It is also the major fuel supplier to aviation, railways, power projects, and armed forces in the country.

[13] After PSO's inception, the corporate culture underwent a comprehensive renewal program which was fully implemented in 2004.

This program over the years included the revamping of the organizational architecture, rationalization of staff, employee empowerment and transparency in decision making through cross functional teams.

This new corporate renewal program has divided the company's major operations into independent activities supported by legal, financial, informative and other services.

[9] It was founded on December 30, 1976,[7] after Pakistan's government took over the management of Pakistan National Oil (PNO) and Dawood Petroleum Limited, Esso Eastern and renamed into POCL (Premier Oil Company Limited) for marketing of Petroleum Products.

This move establishes PSO as the only oil marketing company in Pakistan to extend its services to Gilgit-Baltistan region.

In 2024, PSO proposed swapping debt for stake in public sector companies including Pakistan International Airlines.

Cerisma Limited: A fully owned subsidiary of PSO involved in electronic money institution (EMI) and is located in Sindh, Pakistan.

[5] In May 2024, CEO and Managing Director of PSO Syed Muhammad Taha announced that PSO, the state owned oil distributor was also a part of the broader settlement framework to privatize the national flag carrier Pakistan International Airlines.