( October 18, 2024, 8:50 AM EDT) -- WILMINGTON, Del. — Instances where a director acts in the interests of a parent while sitting on the board of a subsidiary require a different standard because in such cases, there would be no paper trail evidence of an effort to provide profits only for the parent, a woman leading a shareholder derivative action says in asking the Delaware Supreme Court to revive a case alleging that a parent company directed T-Mobile US Inc. to centralize data for an artificial intelligence project, leaving the latter susceptible to cyberattack. But in an answering brief, the appellees tell the court that the woman’s appeal was full of challenges she didn’t raise below and therefore had waived and that even on the merits, she could not show that the parent company alone would have profited from the data-sharing program....