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

1,058 Profile Views

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Tamara Bernhard

Jan 31, 2026

Five stars for the incredible team at Mary L. O'Connor in Dallas - they are amazing

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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Janet Rohan

Jan 31, 2026

So glad I called Mary L. O'Connor to handle my Commercial Litigation law case in Dallas

Mary L. O'Connor has been doing this since Recognized in Best Lawyers since 2019, and it definitely shows in their work. They're pros through and through and I wouldn't trust anyone else with my legal...

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Jaime Wintheiser

Jan 31, 2026

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

Needed help with Commercial Litigation law and Mary L. O'Connor delivered on their promises. They're professional, efficient, and easy to talk to. Good choice for anyone in Texas looking for high-qual...

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Don Stoltenberg

Jan 31, 2026

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

I wasn't sure who to call for my Commercial Litigation law problem, but I'm so glad I went with Mary L. O'Connor. They really listened to me and understood my situation. It was such a relief to have s...

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Abel Grady

Jan 31, 2026

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

I wasn't sure who to call for my Commercial Litigation law problem, but I'm so glad I went with Mary L. O'Connor. They really listened to me and understood my situation. It was such a relief to have s...