Holland & Knight in talks to merge with Dallas-based Thompson & Knight 12 April 2021 Deal with tentative summer closing date would be largest US merger since Covid-19 struck Dallas Shutterstock Am Law top 40 national US firm Holland & Knight is in merger talks with Dallas-based energy specialist Thompson & Knight in what would be the largest US merger since the onset of the Covid-19 pandemic. A deal would add Thompson & Knight’s 300 lawyers to Holland & Knight’s roster to create a firm with nearly 1,600 lawyers across 30 offices. The two firms issued a statement on Friday (9 April) which said they were in the process of completing their due diligence in connection with the transaction and expect to complete the process in the next 90 days, with a tentative closing date set for the summer.