Fortinet Lifts 2026 Guidance on Firewall, SASE Demand: Buy the Stock?

Fortinet, Inc. FTNT has given investors fresh reason to pay attention after raising its full-year 2026 guidance on the back of accelerating firewall refresh cycles and surging SASE adoption. The upgraded outlook, delivered alongside second-quarter results, points to durable, broad-based demand across the company's security fabric, and the fundamentals underpinning that demand suggest the stock deserves a place in growth-oriented portfolios in the near term.

Fortinet shares have gained 103.9% in the year-to-date period, outperforming the Zacks Security industry and the broader Computer and Technology sector’s growth of 86.2% and 17.7%, respectively. The rally is best viewed as the market catching up to accelerating billings and guidance rather than a stretched move, making the current entry point still reasonable for new positions.

FTNT’s 6-Month Price Performance

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Guidance Raised Across the Board

Following second-quarter 2026 results that topped the high end of prior guidance, management lifted full-year revenue guidance to $8.02-$8.18 billion, implying roughly 19% year-over-year growth, compared with the prior outlook of $7.71-$7.87 billion. Billings are raised to $9.35-$9.55 billion, service revenues are projected at $5.18-$5.22 billion, and non-GAAP EPS is anticipated between $3.41 and $3.47. Non-GAAP operating margin guidance stands at 35-37%, with non-GAAP gross margin guided to 79-81%.

The Zacks Consensus Estimate for 2026 earnings stands at $3.40 per share, implying 23.19% year-over-year growth.

For the third quarter, the company guided revenues to be in the range of $2.01-$2.10 billion and non-GAAP EPS to be between 83 cents and 87 cents. Infrastructure investment guidance for the full year was set at $350-$550 million, while full-year cash taxes are expected between $400 million and $450 million. This breadth of upward revisions across revenue, billings, margin and earnings metrics signals management's confidence that current demand trends are structural rather than a one-quarter pop.

SASE Firewall Convergence Driving the Cycle

The core fundamental thesis rests on Fortinet's "SASE Firewall" positioning — the convergence of firewall, SD-WAN and SASE functionality on a single FortiOS operating system powered by purpose-built FortiASIC silicon. This architecture lets customers deploy consistent security policy on-premises, at the edge, or in the cloud without stitching together multiple vendors. That convergence was extended in late July with the launch of the FortiGate 1200G series paired with FortiSASE Outpost, which delivers up to 397 Gbps of firewall throughput and brings cloud-delivered SASE services into customer-controlled environments, targeting the sovereignty, latency and compliance needs of AI-era, encrypted-traffic workloads. Fortinet was also recognized as a Challenger in the 2026 Gartner Magic Quadrant for SASE Platforms, reinforcing its expanding footprint in that category.

AI Woven Into the Security Fabric

Artificial intelligence is increasingly central to Fortinet's product roadmap and go-to-market motion. FortiOS 8.0, introduced at Fortinet Accelerate 2026, added Secure AI Controls for shadow-AI visibility and fabric-based AI agents. In June, the company launched FortiSOC, a cloud-delivered security operations platform that embeds agentic AI to autonomously investigate and correlate alerts and recommend or execute response actions under analyst oversight. In mid-July, Fortinet expanded FortiEndpoint with new AI-era capabilities, consolidating AI visibility and governance, endpoint detection and response, and data security into one agent, console and license, with availability expected in the third quarter. On the infrastructure side, Fortinet deepened integration with NVIDIA to accelerate its FortiAIGate solution, protecting AI workloads, data and autonomous agents across data centers and cloud environments. Management has also credited internal AI initiatives with contributing to record non-GAAP operating margin, pointing to an efficiency tailwind alongside the revenue opportunity.

Silicon Roadmap Strengthens the Moat

In late July, Fortinet announced a strategic collaboration with Intel to develop its next-generation Fortinet Security Processor 6, combining Fortinet's purpose-built ASIC expertise with Intel's advanced design, packaging and manufacturing capabilities. This is expected to advance Fortinet's long-term ASIC roadmap while strengthening supply chain resilience and geographic diversification — a fundamental input into the performance and cost advantages that differentiate FortiGate appliances from software-only competitors.

Valuation and Competitive Landscape

From a valuation standpoint, FTNT appears overvalued, trading at a forward 12-month price-to-earnings ratio of 44.39, higher than the sector's average of 21.53. The company carries a Value Score of F, though the premium is justified by Fortinet's superior margin profile, raised guidance trajectory and expanding AI- and SASE-driven total addressable market.

FTNT’s Valuation

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Competitively, Fortinet operates alongside Palo Alto Networks PANW, Qualys QLYS and Cisco CSCO. Palo Alto Networks remains the largest platform rival, competing directly in firewall and SASE; Cisco leverages its networking incumbency to bundle security, competing with Fortinet's converged approach; and Qualys, more focused on vulnerability and exposure management, overlaps with Fortinet's broader security operations ambitions. Against Palo Alto Networks, Cisco and Qualys, Fortinet's ASIC-driven cost structure remains a differentiator.

Conclusion

Fortinet's raised 2026 guidance reflects genuine fundamental momentum — a firewall refresh cycle, expanding SASE convergence, deepening AI integration across SecOps and endpoint products and a strengthening silicon supply chain via Intel. While valuation is undeniably rich, the depth and breadth of Fortinet's product-led growth drivers support a constructive near-term stance on the stock. Fortinet currently carries a Zacks Rank #3 (Hold). You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here. 

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This article originally published on Zacks Investment Research (zacks.com).

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