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Portfolio Companies
|  | Chelsio Communications, Sunnyvale, CaliforniaChelsio provides high-speed protocol-acceleration products to manufacturers of server, storage, and data-communications equipment.http://www.chelsio.com/
|  | Identity Engines, Inc. acquired by Nortel
Identity Engines sells network-focused, identity management systems to enterprise customers.
http:www.idengines.com/
|  | InfiniRoute Networks, acquired by Transaction Network Services (NYSE:TNS)InfiniRoute Networks provides fully managed Voice over IP (VoIP) peering services for wire-line and wireless carriers who need PSTN-quality VoIP connections worldwide.http://www.tnsi.com/
|  | Sensys Networks, Berkeley, CaliforniaSensys Networks sells wireless sensor networking devices for Intelligent Traffic Systems, ITS, such as freeway and arterial traffic monitoring, and intersection traffic signal control. http://www.sensysnetworks.com/
|  | Venturi Wireless, Sunnyvale, CaliforniaVenturi Wireless enables enterprises and carriers to significantly accelerate content delivery over any wired or wireless wide area network. http://www.venturiwireless.com/
| Prior Investments by Horizon Managing Directors
|  | AudioTalk Networks (acquired by HearMe) Mountain View, CaliforniaAudioTalk was a provider of Internet voice and IP telephony technologies to Web businesses. The company was acquired by HearMe in 2000.http://www.hearme.com/
|  | Harmonic, Inc. (NASDAQ: HLIT) Sunnyvale, CaliforniaHarmonic Inc. is a leading provider of broadband optical networking and digital video systems to cable, satellite, terrestrial, telecom and wireless operators. http://www.harmonicinc.com/
|  | Palm™, Inc. (NASDAQ: PALM), Santa Clara, California
Palm™, Inc. is the leading pioneer in mobile and wireless personal digital assistant, PDA, solutions.
http://www.palm.com/ |  | RapidStream, Inc. acquired by WatchGuard Technologies (NASDAQ: WGRD) Santa Clara, CaliforniaRapidStream, Inc. develops third generation network security appliances that simultaneously deliver high performance VPN, firewall, quality-of-service, network address translation, load balancing and hacker defense. http://www.watchguard.com/
|  | Sandpiper Networks, Inc. acquired by Cable & Wireless America (NASDAQ: SVVS) Westlake Village, CaliforniaSandpiper Networks, Inc. is a provider of adaptive content distribution services. http://www.savvis.net/
|  | SpectraLink Corporation, acquired by Polycom (NASDAQ: PLCM),Boulder, ColoradoSpectraLink Corporation is the market leader in providing wireless telephone systems for the workplace. http://www.polycom.com/
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