Among the illustrious roster of Maharatna companies are titans such as Indian Oil Corporation Limited (IOCL), Oil and Natural Gas Corporation (ONGC), and Bharat Heavy Electricals Limited (BHEL). These entities not only command significant market shares in their respective industries but also play pivotal roles in driving India's economic engine. Their contributions span from meeting the country's energy demands to spearheading technological advancements, thereby fueling progress and development on a massive scale.