T'way Holdings minority shareholders have petitioned the Korea Exchange, the Financial Services Commission, and the Financial Supervisory Service to seek shareholder protections before majority owner Sono International proceeds with its planned initial public offering. The group argued that listing Sono International would create a "multi-layered listing structure" with T'way Holdings and t'way Air (TW, Daegu), raising concerns over duplicate listings, governance, and shareholder value. It asked regulators to require Sono International to disclose plans for T'way Holdings, any restructuring, and measures to protect minority shareholders during the listing review. T'way Holdings and t'way are already independently listed on the Korea Exchange.