Amazon Prime Day 2026 ran June 22-25 across all 22 Amazon markets, with Adobe Analytics projecting $26.3B in four-day total spend. For the first time, mobile accounted for more than half of all purchases — 51.2%. All six major EU markets — UK, Germany, France, Netherlands, Spain and Italy — participated in the full four-day event.

The June timing is new. Amazon pulled Prime Day forward from its traditional July slot this year, a signal that the event is becoming a permanent mid-year fixture rather than a summer promotion. For brands planning EU market participation, this creates a more defined planning cycle between the mid-year commercial event and Q4 peak season.

Q4 EU inventory needs to be in position by September. Prime Day performance data is now available in late June. That gives brands a realistic 60-90 days to assess EU market demand signals and act on fulfilment positioning before peak season begins. Brands that wait until October to finalize EU logistics arrangements are building the operation while demand is already building.

The mobile-first crossing is also commercially relevant. At 51.2%, more than half of Prime Day purchases came through mobile devices. EU consumers on Amazon UK, Germany and France are shopping through the same mobile-first behaviour. Localized EU storefronts optimized for mobile checkout are increasingly the baseline expectation, not a differentiator.

• $26.3B projected total spend — Day 1 reached $8.3B in US consumer spend alone (Adobe Analytics)
• 51.2% of purchases via mobile — the first majority-mobile Prime Day on record (Numerator)
• All 22 Amazon markets active, including UK, Germany, France, Netherlands, Spain and Italy
• June timing creates a 60-90 day window between Prime Day data and Q4 EU inventory positioning

The EU demand signal is confirmed. The question for Q4 is whether in-market EU stock is in position when that demand converts in November and December.