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About OUM & Co. LLP

OUM, LLP, was formed in 1976 and is an accounting & business advisory firm in California, with offices in San Francisco and San Diego (Carlsbad). OUM is listed as a Top 25 Bay Area firm, is recognized as one of the Top 200 firms in the U.S. by INSIDE Public Accounting.

OUM, LLP provides quality assurance, tax and advisory services. The firm's core values are, "Respect and Recognition, Trust, Success, Quality and Community."

In 2004, the firm became an independent member of the BDO Seidman Alliance, a division of BDO USA, LLP, a U.S. professional services firm providing assurance, tax, financial advisory and consulting services. OUM is registered with the PCAOB.


Audit, tax, & advisory services to public (SEC) & private companies in the life sciences, technology, real estate, private equity/investment fund and manufacturing industries among others.


465 California Street
Suite 700
San Francisco, CA 94104
Phone: (415) 434-3744

Firm Stats

Employer Type: Private

Major Office Locations

Carlsbad, CA
San Ramon, CA