Sienna Holdings is a privately held venture capital firm based in Sausalito, United States. They invest in high-quality, well-managed startups in the information technology sector. Sienna Holdings typically invests less than the average amount in lead investments and has a lower exit rate compared to other organizations. They are involved in less than 2 deals per year, with the highest number of exits occurring in 2004. The fund usually invests in deals ranging from $10 million to $50 million and prefers rounds with 3-4 participants. While Sienna Holdings is a notable investor, startups in their portfolio are often financed by other venture capital firms such as Synergy Ventures, Sierra Ventures, and SV Angel. The fund frequently receives investments in subsequent rounds from Worldview Technology Partners, Sierra Ventures, and SV Angel. Sienna Holdings focuses on investing in startups in the E-Commerce and Marketplace sectors, typically targeting companies that are one year old or less. The majority of their investments are made in the United States, aligning with the country of their foundation. Some of the notable companies in their portfolio include Zack Network, KnowledgeFirst, and AdFlight.