Oil and Natural Gas Corporation (ONGC) is India's largest oil and gas exploration and production company. It was established in 1956 and has grown significantly over the past 50+ years. ONGC currently accounts for over 80% of India's oil production and has evolved from enjoying a monopoly to facing increased competition and losing its regulatory role due to government reforms. The company has adapted its strategies and operations over time in response to changing market conditions and government priorities, such as pursuing acquisitions and adopting new technologies to address production declines.