Oracle president Safra Catz is to take on the additional responsibility of chief financial officer (CFO), with the expansion in his role effective immediately.
The move follows the resignation of the company's last CFO, Jeff Epstein, last week.
"Safta already has the long-standing confidence of our employees, our board and our shareholders," said Oracle CEO Larry Ellison.
"There is no more logical choice for CFO, as the CFO function has reported to Safra for a number of years and she's acted as Oracle's CFO in the past."
Epstein did not give Oracle a reason for resigning and had a low profile with investors, according to Reuters.
It was Catz who read the company's profit forecasts during the quarterly earnings conference calls.
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