They consider this growth essential to accommodate the complexity and global reach of their multinational corporate clients.
With their multinational clients becoming larger, all the firms involved in the recent merger negotiations see little choice.
The company currently services around 35,000 entities for its multinational clients with no single one accounting for more than 2% of group revenues.
Public relations executives say the size of a firm is important in attracting multinational clients.
We received a brief from one of our biggest multinational clients, who wanted us to find a suitable sales manager based in London.
Most were from previous power projects, he said, and many had been provided to him by his multinational clients.
Several of the nation's largest firms have consolidated resources to compete for multinational clients.
The company provides research on the risk of terrorism for 500 public and private multinational clients.
Many big firms say they need to be larger and have offices in cities throughout the world to serve their multinational clients better.
Over 50 percent of the firm's business is from overseas and multinational clients.