The Duke and Duchess of Cambridge have set up firms to protect their "intellectual property rights", Kensington Palace has said.
In a move often associated with celebrities, the royal couple have established companies in each of their names - with William founding APL Anglesey and Kate setting up CE Strathearn.
According to the Daily Mail, it will enable the pair to sell officially-endorsed products and take action against anyone selling items that could harm their image.
But a Kensington Palace spokesman said the companies remained dormant after being formed more than a year ago and "are not intended to be used as trading arms".
Prince Harry has also founded a company, Tsessebe - the name of an African antelope, the spokesman said.
The Duke's company is named after his middle names Arthur Philip Louis and the Welsh island where he and Kate lived after they married, the Mail said.
Meanwhile, the Duchess's company title is reportedly from her names Catherine and Elizabeth and the Countess of Strathearn Scottish title awarded by the Queen.