On-line Blockchain PLC, formerly On-line PLC, is a United Kingdom-based investment company. The principal activity of the Company is to hold an investment in a company that develops and exploits Internet content. It holds investment in ADVFN plc, which is engaged in the development and provision of financial information, primarily through the Internet, research services and the development and exploitation of ancillary Internet sites. ADVFN plc provides stock market data to the private investors and incorporates ALL IPO Plc, Throgmorton Street Capital and TSCTrade. ALL IPO Plc offers an online platform for the private investor to access new issue investments. Through a network of broker contacts, it offers a range of Initial Public Offering, Venture Capital Trust, Real Estate Investment Trust and Enterprise Investment Scheme investments. Throgmorton Street Capital is a boutique corporate broker. TSCTrade offers a traditional telephone-based dealing service for clients.