Plexus Posts Its Best Quarter Ever — and the Tape Says It Doesn't Believe a Word
Record $1.43B quarter, a new 6.5–7.0% margin goal, a $4.9B funnel… against a 28% drawdown and a semi-cap complex that is being marked down, not up
PLXS · Earnings Call · 2026-10-29
The quarter that broke nothing but the stock
On the numbers, Plexus just had the best quarter in its history. Fiscal Q4 revenue of $1.43 billion rose 35% year over year, non-GAAP operating margin of 6.7% expanded nearly 100 basis points, and non-GAAP EPS of $2.84 cleared the top of guidance. Full-year revenue reached roughly $5 billion, up 23%. The win performance was equally loud: $290 million of annualized Q4 wins, nearly $1.2 billion for the year, and a funnel that grew 33% to a record $4.9 billion. As the CEO put it, “Our wins performance remained strong, while our funnel of qualified manufacturing opportunities reached another record level, expanding $1.2 billion year over year to nearly $5 billion” — Todd Kelsey, CEO · 2026-10-29.
And the stock is down 24.5% over the last 90 trading days, sitting 28.8% below its June 22 peak of $303.82. That gap is the story. It isn't a Plexus problem — it's a basket problem. The global tape shows the semi cap equipment cluster (PLXS, JBL, COHR) down 6.4% over 90 days, design win activity down 10.3%, high bandwidth memory down 6.9%, and the sprawling AI data center complex down 5.3% with 49 of 56 names negative. The market is de-rating the exact subsector where Plexus just grew 50%.
So the re-rating had to come from the multiple, not the earnings. Price to revenue sits at 1.75x, against a decade that mostly lived between 0.6x and 1.0x — a valuation that doubled in two years and is now unwinding. When a stock triples and then falls 29% while the P&L keeps beating, you are watching the market re-price cyclicality, not execution.
The margin goal: the cheapest sentence in the deck
Buried under the revenue headline is the genuinely new item. Having cleared its long-standing "6.0% or above" target, Plexus graduated to a new one:
Having consistently exceeded our previous 6% goal, we are introducing a new non GAAP operating margin goal, of 6.5% to 7.0%.
That is not a surprise — it is a promise kept. On the October 2025 call, Pat Jermain told Steve Barger, “I could see us sitting here a year from now reevaluating that margin target” — Patrick Jermain, Unknown · 2025-10-23. He was right on schedule. The margin goal and continuous improvement culture are the freshest high-conviction themes in the transcript, and they are being funded by real operational math: equipment efficiency up more than 10% and revenue per team member up roughly 20% over two years, machine utilization up 12%, and revenue per employee up 25% between Q4 of fiscal 2024 and Q4 of fiscal 2026.
What makes it credible rather than promotional is capital efficiency — a record 62-day cash cycle, ROIC of 15.8% (680 basis points above cost of capital, the best in nearly a decade), and capex held to 2–3% of revenue. The one caveat management volunteered is the honest one: flow-through lands at the low end of the 8–12% target because they are spending ahead of the revenue.
Three things that actually changed
Healthcare turned a corner. Three months ago the message was digestion. “Typically, when you launch new products, there's a little bit of a digestion period, and we'll see that in fiscal 2027” — Shawn Harrison · 2026-07-30, Shawn Harrison said in July. The new healthcare life sciences market sector guide is high single digits, above a mid-single-digit market, with three new customers won and — the tell — a marked Q4 uptick in the engineering funnel, which Oliver Mihm calls a leading indicator.
European defense spending stopped being a headline and started being an order. In January, Mihm was explicit that “the implied spending from news headlines has not trickled through in any substantial way for us here yet” — Oliver Mihm, Senior Executive / Market Sector Leader · 2026-01-29. On Thursday it was "a bit of both" — real defense spending plus new primes, with the EU still called early-days upside. Fiscal 2026 Space subsectors and defense wins hit $490 million, more than the prior three years combined.
Semi-cap refuses to behave cyclically. Revenue in the subsector rose 50% in fiscal 2026, and the calendar-year growth rate is guided higher still. Todd Kelsey: “we took a significant amount of share particularly through the last downturn within the semi cap market” — Todd Kelsey, CEO · 2026-10-29 — and, unusually, is still taking share into the upcycle. But he drew a hard line on visibility: “I would say we have reasonable visibility for the next year or so” — Todd Kelsey, CEO · 2026-10-29, explicitly declining to project to 2029–2030 the way a competitor did. That is the right kind of refusal.
What went quiet — and it matters
Capacity talk has evaporated. A quarter ago Kelsey was telling analysts “we'll be adding additional capacity to our new site in Penang, Malaysia” — Todd Kelsey · 2026-07-30 and that the existing footprint could support roughly $6 billion of revenue. With revenue near $5 billion and mid-to-upper-teens growth ahead, that headroom is nearly spent — yet the topic has been replaced by "investments in people and technology" and the growth technology narrative. Watch for footprint additions to reappear as a capex story.
Two other silences. Customer concentration rose from 49% to 56% of revenue, and Kelsey waved it away — “I would say in general, Steve, the answer is no” — Todd Kelsey, CEO · 2026-10-29. And commercial aerospace, the recurring optionality management has dangled for at least four straight calls, remains outside guidance: “We are still taking a conservative approach on when that happens and to what level it happens” — Todd Kelsey, CEO · 2026-10-29. That is disciplined — but it is also the fourth quarter in a row of the same free option.
Finally, the cash. Guidance promises more than $100 million of free cash flow for fiscal 2027, but Q1 is a use of cash, and the last filed quarter showed capex doubling to $27 million against free cash flow of negative $22 million — a 7-point swing in free cash flow margin while revenue grew 28%. Effective net cash stands at $93 million, far below the 2017 peak of $340 million. Growth here is financed with inventory and receivables; the record cash cycle is the flex that makes it work.
The bull case is that Plexus is taking share in three simultaneous upcycles with a freshly raised margin floor. The bear case is that the market has decided semi-cap is a cycle again, and Plexus's 1.75x revenue multiple never deserved to be a compounder's. This report does nothing to resolve that argument — it just makes it louder.