The downturn in the oil commodity price starting in 2014 had a chilling effect on oil and gas M&A. However, recent price stabilisation has improved the outlook for M&A activity, making a second edition of this book most timely.A feature of the M&A industry has always been its variety of participants, ranging from integrated energy conglomerates to entrepreneurial frontier explorers. New entrants include state-owned oil companies, financial investors, diversifying service contractors and oil traders. With the growth of specialist stock markets, junior and independent oil companies are better able to raise acquisition finance than ever before, and companies specialising in end-of-life reservoirs are filling the spaces left as oil majors go in search of new opportunities. Transaction types are also diverse and are completed using a variety of different deal structures. As well as providing chapters on each type of acquisition method, this book also includes an analysis of the underlying structuring decisions.In addition, this practical guide covers a number of ancillary areas, including valuations, financing, tax and accounting. Decommissioning liability is also considered in an M&A context. A number of new chapters are also featured, covering topics such as competition law, environmental law and dealing with material adverse changes. This comprehensive new edition will prove an essential resource to anyone involved in the upstream industry M&A process including lawyers, bankers, financiers, business executives, accountants and tax advisers.