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

1,061 Profile Views

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Tina Ritchie

Jan 31, 2026

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

Everyone at Mary L. O'Connor's office in Dallas was so nice and helpful. They made a tough situation a lot easier to deal with by being so patient and explaining everything clearly. I never felt like...

R

Roosevelt Dach

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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Kerry Bergnaum

Jan 31, 2026

Top notch experts in Dallas - Mary L. O'Connor is by far the best lawyer I've ever had

Really glad I found Mary L. O'Connor for my case. They were a huge help and made everything understandable. I was very impressed with their knowledge and how they handled the opposition. If you're in...

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Vicky Johns

Jan 31, 2026

Excellent legal representation provided by Mary L. O'Connor for my Commercial Litigation law case

Mary L. O'Connor is fantastic and very professional. Don't hesitate to hire them if you're in Texas and need help. They really know their stuff and will go the extra mile to make sure you're taken car...

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Joel Towne

Jan 31, 2026

A huge weight off my shoulders thanks to the amazing work of Mary L. O'Connor

Just wanted to say a huge thanks to Mary L. O'Connor and the staff. They really went above and beyond for me and my family during a very difficult legal battle. We couldn't have done it without their...