Thirty-Five Per Cent, on Almost No CapitalNarrow moat

ExxonMobil (XOM) — moat facet

Two and seven tenths per cent of the capital, and the highest return in the company — the two facts are the same fact.

The reason Specialty Products earns 35.4 per cent is partly that it is a good business and substantially that it barely uses any money. Average capital employed was $8,073 million in 2025 out of a corporate total of $305,775 million — two and seven tenths per cent1. Cash capital expenditure was $623 million against $24,659 million in Upstream2.

Average capital employed by segment, 2025, in $mUpstream209,934Energy Products37,683Chemical Products29,510Corporate and Financing20,575Specialty Products8,073Corporate total $305,775m. Specialty Products is 2.7% of it and earns 35.4% on it.
The best business in the company cannot absorb capital, so the capital goes to the worst one.

That asymmetry is the most interesting structural fact about ExxonMobil's portfolio, and it recurs everywhere in the table. Rank the four segments by capital employed: Upstream $209,934 million, Energy Products $37,683 million, Chemical Products $29,510 million, Specialty Products $8,073 million. Now rank them by return: 35.4, 19.7, 10.2, 2.7 per cent3. The ordering is almost exactly inverted.

There is nothing improper about this. An oil company has to own oil fields, and oil fields cost tens of billions of dollars. But it does explain why ExxonMobil's corporate return on capital sits at 9.3 per cent4 while it owns a business earning a third on its money: the good business is too small to matter, and the big business is too capital-hungry to earn much.

It also sets a test for management. Capital allocation in a company like this is the entire job, and the observable behaviour is that capital flows to the segments with the lowest returns — $24,659 million to Upstream, $623 million to Specialty Products in 20255. The defence is that there is nowhere to put the money in lubricants: the market is what it is, ExxonMobil already has a leading position in it, and buying share would destroy the margin that makes it attractive.

That defence is probably right, which is the uncomfortable part. The best business in the company cannot absorb capital, so the capital goes to the worst one, and the corporate return is the weighted average.

Watch Specialty Products capital employed as a share of the total. Two and seven tenths per cent in 2025, against 2.7 in 20246. If ExxonMobil ever finds a way to make that number materially larger without lowering the return, the corporate economics change. Nothing in the last decade suggests it can.

Moat trajectory: Holding steady

Capital employed has been essentially flat at around $8 billion and the return around thirty-five per cent, which is a business being harvested rather than scaled. That is almost certainly the right decision and it means the segment's weight in the company does not change.

The number that tests this moat
Reported
Specialty Products capital employed
$8,073 million, 2.7% of the corporate total

Against Upstream at $209,934 million and Chemical Products at $29,510 million. Rank the segments by capital and by return and the ordering is almost exactly inverted. The number to watch is whether this share ever rises materially without the return falling; nothing in the last decade suggests it can.

Source: Exxon Mobil Corporation Form 10-K, fiscal year 2025 ↗
⚠ Threats to the moat
⚠ THREAT 01
High Returns on a Tiny Base Attract Capital That Lowers Them
Every route to making the best business bigger runs through something that makes it worse.
References
  1. ReportedAverage capital employed was $8,073 million in 2025 out of a corporate total of $305,775 million — two and seven tenths per cent.
    Exxon Mobil Corporation Form 10-K for FY2025, Frequently Used Terms — the definitions and calculations of cash flow from operations and asset sales, capital employed, return on average capital employed, the earnings drivers (advantaged volume growth, advantaged assets, high-value products, base volume, structural cost savings, expenses, timing effects), and the full structural cost savings reconciliation against 2019. — FY2025 · publ. February 2026 · source ↗
  2. ReportedCash capital expenditure was $623 million against $24,659 million in Upstream.
    Exxon Mobil Corporation Form 10-K for FY2025, Business Profile (Financial) — earnings after income taxes, average capital employed, return on average capital employed and cash capital expenditures for each segment and geography, and the corporate total. — FY2025 · publ. February 2026 · source ↗
  3. ReportedNow rank them by return: 35.4, 19.7, 10.2, 2.7 per cent.
    Exxon Mobil Corporation Form 10-K for FY2025, Business Profile (Financial) — earnings after income taxes, average capital employed, return on average capital employed and cash capital expenditures for each segment and geography, and the corporate total. — FY2025 · publ. February 2026 · source ↗
  4. ReportedBut it does explain why ExxonMobil's corporate return on capital sits at 9.3 per cent while it owns a business earning a third on its money: the good business is too small to matter, and the big business is too capital-hungry to earn much.
    Exxon Mobil Corporation Form 10-K for FY2025, Frequently Used Terms — the definitions and calculations of cash flow from operations and asset sales, capital employed, return on average capital employed, the earnings drivers (advantaged volume growth, advantaged assets, high-value products, base volume, structural cost savings, expenses, timing effects), and the full structural cost savings reconciliation against 2019. — FY2025 · publ. February 2026 · source ↗
  5. ReportedCapital allocation in a company like this is the entire job, and the observable behaviour is that capital flows to the segments with the lowest returns — $24,659 million to Upstream, $623 million to Specialty Products in 2025.
    Exxon Mobil Corporation Form 10-K for FY2025, Business Profile (Financial) — earnings after income taxes, average capital employed, return on average capital employed and cash capital expenditures for each segment and geography, and the corporate total. — FY2025 · publ. February 2026 · source ↗
  6. ReportedTwo and seven tenths per cent in 2025, against 2.7 in 2024.
    Exxon Mobil Corporation Form 10-K for FY2025, Business Profile (Financial) — earnings after income taxes, average capital employed, return on average capital employed and cash capital expenditures for each segment and geography, and the corporate total. — FY2025 · publ. February 2026 · source ↗
Sources
Generated September 23, 2026