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

1,055 Profile Views

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Edna Weber

Jan 31, 2026

The absolute best in Dallas for Commercial Litigation law - and I mean that from the bottom of my heart

I didn't think I'd find such a good lawyer in Texas, but here we are and I am thoroughly impressed. Mary L. O'Connor is just awesome and exceeded all my expectations. No complaints at all! They really...

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Pauline Cummings

Jan 31, 2026

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

I was really stressed about my case in Dallas, but Mary L. O'Connor made everything so smooth and stress-free. Seriously, the best decision I've made lately was hiring them. They handled every detail...

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Juana Buckridge

Jan 31, 2026

Outstanding experience with Mary L. O'Connor in Dallas - truly the best legal team

Honestly, I can't thank Mary L. O'Connor enough for everything they've done for me. They really know their stuff when it comes to Commercial Litigation law and it shows in the results. 10/10 would rec...

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Lynn O'Hara

Jan 31, 2026

The absolute best in Dallas for Commercial Litigation law - and I mean that from the bottom of my heart

I was really stressed about my case in Dallas, but Mary L. O'Connor made everything so smooth and stress-free. Seriously, the best decision I've made lately was hiring them. They handled every detail...

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Chad Greenholt-Smitham

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...