AO

Anthony O'Brien, Class Action Attorney in the United States

Over 20 years of legal practice · focused on Class Action, Product Liability, and Securities

Associate

Practicing class action since 2006.

20+
Years practicing
2
Bar admissions

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Quick answer

Anthony O'Brien is an associate based in Toronto, ON. The practice focuses on Class Action, Product Liability, and Securities. Anthony has over 20 years of legal experience.

Based in
Toronto, ON
Experience
over 20 years
Known for
Class Action · Product Liability · Securities
  • Handles Class Action, Product Liability, and Securities matters from Toronto, ON.
  • Over 20 years of practice as a licensed attorney.

About Anthony O'Brien: Anthony O'Brien is an associate based in Toronto, ON. The practice focuses on Class Action, Product Liability, and Securities. Anthony has over 20 years of legal experience.

Areas of practice

Legal matters Anthony takes on

Anthony concentrates on class action, product liability, securities, and civil rights. Each area below outlines the kind of case Anthony handles, typical outcomes to expect, and how the intake process starts.

Class Action cases nationwide

Anthony takes class action matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Anthony agrees to represent you.

Product Liability cases nationwide

Anthony takes product liability matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Anthony agrees to represent you.

Securities cases nationwide

Anthony takes securities matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Anthony agrees to represent you.

Civil Rights cases nationwide

Anthony takes civil rights matters nationwide. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Anthony agrees to represent you.

Biography

Meet Anthony O'Brien — class action lawyer in the U.S.

Anthony O'Brien is an associate based in Toronto, ON. The practice focuses on Class Action, Product Liability, and Securities. Anthony has over 20 years of legal experience.

Anthony O'Brien is a lawyer practicing class actions, mass torts, securities and 1 other area of law. Anthony has been licensed for 20 years. Anthony practices at Siskinds LLP in Toronto, ON.

Working with Anthony on a class action matter

Anthony O'Brien is a lawyer practicing class actions, mass torts, securities and 1 other area of law. Anthony has been licensed for 20 years. Anthony practices at Siskinds LLP in Toronto, ON.

Clients Anthony works with

Anthony reviews new inquiries case-by-case for class action, product liability, and securities matters in the United States.

Credentials

Education, bar admissions, and languages

  • University of Melbourne, Australia LL.B. B.Comm. University of Melbourne, Australia LL.B. Hons.

Jurisdictions

Anthony's state bar admissions

  • Ontario

    2008 · ACTIVE

  • Victoria, Australia

    2006 · ACTIVE

Anthony studied at — in University of Melbourne, Australia LL.B. B.Comm. University of Melbourne, Australia LL.B. Hons..

Law school and academic background

Anthony completed — in University of Melbourne, Australia LL.B. B.Comm. University of Melbourne, Australia LL.B. Hons.. Formal legal training is one signal of substantive knowledge — the day-to-day practice Anthony runs in the state is where that training gets applied to real client questions.

Locations

Anthony O'Brien's office in Toronto

Anthony's primary office is at 47 Colborne Street, Suite 203, Toronto, ON, M5E 1P8. In-person meetings are by appointment; a phone intake usually comes first.

Main office

47 Colborne Street, Suite 203

Toronto, ON M5E 1P8

Open in Google Maps

Client feedback

Client reviews of Anthony O'Brien

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Hiring guide

How to hire Anthony O'Brien — what to expect in your first consultation

Working with a new class action attorney should feel structured. Here's how the first two conversations with Anthony usually go, from the moment you request a consult to the day representation begins.

Consultation formats and pricing

Anthony charges for the initial consult. That fee is credited toward representation if you retain Anthony's office.

What to bring to your first meeting

Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; Anthony will tell you what matters and what doesn't.

Questions to ask a class action attorney in your state

A short list to run through before you commit: How many class action matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?

Fees & payment

Fees, payment methods, and consultation options for Anthony

Anthony discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in class action practice — ask which fits.

Hourly rates, contingency fees, and flat-fee options

Every class action matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. Anthony confirms the model in the engagement letter before any work starts.

Payment methods and payment plans

Anthony's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many class action practices work with clients on structured schedules.

Frequently asked

Frequently asked questions about Anthony O'Brien

  • How much does it cost to hire Anthony for a class action case?

    Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Anthony walks through the likely range during the consult so there are no surprises.

  • Does Anthony offer a free consultation?

    Anthony charges for the initial consult; that fee is credited toward representation if you retain Anthony's office. Some class action attorneys offer free consults — check Anthony's current terms during booking.

  • How long do class action cases in this state typically take?

    Simple class action matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. Anthony gives a realistic estimate for your facts at the consult — vague answers here are a red flag.

  • Can Anthony take my case if I'm outside the area?

    Anthony evaluates matters case by case. If the venue is outside Anthony's regular jurisdictions, the intake call will confirm whether direct representation or a referral makes more sense.

  • What should I bring to my first meeting with Anthony?

    Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. Anthony will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.

  • Is Anthony accepting new class action clients right now?

    Anthony's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.