In September, 2012 Silicium Security was acquired by RSA, the Security Division of EMC:
http://www.emc.com/about/news/press/2012/20120919-04.htm
Founded in 1999, Silicium Security develops advanced computer security solutions for IT, Security and Incident Response professionals. We focus mainly on the development of behavioral malware detection systems for large Windows environments. Our flagship product, ECAT, is used by large organizations worldwide to assess the security of their environment and to quickly find the source of computer compromise. We also provide malware analysis support and training to users of our product.