William A. Stock

William A. Stock

Klasko Immigration Law Partners, LLP

1601 Market Street
Suite 2600
Philadelphia, PA 19103
Phone: (215) 825-8607
Fax: (215) 825-8699


Additional Office:
31 West 34th Street
8th Floor
New York, NY 10001
Phone: (212) 796-8840
Fax: (212) 798-8859

William A. Stock’s Story

William A. Stock (Bill) is one of the country’s leading immigration lawyers. A founding member of Klasko Immigration Law Partners, LLP, he has practiced immigration law exclusively for over twenty years. His clients include small businesses, medium sized companies, and multinational corporations and their employees, as well as individual clients, investors and researchers.

Bill leads a team of thirty-two attorneys, senior and junior paralegals in obtaining employment-based immigration benefits for clients, such as nonimmigrant visa classification (H-1B, L-1, E-1 and E-2, TN and O-1); permanent residence or “green card” status through Labor Certification or as immigrants of Exceptional or Extraordinary Ability (EB-1, EB-2 and EB-3); investment-based immigration (EB-5); and unusual or complicated matters such as physician J-1 waivers, visas for entrepreneurs, and mandamus or APA review actions brought in federal court.

Bill served as President of the American Immigration Lawyers Association (AILA), the 16,000 member national organization of immigration lawyers in 2017. He has long been active in the association on both a national and state level and has served several terms on the Association’s Board of Governors. In 2000, he received the Association’s Joseph Minsky Award for outstanding accomplishments in immigration law.

Bill is a Senior Editor of AILA’s annual Immigration & Nationality Law Handbook, and is the co-author of the “J Visa Guidebook” from Lexis Publishing. He was an Adjunct Professor at the Villanova University School of Law. He has been included since 2004 in Best Lawyers in America (Woodward/ White Inc.); since 2006 in Chambers Global: The World’s Leading Lawyers for Business (Chambers and Partners), Who’s Who in American Law, and The International Who’s Who of Business Lawyers. Bill is also featured as a 20 top practitioner in the area of Immigration Law by Lawdragon.

A summa cum laude graduate of the University of St. Thomas (St. Paul, MN), (B.A.1990), he received his law degree from the University of Minnesota (J.D., magna cum laude, 1993) where he was a member of the Order of the Coif.

Industries Served:

  • Information Technology
  • Finance
  • Medical Community (Physicians, Physicians Groups)
  • Universities
  • Scientific Community (Researchers, Scientists)
  • Biotechnology
  • Engineering
  • Manufacturing
  • Pharmaceutical
  • Research Institutions
  • Retail
  • Transportation