NEW YORK (TheStreet) -- Shares of GT Advanced Technologies  (GTAT)  fell 4.85% to $1.05 in morning trading Thursday after Apple's  (AAPL) sapphire supplier said it wanted to keep details of problems between GT and the tech giant secret from the public.

GT cited a risk that it would have to pay $50 million in damages "under certain confidentiality agreements involving a third party, which agreements themselves are required to be kept confidential," according to a motion filed in the United States Bankruptcy Court, District of New Hampshire on Thursday morning.

GT Advanced will appear before a judge in the court Thursday morning.

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More than 22 million GT shares had changed hands as of 9:59 a.m., slightly greater than the average volume of 21,298,900.

GTAT Chart GTAT data by YCharts

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