Figuring out the number of Brussels-based lobbyists is indeed difficult. Taking the European Parliament as a first step, you have to go the European Parliament website (www.europarl.europa.eu), then click on Parliament, then click on In Detail, scroll down on the left-hand side column and you will see Accredited Lobbyists. You can search either by organisation or by name. You will see that there are currently 1,789 organisations that are registered and 2,821 individuals holding a Long-Term Access Pass.