Cisco Q4 2026 Earnings: AI Orders Surge, Stock Falls

Cisco Systems closed its fiscal year with the strongest quarter in company history and a wave of artificial-intelligence orders large enough to reframe how investors think about the 40-year-old networking vendor. On August 13, 2026, Cisco reported fourth-quarter revenue of $17.3 billion, up 18% year over year, and full-year fiscal 2026 revenue of $63.3 billion, up 12%. Non-GAAP earnings per share came in at $1.22, ahead of Wall Street estimates and the company’s fifth consecutive quarterly beat.

Then the stock fell.

Shares slid in after-hours trading despite the record print, a reaction that says less about the quarter Cisco delivered than about the expectations the AI trade has loaded onto it. The results and the sell-off together make Cisco a useful gauge of where the market’s patience with AI-infrastructure names now sits.

The headline numbers

The top line was unambiguously strong. Product revenue rose 24%, the segment that captures switches, routers, servers, and the silicon Cisco sells into data centers — the part of the business most directly exposed to the AI buildout. Full-year revenue of $63.3 billion marks a return to double-digit growth for a company that spent much of the prior decade in the low single digits, and the $17.3 billion quarter is the highest Cisco has ever recorded.

Profitability kept pace with the top line. Non-GAAP EPS of $1.22 beat consensus and extended a streak of estimate-beating quarters that stretches back through fiscal 2026. For a mature hardware franchise, the combination of accelerating revenue and expanding earnings is the kind of setup that usually rewards shareholders. That it did not is the tension at the center of this report.

AI orders are the story

The number that mattered most was not on the income statement. Across fiscal 2026, Cisco booked $9.3 billion in AI infrastructure orders, including $4.0 billion in the fourth quarter alone. That order flow — hardware and systems that hyperscalers and large enterprises have committed to buy but that Cisco has not yet fully recognized as revenue — is the clearest evidence yet that the networking layer of the AI stack is entering its own demand cycle.

The logic is straightforward. Training and serving large models requires binding together tens of thousands of GPUs into a single fabric, and those GPUs are useless if the network between them cannot move data fast enough to keep them fed. As accelerator clusters scale, the switches, optics, and interconnects that stitch them together scale with them. Cisco’s pitch to investors is that it sells the plumbing for exactly this problem, and the $9.3 billion order book is the company’s answer to anyone who assumed the AI windfall would accrue only to chipmakers.

Management guided that AI infrastructure revenue could reach $7.5 billion in fiscal 2027, converting a large share of the fiscal 2026 order book into recognized sales over the coming year. That trajectory places Cisco alongside the memory and equipment suppliers that have ridden the same wave — a broadening of the AI beneficiary list well beyond the hyperscaler capital-expenditure budgets that dominated earnings season.

Why the stock fell

If the quarter was this good, why did the stock drop? The answer lives in the gap between results and expectations. After a run that pushed Cisco shares toward multi-year highs, the bar for the print was elevated, and investors used the report to interrogate two things the headline numbers do not settle: margins and valuation.

The AI order surge is real, but AI infrastructure hardware tends to carry lower gross margins than Cisco’s traditional enterprise networking and its fast-growing software and subscription business. A revenue mix tilting toward large, competitively bid data-center systems can dilute the blended margin even as it lifts the top line — a dynamic that has pressured other hardware names riding the same cycle. With the stock priced for the growth, any hint that the incremental dollar of AI revenue is a lower-quality dollar was enough to prompt profit-taking.

The second concern is simply price. A networking incumbent trading at a growth multiple has little room for error, and a beat-and-slide is the market’s way of saying the good news was already in the stock. None of this contradicts the strength of the quarter; it reflects how much optimism the shares had absorbed heading in.

The broader networking trade

Cisco’s report did not land in isolation. The same session saw AI-exposed hardware and memory names move sharply — Dell Technologies advanced close to 10% and Micron Technology rose nearly 5% — as investors continued to rotate toward the companies supplying the physical layer of AI. The read-through is that the buildout is no longer a story about a single chip vendor. It is a supply chain, and the economics of AI data centers reward every link in it: accelerators, high-bandwidth memory, servers, storage, and the networking fabric Cisco specializes in.

That breadth is also what makes the group volatile. When expectations run ahead of even record results — as they did for Cisco, and as they have for peers reporting into the same enthusiasm — the market’s response can decouple from the fundamentals of any single quarter. Cisco’s beat-and-fall pattern echoes reactions seen across the sector this year, where strong prints from AI-levered names were met with scrutiny rather than celebration.

Guidance and what comes next

Cisco’s outlook pointed higher. For the first quarter of fiscal 2027, the company guided to non-GAAP EPS of $1.32 to $1.34, a sequential and year-over-year step up from the $1.22 it just delivered. Paired with the $7.5 billion AI infrastructure revenue target for the full year, the guidance frames fiscal 2027 as the year Cisco expects to convert its order book into reported growth.

The company’s challenge is execution and mix. Turning $9.3 billion of orders into revenue at acceptable margins, while defending its position against merchant-silicon switching and white-box competitors chasing the same data-center dollars, is the work of the coming year. The order book removes doubt about demand; it does not resolve the question of how profitable that demand will be.

What it means

Cisco’s quarter is a clean illustration of where the AI trade stands in the back half of 2026: the demand is real, it is broadening beyond the obvious winners, and the market has already priced a great deal of it.

The order book is the signal, the stock drop is the noise. A $9.3 billion AI infrastructure order tally, with $4 billion booked in a single quarter, is hard evidence that networking is a first-class beneficiary of the buildout and not an afterthought. The after-hours slide reflects positioning and valuation, not a deterioration in the business. Investors who conflate the two are reading the tape, not the company.

Margins are the number to watch next. The bear case is not that AI revenue fails to arrive — it plainly is arriving — but that it arrives at a lower margin than the software and subscription mix Cisco has spent years cultivating. Whether the AI order book lifts or dilutes blended profitability will determine how the market ultimately values this growth. Cisco’s fiscal 2027 results, alongside the record AWS and cloud prints from the hyperscalers driving the orders, will be the test.

The winner’s circle keeps widening. Each earnings season this year has added names to the list of companies the AI buildout meaningfully rewards. Cisco joins the equipment and memory suppliers as proof that the capital flowing into AI touches the entire physical stack. For investors, the harder question is no longer who benefits — it is how much of that benefit is already reflected in the price. Cisco’s beat-and-fall is the market’s current answer: a lot.