Premier Oil plc was a London‐based independent oil and gas exploration and production company listed on the OTC markets under the symbol PMOIY. The firm focused on upstream operations, engaging in seismic surveying, drilling, appraisal and development activities to discover and commercialize hydrocarbon reserves. Its asset portfolio spanned mature fields and growth prospects, targeting both oil and natural gas resources.
The company’s core business activities included exploration in frontier basins and production from established fields. In the UK North Sea, Premier held interests in several platforms and subsea developments, while its Southeast Asia division operated offshore Malaysia, where it produced gas for domestic and regional markets. Additional operations in the Mediterranean and the Asia-Pacific region further diversified its production profile.
Founded in 1934, Premier Oil evolved from a small concession holder into a diversified upstream energy company. Over its history, it pursued strategic acquisitions, farm‐in agreements and joint ventures to bolster reserves and extend field life. The firm’s technical teams emphasized cost efficiency and reserve replacement, delivering sustained cash flow from long‐life assets alongside high‐impact exploration prospects.
Governed by an experienced board of directors and an executive leadership team with deep industry backgrounds, Premier Oil balanced disciplined capital allocation with growth ambitions. In July 2021, Premier Oil completed its merger with Chrysaor Holdings to form Harbour Energy, creating one of London’s largest independent oil and gas producers by reserves and reinforcing its global operating footprint.
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