Greylock Partners is a venture capital firm specializing in startup, early venture, mid venture, late venture, and growth capital investments. It is also capable of making secondary investments. It invests in two main sectors: consumer and enterprise. Under the consumer sector, Greylock Partners invests in advertising, commerce, gaming, media, mobile, services, social, marketplace, consumer internet, enterprise, social gaming, online marketplaces, payments, services and social networks, and information technology. Within enterprise, it invests in applications, cloud/SaaS, data center, management, enterprise information technology Infrastructure, networking, security, storage, infrastructure, open source, software, information technology, application infrastructure, and new enterprise applications.Since 1965, Greylock Partners has worked with hundreds of companies, 150 of which have gone on to IPOs and 100 of which have gone on to profitable M&A events. Such companies include Ascend Communications, CheckFree, CipherTrust, Constant Contact, Continental Cable, Decru, Data Domain, and more.Current Greylock portfolio companies include Apptio, Cloudera, Facebook, LinkedIn, and more. Greylock invests in seed stage companies through its Greylock Discovery Fund, early stage companies through Greylock XIII, and late stage companies through Greylock Growth.Greylock Partners also invests in the biotechnology, internet service providers, and semiconductor sectors.Greylock Partners was founded in 1965 and is based in Menlo Park, California with an additional office in Cambridge, Massachusetts.