At Castile our signature is the high degree of value-added support we bring to each company we invest in. In addition to capital, we bring to our portfolio companies industry-specific expertise, market insight and an extensive network of contacts benefiting the company’s development and overall value creation.

We are proud of the close relationships developed with the management teams of our portfolio companies and the accessibility we offer those teams to our partners and our networks.


Ahura Ahura Corporation is developing a new generation of optical transport subsystems that employs advanced technologies to deliver a disruptive price/performance advantage compared to existing solutions. The company is built around a distinguished team of accomplished scientists, developers and manufacturing engineers, each with a strong track record in bringing advanced electro-optical systems to market. Ahura anticipates that telecommunications carriers worldwide will leverage the companyâs solutions to boost the capacity and capabilities of existing infrastructure and to substantially reduce the cost of new investments.


Aurora Networks designs, develops, and markets next-generation optical transport systems for broadband networks. The company's patent-pending fiber technology and unique architecture deliver massive increases in bandwidth when compared to traditional HFC networks, while at the same time bringing substantial savings in operating costs and reducing system complexity.

With Aurora Networks' transport systems, broadband service providers can build the networks that will deliver the coming generation of bandwidth-hungry entertainment, information and communications services at a cost comparable to today's HFC designs. In an environment where network infrastructure investments must meet increasingly stringent requirements for return-on-investment, Aurora Networks is well positioned to become a key player in the future of the broadband industry.


GeoTrust, Inc. is the leader in the emerging field of online trust. GeoTrust's comprehensive suite of services and leverage of strategic industry partnerships provide buyers and sellers with instant access to a participant's trust profile in an online transaction, greatly reducing the risk of business-to-business transactions in eMarketplaces.

Built upon a comprehensive collection of participant-disclosed, third party and customer feedback data that encompasses reputation, policies, practices and performance history, these trust profiles ensure that every digital handshake can be made with confidence.


PhotonEx Corp. is an emerging leader in 40 Gbps and faster smart photonic systems for the network core. The company is developing a new generation of optical network equipment that leverages unique optics and RF innovation to deliver line yields four times faster than today’s systems – without compromising on distance or capacity.

Designed from the outset to meet the demands of an era marked by explosive growth in network traffic, PhotonEx systems also address service providers’ business goals. Flexible stream services enable service providers to tap new revenue opportunities, while high spectral efficiency translates into lower operational costs.


Premonitia is developing the first of a new generation of service-level management solutions for large-scale public IP networks. The solution employs advanced analysis and intelligent self-learning techniques to predict and automatically self-heal network faults that would otherwise lead to degraded performance and downtime. It draws on unique technology developed at Rensselaer Polytechnic Institute during a multi-million dollar DARPA-sponsored research program.

Premonitia's solution will be easy to implement, since it is fully compatible with equipment already installed in IP networks worldwide. Network service providers, including carriers, ISPs, backbone providers, cable operators and CLECs, will use the solution to increase service uptime, while substantially reducing operating costs from fault management and network administration.


Quantiva’s mission is to make "utility-class" performance a reality for all businesses delivering content or applications over the Internet. To deliver on this mission the company has created a comprehensive performance management solution that leverages the latest developments in network engineering and statistical analysis and draws on extensive real-world experience optimizing performance for web-based applications.

Businesses using Quantiva’s solution gain a competitive advantage by enhancing their customers’ Internet experience. They also benefit from reduced cost and risk in offering service level agreements, enhanced visibility of outsourced services, reduced support costs, and more efficient use of network resources


RetailExchange.com was founded to create a powerful and efficient marketplace platform specifically designed to streamline the buying and selling of excess consumer goods. This marketplace leverages innovative technology to enable manufacturers to sell their excess inventory more quickly and more profitably than traditional channels, and to give gives retailers improved access to margin-enhancing off-price deals. Implemented with a deep understanding of the retail industry, the marketplace serves the industry’s need to execute these transactions without endangering the value of brands and sales channels.

As an independent business RetailExchange attained a leadership position in its target segment, selling tens of millions of dollars in excess inventory, and in November 2001 was acquired by Gordon Brothers LLC, the retail industry’s largest provider of asset disposition services.


Sonus Networks was founded with the mission of building carrier-class network solutions to facilitate the movement of telephony from circuit networks to packet networks and to enable a new generation of packet-based applications for integrated voice and data services. To deliver on this mission the company created an Open Services Architecture that enables carriers to rapidly develop new and innovative services, and implemented this architecture in a Packet Telephony Suite including media gateways, softswitches and network management systems.

Sonus completed a highly successful IPO in May 2000, and trades on Nasdaq under the symbol “SONS”. The company has established itself as a global leader in packet telephony with gateways and switches deployed in large numbers of service provider networks worldwide.


Stargus' mission is to enable broadband service providers to guarantee network performance and boost customer satisfaction by providing scalable systems for real-time monitoring and automated management of broadband networks.

The Stargus system has been developed by several of the key leaders responsible for developing DOCSIS, an international standard for broadband cable devices such as cable modems, set-top boxes, IP telephones and entertainment appliances. The Stargus system leverages this expertise to bring an unparalleled degree of visibility to, and control of, both network devices and services. With the Stargus system's comprehensive view of faults, congestion, security, availability and overall performance, broadband service providers can minimize slowdowns and outages, identify upgrade or reconfiguration requirements, and identify opportunities for revenue growth.





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