Haynes and Boone Adds London Boutique to Its Fold

One week after Britons voted to withdraw from the EU, Haynes and Boone announced on Thursday it is merging with Curtis Davis Garrard, a 20-lawyer boutique in London.

Both firm’s partners have voted to approve the deal, but it still requires approval from the Solicitors Regulation Authority. If completed, it would create a 600-lawyer firm and expand Hayne and Boone from 12 offices in the U.S., plus Mexico and Shanghai and into London.

Haynes and Boone Managing Partner Tim Powers announced the merger on Thursday, and said the firms started working on the deal in November 2015. Both have a strong focus on the energy ...