The European Court of Justice (ECJ) has delivered significant setbacks to two of the world's largest technology firms in separate landmark cases. On Tuesday, the court upheld a 2016 European Commission order for Apple to pay 13 billion euros in back taxes to Ireland, concluding a long-running legal battle over the company’s tax arrangements. Simultaneously, the court dismissed Google's appeal against a 2.4 billion euro antitrust fine regarding its comparison shopping service. The rulings represent a major victory for EU competition regulators who have spent years seeking to curb the influence of Big Tech. Apple expressed disappointment with the decision, stating that the case was more about which government receives taxes rather than whether taxes were paid. Meanwhile, Google noted it has already made changes to comply with the 2017 ruling. Analysts suggest these decisions reinforce the European Union's regulatory authority as it prepares to enforce the new Digital Markets Act.