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About Oberweis Securities, Inc.
Oberweis Securities, Inc. (OSI) is a full service broker dealer offering diversified and comprehensive quality products and services that can meet our clients’ individual objectives for the future. The Oberweis name has been synonymous with quality investment advice for over 20 years.

Providing clients with high-quality personalized investment advice has never been more valuable than in today’s ever changing marketplace. At OSI, we specialize in assisting individual investors manage the complexities of establishing and maintaining successful financial goals. We do this by providing our clients with access to: