Orrick Herrington & Sutcliffe is merging with Washington, D.C.-founded Am Law 200 firm Buckley, adding significant strength to Orrick in financial regulation, enforcement and litigation and doubling its footprint in the nation’s capital.

The merger, expected to close by the end of January, is responding to a historic period of demand for regulatory guidance across financial services, technology and fintech. In fact, the combination is not unlike Davis Wright Tremaine’s merger with McGonigle last year.