Cassie L. Barr
Partner, Attorney at UB Greensfelder
About
Cassie L. Barr, a partner at UB Greensfelder, emphasizes mergers and acquisitions for middle market companies. She handles tax controversy matters before the Internal Revenue Service, and before state taxing authorities. Her merger and acquisition clients include health care, technology, and construction companies. She also counsels manufacturing and distribution companies on mergers and acquisitions. She earned her J.D. from Saint Louis University School of Law in 2011. She holds a 2007 B.S. and a 2008 M.B.A. in business and accounting from Southern Illinois University Edwardsville. Before she joined the firm, she served as an international tax associate at a big four professional services firm. The Legal 500 named her to the US Elite for Missouri Corporate and M&A in 2025. She plans corporate and business taxes for her clients.
Who is a good fit for Cassie L. Barr
- Middle market health care companies pursuing a merger or acquisition.
- Technology companies seeking mergers and acquisitions counsel.
- Construction companies completing a merger or an acquisition.
- Manufacturing and distribution companies preparing a corporate merger.
Education and admissions
- Education
- Saint Louis University School of Law, J.D., 2011
- Southern Illinois University Edwardsville, M.B.A., 2008
- Southern Illinois University Edwardsville, B.S., 2007
- Bar admissions
- Missouri, Illinois
Recognition
- Named to T he Best Lawyers in America®, Business Organizations (including LLCs and Partnerships); Tax Law (2023-2027)
- Named to The Legal 500 US Elite, Missouri, Corporate and M&A (2025)
- Named Best Lawyers® Business Organizations (including LLCs and Partnerships) “Lawyer of the Year” in St. Louis (2025)
- Named to Best Lawyers: Ones to Watch® in America (2021-2022)
Specialties
Deal profile
- Typical deal size
- Any deal size
- Remote work
- In-person / regional