
The Amazon Marketplace in 2026: 165,000 New Sellers, 800k+ Brands, and What Consolidation Means for You
New seller registrations hit a decade low in 2025 — down 73% from the 2021 peak. Meanwhile, fewer than 8,000 sellers drive half of all US third-party GMV. The Amazon marketplace is hardening into two tiers, and the revenue concentration data tells you exactly what that means for how you need to operate.








