Cnergyico PK Limited is Pakistan's largest vertically integrated oil refining company, with a refining capacity of 156,000 barrels per day. Founded in 1995 and headquartered in Karachi, the company specializes in oil refining, petroleum marketing, and logistics throughout the country.

Cnergyico's product range includes various refined petroleum products such as gasoline, high-speed diesel, jet fuel, and lubricants. The company operates a significant refining complex near Hub in Balochistan, which includes two oil refining units and extensive storage facilities. In addition to refining, Cnergyico has a robust retail network with over 475 petrol pumps nationwide, aiming to expand further by acquiring additional assets.

The company, formerly known as Byco Petroleum Pakistan Limited, emphasizes sustainable practices and aims to enhance Pakistan's energy self-sufficiency. Cnergyico is committed to high environmental, health, and safety standards while contributing to the national economy.