Santos, a major Australian natural gas company with interests in Papua New Guinea, said it received a proposal from Harbour Energy at 4.55 Australian dollars per share on August 14.
"The board rejected the approach on the basis that the indicative price was inadequate and the sources of funds were uncertain," Santos said in a statement to the stock market.
"Santos confirms that it is not currently engaged in discussions with, and has not received a current proposal from, Harbour Energy regarding a change of control transaction for Santos."
Shares in Santos closed 13.01 percent higher to Aus$4.95 in trading in Sydney Thursday.
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