Zscaler beats consensus and plunges 31%: memory and CPU costs cut cash projection by 370 basis points

Zscaler exceeded all headline metrics when reporting its third fiscal quarter of 2026 on 27 May. Revenue reached $850.5 million, up 25% year-on-year, against a consensus of $835.66 million. Non-GAAP earnings per share came in at $1.08, compared to the expected $1.01. Annual recurring revenue grew 25% to $3.525 billion. The non-GAAP operating margin hit a record 23%. Nevertheless, the stock plunged 31% on the same day.

The reason lies in the cash generation line. CFO Kevin Rubin lowered the free cash flow margin projection for the entire year from a range of 26.5% to 27% to 22.8% to 23.3%, a reduction of approximately 370 basis points. For a company growing at 25% per year and whose valuation narrative hinges on converting ARR into cash, this cut was a shock.

The explanation that matters for the rest of SaaS

Rubin was explicit about the reason. "We are accelerating data centre equipment acquisitions for the fourth quarter to lock in prices before these costs rise further," he stated during the conference call. In other words, memory, storage, and processors are experiencing a rapid price escalation sufficient to warrant bringing forward an entire quarter of capex, even at the expense of cash generation.

This insight directly correlates with what Micron signalled the day before, as it exceeded $1 trillion in market value: HBM and DRAM are allocated for 2026, and prices are no longer in the traditional deflationary cycle. For Zscaler, which operates its own cloud security infrastructure, the translation is straightforward. Each new point of presence or capacity expansion requires hardware purchased in a market facing delays and premiums. The unit cost of serving customers is rising at the exact moment the SaaS category needs to open margin to invest in AI agents.

The adjusted budget preserved other metrics. Zscaler raised the low end of its annual ARR projection to $3.740 billion to $3.749 billion, an increase of approximately 24%. Annual revenue was revised to $3.3295 billion to $3.3325 billion, growth of 24.6% to 24.7%. Non-GAAP earnings per share for the year will be $4.10 to $4.11, up 25%. Operational guidance remains intact. What has changed is the equation of return per dollar of capex.

Domino effect on cybersecurity peers

The reaction from peers was immediate. CrowdStrike and Palo Alto Networks fell on 27 May in tandem with Zscaler's plunge, even before they reported. The market's reading suggests that the incremental margin thesis of 30% to 40% via AI automation, sold at analyst conferences in the first quarter, is being discounted by another reading: the underlying infrastructure requires larger and more frequent capex.

Zscaler's OneCloud processes, according to the company, over 500 billion transactions per day. Each increment of model inference for detection, each new AI sensor applied, multiplies the memory demand. Companies like Cloudflare, which reported a 600% increase in internal AI use over three months at the beginning of May, will face the same equation in the next capex cycle.

The Brazilian reading: cost pass-through to customers has already begun

In Brazil, Zscaler serves Itaú, Petrobras, B3, and a significant part of the private financial sector, with coordinated commercial presence from São Paulo. Multi-year contract renewals in the second half of 2026 will arrive with cost pass-through clauses. Security directors negotiating Zero Trust contracts should expect two concrete changes: first, a reduction in volume discounts; second, the linking of SLA to computational consumption, rather than the number of seats.

Domestic suppliers such as Stefanini Rafael, Cipher, and internal banking SOC teams gain a short competitive window. Stefanini, which sells Managed Detection and Response based on partnerships with Microsoft Sentinel and CrowdStrike Falcon, can argue for a fixed price in local currency while American sellers pass on the dollar plus memory cost. However, the window depends on the same hardware. If Stefanini buys Dell PowerEdge XE9680 with Blackwell to operate its own SOC, it inherits the same queue.

The point that matters for the CIO's office is structural. The first decade of enterprise SaaS was built on near-zero marginal cost. The second begins with marginal costs rising at every model cycle. Today, Zscaler is the first large-scale software vendor to put this accounting in public guidance. It will not be the last.