The document describes the methodology used to identify India's 100 most profitable companies. Several filters were applied, including a market capitalization over 500 crore, a 10-year profit record, average return on equity over 15%, consistent profit growth over 8% for 6 of the last 10 years, positive cash flows for 8 of the last 10 years, and debt-to-equity ratio below 2 for most years. Only 90 companies met all the criteria due to pandemic impacts. The final ranking considered weighted average profit growth, return on equity, and consistency of profit growth.