OEMs) across industrial, medical, defense and aerospace, automotive, communications networks, and cloud and AI infrastructure markets. Sanmina generated $8.13 billion in net sales in fiscal 2025 (ended September 27, 2025), up 7.4% from fiscal 2024, with net income attributable to common shareholders of $245.9 million.

The company's business spans the full electronics manufacturing value chain — design and engineering, component manufacturing, high-level system assembly and test, order fulfillment, and after-market repair and logistics services — operating through long-term supply agreements with major OEM customers rather than simple transactional contract manufacturing.

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1. Core Business Model & How They Work

Sanmina acts as an outsourced manufacturing and supply chain partner, taking on the engineering, component sourcing, assembly, testing, and fulfillment work that OEMs choose not to perform in-house.

[ OEM Customer Design/Need ] ➡️ [ Joint/Contract Design Manufacturing ] ➡️ [ Component Mfg (PCBs, Cables, Metal/Plastic Parts) ] ➡️ [ System Assembly & Test ] ➡️ [ Order Fulfillment / After-Market Service ]

Key Operating Drivers

1. Long-term supply agreements: Three-to-five-year agreements with major OEMs, generally without minimum purchase quantities, but with customers typically liable for materials and components ordered under an agreed procurement plan but not used — managing Sanmina's inventory risk.
2. Engagement model flexibility: Joint design manufacturing (JDM), contract design manufacturing (CDM), and consulting engineering let Sanmina participate anywhere from pure manufacturing to deep co-design relationships with customers.
3. Vertical integration into components: Beyond assembly, Sanmina manufactures its own advanced PCBs, backplanes, cable assemblies, and precision metal/plastic parts — capturing more value per product than a pure assembler.
4. Customer concentration management: The ten largest customers represented 52% of fiscal 2025 net sales, with the single largest customer at 10.1% — a meaningful but not overwhelming concentration, reduced from 13.2% for the largest customer in fiscal 2023.

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2. Business Segments

┌─────────────────────────────────────────┐
│             Sanmina Corporation             │
└────────────────────┬────────────────────┘
                      │
     ┌────────────────┴────────────────┐
     ▼                                  ▼
┌───────────────────────┐      ┌─────────────────────────┐
│ Integrated Manufacturing   │      │  Components, Products &     │
│ Solutions (IMS)             │      │  Services (CPS)              │
│ PCB/system assembly & test,│      │  Advanced PCBs, backplanes,  │
│ direct order fulfillment    │      │  cable assemblies, metal/     │
│ ~80% of FY2025 revenue      │      │  plastic parts, 42Q software  │
│                             │      │  ~20% of FY2025 revenue       │
└───────────────────────┘      └─────────────────────────┘

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3. Product Portfolio

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4. Competitive Landscape

• Domestic and foreign electronics manufacturing services (EMS) providers: Direct peers competing on manufacturing technology, quality, global footprint, delivery speed, and price.
• Diversified manufacturing service providers: Companies offering broader industrial manufacturing beyond pure electronics.
• Design providers: Firms competing specifically on the JDM/CDM co-design engagement model rather than pure assembly.
• In-house manufacturing by customers: Some OEMs retain or build internal manufacturing capability, representing a persistent alternative to outsourcing.

Sanmina competes on manufacturing technology and quality, global/regional footprint (with facilities needed close to end markets for logistics and tariff reasons), delivery responsiveness, value-added engineering solutions, and price.

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5. Strategic Strengths & Risks

Strengths

• Full value-chain integration: Owning component manufacturing (PCBs, cables, metal/plastic parts) alongside system assembly differentiates Sanmina from pure-play assemblers and captures more margin per unit.
• Diversified end markets: Exposure across industrial, medical, defense/aerospace, automotive, communications, and cloud/AI infrastructure reduces dependence on any single industry's cycle.
• Growing cloud/AI infrastructure exposure: Positioning in cloud and AI infrastructure manufacturing taps into one of the fastest-growing segments of electronics demand.
• Reduced customer concentration over time: The largest customer's share of sales fell from 13.2% (FY2023) to 10.1% (FY2025), reducing single-customer risk.
• Long operating tenure and scale: Average employee tenure of about eight years and roughly 39,000 employees across 20 countries reflect accumulated process knowledge and global reach that is costly for a new entrant to replicate.

Risks

• Customer concentration remains material: The top ten customers still represent 52% of net sales; losing even one major account would be financially significant.
• Thin-margin, asset-intensive business model: Contract manufacturing is inherently a lower-margin business than product companies, requiring continuous volume and efficiency gains to sustain returns.
• Macro and end-market cyclicality: Demand across industrial, automotive, and communications end markets is sensitive to broader economic cycles and capital spending patterns.
• Geopolitical and tariff exposure: A global manufacturing footprint exposes Sanmina to tariff changes, trade policy shifts, and regional supply chain disruptions; customers bear some but not all of this risk per contract terms.
• Competitive intensity: The EMS industry includes several large, well-capitalized global competitors, limiting pricing power and requiring continuous investment in capacity and capability.

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6. Financial Overview

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7. Summary Conclusion

Sanmina has built a durable position in electronics contract manufacturing by vertically integrating component production with system assembly and fulfillment, giving it more control over quality, cost, and margin than a pure assembly house. Fiscal 2025's 7.4% revenue growth and double-digit earnings growth, alongside a declining largest-customer concentration, suggest the diversification strategy across industrial, medical, defense/aerospace, automotive, and cloud/AI infrastructure markets is working. The structural challenge remains that EMS is an inherently thin-margin, highly competitive business where scale, efficiency, and customer relationships matter more than any single technological moat — making continued diversification into higher-value segments like cloud/AI infrastructure and defense/aerospace the clearest path to margin expansion over time.

Sources: Sanmina Corporation 10-K FY2025, SEC EDGAR, Sanmina Reports Fourth Quarter and Fiscal 2025 Financial Results, PR Newswire