More than 80 percent were in favour of the proposed transaction by ExxonMobil to acquire all outstanding shares of InterOil Corp announced last month, valued for more than $2.5 billion.
"I would like to thank our shareholders for their overwhelming support for this value-creating transaction," InterOil chairman Chris Finlayson said.
"This transaction delivers shareholders a material and immediate premium, a potential direct cash payment based on the Elk-Antelope resource certification and exposure to future value through ownership of ExxonMobil shares.