No observed cheques in the sources we track. That is a limit of our coverage, not a finding about this organisation.
From their own site: “AdrionBAN is a Business Angels Network of high added-value and confidentiality It consists of more than 70 Business Angels from South-East Europe, who are willing to invest in innovative Startups and SMEs mainly in Greece.”
An announcement gives the size of the round, not the size of this investor's cheque. The only rounds that imply a cheque are those where they were the sole named investor.
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