Nanostellar, a Menlo Park, Calif. provider of platinum nano-composite catalyst solutions, is raising a $3 million bridge financing round, according to a regulatory filing cited by PE Wire. The company previously raised around $10 million, from firms like 3i Group, Khosla Ventures, AsiaTech Management Monitor Ventures, Firelake Capital Management, Big Basin Partners and Modu Angel Fund, according to the report.

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