The Am Law Daily reported last October on the Am Law 200 firms that saw the largest fluctuations in head count over the past year. On the heels of The American Lawyer’s recent Lateral Report, as well as the completion of several mergers and other mass attorney exoduses of note, we decided to pick up where we left off, crunching the Am Law 200 head count numbers from Oct. 1, 2014, through March 8 based on data compiled through ALM’s RivalEdge.

Below are the top six risers and fallers in head count by percentage change in the total numbers of lawyers on a given firm’s payroll. Economies of scale are an important factor—firms of smaller size are more likely to experience large percentage changes than global legal giants. Mergers, of course, also factor heavily into the head count calculus.

As was the case the last time we did this exercise, we focused solely on measuring total attorney head count. RivalEdge, an online “listening platform” acquired two years ago by our parent company ALM Media, monitors thousands of online news sources, law firm websites and social media to collect a variety of information, including the number of lawyers employed by a firm at any given time. Of course, not all data is perfect and there are ghosts in the machine. Scraping websites can yield false positives, or negatives.