Semprius, a US-based solar company previously backed by Siemens, has taken the amount raised in its latest funding to $31.1m, according to a filing with the Securities and Exchange Commission on Monday.
The company had previously raised $20.6m as part of the same round, when it sold a 16% stake to German industrial conglomerate Siemens. Siemens led the series C round that month which also had backing from Applied Materials’ corporate venturing unit Applied Ventures and venture capital firms Arch Venture Partners, Intersouth Partners, and GVC Investment.
Semprius subsequently raised $3m on January 12 from venture firm Morgan Creek Capital Management, Illinois Emerging Technologies Fund, a fund managed by Illinois Ventures, and the CIA’s In-Q-Tel.
Semprius had previously raised $8.2m from a range of venture capital funds in its second round funding dating back to June 2009, as well as a $3m grant from the US Department of Energy in February 2010.