Okada Group LLC 
Designs and manages investment portfolios.
http://www.okadagroup.com/Old Mutual plc 
International asset management firm.
http://www.oldmutual.com/
OakBrook Investments, LLC 
A registered investment advisor specializing in domestic large cap equity investments.
http://www.oakbrookinvest.com
Obermeyer Asset Management Company 
Core business is investing for individuals, corporations and foundations.
http://www.obermeyerasset.com/
O'Brien Capital Management 
Independent, fee-based registered investment advisory firm providing financial planning and money management services to individuals and corporations.
http://www.ocmi.biz/
Old Dominion Capital Management, Inc. 
Independent investment counsel, wealth management services, including asset management, estate and financial planning.
http://www.odcm.com/
The Omega Securities, Inc. 
Full service investment advisory firm providing portfolio management and financial planning services.
http://www.omegasecurities.com/
Oxford Financial Group, Ltd. 
Offering fee-only, financial and investment advisory services, and wealth management for families, individuals, and institutions.
http://www.ofgltd.com