To sell your private limited company, prepare your financial and compliance documents, determine a fair valuation based on both assets and your strategic vendor status, and find a buyer through a professional advisor or business network. You must execute a formal Share Purchase Agreement (SPA) and file Form SH-4 with the Registrar of Companies to legally transfer ownership, while ensuring that any "change in control" clauses in your contracts with ACC and Ambuja Cement are properly addressed.