Saudi Aramco has priced its $12 billion offering in the company’s first international bond issuance, Pipeline Oil and Gas Magazine reported.

The offering is expected to be closed on April 16 and is subject to customary closing conditions.

The issuance is comprised of five tranches of senior unsecured notes, which have maturities ranging from three to 30 years.

The $12-billion issuance indicates huge investors’ interest in the Saudi oil giant debut offering, as it is expected to be become one of the most oversubscribed bond deals in history, according to Bloomberg.