Amazon Business has reached $60 billion in annualized gross sales, a scale milestone that positions the marketplace as the largest single channel of its kind in U.S. B2B ecommerce and reshapes the negotiating baseline for every wholesaler, supplier and buying group competing for share of corporate purchasing.

The figure, reported by MarketScale, frames the next leg of competition as the "agentic era" — a term the outlet uses to describe purchasing decisions increasingly routed through software agents, programmatic catalogs and AI-driven requisition tools rather than human buyers clicking through a punchout site. If even a small share of the $60B base migrates to autonomous transactions, the velocity at which listings turn over, the data Amazon captures per transaction, and the margin pressure on traditional distribution intensify simultaneously.

What $60B changes for the channel stack

The headline number does three things at once for distributors and brand manufacturers:

• It lifts Amazon from a supplementary channel to a default procurement destination in categories where the platform has earned contract vehicle status with larger employers.
• It forces every competing wholesaler to defend or grow net new accounts before their installed base routes routine replenishment through Amazon Business search and Amazon Business Prime shipping.
• It concentrates category-level pricing transparency in a single venue, compressing the spread between list and transactional pricing that historically funded distributor gross margin.

How the agentic layer compounds the pressure

The "agentic" framing matters more than the dollar figure alone. When a buyer's procurement system acts as the agent — parsing SKUs, comparing total landed cost, and executing orders without human review — Amazon's catalog depth, structured data, and integration footprint (Coupa, SAP Ariba, Workday connections) become the default advantage. Wholesalers without equivalent machine-readable catalogs face a structural disadvantage before a sales call is made. Gross margin impact is twofold: lower-cost routine transactions move to the platform, while the remaining human-led purchases concentrate in higher-touch, higher-margin categories where distributor relationships still matter.

What remains unverified

The $60B figure is reported as annualized rather than trailing-twelve-month actuals, a distinction that affects how readers should compare it against publicly traded distributors' B2B segments. MarketScale did not disclose Amazon's net revenue mix, take rate, or the share of gross sales coming from third-party sellers vs. first-party inventory — the data points that would translate marketplace scale into channel-power and customer-economics terms for the wholesale trade.

What to watch next

Expect the next reporting cycle to focus on whether competitors (Grainger, HD Supply, Ferguson, MSC Industrial, and the electrical and plumbing distributor cohort) disclose B2B digital share gains — or losses — in their earnings calls, and whether supplier brands expand or restrict authorized Amazon Business listings in response to the agentic purchasing trajectory reported by MarketScale.