The Worshipful Company of Stationers and Newspaper Makers adopted the Corps in March 1949. The Stationers' Trophy is awarded to the best trainee clerk or stores accountant who qualifies each year and the Cox Cup to the best student on IT/IS training courses each year at the Signal and Clerks Training Wing at the Commando Training Centre, Lympstone. The first colours to be presented to 45 Commando RM are laid up in Stationers' Hall.

The Honourable Company of Master Mariners adopted the City of London Royal Marine Forces Volunteer Reserve (now RMR) in 1953. His Royal Highness The Prince Philip, Duke of Edinburgh, Captain General Royal Marines, is a Warden of the Court of the Master Mariners. Since 1964 the Commandant General has been an Honorary Member of the Company during his appointment.

The Worshipful Company of Musicians present a silver medal annually, which is awarded to the best student in the Bandmasters' Class at the RM School of Music. Another silver medal and bronze medal, known as the Cassel Prizes, are awarded to the winner and runners-up in an annual competition for musicians under training at the RM School of Music.

The Worshipful Company of Armourers and Brasiers make an award to the best trainee armourer who qualifies each year in the Technical Training Company at Royal Marines Poole.

The Worshipful Company of Plaisterers in 1983 presented to the Corps a painting of SS Canberra during the landings at San Carlos. This painting is now in the Officers Mess at CTCRM, Lympstone. Since 1985 the Commandant General has been an Honorary Member of the Company during his appointment.