Shift4 is evolving into a niche, vertically integrated payments monopoly post-Global Blue acquisition, with market synergies not yet priced in. FOUR's acquisition of Global Blue brings dominant VAT refund infrastructure, high-margin DCC, and access to 70,000+ European merchants, driving revenue and margin expansion. Hardware consolidation via Shift4 One POS could materially boost Global Blue's TFS success ratio, unlocking €80M+ incremental revenue and €32M EBITDA with minimal incremental cost.









