Allens has topped the Thomson Reuters 2016 M&A league table for both Australia and New Zealand.
The law firm was ranked number one by value for both announced and completed deals for the 12 months of 2016 in the league tables.
The firm acted on transactions with a value of approximately US$51 billion during the period.
Meanwhile, Herbert Smith Freehills was ranked second in Australia, a holdover from its post last year.
Guy Alexander, Allens Corporate Practice head, said 2016 had been a strong year particularly compared to 2015.
“We have worked on some great deals over the year, such as the Asciano transaction; the Ausgrid sale by the NSW Government; and the Port of Melbourne sale,” he said.
“We have also seen an uptick in activity post the US election, and there is a good pipeline of work for 2017. Some sectors to watch in 2017 include health, infrastructure, financial services and oil & gas,” he added.
Earlier this month, another legal veteran, Herbert Smith Freehills partner Philippa Stone, said that the equity capital markets is expected to be stronger this year due to uncertainty waning after the US presidential election.