Not much is known on the internet about Madrone Capital Partners, other than this article describes them as “a Menlo Park-based private equity firm associated with Rob Walton, the eldest son of Wal-mart founder Sam Walton.”
| Company | Date | Round | Size | Participants |
| Achates Power | 10/09 | Unattributed | $12.1M | 4 |
| Enphase Energy | 5/09 | Unattributed | $22.5M | 5 |
| Cuil | 4/08 | Series B | $25M | 3 |
