Mary L. O'Connor

Mary L. O'Connor

Commercial Litigation Litigation - Regulatory Enforcement (SEC, Telecom, Energy) Litigation - Securities
Recognized in Best Attorney USA since 2019

About Mary

Mary L. O’Connor’s practice focuses on representing public companies and their officers and directors in commercial litigation and arbitration, securities litigation, internal investigations, and regulatory investigations and enforcement proceedings.Ms. O’Connor is a member of the Commercial Panel of the American Arbitration Association and is a FINRA arbitrator.

Mary L. O’Connor’s practice focuses on representing public companies and their officers and directors in commercial litigation and arbitration, securities litigation, internal investigations, and regulatory investigations and enforcement proceedings.Ms. O’Connor is a member of the Commercial Panel of the American Arbitration Association and is a FINRA arbitrator.

Mary L. O’Connor’s practice focuses on representing public companies and their officers and directors in commercial litigation and arbitration, securities litigation, internal investigations, and regulatory investigations and enforcement proceedings.

Ms. O’Connor is a member of the Commercial Panel of the American Arbitration Association and is a FINRA arbitrator.

Professional Affiliations

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Reviews

4.6 / 5

38 Reviews

1,056 Profile Views

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Robin Cummings

Jan 31, 2026

Many thanks to Mary L. O'Connor for the hard work and dedication to my legal matter

Super helpful and professional staff at Mary L. O'Connor's office. Thanks again for everything you did for me! It was a long journey, but you made it much easier with your constant support and legal e...

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Julius Feeney

Jan 31, 2026

Simply amazing representation from Mary L. O'Connor's office during my recent legal matter

If you're looking for someone who actually cares and will fight for you, go to Mary L. O'Connor. They helped me out big time with my Commercial Litigation law issue and kept me informed at every step...

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Enrique Christiansen

Jan 31, 2026

Solid work and professional service from Mary L. O'Connor in Dallas for Texas residents

It's hard finding a reliable lawyer these days, but Mary L. O'Connor in Dallas is definitely one of the good ones. Would use them again if needed without hesitation. They are professional, responsive,...

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Dwight Stehr

Jan 31, 2026

Reliable lawyer you can count on - Mary L. O'Connor provided excellent service throughout

Solid experience overall with the law firm of Mary L. O'Connor. They know Commercial Litigation law inside and out and gave me great advice. Very helpful and got the job done exactly as they said they...

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Judith Halvorson

Jan 31, 2026

Would recommend Mary L. O'Connor for sure to anyone in Dallas needing legal help

I've already told all my friends and family about Mary L. O'Connor. If you need Commercial Litigation law help in Texas, they're the ones to see without any doubt. They are local experts who really un...