I broke out my “researcher” cap and started delving through the LinkedIn Groups page to see how many of the top 100 law firms had some type of Alumni or Employee LinkedIn Group. I found that 35 firms out of the top 100 had a LinkedIn Group page. Most of them were Alumni groups, but there were a few that had current employee groups along with the Alumni, or specific groups just for employees. And, a few were apparently rogue employees that created a group at some point, but never did anything with the group after it was created.
His post includes two charts. In the first, he lists the 35 firms, the number of LinkedIn members, and the type of group. In the second, he breaks down the number of LinkedIn profiles linked to the firm, the number of those profiles that are attorneys, the median age, and the number of males and females.
By the way, the group that had the most members: Skadden Alumni.