NEWYORK, July 29 --United Co. Rusal demanded OAO GMK Norilsk Nickel disclose how American depositary receipt holders voted at a June 28 meeting, and offered to do the same, to end a battle for influence at the world's biggest nickel producer.

Rusal pledged to publish its ballots as long as Norilsk Norilsk reveals how ADR holders, including those affiliated with billionaire Vladimir Potanin and Norilsk management, voted for board members, according to a letter Rusal sent to Norilsk and dated today, a copy of which was obtained by Bloomberg News.

A feud between billionaire Oleg Deripaska's Rusal and Potanin's Interros Holding Co., which each own 25 percent of Norilsk, started in 2008 and reignited last month over the disputed board election, dragging the shares down 11 percent in the subsequent three days. The voting led Rusal-backed Chairman Alexander Voloshin to lose his seat on Norilsk's board.

The billionaires disagree on how to spend the cash Norilsk is likely to generate by 2012, with Deripaska wanting dividends and Potanin preferring buybacks, Russia's Alfa Bank said in a July 14 report.

Norilsk Nickel is ready to publish how its subsidiaries' voted, Maria Uvarova, spokeswoman for the company, said by phone. She said the company has received Rusal's letter.

"Publication of major shareholders' voting ballots will definitely make the voting results more transparent," Uvarova said. "We can't publish other shareholders' ballots without their consent."

Norilsk asked shareholders, including Interros, Rusal and the Bank of New York, the ADR depository bank, to allow it to publish 30,000 pages of ballots and supporting documents, according to a statement on its website yesterday.