On Tuesday, Apple's lawyers filed a motion asking the court to let it secretly object [PDF] to the Chapter 11 Bankruptcy proceedings of GT Advanced Technologies (GTAT), a company that had partnered with Apple to manufacture sapphire components like camera lenses and TouchID buttons. Apple told the court that it had numerous confidentiality agreements with GTAT and that it needed its objection to be sealed to protect those agreements.

“Apple seeks to file under seal the Objection in order to protect the confidential commercial information contained therein and to comply with the terms of its confidentiality agreements with GTAT,” Apple's lawyers wrote.

The company only vaguely hinted at what it would take issue with in GTAT's bankruptcy filing. “The bases for the Objection involve confidential research, development, or commercial information regarding Apple’s business processes,” the motion read.

Industry watchers long expected GTAT to eventually produce sapphire screens for Apple's mobile devices, as sapphire is much harder and more scratch-resistant than glass. But GT's leadership threw industry watchers for a loop in early October when it suddenly filed for bankruptcy, a few weeks after Apple announced its iPhone 6 and 6 Plus, which are both made with the traditional Corning Gorilla Glass screens.

Late last week, GTAT went so far as to ask the court to let it terminate its contract with Apple early and close the Arizona sapphire manufacturing plant that Apple helped build. In a filing [PDF], GTAT claimed that the terms of its contract with Apple were "oppressive and burdensome."

In addition to the bad blood that seems to be growing between the two companies, stock sales made by GTAT's leadership have drawn some unwelcome interest. A day after GTAT filed for Chapter 11 bankruptcy, The Wall Street Journal discovered that the CEO of GTAT, Thomas Gutierrez, had sold more than $10 million in stock since February of 2014, including 9,000 shares, worth about $160,000, the day before Apple's iPhone 6 announcement. Today, The Wall Street Journal reported that the sapphire company's COO, Daniel Squiller, “sold $1.2 million of stock in May and set up a plan under which he sold another $750,000 of shares over ensuing months before the company filed for bankruptcy.”