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John O'Shaughnessy

Business Intermediary at Murphy Business

MO Website (314) 369-1436
Updated October 2026

About

John O'Shaughnessy is a Business Intermediary with Murphy Business in St. Louis, Missouri, assisting clients in buying and selling businesses and offering business valuations and machinery and equipment appraisals. He is a Murphy trained business transfer specialist and holds a FINRA Series 65 license as a Registered Investment Advisor Representative. His prior work was in financial services, in investment management and investment banking and most recently on the investment committee of a family office, where he built years of valuation experience. He earned a Bachelor of Business Administration with a concentration in Finance and a minor in accounting from Saint Louis University in 2010 and was inducted into Beta Gamma Sigma.

Who is a good fit for John O'Shaughnessy

  • St. Louis owners who need a valuation or a machinery and equipment appraisal
  • Sellers who want an intermediary with investment banking and family office valuation experience

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Frequently Asked Questions

Yes. He offers business valuations and machinery and equipment appraisals, drawing on years of valuation work in investment management, investment banking, and a family office investment committee.

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