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Sidley Austin LLP


10 ranked lawyersBand 1IllinoisUSA 2021 View ranking table
chambers review
department information
Ranked Lawyers
chambers review
department information
Ranked Lawyers

Chambers Review

Chambers Research is conducted by 200 Research Analysts, across 200 jurisdictions and provides nearly 6,000 rankings tables. Annually we collect hundreds of thousands of responses from clients, the majority via in-depth interview. Learn more about our methodology.

What the team is known for

Dominant and highly acclaimed practice that demonstrates outstanding expertise across the board in litigation, appearing in some of the most significant criminal and civil cases in the market. Boasts varied sector expertise in areas such as healthcare, financial services and defense, with significant capabilities in the securities space. Impressively deep bench of high-quality practitioners who act on both commercial and criminal matters for domestic and international corporations. Recent involvement includes assistance with litigation associated with data breaches and cybersecurity issues.


Sources say: "The lawyers are highly competent and deliver extremely high-quality work product."

"The Sidley team is made up of high-quality individuals," says a client, who adds: "They get things done efficiently and effectively."

A client reports: "The team has been outstanding, prepared, efficient, and well organized throughout."

Work highlights

Represented Walgreens in a breach of contract suit against Theranos relating to contracts to put Theranos testing in Walgreens stores.

Represented Quest Diagnostics in all class action litigation and government investigations relating to a data security attack at a debt collection subcontractor, American Medical Collection Agency.

Acted for Johnson & Johnson in shareholder derivative litigation in federal and state court with shareholders alleging breaches of fiduciary duty with respect to the sale of opioid products.

Notable practitioners

Bruce Braun is widely recognized for his handling of complex commercial disputes for clients in the accounting, auditing and financial services sectors, among others.
"Bruce is a brilliant attorney who is always impeccably prepared. He has a very strong command of the law and is a strategic and practical thinker." "He communicates extraordinarily well and is unbelievably smart."

Daniel Rubinstein regularly advises on both internal and government investigations, including those involving allegations such as fraud and FCPA violations.
"He is very strategic and a good trial lawyer.""Daniel is an excellent lawyer."

David Gordon has experience across a range of commercial disputes, including large-scale, cross-border mandates involving accounting concerns.
"David is an outstanding civil litigation lead. He is well versed in the state of the law in this area and is able to divine the likely outcomes and thus provide effective counsel.""An outstanding commercial litigator and a wise counselor on numerous issues."

David Hoffman demonstrates notable strength in white-collar mandates such as internal and external investigations into allegations of bribery, money laundering and cybersecurity violations. He is also experienced in criminal trial proceedings and suits brought under the False Claims Act.
"David is a top-notch litigator.""An outstanding attorney."

Hille Sheppard is highly respected for her representation of corporate clients facing big-ticket securities class actions and derivative suits, as well as advising on external investigations.
"Hille is a terrific securities litigator.""She is so sensitive to the needs of clients is easy to deal with and is quick, prompt and doesn't waste any time getting the job done."

James Ducayet has extensive experience acting for both corporate entities and individuals in disputes involving securities fraud, breach of fiduciary duty and shareholder litigation.
"He is very knowledgeable on the law, has a very calm demeanor and has very good judgment that you can rely on.""He puts clients at ease and is very well versed in securities litigation law."

Kristen Seeger excels in shareholder derivative and securities fraud disputes, often acting for large commercial clients and their directors.
"Kristen is an exceptionally strong and capable lawyer who is always remarkably prepared. She has a calmness of manner that relieves difficulties and inspires confidence.""She is incredibly helpful, detail-oriented and thoughtful in her approach."

Nilofer Umar has a broad practice that sees her defend corporate and individuals clients in claims such as derivative litigations, class actions and breach of fiduciary duty proceedings.
"She is a tremendous securities and derivatives lawyer.""She has a very calming presence, is extremely professional and is a really strong advocate."

Scott Lassar is known for his representation of major clients such as those in the manufacturing and automotive industries on a broad range of investigations, including DOJ, SEC and EPA proceedings.
"Scott is a seasoned practitioner in the white-collar criminal arena - he has deep knowledge of the government’s processes, the decision-making criteria employed by the US Attorney’s Office and of the unique perspectives of the various judges in the district.""He is one of the Bar's leading luminaries."

Walter Carlson is a leading securities litigator who regularly represents clients in large-scale class and derivative actions involving issues such as fraud and corporate transactions.
"A gentleman, a scholar and a zealous advocate for his clients.""A legendary securities litigator who lives up to his moniker - a great asset in the area."

Department Information

This content is provided by Sidley Austin LLP.


For more information on the Commercial Litigation and Disputes practice, please visit the practice's page at:

For more information on the Securities and Shareholder Litigation practice, please visit the practice's page at:

For more information on the White Collar Crime and Government Investigations practice, please visit the practice's page at:


Sidley Austin LLP


One South Dearborn




IL 60603

View Firm Profile

Ranked Lawyers

Chambers Research is conducted by 200 Research Analysts, across 200 jurisdictions and provides nearly 6,000 rankings tables. Annually we collect hundreds of thousands of responses from clients, the majority via in-depth interview. Learn more about our methodology.


Litigation: General Commercial

Bruce R Braun
Band 2
David A Gordon
Band 3

Litigation: Securities

Hille R Sheppard
Band 1
James W Ducayet
Band 1
Kristen Seeger
Band 2
Nilofer Umar
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