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Harvard Apparatus Regenerative Technology Inc. - Holliston, Mass., 1.7 million shares, priced $10 to $12, managed by Summer Street Resarch Partners and Maxim Group. Proposed Nasdaq symbol HART. Business: A clinical stage regenerative medicine company developing life-saving medical devices. First products are a bioreactor and a synthetic scaffold that can be used by surgeons to create a replacement trachea, or airway, for patients who need an airway transplant.

Independent Bank Group Inc. - McKinney, Texas, 3.2 million shares, priced $24 to $26, managed by Sandler O'Neill, Evercore Partners, and Keefe Bruyette Woods. Proposed Nasdaq symbol IBTX. Business: Bank holding company with 30 offices serving the Dallas-Forth Worth metropolitan area. Bank provides a wide range of relationship-driven commercial banking products and services tailored to meet the needs of businesses, professionals and individuals.