Stefan Chripounoff

Lawyer, Partner - Montréal

Québec Bar 2004
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Stefan Chripounoff is a commercial litigation partner at the Montréal office of Langlois. His practice focuses on energy law and on restructuring & insolvency. The current chair of the firm’s arbitration and ADR group, he acts in a significant number of large-scale files before all levels of the courts and arbitration tribunals. 

In the natural gas industry, Stefan advises his clients on their natural gas purchase and sale contracts and represents them in the context of complex litigations. He has had the opportunity to represent his clientele in several key transactions in the natural gas industry in Quebec over the past decade. 

Stefan acts in several significant arbitrations in Canada and the United States. He has written articles and given conferences on arbitration law topics, including on Quebec’s extensive arbitration reform that came into effect in January 2016. He sits on the executive committee of the Alternative Dispute Resolution Section of the Canadian Bar Association, Quebec Division and on the Civil and Commercial Arbitration Sectoral Table of the Quebec Institute for Mediation and Arbitration. 

He also contributes to the advancement of the judicial system by sitting on the executive committees of several professional associations, including the Liaison Committee with the Superior Court of the Canadian Bar Association, Quebec Division.


LL.B., Civil Law, University of Montréal, 2003

Mechanical Engineering (partial), McGill University, 1999

Rankings & Recognitions

2006-2007 – Finalist in the category “Volunteer of the Year” of the Young Bar Association of Montreal

2006 – Recipient of the 2006 Multiple Sclerosis Leadership Award 

Representative Work

  • Litigation – Seizure in Revendication

    Urgent court proceeding on behalf of an unpaid vendor who no longer had access to the goods sold, in order to obtain an order of seizure-in-revendication allowing the seller to retake the goods wherever they may be.

Natural gas

Services de gaz naturel RBC Inc. v. 6036821 Canada Inc. (Gestion Première Alliance) et al.
Counsel for the plaintiff in a natural-gas related lawsuit involving multiple technical issues, including whether a physical “swap” (a purchase and sale transaction) of natural gas constitutes an investment contract as defined in Quebec’s Securities Act.

Services de gaz naturel RBC Inc. v. 9080-9211 Québec Inc. (Les Propriétés Victoria) et al.
Counsel for the plaintiff in a natural-gas related lawsuit against the owner of several buildings in Montreal who refused to pay its natural gas bills after the sale of the buildings, primarily on the basis that the contract at issue was a contract for services that could be cancelled at any time. The Quebec Superior Court allowed the plaintiff’s action. That decision was appealed to the Quebec Court of Appeal, which upheld the trial judgment in favour of the plaintiff in its entirety. Leave to appeal was subsequently denied by the Supreme Court of Canada.

Athena Energie Marketing Inc. v. Mehrzad Peyrow
Counsel for the plaintiff Athena in a natural-gas related lawsuit against a defendant who refused to pay its natural gas bills. The defendant alleged that in its application of the liquidated damages clause / mitigation of damages clause in the natural-gas supply contract, Athena had failed to respect its obligation to minimise its damages. The Superior Court of Quebec allowed Athena’s action in part. On appeal, the Quebec Court of Appeal overturned the trial judgment to the extent it favoured the defendant, and confirmed that Athena had, under the circumstances, properly applied the contractual provisions at issue.

GasEDI Base Contract for the Sale and Purchase of Natural Gas
Advice and counsel to clients regarding their natural gas supply contracts, such as the GasEDI Base Contract and other contracts derived therefrom.

Transfer of clientele from one supplier to another
Represented a major Quebec natural gas supplier in connection with the assignment and transfer of its clientele to another supplier.

Sale of Athena Energy Marketing to RBC
Represented the selling shareholders in connection with (and subsequent to) the sale of the shares of the largest independent Quebec natural gas supplier to a major Canadian financial institution.

Sale of liquefied natural gas in the trucking industry
Represented a major natural gas supplier in developing and preparing a standard tripartite contract for the sale of liquefied natural gas to a major Quebec trucking enterprise.

Civil and commercial litigation

CI Investments Inc. v. The Coconut Tree Holding Inc. et al.
Lead counsel to the team that allowed CI Investments to prevail in a major dispute over the application of an indemnity clause following the sale of an enterprise.

Chalets Chanteclair v. Panorama Capital Inc. et al.
Counsel for the defendants in connection with multiple proceedings filed against the plaintiff, contesting applications for injunctive relief and actions for damages.

Remer v. Remer
Counsel for the defendants, who prevailed in Quebec Superior Court and at the Quebec Court of Appeal, in a lengthy and complex shareholder dispute with more than $100 million at stake.

General Dynamics, a U.S. multinational corporation
Representation and advocacy in connection with a dispute over a share-purchase agreement in the arms and ammunition industry. 

Piro v. Novopharm
A test case in which the issue of the constitutionality of legislative amendments in 2003 to the procedural rules applicable to the authorization (certification) stage of class actions was argued before various levels of Quebec courts.

Commercial arbitration

Commercial arbitration between a Quebec municipality and a hydro-electricity producer
Represented a producer of hydro-electricity in a major commercial arbitration following the municipality’s cancellation of the lease required for the operation of a generating station.

Manson Insulation Inc. v. Superior Energy Management Inc.
Lead counsel in a protracted arbitration involving the interpretation of various contractual clauses specific to the natural gas industry.

Canadian Royalties v. Ungava Exploration Inc. et al.
Pleaded a complex arbitration case lasting several years involving two mining companies, concerning a dispute over the interpretation and application of a joint-venture contract. Specifically argued, before the Quebec Court of Appeal, the issue of the arbitrator’s power to order specific performance by way of equivalence.

Rail transport
Major arbitration involving a rail transport corporation and a transportation agency concerning a contractual dispute. 

Bankruptcy and insolvency

White Birch Paper Company
Counsel for the Provisional Administrator of seven pension plans with claims totalling approximately $400 million in the debtor’s CCAA filing.

Joint Liquidators of Stanford International Bank Limited v. Toronto-Dominion Bank
Quebec counsel for the liquidators in the multijurisdictional liquidation of Stanford International Bank and in a major lawsuit by SIB against a large Canadian financial institution.




Other Publications

Domestic arbitration law gets harmonizing upgrade”, Alternative Dispute Resolution, The Lawyers Weekly, March 31, 2017.

Quebec natural gas contracts need work”, Energy Law, The Lawyers Weekly, January 13, 2017.

Mini-symposium “L’heure juste sur l’affaire BCE à la suite du jugement motivé de la Cour suprême du Canada : quand acteurs et institution de prestige se rencontrent” (The straight goods on the BCE case following the Supreme Court of Canada’s exhaustive judgment: when actors and prestigious institutions meet), co-authored with Vincent de l’Étoile, Point de Mire, Vol. 14, No. 4, July 2009, p. 7

“La première conférence pancanadienne sur la faillite et l’insolvabilité” (The first pan-Canadian conference on bankruptcy and insolvency), Le Monde Juridique, Vol. 16, No. 1, 2005


Langlois Knowledge

External Conferences


2016 – Drafted the presentation entitled “Stanford International Bank – Cross-border Insolvency Jurisdictional Wars” given at the ABI Cross-Border Insolvency Program, New York City

2015 – Drafted the paper entitled “Overview of the new Code of Civil Procedure provisions on arbitration” presented during a CBA Quebec Branch symposium in Montreal 

2015 – Overview of the new Code of Civil Procedure provisions on arbitration – CBA Quebec Branch symposium on the new Code of Civil Procedure

2015 – “Les développements récents en droit de la faillite attirent le regard” (Recent Developments in Bankruptcy Law That Have Attracted Attention) co-presenter, annual convention of the Quebec Bar, La Malbaie

2007 – Wrote a paper entitled “La clause d’arbitrage : est-ce la panacée?” (The Arbitration Clause: Is it a Cure-all?) distributed to participants at a Canadian Bar Association seminar on business law

2007 – Wrote a paper entitled “On Route Towards Litigation” that was presented to CN’s supplier management team

2007 – Wrote and presented a paper entitled “Overview of Litigation, the Plaintiff’s Perspective” for members of Business Network International, Montréal-Premier and Bus Tango chapters

2004 – Wrote a paper entitled “Rémunération du P-DG et du CA” (CEO and Directors’ Remuneration) for a conference organized by Federated Press

2004 – Wrote papers entitled “Le harcèlement psychologique au travail” (Psychological Harassment in the Workplace) and “La responsabilité des universités à l’égard des fêtes étudiantes” (Liability of Universities for Student Parties) for conferences sponsored by AON-Parizeau Inc.

Professional Associations

Member of the Canadian Bar Association (CBA)

Since 2016 − Member of the CBA – Quebec Branch’s Liaison Committee with the Superior Court

Since 2016 − Member of the Civil and Commercial Arbitration Sectoral Table of the Quebec Institute for Mediation and Arbitration (IMAQ)

Since 2012 − Member of the Executive Committee of the Alternative Dispute Resolution Section of the CBA, Quebec Division

Between 2005 and 2009 − Member of Business Network International, Montreal-Premier Chapter

2007 – Member of the executive committee of the Bankruptcy and Insolvency Section of the CBA, Quebec Branch

Since 2006 – Member of the Multiple Sclerosis Society of Canada

Since 2004 – Member of The Bar of Montreal

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