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: “The site describes itself as 'güvenle büyüyen global grup' operating in engineering, energy, aviation, foreign trade, real estate, petroleum, and tourism through subsidiary companies, with no mention of investing in external startups.”
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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