Firstbanks adesola adeduntan joins global industry leaders at the annual fintech insure tech summit bulgaria

Here's a rewritten version of the sentence in a more formal and polished tone:

"FirstBank's Adesola Adeduntan, Group Head, Corporate Banking, joined esteemed global industry leaders at the annual Fintech & Insuretech Summit in Bulgaria, a premier event that brings together innovators and thought leaders in the fintech and insuretech sectors."

Let me know if you'd like me to make any further changes!