Nantero, a US-based developer of carbon nanotubes for the development of semiconductor devices, has raised more than $10m in its series D round from a consortium including two undisclosed corporate venturing units as lead investors. Its regulatory filing said it had raised $10.6m of a planned $17.6m round and the company said its D series was “oversubscribed”. Nantero’s outside directors include former IBM senior vice-president Orest Bilous and Margaret Seif, general counsel at chip maker Analog Devices. The syndicate also included existing investors, venture capital firms Charles River Ventures, Draper Fisher Jurvetson, Globespan Capital Partners, Stata Venture Partners (founded by by Ray Stata, founder and chairman of Analog Devices,) and Harris & Harris Group. Nantero previously raised $15m in its C round in March 2005, $10.5m in September 2003 and $6m in October 2001.

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