Introduction
Even the largest food companies depend on a single customer to a degree few industrial companies would accept. General Mills reported that Walmart and its affiliates accounted for 22 percent of its consolidated net sales in fiscal 2025, and 31 percent of the sales of its North America Retail segment; Clorox put Walmart at 27% of its sales for the same year. For smaller brands, a single retailer can account for well over a third of revenue.
That customer concentration is the visible sign of a deeper imbalance. Shelf space is finite, the largest retailers reach most households, and every brand on the shelf competes with dozens of others and with the retailer's own label for the same few feet. Retailers use that position to extract payments for shelf access, set service standards and push for lower prices. For bankers, the balance of power between a brand and its customers is a central question in any consumer deal, because it decides how secure the brand's sales really are.
Why Retailers Hold the Power
A brand owner has products; a retailer has the shopper. Several features of the market tilt the negotiation toward the retailer:
- Finite shelf space: a supermarket carries tens of thousands of items, and every new product must displace an existing one.
- Retail consolidation: a handful of national chains, led by Walmart, control a large share of grocery and general merchandise sales.
- Store brands: retailers can replace a national brand with their own label, often made by a contract manufacturer.
- Data: retailers see every transaction across every brand in a category, while each supplier sees mainly its own.
- Category decisions: the retailer decides which products to stock, where to place them and how much space each gets.
The brand's counterweight is consumer pull. A product that shoppers will switch stores to find, such as a leading cereal, soft drink or diaper brand, gives its owner leverage, because a retailer that drops it risks losing the shopper's whole basket. The stronger the brand, the more the balance shifts back toward the supplier, a dynamic covered in the article on brand equity and pricing power.
Slotting, Shelf Space and Category Captains
The clearest form of retailer power is the payment a supplier makes simply to get onto the shelf, and the shelf placement it then has to keep earning.
- Slotting Allowance
A one-time payment a supplier makes to a retailer as a condition for the initial placement of a new product on the retailer's shelves or in its warehouse. Slotting allowances, also called slotting fees, are separate from ongoing promotional payments; payments to keep an existing product on the shelf are sometimes called pay-to-stay fees.
The Federal Trade Commission (FTC) studied slotting in five grocery categories and found that retailers and suppliers typically expect a new product to stay on the shelf for a "reasonable" trial of at least four to six months, and that paying the fee does not guarantee any particular shelf placement. Retailers justified the fees by the cost and risk of new products, citing failure rates of around 70%. The study also found that products delivered through direct store delivery were less likely to pay slotting fees, because the supplier does much of the stocking work itself, and that frozen and refrigerated products, where shelf space is scarcest, paid the most per item.
Shelf placement and planograms
Getting listed is only the start. Retailers lay out each aisle using a planogram, a diagram of which products go where and how many facings each receives. Eye-level shelves, end-of-aisle displays and checkout racks sell far more than bottom shelves, and suppliers compete for them through promotional funding and performance. A product that does not sell fast enough, measured by its sales velocity per store, loses facings or is delisted at the next category review, usually held once or twice a year. The promotional payments behind these placements are covered in the article on trade spend and gross-to-net.
Category captains
Many large retailers lean on their biggest suppliers for help managing a category.
- Category Captain
A supplier, usually the category leader, that a retailer appoints to analyze a product category and recommend its assortment, shelf layout, pricing and promotions, including for competitors' products. The arrangement gives the retailer free analytical support and gives the captain influence over the shelf, which raises competition concerns if the captain uses it to disadvantage rivals.
Category captaincy is a sign of a supplier's strength, but it comes with obligations. The captain must make recommendations that grow the whole category, not just its own brands, or the retailer will hand the role to a rival. Captaincy also matters in merger reviews: when two suppliers combine, regulators may ask whether the merged company's influence over shelf decisions could exclude smaller rivals, part of the analysis covered in the article on antitrust in consumer deals.
Selling to Walmart: Customer Concentration Risk
Walmart is the largest customer for most US consumer products companies, and selling to it means meeting demanding standards. Large suppliers keep dedicated customer teams near Walmart's headquarters in Bentonville, Arkansas, work from the sales data the retailer shares with its vendors and agree joint business plans for each year. Suppliers share data and plans with the retailer, follow strict logistics rules and absorb penalties when they miss them. Walmart's on-time, in-full program, for example, fines suppliers 3% of the value of each late or incomplete shipment, as Food Dive reported when the rules were introduced. The relationship also brings scale that no other customer can match, which is why suppliers accept the terms.
What concentration puts at risk
Heavy dependence on one customer exposes a brand to several risks:
- Delisting or lost space: a category review can cut a brand's facings or remove products altogether.
- Price pressure: a large customer can demand lower prices or more promotional support, and the brand has few alternatives.
- Private label substitution: the retailer can launch or expand its own label in the brand's category.
- Terms and penalties: payment terms, logistics fines and promotional obligations can change in the retailer's favor.
- Channel shifts: if the customer loses share to rivals, the brand's sales fall with it.
When concentration is less risky than it looks
Not all concentration is equal. A must-stock brand that is a category leader has a balanced relationship with its largest customer: the retailer needs it as much as it needs the retailer. The same share of sales can carry very different risk:
| Lower-risk concentration | Higher-risk concentration |
|---|---|
| Category leader shoppers expect to find | Brand easily replaced by a store brand |
| Sales spread across many categories at the customer | Growth from a single new listing |
| Served through the brand's own DSD network | Dependent on the retailer's warehouse and goodwill |
| Relationship built over decades | Account opened in the past two or three years |
| Meaningful presence in other channels | Few sales outside the main customer |
The substitutability of the product is usually the deciding factor. The alternatives open to a concentrated brand are mapped in the article on the consumer channel map.
How Bankers Assess Retailer Power
Customer concentration is one of the first items a buyer examines in any consumer deal, and sellers prepare for it. The usual analysis covers:
- Sales by customer over several years, with the trend in each major account's share.
- Contract and listing terms, including how long major items have been listed and how often categories are reviewed.
- Retailer scorecards on service levels, fines and promotional compliance.
- Share within each key account, using scanner data to show whether the brand is gaining or losing ground where it matters most.
- Exposure to private label in the brand's categories at its largest customers.
High concentration rarely stops a deal, but it shapes the price and the structure. Buyers apply lower multiples to brands that depend on one or two customers, ask for customer-related protections in the purchase agreement and focus their integration plans on securing the key relationships in the first months after closing. Where a buyer already sells to the same retailer, the combination can strengthen the relationship rather than weaken it, which is one reason strategic acquirers often see less concentration risk in a target than financial sponsors do. The retailer's own move into competing products is covered in the article on private label versus national brands.
