In June the company was valued at $1bn globally, marking the first time an internet company has reached that mark since 2000.
The last half of 2008 saw a substantial increase in global membership sign up, growing from 23m to 32m.
Interest from members in the financial sector grew 50% over the past six months. LinkedIn is currently growing at a rate of half a million new members a week.
Most recently the company announced it was stepping up European development with the launch of its French language platform, after the launch of its Spanish version in July.