Plexus recovery is real, cash is the test
- In Q2 fiscal 2026, Industrial revenue grew 20.6% year over year after falling 3.7% in Q1.
- All three market sectors grew at double-digit rates in Q2 fiscal 2026.
- Operating margin reached 5.3% in Q2 fiscal 2026, showing better profit flow as sales rose.
- Cash conversion is the main worry, with first-half operating cash flow at $13.1 million versus $90.3 million a year earlier.
- The top 10 customers made up 49.1% of fiscal 2025 net sales, so customer losses can matter fast.
Growth came back, cash has not
Plexus now looks much healthier than it did after Q1. The weak spot then was Industrial, which had shrunk 3.7% year over year. In Q2 fiscal 2026, that same sector grew 20.6%. Aerospace/Defense grew 23.0%, and Healthcare/Life Sciences grew 15.1%. That makes the recovery broad, not narrow.
Profit also improved. Operating margin reached 5.3% in Q2 fiscal 2026. That matters because Plexus is a services and manufacturing partner, so small margin gains can add up when revenue is rising across several end markets.
The main question has moved from demand to cash. Operating cash flow was only $13.1 million for the first six months of fiscal 2026, down from $90.3 million in the prior year period. Management tied this to a $170.7 million inventory increase for program ramps. If that inventory turns into shipments, the bull case gets stronger. If it sits too long, profit may not turn into free cash flow.
Finn's overall view is balanced. The business is improving, but the score is not a victory lap. The stock still needs proof that growth can last, margins can hold near Q2 levels, and cash flow can catch up.
Complex products for picky customers
Plexus does not sell its own branded products. It helps other companies design, source parts for, launch, build, and support complex electronics. Its customers are in markets where mistakes can be costly, such as medical devices, defense systems, industrial automation, and semiconductor equipment.
The company works in two main ways. In a turnkey job, Plexus buys the parts and delivers the finished product. In a consignment job, the customer supplies some or all of the parts. Turnkey work can create more revenue, but it also ties up cash in inventory.
The strategy is not to chase the highest volume consumer gadgets. Plexus aims for harder, lower-volume products with strict rules and long customer relationships. Its financial goal is a 15% return on invested capital, meaning profit compared with the money tied up in plants, inventory, and other assets.
That model breaks when demand shifts quickly or parts are hard to get. It also breaks if customers do not give long-term purchase commitments, because Plexus may still need to hire people and buy materials before orders fully arrive.
Services, not house brands
Design & Development
Plexus helps customers turn ideas into manufacturable products. This can pull the company into programs earlier and make later production work more likely.
Supply Chain Solutions
The company sources parts and manages suppliers for complex products. This is useful for customers, but it can consume cash when inventory rises ahead of sales.
New Product Introduction
Plexus helps move new products from prototype to production. Recent revenue growth includes production ramps for new customers and new products.
Manufacturing
Manufacturing is the core work: building complex products for regulated markets. Scale and good factory use can help margins when demand improves.
Sustaining Services
Plexus supports products after launch, helping keep them in the market longer. This can be steadier than one-time launch work.
Three markets now growing
Mix is based on Q2 fiscal 2026 net sales by market sector. Plexus reports formal segments by geography, but manages its market strategy around Industrial, Healthcare/Life Sciences, and Aerospace/Defense.
What could still go wrong
Inventory does not turn into cash
High impact · Medium oddsThe biggest near-term risk is working capital. First-half fiscal 2026 operating cash flow was $13.1 million, far below $90.3 million in the prior year period. Management said inventory rose by $170.7 million to support program ramps. If those ramps slip, cash flow could stay weak even while reported profit looks good.
Industrial growth fades again
Medium impact · Medium oddsIndustrial was the key swing factor. It moved from a 3.7% decline in Q1 fiscal 2026 to 20.6% growth in Q2 fiscal 2026. Some of that growth came from new customer and product ramps. If those were one-time boosts or easy comparisons, the recovery could look less broad later.
Customer concentration cuts both ways
High impact · Medium oddsThe top 10 customers were 49.1% of fiscal 2025 net sales. Plexus also says customers generally do not give long-term purchase commitments. A lost program, delayed order, or customer inventory correction can hit factories and margins quickly.
Global minimum tax lowers earnings power
Medium impact · High oddsPlexus has benefited from tax holidays, including in Malaysia. Management warned that global minimum tax rules are expected to materially and unfavorably affect those benefits and the effective tax rate. For fiscal 2026, the company expected an annual effective tax rate of about 16.0% to 18.0%, assuming no tax law changes.
Regulated products raise the cost of mistakes
Medium impact · Low oddsPlexus serves Healthcare/Life Sciences and Aerospace/Defense customers, where product quality and rules matter a lot. A manufacturing defect, audit issue, or compliance failure could damage customer trust and delay production. These markets can be attractive, but the bar is high.
In one breath
What does Plexus Corp. do?
Plexus helps other companies design, source, launch, manufacture, and support complex electronics. It focuses on regulated and high-complexity markets such as Industrial, Healthcare/Life Sciences, and Aerospace/Defense.
Does Plexus sell its own products?
No. Plexus is mainly a product lifecycle and manufacturing partner. Its value comes from helping customers build difficult products, not from selling a Plexus-branded device.
Why is cash flow the key issue for PLXS?
Revenue and margins improved in Q2 fiscal 2026, but operating cash flow for the first half was only $13.1 million. The company built inventory for program ramps, so investors need to see that inventory convert into shipments and cash.
What are Plexus's main end markets?
In Q2 fiscal 2026, Industrial was 41.1% of sales, Healthcare/Life Sciences was 40.6%, and Aerospace/Defense was 18.2%. All three grew at double-digit rates that quarter.