Group 1 - Tarsadia Capital, holding a 3.4% economic interest in Sunstone Hotel Investors, has urged the board to initiate a dual process for either selling the entire company or liquidating its assets to maximize shareholder value [1] - The letter emphasizes that Sunstone's current position as a subscale lodging REIT is unsustainable and calls for immediate changes in the board to explore strategic alternatives [1] - Tarsadia Capital has expressed frustration over the board's inaction regarding the company's persistent undervaluation in public markets and is prepared to advocate for change among fellow shareholders if necessary [1]