Washingtonian Magazine featured Arnold & Porter partners Cara Koss and Thomas Richardson, as well as associate Coryn Rosenstock, in their 2025 "Top Financial Adviser" list. The list includes financial planners, tax accountants, insurance specialists, and other financial professionals whom the magazine describes as "some of the top money advisers in the Washington area." To compile the list, Washingtonian surveys legal and financial professionals in the D.C. metropolitan area.
Koss is nationally recognized for her cutting-edge expertise in assisted reproductive technology (ART) and estate planning. She focuses her practice on advising high net worth individuals, both domestically and internationally, on a wide range of sophisticated matters including estate planning, trust and estate administration, lifetime gifting, family office formation and counseling, asset protection, business succession planning, and tax compliance. Richardson, who is described by clients as one of the industry's top professionals, advises on a range of wealth planning matters, including estate planning, estate and trust administration, representation of family businesses, tax controversies involving the Internal Revenue Service and local tax authorities, and fiduciary litigation. Rosenstock advises high net worth individuals on estate planning, estate and trust administration, estate and gift taxation, business succession and tax compliance, and generational wealth transfer at all stages.