Lax O'Sullivan Lisus Gottlieb LLP > Toronto, Canada > Firm Profile

Lax O'Sullivan Lisus Gottlieb LLP

Canada > Dispute resolution: Ontario Tier 1

Toronto-based boutique Lax O'Sullivan Lisus Gottlieb LLP is a leading player in the Ontario disputes space. The ‘outstanding team of lawyers’ is well-versed in representing both domestic and international clients in complex commercial mandates. Practice co-head Matthew Gottlieb specializes in corporate and commercial disputes, and insolvency, fraud and securities litigation. Leading alongside him, Jonathan Lisus has focused his practice on infrastructure and P3 disputes, product liability claims and securities litigation. Additional key litigators include Crawford Smith, Andrew Winton and Shaun LaubmanNadia Campion handles shareholder oppression applications and estates matters and is lauded as ‘completely fearless’ and an ‘outstanding litigator’. Paul Fruitman is noted for his work on construction, employment health disputes, while Rahool Agarwal majors on proxy fights, director and officer liability, and complex fraud cases.

Practice head(s):

Matthew Gottlieb; Jonathan Lisus


‘Lax O’Sullivan is the go-to litigation boutique in Canada for virtually any bet-the-company litigation. They have an outstanding team of lawyers and are true litigators who are not afraid to go to trial. They are pragmatic and extremely business outcome-focused.’

‘Nadia Campion is an outstanding litigator who has truly come into her own over the past few years. She can very capably handle the most difficult and demanding files. She has a terrific demeanor and is great with clients and judges. She is completely fearless and is not afraid to take difficult positions.’

‘Crawford Smith is a seasoned litigator. He is a very good strategic thinker and a very strong advocate. He is very client-focused and doesn’t lose sight of the ultimate business goals.’

‘Very attentive and timely partner-led team effort. Very responsive to client communication.’

‘Jonathan Lisus and Nadia Campion are brilliant advocates. They are highly analytical and extremely persuasive. They would be my choice for even the most complex cases.’

Key clients

Rogers Communications

Ottawa Light Rail Transit Constructors

Selena Stronach/Stronach Companies

Gospel for Asia

Wendy Sokoloff Professional Corporation

Purdue Pharma/Sackler Families


Kandis Developments

JAW Hockey Enterprises

Jacal Holdings

Manitoba Metis Federation et al

Strada Crush

Live Work Learn Play


Vale Canada

Southbridge Care Homes


Manitoba Metis Federation / Metis Child, Family and Community Services

Work highlights

  • Defended Rogers Communications regarding its $26bn acquisition of Shaw Communications.
  • Acted in Carcillo v Canadian Hockey League and achieved a dismissal of a proposed class action made up of all former and current junior hockey players who claim to have suffered abuse while playing in the Canadian major junior hockey leagues.
  • Acted for Métis child and family service agencies in constitutional litigation and class proceedings asserting claims against the province of Manitoba for unlawful appropriation of federal child benefits.

Canada > Restructuring and insolvency Tier 1

Acting for debtors, creditors, secured lenders, shareholders, regulators and bondholders, the team at boutique Lax O'Sullivan Lisus Gottlieb LLP supports commercial, real estate, telecoms, finance and energy clients involved in complex insolvency proceedings and restructurings. Practice head Matthew Gottlieb, lauded by one client as ‘always exceeding expectations’, is well-versed in corporate and commercial disputes, insolvency and restructuring, and fraud and securities litigation. Andrew Winton‘s broad litigation practice encompasses insolvency mandates and has additional focus on shareholder disputes.

Practice head(s):

Matthew Gottlieb

Other key lawyers:


‘It is evident that Matthew Gottlieb is business-minded. Rather than just focusing on the legal aspects of the case, he offers holistic advice. His level of expertise and creativity is a real value-add.’

‘Matthew Gottlieb took command over the legal matter from the outset. He is an excellent communicator and listener and always exceeds expectations. He is excellent at seeing the bigger picture.’

Key clients

FTI Consulting Canada

C&K Mortgage Services o/a Rescom Capital

Doreen Saskin

KSV Advisory

Alvarez & Marsal Canada

Grant Thornton

Laurentian University


Pace Savings & Credit Union

Mattamy (Downsview)

Jewish Foundation of Greater Toronto

2168587 Ontario

Diversified Royalty

Work highlights

  • Represented Mattamy (Downsview) Ontario in an arbitration and application to set aside an arbitral award in connection with the Urbancorp Group CCAA proceeding.
  • Advised Laurentian University in connection with its exit from CCAA protection and the Auditor-General of Ontario’s report into the circumstances leading up to the University’s insolvency.
  • Represented Pace Savings & Credit Union Limited in a complex representative claim proceeding in two CCAA insolvencies.

Lax O’Sullivan Lisus Gottlieb (LOLG) is Canada’s premier counsel firm. The firm’s lawyers handle the most complex commercial disputes and public law cases. They carry a robust trial, arbitration and appellate practice across the country and in the Supreme Court of Canada.

LOLG is regularly engaged as trial and appellate co-counsel by peer law firms, and as court officers in large and sensitive litigation mandates. The firm also acts as counsel in insolvency cases, class actions, securities litigation and administrative law matters, as well as infrastructure, franchise, employment and health law disputes.

LOLG has one of Canada’s leading restructuring and insolvency practices. The firm’s insolvency counsel are ranked among the top nationally and have material roles in Canada’s largest and most complex insolvency proceedings and restructurings.

LOLG also has a dedicated insurance litigation practice. The firm is engaged as leading counsel advising policyholder clients on insurance claims and litigating coverage disputes against major insurers.

LOLG’s practitioners are leaders at the bar, holding positions on the Chief Justice of Ontario’s Advisory Committee on Professionalism and the Supreme Court Advocacy Institute, and fellowships in elite trial organizations. Its associates are of the highest caliber, recruited primarily from judicial clerkships at the Supreme Court of Canada, provincial Courts of Appeal and the Commercial List of the Superior Court of Justice. LOLG’s partners are among the most consistently recommended counsel in Canada and represent clients in Canada, the United States, and from overseas.

For further information visit

Department Name Email Telephone
Managing Partner Matthew Gottlieb 416 644 5353
Partner Jonathan Lisus 416 598 7873
Photo Name Position Profile
Rahool Agarwal photo Mr Rahool Agarwal Rahool’s practice focuses on complex commercial and civil litigation, acting for both…
Lars Brusven photo Lars Brusven Lars has represented clients in a broad range of matters including commercial…
Nadia  Campion photo Nadia Campion Nadia’s practice focuses on complex commercial litigation including shareholder oppression applications, D&O…
Paul Fruitman photo Mr Paul Fruitman Paul’s litigation practice focuses on contract disputes, infrastructure and construction disputes, health…
Matthew Gottlieb photo Mr Matthew Gottlieb Matthew practises business litigation including corporate and commercial disputes, insolvency and restructuring…
Shaun Laubman photo Mr Shaun Laubman Shaun practises corporate commercial litigation, including shareholder and partnership disputes, fraud cases,…
Jonathan Lisus photo Mr Jonathan Lisus Jonathan’s practice focuses on commercial and public law trial and appellate litigation.…
Crawford  Smith photo Crawford Smith Crawford’s litigation practice focuses on corporate and commercial matters, energy regulatory proceedings…
Andrew Winton photo Mr Andrew Winton Andrew Winton is a partner at Lax O’Sullivan Lisus Gottlieb LLP. He…
IBA (International Bar Association)
International Academy of Trial Lawyers
ABA (American Bar Association)