On November 26, 2025, TSMC filed a lawsuit against its former senior executive Lo Wei-jen, accusing him of violating confidentiality and noncompete agreements by allegedly sharing trade secrets with Intel. The information in question reportedly relates to TSMC's advanced chip processes, including 2-nanometer technology, which are critical to the company's future competitiveness. This legal action follows a recent investigation by Taiwanese prosecutors and comes amid heightened industry scrutiny over intellectual property protection. TSMC shares closed at $289.96 (+1.85%) on November 26, 2025, with no direct evidence linking the price movement to the lawsuit, but the event is significant given the potential business impact.