Arrowhead Ups Investment in Unidym

Pasadena-based Arrowhead Research disclosed this morning that the firm is increasing its ownership in Unidym, a developer of carbon nanotube technology and products. Arrowhead said that the buy comes through a stock exchange with holders of Unidym's Series A preferred stock, and will take it from 51.5% ownership in Unidym to 58.1% ownership. Arrowhead said the deal is worth 1,564,610 shares of its restricted stock.