Amazon has lost its latest attempt to block two major UK class actions worth up to £4 billion, intensifying scrutiny over alleged market dominance abuses.
The Court of Appeal refused the company permission to challenge earlier rulings allowing the lawsuits to proceed.
One claim, led by competition law academic Andreas Stephan, represents more than 200,000 third-party retailers and is valued at up to £2.7 billion.
Lawyers allege Amazon manipulated its “Buy Box” system to favour its own products and sellers using its logistics and delivery services.
A separate £1.3 billion case, filed by consumer advocate Robert Hammond, represents millions of UK customers over similar allegations.
Both claims argue Amazon leveraged its dominant market position to distort competition and disadvantage independent sellers and consumers.
The Competition Appeal Tribunal certified the cases last year on an opt-out basis, automatically including eligible claimants unless they withdraw.
Amazon maintains the claims lack merit and previously challenged the economic methodology underpinning them. The company did not immediately comment on the ruling.
