Major ClientsNarrow moat

Cisco Systems (CSCO) — moat facet

Cisco disclosed a customer above 10% of revenue for the first time in fiscal 2026, a distributor, while its hyperscaler sales tripled as a share of revenue.

For years Cisco could say that no customer mattered much. Its 10-Ks from fiscal 2018 to fiscal 2025 said no single customer accounted for 10% or more of revenue12. The fiscal 2026 10-K says: "We had a global channel partner that accounted for approximately 11 % of our total revenue in fiscal 2026"3. The same partner accounted for about 15% of accounts receivable4.

Revenue by segment, FY2026 ($M)Americas 37,799 — 60%EMEA 16,613 — 26%APJC 8,914 — 14%Cisco Form 10-K FY2026
Broad by region, newly concentrated by channel.

The partner is a distributor, not an end customer, so the concentration is in the route to market rather than in demand. A substantial portion of Cisco's products and services is sold indirectly through channel partners5, and one of them has now become very large.

End-customer concentration is rising too, from a different direction. AI infrastructure sold to cloud and hyperscaler customers was about 6% of revenue in fiscal 2026 against less than 2% in fiscal 20256, and Cisco warns that such sales "may depend on a limited number of customers' capital spending levels"7.

Revenue and commitments tell different stories. No customer concentration is disclosed in the $46.7 billion backlog8, but Cisco says a significant portion of its $17.2 billion of purchase commitments supports hyperscalers and other large customers9.

Cisco sells through a two-tier model. Distributors buy from Cisco and resell to smaller partners, and Cisco recognises that revenue "based on a sell-in method"10, with rebates and price-protection credits. That means a distributor's decision to hold more or less stock appears in Cisco's revenue immediately, which is why one of them passing 10% of revenue deserves attention even though the underlying buyers are thousands of companies.

The backlog carries no such disclosure. Cisco reports $46,734 million of remaining performance obligations, split between $23,436 million of products and $23,298 million of services11, and names no customer within it. Revenue concentration, commitment concentration and backlog concentration are three different numbers here, and only the first is disclosed.

Geographically the base is broad: Americas 59.7%, EMEA 26.2%, APJC 14.1% of revenue12. The figure to follow is the largest customer's share; if the channel partner passes 15% of revenue, or a hyperscaler appears in the disclosure, Cisco will have traded a diversified base for a concentrated one.

Moat trajectory: Narrowing

First 11% channel partner; hyperscaler AI about 6% of revenue.

The number that tests this moat
Reported
Largest customer share of revenue
About 11%, a global channel partner (FY2026); none above 10% in FY2025

Concentration of the route to market; a rise above 15% or a hyperscaler above 10% would mark a concentrated base.

Source: Cisco Form 10-K, FY2026 ↗
Dig deeper
DIG DEEPER 01
One Channel Partner, 11% of Revenue
A single distributor now accounts for 11% of Cisco's revenue and 15% of what Cisco is owed.
DIG DEEPER 02
The Hyperscalers: 6% of Revenue and Rising
Four cloud buyers took Cisco's hyperscaler revenue from under 2% to about 6% of the company in a year, and they can build their own equipment.
DIG DEEPER 03
$17.2 Billion Committed for a Few Buyers
Cisco has committed $17.2 billion to suppliers, more than double a year earlier, largely to serve a few hyperscalers.
DIG DEEPER 04
The Customers Outside the AI Boom
Cisco's orders outside the hyperscalers grew 25% in the fourth quarter, which says the enterprise base is refreshing, not just the cloud buyers.
References
  1. ReportedIts 10-Ks from fiscal 2018 to fiscal 2025 said no single customer accounted for 10% or more of revenue.
    Cisco Systems Form 10-K for fiscal 2018 - product and services revenue for fiscal 2016-2018 and buybacks. — FY2018 · publ. September 2018 · source ↗
  2. ReportedIts 10-Ks from fiscal 2018 to fiscal 2025 said no single customer accounted for 10% or more of revenue.
    Cisco Systems Form 10-K for fiscal 2025 - the supplier settlement of 26 August 2025, Security growth of 59% and fiscal 2025 net income of $10,180 million. — FY2025 · publ. 3 September 2025 · source ↗
  3. ReportedThe fiscal 2026 10-K says: "We had a global channel partner that accounted for approximately 11 % of our total revenue in fiscal 2026".
    Cisco Systems Form 10-K for fiscal 2026 (year ended 25 July 2026) - financial statements and notes: balance sheet, cash flow, commitments, customers and acquisitions. — FY2026 · publ. 2 September 2026 · source ↗
  4. ReportedThe same partner accounted for about 15% of accounts receivable.
    Cisco Systems Form 10-K for fiscal 2026 (year ended 25 July 2026) - financial statements and notes: balance sheet, cash flow, commitments, customers and acquisitions. — FY2026 · publ. 2 September 2026 · source ↗
  5. ReportedA substantial portion of Cisco's products and services is sold indirectly through channel partners, and one of them has now become very large.
    Cisco Systems Form 10-K for fiscal 2026 (year ended 25 July 2026) - financial statements and notes: balance sheet, cash flow, commitments, customers and acquisitions. — FY2026 · publ. 2 September 2026 · source ↗
  6. ReportedAI infrastructure sold to cloud and hyperscaler customers was about 6% of revenue in fiscal 2026 against less than 2% in fiscal 2025, and Cisco warns that such sales "may depend on a limited number of customers' capital spending levels".
    Cisco Systems Form 10-K for fiscal 2026 (year ended 25 July 2026) - Item 7 MD&A: revenue by product category and segment, and gross margins. — FY2026 · publ. 2 September 2026 · source ↗
  7. ReportedAI infrastructure sold to cloud and hyperscaler customers was about 6% of revenue in fiscal 2026 against less than 2% in fiscal 2025, and Cisco warns that such sales "may depend on a limited number of customers' capital spending levels".
    Cisco Systems Form 10-K for fiscal 2026 (year ended 25 July 2026) - Item 7 MD&A: revenue by product category and segment, and gross margins. — FY2026 · publ. 2 September 2026 · source ↗
  8. ReportedNo customer concentration is disclosed in the $46.7 billion backlog, but Cisco says a significant portion of its $17.2 billion of purchase commitments supports hyperscalers and other large customers.
    Cisco Systems Form 10-K for fiscal 2026 (year ended 25 July 2026) - financial statements and notes: balance sheet, cash flow, commitments, customers and acquisitions. — FY2026 · publ. 2 September 2026 · source ↗
  9. ReportedNo customer concentration is disclosed in the $46.7 billion backlog, but Cisco says a significant portion of its $17.2 billion of purchase commitments supports hyperscalers and other large customers.
    Cisco Systems Form 10-K for fiscal 2026 (year ended 25 July 2026) - financial statements and notes: balance sheet, cash flow, commitments, customers and acquisitions. — FY2026 · publ. 2 September 2026 · source ↗
  10. ReportedDistributors buy from Cisco and resell to smaller partners, and Cisco recognises that revenue "based on a sell-in method", with rebates and price-protection credits.
    Cisco Systems Form 10-K for fiscal 2026 (year ended 25 July 2026) - Item 1 business: products, strategy, employees and sales. — FY2026 · publ. 2 September 2026 · source ↗
  11. ReportedCisco reports $46,734 million of remaining performance obligations, split between $23,436 million of products and $23,298 million of services, and names no customer within it.
    Cisco Systems Form 10-K for fiscal 2026 (year ended 25 July 2026) - financial statements and notes: balance sheet, cash flow, commitments, customers and acquisitions. — FY2026 · publ. 2 September 2026 · source ↗
  12. ReportedGeographically the base is broad: Americas 59.7%, EMEA 26.2%, APJC 14.1% of revenue.
    Cisco Systems Form 10-K for fiscal 2026 (year ended 25 July 2026) - Item 7 MD&A: revenue by product category and segment, and gross margins. — FY2026 · publ. 2 September 2026 · source ↗
Sources
Generated September 25, 2026