Head count growth in Pennsylvania's largest firms is tracking national trends, driven by consolidation among small law firms and by bigger firms pushing to boost revenue with more lawyers.

Two large and two midsize firms made particular gains in head count over the past year, as shown by their rankings on the NLJ 500.

Fox Rothschild went from the 67th largest firm by head count to the 49th largest, with the addition of more than 100 lawyers. (The NLJ 500 list is based on estimates submitted early in 2017, which differ from the results Fox Rothschild reported to The Legal in April.)