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  3. /Tracking private label share and price gaps
Use case

How can you track whether private label is gaining ground on branded products?

Private label gains show up as retailers giving own-brand products more of the shelf and holding a steady or wider price gap to brands. Online data measures both: the share of listed products in a category that are private label, and the price-per-unit gap between private label and the leading brands, tracked weekly by retailer.

For:Public market investorsConsultantsPrivate equity

Last reviewed 24 September 2026

Two measures to watch

  • Private label share of listed products, by category and retailer.
  • Price gap: private label against the leading brands, normalized per unit.

Reading the signals

Brands raising prices faster than private label widen the gap, which tends to push price-sensitive shoppers toward own brands. Retailers adding private label listings in a category usually signal where they see margin opportunity. Watching both across several retailers shows whether a shift is retailer-specific or category-wide.

Metrics used

  • Private label share: The share of a retailer's assortment in a category made up of its own-brand (private label) products.
  • Price gap: The percentage difference between the price of one product or brand and a comparable alternative, such as branded versus private label.
  • Matched-SKU inflation: The price change of identical products observed in both periods, which isolates true price moves from changes in product mix.
  • Share of shelf (online): A brand's share of the products a retailer lists in a category, measured on the retailer's website.

How each measure is built: methodology.

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Data Purl

Data Purl turns public retailer websites into investment-grade data: SKU-level price, discount, availability and assortment history across 400+ retailers back to 2013, with brands resolved to their owners, public or private, and listed owners mapped to tickers.

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