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Former Flipkart employees are urging Walmart to pay out their vested stock options, demanding a buyout outside the company's impending IPO. In a letter to Walmart's board, ex-executives argue that linking employee liquidity solely to the IPO leaves them with no certainty when they can cash in their options. Thousands of former employees have signed a petition requesting inclusion in a proposed $2 billion ESOP buyback, with Walmart asked to hold discussions before deciding on terms.