Major ClientsNarrow moat

ExxonMobil (XOM) — moat facet

No customer above ten per cent — and the largest single buyer of ExxonMobil's output is ExxonMobil.

ExxonMobil's 10-K contains no customer concentration disclosure, because there is nothing to disclose. No buyer reaches the ten per cent threshold that would require naming, in a company that sold $323,905 million of product in 20251 across most countries in the world.

Revenue from the largest single customer~67%CoreWeave22%Nvidia20.4%Kioxianone above 10%ExxonMobilExxonMobil files no concentration disclosure at all, on $323,905m of 2025 sales.
Perfect diversification, and it is the consequence of having no pricing power rather than evidence of a moat.

Set that against the other extreme in this collection. CoreWeave took about sixty-seven per cent of its revenue from one customer2; Nvidia disclosed one direct customer at twenty-two per cent and another at fourteen3; Kioxia named Apple at 20.4 per cent4. ExxonMobil has none of that, and for the most ordinary reason: a barrel of oil and a tonne of polyethylene are fungible, so the customer has no leverage and neither does the seller. Diversification here is the consequence of having no pricing power, not evidence of a moat.

What the company does have is four relationships that behave nothing like each other, and only one of them is a customer in the usual sense.

The largest single buyer of ExxonMobil's production is ExxonMobil. Intersegment revenue was $121,005 million in 2025, more than a quarter of gross segment revenue, eliminated on consolidation and invisible in the headline5. Non-US Upstream sold $36,769 million internally against $13,993 million to outside parties — nearly three to one6.

The second is governments, which appear on both sides of every barrel: as the landlord granting the lease or production-sharing contract, as the tax authority taking $11,504 million of income tax, and as the collector of $25,167 million of other taxes and duties that ExxonMobil gathers at the pump on their behalf7.

The third is not a customer at all. Of $323,905 million of sales and other operating revenue, $96,996 million — thirty per cent — sits outside the scope of the revenue accounting standard entirely, because it relates to physically settled commodity contracts accounted for as derivatives8. Nearly a third of the top line is a trading position that settles physically.

The rating on this aspect is narrow rather than wide, which is a deliberate departure from how this collection usually treats an absence of concentration. There is no customer who can hurt ExxonMobil. There is also no customer who can be kept, and that is the same fact seen from the other side.

The evidence here is an absence. No customer above ten per cent, in any of the last three years9.

Moat trajectory: Holding steady

No customer has reached ten per cent in any of the last three years and none is likely to. The structure is unchanged: diversification by name, concentration in one commodity price, and a state on both sides of every barrel.

The number that tests this moat
Reported
Sales and other operating revenue, latest quarter
$114,529M in Q2 2026, from $79,477M

No customer is material, so revenue moves with commodity prices rather than with any buyer. A 44% rise in a quarter when production fell shows that.

Source: ExxonMobil Holdings Form 10-Q, Q2 2026 ↗
Dig deeper
DIG DEEPER 01
No Customer Worth Naming, in a Hundred Countries
Perfect diversification, and it is the consequence of having no pricing power rather than evidence of a moat.
DIG DEEPER 02
ExxonMobil Is Its Own Largest Customer
A hundred and twenty-one billion dollars of revenue that never reaches an outside buyer, priced as though it had.
DIG DEEPER 03
The Governments on Both Sides of the Barrel
Landlord, tax authority, partner and collector — and the state takes more from a barrel than the owners do.
DIG DEEPER 04
A Third of the Revenue Is Not a Sale
Thirty per cent of the top line is not a sale at all; it is a derivative that settled with a cargo attached.
References
  1. ReportedNo buyer reaches the ten per cent threshold that would require naming, in a company that sold $323,905 million of product in 2025 across most countries in the world.
    Exxon Mobil Corporation Form 10-K for FY2025, consolidated financial statements — statement of income, balance sheet, statement of cash flows and statement of changes in equity including the common stock share activity table. — FY2025 · publ. February 2026 · source ↗
  2. ReportedCoreWeave took about sixty-seven per cent of its revenue from one customer; Nvidia disclosed one direct customer at twenty-two per cent and another at fourteen; Kioxia named Apple at 20.4 per cent.
    CoreWeave Form 10-K, fiscal 2025 — revenue $5.13B (+168%), net loss ~−$1.2B; customer concentration disclosed (largest customer ~2/3 of revenue) — FY2025 · publ. early 2026 · source ↗
  3. ReportedCoreWeave took about sixty-seven per cent of its revenue from one customer; Nvidia disclosed one direct customer at twenty-two per cent and another at fourteen; Kioxia named Apple at 20.4 per cent.
    NVIDIA Form 10-K, FY2026 — "For fiscal year 2026, sales to one direct customer represented 22% of total revenue and sales to another direct customer represented 14% of total revenue"; FY2025: one at 12% and two at 11% each; FY2024: one at 13%. Direct customers include OEMs, ODMs, distributors and system integrators; indirect customers (CSPs, Neocloud builders, AI model makers, enterprises, public sector) buy through them, and NVIDIA "estimate[s] some individually representing 10% or more of our revenue". "Our revenue is concentrated among a limited number of direct and indirect customers and this trend may continue." — FY2026 (ended Jan 25, 2026) · publ. February 2026 · source ↗
  4. ReportedCoreWeave took about sixty-seven per cent of its revenue from one customer; Nvidia disclosed one direct customer at twenty-two per cent and another at fourteen; Kioxia named Apple at 20.4 per cent.
    Kioxia Holdings Corporation, Annual Securities Report for the year from 1 April 2025 to 31 March 2026 (8th Period) — revenue ¥2,337,628M against ¥1,706,460M, gross profit ¥1,012,904M, operating profit ¥869,013M, profit for the year ¥554,490M; research and development cost ¥141,052M against ¥132,798M; purchases of property, plant and equipment ¥281,062M against ¥223,847M; operating cash flow ¥616,540M; proceeds from government grants ¥56,396M against ¥43,748M, from an approved ceiling of ¥150.0bn for flash production at the Yokkaichi and Kitakami plants with about ¥31.8bn not yet received. Revenue by application: SSD & Storage ¥1,362,638M, Smart Devices ¥759,978M, Other ¥215,012M — 'Other' including retail products and sales to the Sandisk group recorded through the three manufacturing joint ventures. Revenue by geography: Japan ¥263,252M, North America and Europe ¥1,217,643M, Asia ¥856,733M, with the United States ¥1,098,832M, China ¥381,857M and Taiwan ¥300,932M. Non-current assets: Japan ¥1,658,950M, North America and Europe ¥1,986M, Asia ¥6,298M. Major customers: Apple group ¥476,014M (20.4%), with the Sandisk and Dell groups omitted for the year as each fell below 10% of sales. Flash Partners Ltd., Flash Alliance Ltd. and Flash Forward LLC are accounted for as joint operations with 50.1% of the voting rights and equal decision-making rights shared with Sandisk. Net interest-bearing debt ¥552,085M against equity of ¥1,398,929M — a net debt-to-equity ratio of 0.39 times, from ¥931,035M against ¥737,565M and 1.26 times a year earlier; USD-denominated senior notes at 6.25% (2030) and 6.625% (2033); goodwill of ¥395,585M from the 1 June 2018 acquisition of the former Toshiba Memory Corporation. Bain Capital funds indirectly hold 21.87% and Toshiba Corporation 17.59% of outstanding common shares, both having sold substantial holdings during the year. Risk factors state that the Yokkaichi Plant is located in an area with a high risk of earthquakes and floods and the Kitakami Plant in an area severely damaged by the 2011 Tohoku Earthquake, and name US-China trade frictions and US tariff policy among factors that may materially affect the business. The company does not provide plans or progress reports for the overall fiscal year. — year to 31 March 2026 · publ. 2026-06 · source ↗
  5. ReportedIntersegment revenue was $121,005 million in 2025, more than a quarter of gross segment revenue, eliminated on consolidation and invisible in the headline.
    Exxon Mobil Corporation Form 10-K for FY2025, notes to the consolidated financial statements — Note 3 Disclosures about Segments and Related Information (segment revenue, intersegment revenue, segment income, additions to property plant and equipment, total assets, geographic revenue and the revenue-from-contracts disaggregation), Note 7 Litigation and Other Contingencies, and Note 20 Mergers and Acquisitions covering Pioneer Natural Resources and Denbury. — FY2025 · publ. February 2026 · source ↗
  6. ReportedNon-US Upstream sold $36,769 million internally against $13,993 million to outside parties — nearly three to one.
    Exxon Mobil Corporation Form 10-K for FY2025, notes to the consolidated financial statements — Note 3 Disclosures about Segments and Related Information (segment revenue, intersegment revenue, segment income, additions to property plant and equipment, total assets, geographic revenue and the revenue-from-contracts disaggregation), Note 7 Litigation and Other Contingencies, and Note 20 Mergers and Acquisitions covering Pioneer Natural Resources and Denbury. — FY2025 · publ. February 2026 · source ↗
  7. ReportedThe second is governments, which appear on both sides of every barrel: as the landlord granting the lease or production-sharing contract, as the tax authority taking $11,504 million of income tax, and as the collector of $25,167 million of other taxes and duties that ExxonMobil gathers at the pump on their behalf.
    Exxon Mobil Corporation Form 10-K for FY2025, consolidated financial statements — statement of income, balance sheet, statement of cash flows and statement of changes in equity including the common stock share activity table. — FY2025 · publ. February 2026 · source ↗
  8. ReportedOf $323,905 million of sales and other operating revenue, $96,996 million — thirty per cent — sits outside the scope of the revenue accounting standard entirely, because it relates to physically settled commodity contracts accounted for as derivatives.
    Exxon Mobil Corporation Form 10-K for FY2025, notes to the consolidated financial statements — Note 3 Disclosures about Segments and Related Information (segment revenue, intersegment revenue, segment income, additions to property plant and equipment, total assets, geographic revenue and the revenue-from-contracts disaggregation), Note 7 Litigation and Other Contingencies, and Note 20 Mergers and Acquisitions covering Pioneer Natural Resources and Denbury. — FY2025 · publ. February 2026 · source ↗
  9. ReportedNo customer above ten per cent, in any of the last three years.
    Exxon Mobil Corporation Form 10-K for FY2025, Items 1 and 2 — Business and Properties: oil and gas production and reserves tables, wells drilling, the review of principal ongoing activities by region (United States, Canada/Other Americas incl. Guyana and Brazil, Europe, Africa, Asia, Australia/Oceania), lease and production-sharing terms including the Guyana Petroleum Activities Act 2023, employees, and the list of lower-emission and new business opportunities. — FY2025 · publ. February 2026 · source ↗
Sources
Generated September 23, 2026