| Investor Name | Invest Money | Lead Investor | Propotion | |
|---|---|---|---|---|
| US Department of Energy | - | - | - | Detail |
| Announced Date | Round | Money Raised | Investors | |
|---|---|---|---|---|
| Oct 13, 2009 | Series Unknown | $ 15M | ARCH Venture Partners | Detail |
| May 1, 2006 | Series B | $ 7.50M | ARCH Venture Partners | Detail |
| Jan 6, 2010 | Series D | $ 18M | ARCH Venture Partners | Detail |
| Oct 11, 2007 | Series C | $ 28M | ARCH Venture Partners | Detail |