Research from data consultancy Morningstar shows that PwC has 367 stock market clients, and 42 of the FTSE 100 – almost double that of second-place KPMG.
However, KPMG has signed up three new FTSE 250 firms since August, including UK haulage giant Stobart Group.
Morningstar’s Professional Services Rankings Guide, which lists the top companies in the audit, financial adviser, PR, law, registrar and stockbroker sectors, also displayed a strong quarter from law firm Pinsent Masons and advisers FinnCap.
Pinsent Masons overtook Norton Rose to became the City’s third biggest lawyers in terms of clients, while FinnCap joined Numis as the joint fourth-biggest financial advisory firm.
FinnCap also became the most popular adviser for firms on London’s junior market, overtaking Cenkos Securities in terms of Aim-listed clients. It took Cenkos’s place at the top of the Aim broker list last month.
JP Morgan Cazenove remains the City’s most popular financial adviser and broker, while FTI Consulting has signed up seven new clients since August, retaining its position as the City’s favoured PR company, although Brunswick now represents 24 of the FTSE 100.
Registrars were boosted by an increase in Aim flotations over the last three months, with Capita remaining the most popular, although FTSE 100 leader Equiniti was hit by its loss of top client BP to Capita.