By Jonathan Stempel
NEW YORK, Jan 23 (Reuters) - The top U.S. securities regulator on Tuesday rejected arguments by Rio Tinto Plc and two former top executives that its civil lawsuit claiming they concealed the plunging value of coal assets owned by the big Anglo-Australian mining company should be dismissed.
In letters filed with the U.S. District Court in Manhattan, the Securities and Exchange Commission said its complaint adequately alleged that fraud occurred, and that Rio Tinto, former Chief Executive Thomas Albanese and former Chief Financial Officer Guy Elliott intended to deceive investors.
Rio Tinto responded by referring to its statement in October that it believed the lawsuit was unwarranted and that a court or jury would reject the SEC's claims. Lawyers for the defendants did not immediately respond to requests for comment or had no immediate comment.
The SEC accused Rio Tinto of ignoring the need to write down most of the value of Mozambique coal assets it had bought for $3.7 billion in April 2011, while it was raising roughly $5.5 billion from U.S. investors.
Rio Tinto wrote off most of the value in January 2013, and sold the assets in late 2014 for just $50 million.
"This is not simply a case about Rio Tinto's valuation of Rio Tinto Coal Mozambique," the SEC said in one of Tuesday's letters.
"Rio Tinto, Albanese, and Elliott faced enormous pressure to structure a successful deal in light of the fact that they were responsible for an earlier disastrous multibillion dollar acquisition," the SEC said.
The SEC also rejected Rio Tinto's contention that any alleged misstatements and omissions might be immaterial because the writedown was for only 3 percent of company assets.
It said that had Rio Tinto properly written down the assets, its net earnings for the first half of 2012 would have been reduced by more than 50 percent.
"Accordingly, the question of materiality must be decided by a jury," the SEC said.
In letters on Jan. 16 explaining why the lawsuit should be dismissed, Albanese said he acted at all times as a "reasonable" CEO would, and Elliott said he relied on a "well-tested and rigorous process" to ensure that Rio Tinto reported its financials properly. The SEC case is being overseen by U.S. District Judge Analisa Torres. It is unclear when she will rule on defense motions to dismiss it.
(Reporting by Jonathan Stempel in New York; Additional reporting by Sonali Paul in Melbourne; Editing by Richard Chang)
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