The O’Sullivan, Dunaway & Stemm Group

Merrill Lynch Wealth Management
6100 South Yale Ave
Suite 1500 & 1650
Tulsa OK 74136
(918) 586.8019
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Recognition
The O’Sullivan, Dunaway & Stemm Group
Forbes "Best-in-State Wealth Management Teams", 2026
(Published on January 7, 2026. Rankings based on data as of March 31, 2025.)
Meet Our Team
Stephen O'Sullivan Headshot Image
Stephen O'Sullivan,

CIMA®

Senior Vice President, Wealth Management Advisor
918.586.8020
Steve Dunaway,

CFP®

Senior Vice President, Wealth Management Advisor
918.586.8033
Andrew Stemm
Financial Advisor
918.586.8007
Megan Medders
Registered Wealth Management Client Associate
918.586.8019
About Merrill

Bringing fresh perspectives to your financial life

The financial decisions you make today can help determine the future you build for yourself and your family. Carving a clear path forward starts with connecting your life and finances. A Merrill advisor provides access to the investing insights of Merrill and banking capabilities of Bank of America to help you make informed decisions as you pursue your goals.

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Investments & Wealth Institute™ (The Institute) is the owner of the certification marks CIMA® and Certified Investment Management Analyst®. Use of CIMA®, and/or Certified Investment Management Analyst® signifies that the user has successfully completed the Institute’s initial and ongoing credentialing requirements for investment management professionals.
Certified Financial Planner Board of Standards, Inc. (CFP Board) owns the certification marks CFP®, CERTIFIED FINANCIAL PLANNER®, and the CFP® (with plaque design) in the United States, which it authorizes use of by individuals who successfully complete CFP Board’s initial and ongoing certification requirements.