The contract manufacturer's customer-concentration risk

Most contract manufacturers have a number they don't like to say out loud: the share of revenue that comes from their top two or three customers. When that number is high, those customers own your pricing, your capacity planning, and your future.

Why concentration is the core risk

A customer who knows they're 40% of your revenue negotiates like it. You can't hold price, can't walk away from a bad term, and a single customer's down quarter — or decision to reshore, or to dual-source — becomes an existential event. Concentration also quietly caps margin: the big accounts extract volume discounts precisely because losing them is unthinkable.

What resilient contract manufacturers do

1. Treat diversification as the primary risk control — a deliberate goal to bring the top-customer share down, not a someday wish.
2. Build a continuous new-account pipeline of OEMs and brands that fit their capability — defined by part type, volume band, materials, and certifications.
3. Sell capability and reliability, not just price — on-time delivery, quality systems, engineering support — so they're not interchangeable.
4. Get in early, before a program is competitively bid, through relationships built continuously with OEM sourcing and engineering teams.

The pipeline discipline

The reason concentration persists is that business development is reactive — quoting whatever RFQs arrive, usually from existing customers. That structurally locks the shop into its current base.

Escaping it means a consistent outbound motion toward a defined set of target OEMs — relationship-building with the people who control programs, run as an ongoing operating habit. Whether that's a sales role or tooling that systematizes the cadence, the lesson is the same as staffing, freight, and CRE: pricing power and stability come from optionality, and optionality comes from a pipeline you build before you need it.

The takeaway

Customer concentration is the contract manufacturer's defining risk. Diversify deliberately, build a continuous pipeline of fit OEM accounts, and sell capability — so no single customer owns your pricing or your future.