Sullivan Hazeltine Allinson llc

Attorneys at Law

William D. Sullivan

William D. Sullivan


Tel 302.428.8191
Fax 302.428.8195


William D. Sullivan on LinkedIn

Bill focuses his practice on commercial bankruptcy, creditors’ rights matters, and commercial litigation.

Bill frequently appears before the Delaware Bankruptcy Court and the Delaware Chancery Court.  In corporate Chapter 11 bankruptcy matters, he regularly represents Debtors, Committees, secured and unsecured creditors, trustees, asset purchasers, landlords, insurance companies, officers and directors, and governmental entities.  Bill also handles general claims litigation and prosecutes and defends adversary actions, including fraudulent conveyance and preference litigation.

Prior to starting his own firm, Bill was a partner with the Wilmington office of Buchanan Ingersoll, and a partner with the Wilmington firm of Elzufon Austin Reardon Tarlov & Mondell, P.A., where he developed and led its bankruptcy practice.  His prior experience includes the handling of insurance coverage matters and personal injury litigation.  He has tried a dozen civil cases to verdict and has argued before the Delaware Supreme Court and the Third Circuit Court of Appeals.

Bill is a member of the Delaware State Bar Association, the American Bankruptcy Institute, and the Delaware Bankruptcy American Inn of Court.


Juris Doctor, cum laude 1989
Georgetown University Law Center

Bachelor of Science 1984
Chemical Engineering
University of Notre Dame


Liberty Brands - lead counsel to the Debtor in a successful 363 sale case

WR Grace – Delaware counsel to the Zonolite Attic Insulation (ZAI) Committee, representing holders of property damage claims

Pacific Energy – lead counsel to start-up which became successful buyer of Alaskan oil and gas assets

Tribune – Delaware counsel to Wilmington Trust, as Indenture Trustee for bondholders with claims in excess of $1 billion

WP Steel – bankruptcy counsel to purchaser of former Bethlehem Steel plant site at Sparrows Point, MD

Satcon – Delaware counsel to unsecured creditors committee

CDOW – lead bankruptcy counsel to religious organizations in negotiated Chapter 11 settlement plan


Delaware State Bar Association

American Bankruptcy Institute

Delaware Bankruptcy American Inn of Court