Costco Pledged Fuller Cash-Flow Explanations After SEC Push
Costco promised to explain how inventory turnover and supplier terms affected cash generation after SEC staff sought more detail on changes in operating cash flow.
Costco Wholesale (COST) agreed to explain the business reasons behind changes in operating cash flow after SEC staff pressed for more detail on working capital. The company’s proposed disclosure tied stronger cash generation to higher operating income and reduced investment in merchandise inventories, attributing the inventory improvement to faster turnover and better supplier payment terms.
The SEC’s request went beyond a comparison of annual totals. Staff sought explanations in annual and interim reports of the underlying reasons and implications of material cash-flow changes, giving investors a basis for understanding variability and potential trends. Costco committed in March 2026 to expand its discussion; that response became public in September.
Costco’s proposed wording explained that its net investment in merchandise inventories was the difference between inventory and accounts payable. Inventory levels, turnover, supplier payment terms and early payments to obtain discounts could all affect that balance. For fiscal 2025, Costco identified faster inventory turns and improved payment terms as reasons less cash was tied up in merchandise on that net basis. The added explanation would help readers separate cash generated through operating income from cash freed through inventory and supplier-payment arrangements.
Staff also pressed Costco to explain how its chief operating decision maker used operating income to evaluate performance and allocate resources. Costco promised language describing how management used performance measures alongside internal reports to compare actual results with budgets and the prior year, then make strategic and operational resource decisions. That commitment concerned the explanation of management’s decisions; Costco proposed no change to its segment structure in the response.
The earlier exchange had addressed a similar need for specificity in sales and expenses. In April 2025, Costco agreed to quantify material drivers after staff questioned explanations involving comparable sales, new warehouses, an extra reporting week and wage increases. Its illustrative revision assigned percentage contributions to comparable sales and new warehouses and estimated the effect of one fewer week. Costco said price changes were immaterial for that period except for gasoline, whose price and volume effects it had described.
Membership disclosures required a different clarification: what the measures actually counted. Costco explained that its renewal calculation excluded memberships expiring in the most recent six months, allowing time for late renewals. It also defended including recently expired memberships in membership counts to capture a full annual renewal cycle, and promised to label the membership totals clearly as year-end snapshots. The response described the existing methodology without proposing a change to it.
Staff separately sought the size, direct costs and revenue classification of Costco’s Citibank credit-card arrangement. Costco explained that its contributions toward cardholder rebates were reflected within revenue and that agreement revenue sat within Warehouse Ancillary and Other Businesses. The amounts were withheld from the public response under a confidential-treatment request, limiting what readers could assess about the arrangement’s contribution.
Costco’s latest commitments concerned future disclosure, leaving implementation and staff acceptance unconfirmed. The practical advance was a promised explanation of why cash generation changed, including how quickly Costco sold merchandise and when it paid suppliers.
Source: Costco Wholesale correspondence with SEC staff dated March 23, 2026, and April 21, 2025.