Energy efficiency technology company Transphorm, already backed by investors including Nihon Inter Electronics Company and Google Ventures, files for $15m fund raise.
Transphorm, a US-based energy efficiency technology company, has raised $15m according to a regulatory filing in February.
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Transphorm has now raised approximately $133m. In October 2012, it closed its series E round at $35m, led by Japan-based electronics business Nihon Inter Electronics Company (NIEC) and Japan-based public-private partnership Innovation Network Corporation of Japan (INCA).
Existing investors in California-based Transphorm include Google Ventures, the corporate venturing unit of the…
