The firm won a total of seven new clients in the industrial, consumer goods and services, technology and oil and gas sectors with three new clients won in the latter.
New additions include biopharmaceuticals company Valirx Plc and Latin American power company Rurelec Plc.
Pinsent Masons’ corporate partner and capital markets specialist, Sean Page, said:
"Our AIM expertise has enabled us to dominate the rankings for some time. It's good to see that we continue to secure new clients both domestic and international despite challenging market conditions.
"Our capital markets practice is based around our sector-led proposition and breadth of coverage – maintaining our number one AIM ranking also being ranked second for all quoted clients is a testament to this approach."
Earlier this year, the firm capitalised on its experience in both the main and junior markets advising AIM-quoted manufacturer Tyman Plc on its $200 million acquisition of Truth Hardware moving up to the London Stock Exchange (LSE) main market.