Baker Brothers Investments is a financial organization. Nothing is publicly known about the organization other than this announcement
| Company | Date | Round | Size | Participants |
| Aquinox Pharmaceuticals | 4/13 | Series C | $18M | 5 |
| Synageva BioPharma | 3/11 | Venture Round | $25M | 4 |
| Aquinox Pharmaceuticals | 6/10 | Series B | $25M | 4 |
| Synageva BioPharma | 10/09 | Series F | $12M | 5 |
| PharmAthene | 7/09 | Venture Round | $19.3M | 4 |
| Synageva BioPharma | 4/09 | Series F | $30M | 2 |
| diaDexus | 2/09 | Series F | $9.2M | 3 |
| Presidio Pharmaceuticals | 8/07 | Series B | $26M | 5 |
| Phenomix | 3/07 | Series C | $55M | 10 |
| diaDexus | 1/07 | Series E | $40M | 7 |