In 2011, Rinehart's daughter, Hope Rinehart Welker, commenced a commercial action in the New South Wales Supreme Court for reasons understood to be related to the conduct of the trustee. The action sought to remove Rinehart as sole trustee. Her brother, John, and sister, Bianca, were later revealed as parties to the dispute.
In an agreement reached between the parties, the Court granted an interim non-publication order in September 2011. In making the interim order, Justice Paul Brereton stated: "This is not the first occasion of discord in the family, which has immense wealth, no small part of which resides in the trust. In the past, the affairs of the family, including such discord, has attracted considerable publicity in the media." Then, in a judgement handed down on 7 October 2011, Justice Brereton stated that he intended to dismiss an application by Rinehart, that there be a stay on court action, and that the family be directed into mediation. In December 2011, three justices of the NSW Court of Appeal lifted the suppression orders on the case. However, a stay was granted until 3 February 2012 and extended by the High Court of Australia until 9 March 2012. Rinehart's application for suppression was supported by Ginia Rinehart, but was opposed by Hope, John and Bianca. A subsequent application by Rinehart for a non-publication order on the grounds of fear of personal and family safety was dismissed by the NSW Supreme Court on 2 February 2012. In March 2012, when the suppression order was lifted, it was revealed that Rinehart had delayed the vesting date of the trust, which had prompted the court action by her three older children.
In June 2011, Citigroup estimated that she was on course to overtake Carlos Slim, the Mexican magnate worth US$74 billion and Bill Gates, who is worth US$56 billion, mainly because she owns her companies outright. Using a price-to-earnings ratio of 11:1 that applied at that time to her business partner, Rio Tinto, the Australian internet business news service, SmartCompany, stated: "It is possible to see Rinehart's portfolio of coal and iron ore production spinning off annual profits approaching US$10 billion", giving her a "personal net worth valuation of more than US$100 billion".