Daniel Bach

Daniel Bach is a plaintiff-side class actions litigator, a partner in Siskinds LLP’s Toronto office and a member of the firm’s Board. He represents individuals, governments, asset managers and pension funds in complex securities, product liability, medical device and consumer protection class actions. He has argued before the Supreme Court of Canada, the Ontario Court of Appeal and the British Columbia Court of Appeal. Chambers & Partners recognizes Daniel in its nationwide plaintiff class actions rankings as “a great overall litigator, an expert in securities and excellent in other fields.” Daniel is admitted in Ontario, British Columbia and New York.

Daniel has acted in some of Canada’s most significant securities class actions. He was counsel in Arctic Glacier and IMAX, the first two cases granted leave under Part XXIII.1 of the Securities Act, both of which also certified common-law misrepresentation claims. He represented the class in Manulife and Sino-Forest, two of the largest securities class actions in Canadian history. Manulife is one of the largest Canadian securities class actions to be granted leave on a contested basis and settled for $69 million on the eve of trial. In Sino-Forest, the class recovered substantial compensation, including a $117 million settlement with Ernst & Young, one of the largest securities class action settlements with an auditor worldwide. Daniel also helped recover more than $100 million for class members in the foreign exchange conspiracy class action.

Daniel’s product liability work focuses on complex mass tort claims. He acts for the class in the certified class action against Juul concerning the marketing and safety of its products. He is lead counsel in class actions against Syngenta relating to its paraquat-containing products, including Gramoxone, which were certified in Québec and nationally. Daniel successfully argued certification for women implanted with transvaginal mesh products and recovered tens of millions of dollars for class members.

Daniel leads Siskinds’ consumer protection practice. His consumer protection work addresses systemic business practices affecting large groups of consumers, including utility charges, courier brokerage fees and product marketing. He was counsel in Helm v Toronto-Hydro Electric System Limited, which settled following the summary judgment argument, and in Wright and Zislin v United Parcel Service Canada Ltd., a Consumer Protection Act, 2002 action concerning brokerage fees charged by UPS, in which the class was certified and summary judgment was granted to the class.

Daniel is recognized in leading legal rankings. Chambers & Partners describes him as “extremely sharp, quick and an effective advocate in court and in the mediation setting.” He has also been recognized by Lexpert, Lawdragon, the Canadian Legal Lexpert Directory, and the Lexpert/American Lawyer Guide to the Leading 500 Lawyers in Canada.

Daniel is an adjunct professor at the University of Toronto Faculty of Law, where he teaches class actions. He is also a member of the Ontario Securities Commission’s Investor Advisory Panel. He previously taught class actions at Western University’s Faculty of Law and directors’ and officers’ liability, with a focus on securities law and litigation, at the Schulich School of Business at York University.

Daniel has been quoted on class actions, securities law, and consumer rights in Lexpert, The Globe and Mail, The National Post, Law Times, and The Canadian Press, and has appeared on Canada AM. His academic writing appears in the Canadian Business Law Journal and the Canadian Class Action Review.

Daniel received his B.A. (Hon.) in Political Science and History from the University of Toronto and his J.D. from the University of Toronto Faculty of Law. Before joining Siskinds, he practised securities and complex commercial litigation in New York.

American Bar Association, Member
Canadian Bar Association, Member
Law Society of Ontario, Member
New York Bar Association, Member
American Association for Justice, Member
Ontario Bar Association, Member
The Advocate’s Society, Member

• 2020 to 2027, named by Chambers & Partners as a ranked lawyer in the nationwide plaintiff class action lawyers rankings, rising to Band 2 in 2025
• 2026, named to Lexpert’s Leading 500 Cross-Border Lawyers: A Guide to Doing Business in Canada
• 2025, named to Lexpert Special Edition: Litigation
• 2025 & 2026, named to The Lawdragon 500 Global Plaintiff Lawyers
• 2019 to 2026, named to the Canadian Legal Lexpert Directory
• Daniel Bach has been selected by his peers for inclusion in The Best Lawyers™ in Canada 2019 to 2027.
• 2023 to 2025 named to the Lexpert/American Lawyer Guide for Leading 500 Lawyers in Canada

Recent representative matters include:

• Newsome v. Endeavour Mining Plc.: counsel to the class in a securities action alleging, among other things, defective internal controls.  The court granted leave and certification.
• Mann-Campbell v JUUL Labs Canada, Ltd.: counsel to the class in the class action about Juul’s vaping products.  The action was successfully certified.
• Lebeau c Syngenta: a class action alleging that paraquat, an agricultural product, can cause Parkinson’s disease.  The action was certified in Quebec in 2022.
• Mancinelli v Royal Bank of Canada: a class action arising from an alleged anti-competitive conspiracy in the foreign exchange market.  The action was certified in 2020 and more than $135 million was recovered for the class.
• Dugal v Manulife Financial: a securities class action arising out of the defendant’s Variable Annuity disclosures. On July 25, 2013, the Court granted leave to proceed under the Securities Act and certified the action. The action settled for $69,000,000 on the eve of trial.
• Vester v Boston Scientific et al: Lead counsel to the class in the only transvaginal mesh class action certified in a contested certification motion.
• Silver and Cohen v IMAX et al: Counsel to the class at the Supreme Court of Canada, in which the Court dismissed the company’s appeal from the decision of a five-member bench of the Court of Appeal. This precedent-setting case was the first secondary-market misrepresentation case to be granted Securities Act leave in Canada and the top 2010 “Canadian Big Suit” in The American Lawyer (April 2010).
• Harper v American Medical Systems Canada Inc.: Counsel to the class in two medical device class actions regarding AMS's transvaginal mesh products, both of which were successfully certified.
• Wright and Zislin v United Parcel Service Canada Ltd.: A consumer class action concerning certain “brokerage” fees charged by UPS. The Court certified the action and granted partial summary judgment to the Class, despite the denial of certification in the parallel action in British Columbia.
• Labourers v Sino-Forest et al, a securities class action arising out of the collapse of the China-based forestry company. More than $160 million was recovered for class members.
• Dobbie and Benson v Arctic Glacier Income Fund: A securities class action concerning misrepresentations regarding the competitive nature of the packaged ice market. Arctic Glacier was the second secondary market case to be granted leave pursuant to the Securities Act. Additionally, the Court certified common-law misrepresentation claims. Despite the company’s insolvency, the case settled for $13.75 million.
• Helm v Toronto-Hydro Electric System Limited: A consumer class action concerning interest disclosure. The case was settled for $5.84 million following the summary judgment argument.
• Metzler Investment GmbH v Gildan Activewear Inc.: A securities class action in which the Class secured a USD$22.5 million settlement despite the dismissal of the parallel U.S. litigation.

Speaker, "2nd National Institute on US-Canadian Securities Litigation" Presented by The American Bar Association - October 2017.
Speaker, "What's New in Securities Class Actions? Recent Developments & Emerging Trends" Presented by The Canadian Bar Association - May 2014.
Expert Speaker, Global TV report "Lenovo customers continue to fight for discount after price error debacle" - May 2014
Speaker, "Straight From the Bench" Presented by The Middlesex Law Association - May 2014
Speaker, "Inaugural Class Action Course" Presented by Federated Press - March 2014
Speaker, “What defined 2013?”, Presented by the Advocate’s Society Class Actions Practice Group - January 2014
Speaker, “Third Annual Securities Symposium”, Presented by the Advocate’s Society Securities Litigation Practice Group - September 2013
Speaker, "Secondary Market Liability Review – Class Action Litigation" An ALM Event on Securities Litigation - September 2012
Daniel E. H. Bach and Ronald Podolny, “When Numbers Tell a Story: A Quantitative Look at Certification Decisions in Ontario” (2016), 11:2 Can Class Action Rev 311
Dimitri Lascaris and Daniel E. H. Bach, “Securities Class Actions After Timminco: Has the Court of Appeal Undone Part XXIII.1?” (2012), 52:3 C.B.L.J. 414

August 6, 2014 /CNW/ - Siskinds LLP, one of Canada's leading class action law firms, is pleased to announce that it has been named again as the top-ranked Canadian firm in the "SCAS 50." Siskinds ranked 16th overall in the a global ranking of the world's 50 leading securities class action law firms, the highest ranking ever attained by a Canadian firm. It is compiled annually by Securities Class Action Services, a unit of Institutional Shareholder Services (ISS). Siskinds was the first Canadian firm to rank in the top 50 and has been the top Canadian firm each year since 2010.

Daniel has appeared in the following news articles, segments, and publications:

• September 25, 2025 - Law360 Canada, “B.C. court narrows herbicide class action, strikes battery and general damages claims,” written by Karunjit Singh. Daniel comments on a Court of Appeal decision in the paraquat class action.
• March 28, 2024 - The Western Producer, "Two class action lawsuits take aim at paraquat," written by Sean Pratt. Daniel highlights that there is compelling evidence linking paraquat to Parkinson's disease and emphasizes the need for proper chemical testing and disclosure to protect the health of farmers.
• March 15, 2024 - The Globe and Mail, "The dark side of Bay Street's private debt funds: Investors often fly blind, and billions of dollars are now trapped," written by Tim Kiladze. Daniel shares his thoughts on the challenges faced by retail investors who invest in private debt funds and the limited options for recourse available when these funds encounter difficulties.
• March 5, 2024 - Advisor.ca, "What's next for proposed class actions arising from last year's data breach?" written by Michelle Schriver. Daniel comments on the challenges of managing overlapping class actions across various jurisdictions in Canada.
• October 18, 2022 - Law360™ Canada (formerly The Lawyer's Daily), "B.C. Supreme Court does not let U.S. tobacco conglomerate off the hook in vaping class action," written by Heidi Exner. Daniel provides his perspective on the B.C. Supreme Court's decision to allow class action proceedings against JUUL Labs and Altria Group, highlighting that it "ensures that Canadians are able to sue all the parties that they allege have harmed them."
• June 17, 2020 - HuffPost Canada, "Ontario's Bill 161 Will Make It Harder To Sue Negligent Nursing Homes, Lawyers Warn," written by Emma Paling. Daniel discusses the impact that the proposed Bill 161 could have on potential litigation against long-term care homes and the implications on individuals seeking justice.

• Gramoxone® (Paraquat) associated with Parkinson’s Disease
• Mandatory Arbitration Provisions in the Class Action Context
• Daniel Bach Interviewed by BNN about TD & RBC Trading Service Outage
• Cross-Border Cooperation in Class Action Litigation
• Basic’s Alive – The Judicial Oak Weathers the Storm
• All That e-Glitters: Bitcoins and Securities Regulation