William G. Sullivan
William G. Sullivan
William G. Sullivan is a principal at Martin, Brown, Sullivan, Roadman, & Hartnett, Ltd.  Mr. Sullivan tries cases.  He has over 35 years experience trying cases in both state and federal courts.   His practice is divided almost equally between representation of plaintiffs and defendants, including companies of all sizes and individuals.  Mr. Sullivan has represented defendants in civil and criminal securities and antitrust cases and both civil and criminal RICO cases.  He also has served as plaintiff’s counsel in civil RICO cases.  Mr. Sullivan has litigated more than 100 contested hearings involving temporary restraining orders and preliminary injunctions.  As plaintiff’s counsel, Mr. Sullivan has successfully prosecuted dozens of civil fraud cases and represented clients in civil rights actions and trade secrets. Mr. Sullivan has guided individuals and businesses through corporate governance and compliance issues involving state and federal regulatory agencies. He has represented clients in Foreign Corrupt Practices Act and World Bank investigations. Mr. Sullivan has tried cases in the U.S. Tax Court with other members of his office that have resulted in the savings of hundreds of millions of dollars. 
Prior to joining the firm, Mr. Sullivan served in the Office of the Illinois Attorney General.  Mr. Sullivan served as Chief of both the General Law and Consumer Protection Divisions and was appointed Chief of the Toxic Waste Strike Force.  He also supervised the Public Utilities and Anti-Trust Divisions.

Mr. Sullivan is a member of the Board of Directors of Marquette Bank and of Marquette National Corporation, a bank holding company. He serves on the Audit Committee, the Nominating and Corporate Governance Committee and Asset and Liabilities Committee of those institutions. 

Additional Information »


IIT/Chicago-Kent College of Law, J.D., 1978;
     with honors
Northern Illinois University, B.S., 1971

Bar Admissions


Court Admissions

Northern District of Illinois
     General and Trial Bars
Central District of Illinois
United States Tax Court
United States Court of Appeals for the Fifth,
    Seventh and Eleventh Circuits
United States Supreme Court

Notable Cases and Results

Estate of Franklin Z. Adell v. Commissioner of Internal Revenue, U.S. Tax Court, T.C. Memo 2014-155. Represented Petitioners as part of trial team that resulted in a decision that vacated an IRS estate tax deficiency of approximately fifty million dollars, as well as an understatement penalty of over fifteen million dollars.

PolyBrite International v. Paul Brenner, et al.,
Case No. 08 C 7917 (N.D. Ill.)
Represented PolyBrite in a lawsuit against three former employees, including its chief operating officer. The action arose out of allegations that the employees schemed to steal the company’s technical expertise and confidential information to compete against it. Two of the defendants formed a corporation in Hong Kong to sell a competing line of products. An ex parte TRO and preliminary injunctive relief were granted against all three defendants. Ultimately, seven figure judgments were granted as to two of the defendants. Final injunctive relief was granted to all three defendants.
DeLafont v. Beckelman, Case No. 02 C 5448 (N.D. Ill.)
Jury trial in October-November, 2005.  Represented two state officers who were defendants in a civil rights action.  Defendants were sued for millions of dollars for allegedly manufacturing evidence, and other wrongful conduct, in relation to an investigation of child molestation.  After a two week jury trial, verdict returned for defendants and against all five plaintiffs. 

Securities and Exchange Commission v. Dean L. Buntrock,
et al.
, Case No. 02 C 2180 (N.D. Ill.)
Represented former senior vice-president and secretary of Waste Management in SEC enforcement action in which client was alleged to have violated or aided and abetted violation of Section 13(a) of Securities Act of 1933, Sections 10(b) and 13(a) of Securities Act of 1934 and Exchange Act rules 10b-5.  SEC alleged systematic scheme to misrepresent Waste Management’s financial results by overstating profits by $1.7 billion.
Travelers Indemnity Company of Illinois v. Bruce Farmer d/b/a Hills Custom Roofing, et al., Case
No. 03 C 4708 (N.D. Ill.)
Represented insurance company in action against corporate defendant and its owner on theories of breach of contract and fraud.  In April, 2005, a jury returned a verdict against company and its owner, awarding plaintiff $835,856.  In addition, jury awarded plaintiff a $250,000 award of punitive damages against the company’s owner, James Farmer. 
Travelers Indemnity Company of Illinois v. Midland Logistics, Case No. 00 C 2202 (N.D. Ill.)
Represented plaintiff in breach of contract case alleging defendants failed to pay insurance premiums.  Case tried before a jury in June, 2004.  Verdict returned in favor of plaintiff in amount of $417,491.  
Mattenson v. Baxter Healthcare Corporation, Case No. 02 C 3283 (N.D. Ill.) 
Tried two week jury trial (November, 2003) representing a discharged patent attorney who sued on a theory of age discrimination.  Jury verdict in favor of client.  Judgment in excess of $1,000,000 for back pay; this was the largest back pay award for age discrimination case in the history of the district court.  Jury found that Baxter’s actions were “wilful,” resulting in doubling of jury verdict to over $2,000,000. 
United States v. Bailin, Case No. 05 CR 48 (S.D. N.Y.) 
Criminal insider trading, false audit confirmations.
Prime Leasing, Inc. v. Equipment Leasing Specialists, Inc., et al., Case No. 97 C 3886 (N.D. Ill.)
Represented lender against borrowers who owned and operated medical imaging centers throughout the United States.  Sued companies and principals on various theories ranging from breach of contract, conspiracy and fraud.  Obtained recovery of $8.3 million in cash. 
Dupuy v. Samuels, Case No. 97 C 4199 (N.D. Ill.)
Appointed to serve as special assistant attorney general and lead trial counsel representing Director of the Illinois Department of Children and Family Services in a class action that challenged the constitutionality of the state’s investigation and adjudicative process as it relates to investigations of child abuse and neglect.

Author of the following statutes:

Travel Promotion Consumer Protection Act, 720 ILCS 350/1
Illinois Burial Rights Act, 820 ILCS 135/1
Aggravated Stalking Law, 720 ILCS 5/12-7.4

Bar/Professional Association Involvement

Illinois Bar Association
Chicago Bar Association
American Bar Association
Federal Bar Association (Member, Board of Directors)

Other Affiliations

Marquette Bank, Chicago, Illinois
Director, 1994 to present
Asset/Liability Committee
Member, Trust Committee (Chair 2004-2009)
Marquette Bank Foundation, Director (2004 to present)
Marquette National Corporation, Board of Directors (2008 to present)
Member, Audit Committee (2008 to present)
Member, Corporate Governance & Nominating Committee (2008 to present)