Five Hundred and Thirty-Five Billion Dollars of BuyingWide moat

Walmart (WMT) — moat facet

Scale does not buy a uniform discount; it buys the right to specify, the right to be paid to hold stock, and the option to make the thing instead.

Buying power is the most cited and least examined of Walmart's advantages, so it is worth being precise about what it actually buys.

Who funds the inventory ($bn), at 31 January 2026$63.1bnWalmart payables$58.9bnWalmart inventories$22.4bnCostco payables$19.4bnCostco inventoriesWalmart runs a $22.6bn working capital deficit and calls it the efficient use of cash.
The suppliers fund every item in every store and $4.2 billion besides. Costco, a quarter of the size, runs a $2.9 billion cushion on the same principle.

It does not buy a uniform discount. Walmart's suppliers include companies large enough to negotiate — the branded food and household manufacturers — and thousands too small to. What scale buys is the ability to specify: to demand a pack size, a pallet configuration, a delivery window, a price point for a particular shelf, and to have the supplier reconfigure a production line to meet it. The cost saved is mostly in the supply chain rather than the invoice.

It buys, second, the right to be paid to hold inventory. Walmart's accounts payable at 31 January 2026 were $63,061 million against inventories of $58,851 million1. The suppliers fund every item in every store and $4,210 million besides, which is why the company runs what it calls a working capital deficit — $22,600 million at the year end — and describes it as the efficient use of cash rather than a weakness2.

Third, it buys the option to make the thing instead. Walmart sells under Great Value, Equate, Mainstays, Ozark Trail, onn., Marketside, Freshness Guaranteed, bettergoods and a dozen more3. A supplier negotiating with a customer who can replicate the product on the adjacent facing is negotiating from a weak position whether or not Walmart ever uses the option.

The limit is that Walmart's largest categories are the ones where suppliers have the most power. Branded groceries and pharmaceuticals are not commodities, and a supercenter without Coca-Cola is not a supercenter.

Read it through the gap between payables and inventories: $4,210 million in Walmart's favour in fiscal 20264. Costco, a quarter of the size, runs $2,945 million5. If Walmart's ever turns negative, the suppliers have stopped funding the shelves.

Moat trajectory: Holding steady

Buying power at this scale does not compound; it is already near its practical maximum. Payables exceed inventories by $4,210 million, the private-brand option is fully developed, and the categories where Walmart has the most leverage are the ones with the least margin in them.

The number that tests this moat
Moat Explorer calc
Payables less inventories
$4,210 million in Walmart's favour

Accounts payable of $63,061M against inventories of $58,851M: the suppliers fund every item in every store and $4.2bn besides. Costco, a quarter of the size, runs $2,945M. If Walmart's ever turns negative, the suppliers have stopped funding the shelves.

Source: Moat Explorer calculation from the FY2026 Form 10-K ↗
⚠ Threats to the moat
⚠ THREAT 01
Scale Buys the Cost, Not the Price
A cost advantage spent on price leaves no margin cushion to fight with when a rival gets close.
References
  1. ReportedWalmart's accounts payable at 31 January 2026 were $63,061 million against inventories of $58,851 million.
    Walmart Form 10-K, fiscal year ended January 31, 2026 - consolidated financial statements and notes (total revenues $713,163M, net sales $706,413M, membership and other income $6,750M, cost of sales $535,395M, operating expenses $147,943M, operating income $29,825M, net income attributable to Walmart $21,893M, diluted EPS $2.73; balance sheet including inventories $58,851M, accounts payable $63,061M, property and equipment net $136,083M, accumulated depreciation $134,587M, depreciation and amortisation $14,203M; segment note; disaggregation of revenue by merchandise category and by market, and eCommerce net sales by segment) — FY2026 (ended January 31, 2026) · publ. March 13, 2026 · source ↗
  2. ReportedThe suppliers fund every item in every store and $4,210 million besides, which is why the company runs what it calls a working capital deficit — $22,600 million at the year end — and describes it as the efficient use of cash rather than a weakness.
    Walmart Form 10-K, fiscal year ended January 31, 2026 - Item 7 MD&A (Walmart U.S. comparable sales +4.3% with eCommerce contributing approximately 4.3 percentage points; return on assets 8.2% and return on investment 15.1% against 15.5%; net cash provided by operating activities $41,565M, payments for property and equipment $26,642M, free cash flow $14,923M against $12,660M and $15,120M; rent $2,434M; cash $10.7 billion and a $22.6 billion working capital deficit; membership income commentary) — FY2026 (ended January 31, 2026) · publ. March 13, 2026 · source ↗
  3. ReportedWalmart sells under Great Value, Equate, Mainstays, Ozark Trail, onn., Marketside, Freshness Guaranteed, bettergoods and a dozen more.
    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. Moat Explorer calcRead it through the gap between payables and inventories: $4,210 million in Walmart's favour in fiscal 2026.
    Moat Explorer calculation from figures in Walmart's own filings: global eCommerce of about $150.4 billion (Walmart U.S. $99.6B + International $35.8B + Sam's Club $15.0B) against $120.9 billion, a $29.5 billion increase against a $31,875M rise in net sales ($706,413M against $674,538M), about 92%; Walmart U.S. selling floor of 698.7 million square feet (633,724 + 36,609 + 28,375 thousand) and net sales per store of $104.7 million ($482,975M over 4,611 stores); operating margin 4.18% ($29,825M/$713,163M) against 4.31% ($27,012M/$648,125M); net margin 3.07%; gross profit rate 24.2% ($171,018M/$706,413M); grocery 59.1% of Walmart U.S. net sales ($285,482M/$482,975M) against 59.8% ($264,210M/$441,817M) and grocery growth of 3.4%; general merchandise to grocery ratio 0.40 against 0.43; health and wellness +26.7% ($54,898M to $69,547M); payables less inventories $4,210M ($63,061M less $58,851M); rent 0.34% of revenue ($2,434M/$713,163M); capital expenditure 64% of operating cash flow ($26,642M/$41,565M); a 1% overrun on $147,943M of expense is $1,479M; eCommerce penetration 27.5% international ($35.8B/$130,423M) and 20.6% at Walmart U.S. ($99.6B/$482,975M); shareholder returns $15,587M ($7,507M dividends plus $8,080M repurchases) against $14,923M of free cash flow; Q2 FY2027 net income attributable down 9.4% ($6,366M against $7,026M); Walmart U.S. comparable sales of about 3.9% excluding the 125 basis point pharmacy headwind — FY2024-Q2 FY2027 · publ. September 2026 · source ↗
  5. ReportedCostco, a quarter of the size, runs $2,945 million.
    Costco Form 10-K, fiscal year ended August 31, 2025 - consolidated financial statements and notes (income statement, balance sheet, Note 11 segment reporting, disaggregated revenue by merchandise category, legal proceedings) — FY2025 · publ. October 8, 2025 · source ↗
Sources
Generated September 22, 2026