The international relief charity said the companies' tax practices undermine the public's interest in a fair tax system — especially in Global South countries "with the greatest tax revenue needs." "Exxon, Chevron, and ConocoPhillips's threadbare tax disclosures leave investors, watchdog groups, and the general public in the dark about the companies' secretive tax practices," Daniel Mulé, policy lead on extractive industries and tax at Oxfam America, said in a statement. ConocoPhillips confirmed it had received a shareholder proposal from Oxfam and would review it ahead of its annual general meeting in May next year.