Estonia's hidden conglomerates – clusters of legal entities under a single VAT payer, ranked by combined revenue.
A VAT group = companies sitting under one VAT payer (same EE… number) in the Tax Board's register. 121 such groups exist in Estonia, the largest holding dozens of legal entities. The combined-revenue total sums each member's MTA-declared quarterly revenue for the 2026 Q1–Q3 period (refreshes quarterly when MTA publishes the next slice). 'Flagship' = the member with the largest revenue.