RBC Capital Markets emerged as the leading mergers and acquisitions (M&A) financial adviser in the oil and gas (O&G) sector for the first half of 2025 (H1 2025) in terms of both the value and volume of deals, according to data and analytics company GlobalData's latest financial advisers league table.

According to GlobalData's Deals Database, RBC Capital Markets secured the top position by advising on 11 deals collectively worth $24bn.

Lead Analyst at GlobalData Aurojyoti Bose said: “There was an improvement in the total number of deals advised by RBC Capital Markets in H1 2025 compared to H1 2024, and its ranking by volume also improved from the third position in H1 2024 to the top position in H1 2025. In fact, it was the only adviser to hit triple-digit deal volume during the review period.

“Meanwhile, there was a decline in the value of deals advised by RBC Capital Markets, but despite that, not only did it register an improvement in its ranking by value but also managed to top the chart by this metric in H1 2025. It is noteworthy that six of the top ten advisers by value experienced a decline in H1 2025 compared to H1 2024.”

Jefferies took second spot in terms of deal value, advising on transactions amounting to $19.7bn.

BMO Capital Markets followed closely with deals valued at $18.8bn, while Barclays and Evercore each advised on deals worth $18.2bn.

In terms of deal volume, Evercore claimed second place with eight deals, while Jefferies, Mizuho Financial Group and JP Morgan advised on seven deals each.

GlobalData’s league tables are based on the real-time tracking of thousands of company websites, advisory company websites and other reliable sources available on the secondary domain. A dedicated team of analysts monitors all these sources to gather in-depth details for each deal, including adviser names.   

To ensure further robustness to the data, the company also seeks submissions of deals from leading advisers.