Major ClientsThin moat

Marvell Technology (MRVL) — moat facet

Ten customers are 82% of revenue and the largest is a distributor nobody can name — the concentration table describes who Marvell bills, not who uses the chips.

Marvell's customer disclosure is more revealing than most, and what it reveals is uncomfortable. Ten customers account for 82% of total net revenue1. Four customers account for 73% of gross accounts receivable2. This is among the most concentrated customer bases of any company in this collection.

Customer concentration, FY202682%Top 10 customers37%Distributor A73%Top 4 of gross receivables14%Largest direct customerAll figures from the FY2026 10-K. Among the most concentrated in this collection.
Ten buyers are 82% of revenue — and the largest single name is a distributor, not a hyperscaler.

The composition is stranger than the concentration. Marvell names two relationships above 10% of revenue, and the larger of them is not a hyperscaler at all — it is a distributor, at 37% of total net revenue, up from 24% two years earlier. The largest named direct customer is 14%3. So the companies everyone associates with Marvell — Amazon, Microsoft, Google — are largely invisible in the concentration table, because much of what they buy arrives through the channel rather than on a direct invoice. The disclosure describes who Marvell bills, not who uses the chips.

Split by type, direct customers were $4,630.4 million of fiscal 2026 revenue (57%) and distributors $3,564.2 million (43%)4. That distributor share has been rising, which is worth watching for a reason that has nothing to do with credit: a channel between a supplier and its end customers is a place where visibility goes to die.

The four pages here work through it in order — the 37% distributor, the 82% concentration, the direct-versus-indirect question, and then the one genuine counterweight: the optical module business, which really does sell to many buyers. That last page is why the concentration, while extreme, is not the whole story. Watch the ten-largest-customer percentage each year. It is the single cleanest measure of whether this company is diversifying or narrowing.

Moat trajectory: Narrowing

The concentration is deepening rather than easing. Ten customers went to 82% of revenue, the largest distributor from 24% to 37% in two years, and the divestiture of automotive removed one of the few revenue streams that had nothing to do with hyperscaler capital spending. Every one of those moves was individually defensible and the aggregate is a company more dependent on fewer buyers than it was. The optical module base is the counterweight, and it is not yet large enough to be one.

The number that tests this moat
Reported
Share of revenue from the ten largest customers
82% in fiscal 2026

Among the most concentrated customer bases in this collection, and the receivables are tighter still — four customers were 73% of gross accounts receivable. Watch this figure annually: rising through the boom would mean Marvell is riding a capital-spending cycle rather than building a franchise underneath it.

Source: Marvell Form 10-K, FY2026 (customer concentration disclosure) ↗
Dig deeper
DIG DEEPER 01
Distributor A: The 37% Nobody Can Name
Marvell's biggest single relationship isn't a hyperscaler, it's a channel partner that went from 24% to 37% of revenue in two years.
DIG DEEPER 02
Ten Customers, Eighty-Two Percent
The most concentrated customer base in this collection — and the receivables, at 73% from four names, are tighter still.
DIG DEEPER 03
Direct and Indirect: Who Actually Uses the Chips
43% of revenue arrives through distributors, so the famous customers are largely invisible in the filing — and 82% is a floor on the real…
DIG DEEPER 04
The Module Makers: The Half That Sells to Many
One part designed once and sold to every module maker on earth — the only half of Marvell that isn't built around a single buyer.
References
  1. ReportedTen largest customers were 82% of net revenue; four customers were 73% of gross accounts receivable; direct $4,630.4M (57%) vs distributors $3,564.2M (43%); Distributor A 37%, largest direct customer 14%.
    Marvell Form 10-K, FY2026 — customer concentration: ten largest customers 82% of total net revenue; two customers above 10% (Direct Customer A 14%, up from 13%; Distributor A 37%, up from 34% and 24%); accounts receivable concentrated with four customers at 73% of gross receivables (72% prior year); net revenue by customer type direct $4,630.4M (57%) and distributors $3,564.2M (43%) — FY2026 (ended January 31, 2026) · publ. March 11, 2026 · source ↗
  2. ReportedFour customers represented 73% of gross accounts receivable at the FY2026 year end.
    Marvell Form 10-K, FY2026 — customer concentration: ten largest customers 82% of total net revenue; two customers above 10% (Direct Customer A 14%, up from 13%; Distributor A 37%, up from 34% and 24%); accounts receivable concentrated with four customers at 73% of gross receivables (72% prior year); net revenue by customer type direct $4,630.4M (57%) and distributors $3,564.2M (43%) — FY2026 (ended January 31, 2026) · publ. March 11, 2026 · source ↗
  3. ReportedThe largest named direct customer was 14% of net revenue; Distributor A was 37%.
    Marvell Form 10-K, FY2026 — customer concentration: ten largest customers 82% of total net revenue; two customers above 10% (Direct Customer A 14%, up from 13%; Distributor A 37%, up from 34% and 24%); accounts receivable concentrated with four customers at 73% of gross receivables (72% prior year); net revenue by customer type direct $4,630.4M (57%) and distributors $3,564.2M (43%) — FY2026 (ended January 31, 2026) · publ. March 11, 2026 · source ↗
  4. ReportedDirect customers were $4,630.4M (57%) of FY2026 revenue and distributors $3,564.2M (43%).
    Marvell Form 10-K, FY2026 — customer concentration: ten largest customers 82% of total net revenue; two customers above 10% (Direct Customer A 14%, up from 13%; Distributor A 37%, up from 34% and 24%); accounts receivable concentrated with four customers at 73% of gross receivables (72% prior year); net revenue by customer type direct $4,630.4M (57%) and distributors $3,564.2M (43%) — FY2026 (ended January 31, 2026) · publ. March 11, 2026 · source ↗
Sources
Generated September 23, 2026