The Supplier Who Became an AdvertiserWide moat

Walmart (WMT) — moat facet

The same counterparty on both sides of the ledger, paying Walmart for access to a shelf it sold Walmart the right to occupy.

The most interesting customer relationship inside Walmart runs backwards. The companies that sell goods to Walmart now buy three things from it.

Revenue growth against global advertising growth, by quarter (%)Total revenueAdvertisingQ4 FY254.1%29.0%Q1 FY262.5%50.0%Q2 FY264.8%46.0%Q3 FY265.8%53.0%Q4 FY265.6%37.0%Q1 FY277.3%37.0%Q2 FY275.9%38.0%Walmart quarterly earnings releases; advertising includes VIZIO from Q4 FY2025
Advertising has grown between five and twenty times as fast as revenue in every quarter shown. Part of the step up in fiscal 2026 is VIZIO, bought in December 2024, so the gap from fiscal 2027 on is the cleaner measure, and it is still about 30 points.

They buy advertising: roughly $6.4 billion in fiscal 2026, up 46%1, sold through Walmart Connect, which reaches more than 150 million weekly American customers and reports that advertising sellers generate on average seven times the sales of non-advertising sellers2. They buy fulfilment: Walmart's supply chain and fulfilment capabilities are offered to marketplace sellers as a service3. And they buy information — Walmart explicitly lists "data analytics and insights for suppliers and brands" among its offerings4.

Consider what that arrangement means for the supplier. It sells to Walmart at a negotiated wholesale price. It then pays Walmart to be visible on the shelf it just sold into, and pays again for the data telling it how the product performed on that shelf. Meanwhile Walmart's own Great Value or Equate version sits on the adjacent facing, funded by the margin on all of it.

This is the single largest change in Walmart's economics in a generation, and it is invisible in the segment reporting, where the advertising revenue is scattered between net sales and a reduction of cost of sales depending on the arrangement5. A business that is about one per cent of revenue and close to a fifth of operating profit does not appear as a line anywhere.

The dependency runs both ways, which is what makes it durable. Suppliers cannot reach American households at this scale anywhere else, and Walmart cannot raise the advertising fee indefinitely out of a supplier margin it is simultaneously squeezing.

Hold advertising growth against net sales growth: 38% against 5.9% in the June 2026 quarter6. That gap is the supplier becoming a customer, in real time.

Moat trajectory: Widening

Advertising grew 38% in the June quarter against net sales of 5.9%, and the same suppliers are now buying fulfilment and data as well. Each additional service deepens a relationship that already runs in both directions, and Walmart is the only place these suppliers can reach American households at this scale.

The number that tests this moat
Reported
Advertising growth against net sales growth
38% against 5.9%

The same companies that sell goods to Walmart now buy advertising, fulfilment and data from it. That gap is the supplier becoming a customer in real time, and it is funded out of a supplier margin Walmart is simultaneously squeezing.

Source: Walmart second-quarter fiscal 2027 results (August 20, 2026) ↗
References
  1. ReportedThey buy advertising: roughly $6.4 billion in fiscal 2026, up 46%, sold through Walmart Connect, which reaches more than 150 million weekly American customers and reports that advertising sellers generate on average seven times the sales of non-advertising sellers.
    Marketing Dive - Walmart global advertising revenue of nearly $6.4 billion in fiscal 2026, up 46%, with Walmart Connect U.S. up 41% in the fourth quarter; advertising and membership fees accounted for about a third of fourth-quarter operating income — FY2026 · publ. 2026 · source ↗
  2. ReportedThey buy advertising: roughly $6.4 billion in fiscal 2026, up 46%, sold through Walmart Connect, which reaches more than 150 million weekly American customers and reports that advertising sellers generate on average seven times the sales of non-advertising sellers.
    Walmart Connect - the U.S. retail media business reaches more than 150 million weekly customers through omnichannel solutions; Walmart's first-party data states that advertising sellers generate on average seven times the sales of non-advertising sellers and that 83% of top Marketplace sellers advertise on Connect — 2026 · publ. June 22, 2026 · source ↗
  3. ReportedThey buy fulfilment: Walmart's supply chain and fulfilment capabilities are offered to marketplace sellers as a service.
    Walmart Form 10-K, fiscal year ended January 31, 2026 - Item 1 Business and Item 2 Properties (approximately 280 million customers a week across more than 10,900 stores in 19 countries; 2.1 million associates, 1.6 million in the U.S.; 4,611 Walmart U.S. retail units of which 3,728 owned, 601 Sam's Clubs of which 464 owned, 5,743 international stores of which 1,486 owned; 3,566 supercenters at 633,724 thousand square feet, 351 discount stores at 36,609, 694 neighborhood markets and small formats at 36,609/28,375 with a 42,000 average; 192 U.S. and 179 international distribution facilities, 149 owned; pickup and delivery at over 8,400 locations globally; EDLP and EDLC; private brands; competition; Flipkart and PhonePe majority stakes in 2018) — FY2026 (ended January 31, 2026) · publ. March 13, 2026 · source ↗
  4. ReportedAnd they buy information — Walmart explicitly lists "data analytics and insights for suppliers and brands" among its offerings.
    Walmart Form 10-K, fiscal year ended January 31, 2026 - Item 1 Business and Item 2 Properties (approximately 280 million customers a week across more than 10,900 stores in 19 countries; 2.1 million associates, 1.6 million in the U.S.; 4,611 Walmart U.S. retail units of which 3,728 owned, 601 Sam's Clubs of which 464 owned, 5,743 international stores of which 1,486 owned; 3,566 supercenters at 633,724 thousand square feet, 351 discount stores at 36,609, 694 neighborhood markets and small formats at 36,609/28,375 with a 42,000 average; 192 U.S. and 179 international distribution facilities, 149 owned; pickup and delivery at over 8,400 locations globally; EDLP and EDLC; private brands; competition; Flipkart and PhonePe majority stakes in 2018) — FY2026 (ended January 31, 2026) · publ. March 13, 2026 · source ↗
  5. ReportedThis is the single largest change in Walmart's economics in a generation, and it is invisible in the segment reporting, where the advertising revenue is scattered between net sales and a reduction of cost of sales depending on the arrangement.
    Walmart second-quarter fiscal 2027 earnings release (Form 8-K exhibit 99.1) - revenue $187.9 billion +5.9% and +5.1% in constant currency; operating income +28.8% and +17.4% adjusted in constant currency; global eCommerce +23%; global advertising +38% with Walmart Connect excluding VIZIO +43%; membership fee revenue +17%; gross profit rate +96 basis points and Walmart U.S. +158; Walmart U.S. comp sales +2.6% and operating income +20.6% with operating expenses deleveraged 72 basis points; Sam's Club operating income +44.3% and International +16.6%; ROA 8.0% and ROI 15.4%; free cash flow $5.5 billion; 42.3 million shares repurchased for $5.1 billion year to date; FY27 guidance of 4.0-5.0% net sales growth, 7.0-8.5% adjusted operating income growth and $2.80-$2.87 adjusted EPS — Q2 FY2027 · publ. August 20, 2026 · source ↗
  6. ReportedHold advertising growth against net sales growth: 38% against 5.9% in the June 2026 quarter.
    Walmart second-quarter fiscal 2027 earnings release (Form 8-K exhibit 99.1) - revenue $187.9 billion +5.9% and +5.1% in constant currency; operating income +28.8% and +17.4% adjusted in constant currency; global eCommerce +23%; global advertising +38% with Walmart Connect excluding VIZIO +43%; membership fee revenue +17%; gross profit rate +96 basis points and Walmart U.S. +158; Walmart U.S. comp sales +2.6% and operating income +20.6% with operating expenses deleveraged 72 basis points; Sam's Club operating income +44.3% and International +16.6%; ROA 8.0% and ROI 15.4%; free cash flow $5.5 billion; 42.3 million shares repurchased for $5.1 billion year to date; FY27 guidance of 4.0-5.0% net sales growth, 7.0-8.5% adjusted operating income growth and $2.80-$2.87 adjusted EPS — Q2 FY2027 · publ. August 20, 2026 · source ↗
Sources
Generated September 22, 2026