Jonathan Stemerman advises clients in a wide variety of complex litigation, transactional and insolvency matters. He concentrates his practice in the areas of corporate, commercial and bankruptcy litigation, as well as corporate transactions, workouts and restructurings.

Jon has represented clients in numerous corporate and complex commercial litigation cases in Delaware and Pennsylvania. He frequently litigates matters in Delaware’s Court of Chancery, including actions involving breach of fiduciary duty, business divorce, receiverships, and books and records requests. Additionally, he represents both plaintiffs and defendants in breach of contract actions and other complex commercial disputes in state and federal courts.

He regularly serves as counsel to debtors, creditors and trustees in a wide variety of bankruptcy matters. Jon often represents plaintiffs and defendants in preferential transfer and fraudulent conveyance actions. He also advises clients in bankruptcy matters involving the sale or purchase of assets, assumption and assignment of leases and contracts, and intellectual property issues. He also assists debtors and creditors in out-of-court restructuring and workouts.

Further, Jon represents startups and emerging companies in transactional matters, including entity formation, investment rounds and wind downs.

Jon also counsels clients on D&O insurance coverage matters, including issues surrounding the duty to defend, priority of payment, advancement and indemnification. He has defended entities in Delaware in bad faith denial of coverage and advancement actions.

A certified Lean Six Sigma Green Belt, Jon leverages his skill set to provide cost efficiencies to his clients. He is also active in the American Bar Association, having held various leadership roles throughout his career.


Prior to joining Armstrong Teasdale, Jon was a shareholder at another Delaware-area law firm. Before that, he spent several years at large East Coast law firms focusing on complex commercial litigation.

Following law school, he served as a clerk to the Hon. Randy J. Holland of the Delaware Supreme Court.


  • Villanova University School of Law  (J.D., cum laude, 2003)
  • Colgate University  (B.A., 2000)
    • Pi Sigma Alpha, Political Science Honor Society


  • Delaware
  • Pennsylvania
  • U.S. District Court, District of Delaware
  • U.S. District Court, Eastern District of Pennsylvania

Professional Activities

  • Lean Six Sigma Green Belt
  • American Bar Association Business Law Section (Vice-Chair, E-Discovery Subcommittee, Business and Corporate Litigation Committee; Vice Chair, LLC Issues in Bankruptcy Subcommittee, LLCs, Partnerships and Unincorporated Entities Committee; Contributing Editor, Business Law Today)


  • Turnaround Atlas Award for the Cross Border Special Situation M&A Deal of Year (sm) (2022)
  • Delaware Super Lawyers®, Rising Star (2012-2018)
  • American Bar Association (Business Law Fellow, 2016-2018)
  • James J. Manderino Award for Trial Advocacy (2003)
  • Villanova Law Review (Managing Editor)
Contact Us
  • Worldwide
  • Boston, MA
  • Chicago, IL
  • Denver, CO
  • Dublin, Ireland
  • Edwardsville, IL
  • Jefferson City, MO
  • Kansas City, MO
  • Las Vegas, NV
  • London, England
  • Miami, FL
  • New York, NY
  • Orange County, CA
  • Philadelphia, PA
  • Princeton, NJ
  • Salt Lake City, UT
  • St. Louis, MO
  • Washington, D.C.
  • Wilmington, DE
abstract image of world map
Boston, MA
800 Boylston St.
30th Floor
Boston, MA 02199
Google Maps
Boston, Massachusetts
Chicago, IL
100 North Riverside Plaza
Suite 1500
Chicago, IL 60606-1520
Google Maps
Chicago, Illinois
Denver, CO
4643 S. Ulster St.
Suite 800
Denver, CO 80237
Google Maps
Denver, Colorado
Dublin, Ireland
Fitzwilliam Hall, Fitzwilliam Place
Dublin 2, Ireland
Google Maps
Edwardsville, IL
115 N. Second St.
Edwardsville, IL 62025
Google Maps
Edwardsville, Illinois
Jefferson City, MO
101 E. High St.
First Floor
Jefferson City, MO 65101
Google Maps
Jefferson City, Missouri
Kansas City, MO
2345 Grand Blvd.
Suite 1500
Kansas City, MO 64108
Google Maps
Kansas City, Missouri
Las Vegas, NV
7160 Rafael Rivera Way
Suite 320
Las Vegas, NV 89113
Google Maps
Las Vegas, Nevada
London, England
Royal College of Surgeons of England
38-43 Lincoln’s Inn Fields
London, WC2A 3PE
Google Maps
Miami, FL
355 Alhambra Circle
Suite 1200
Coral Gables, FL 33134
Google Maps
Photo of Miami, Florida
New York, NY
7 Times Square, 44th Floor
New York, NY 10036
Google Maps
New York City skyline
Orange County, CA
19800 MacArthur Boulevard
Suite 300
Irvine, CA 92612
Google Maps
Philadelphia, PA
2005 Market Street
29th Floor, One Commerce Square
Philadelphia, PA 19103
Google Maps
Philadelphia, Pennsylvania
Princeton, NJ
100 Overlook Center
Second Floor
Princeton, NJ 08540
Google Maps
Princeton, New Jersey
Salt Lake City, UT
222 South Main St.
Suite 1830
Salt Lake City, UT 84101
Google Maps
Salt Lake City, Utah
St. Louis, MO
7700 Forsyth Blvd.
Suite 1800
St. Louis, MO 63105
Google Maps
St. Louis, Missouri
Washington, D.C.
1717 Pennsylvania Avenue NW
Suite 400
Washington, DC 20006
Google Maps
Photo of Washington, D.C. with the Capitol in the foreground and Washington Monument in the background.
Wilmington, DE
1007 North Market Street
Wilmington, DE 19801
Google Maps
Wilmington, Delaware