John Taysom

Non-Executive Director and Co-Founder at Privitar Ltd

NED and Co-founder, Privitar
Honorary Visiting Professor, UCL Department of Computer Science
Continuing Policy Fellow, Centre for Science and Policy

As Managing Partner of Reuters Venture Capital (RVC), John Taysom founded Greenhouse Fund as Reuters’ venture capital arm in California in 1995. He joined Reuters in 1982, and was responsible for initiating products involving delivering data, video and transaction services over private networks, wireless networks and the Internet. From 1994 to 1997, he was based in Palo Alto, California, developing ways for Reuters to profit from the Internet. In 1995, he made the first Greenhouse investment in Yahoo; he continued to exploit his knowledge of network technologies to build the Greenhouse Fund into a significant venture capital investor, with investments including Yahoo, Verisign,, Infoseek, and Digimarc. He led the MBO of the Greenhouse Fund in 2001.

In 2011, John joined Harvard Business School as an Advanced Leadership Fellow, a cross-disciplinary preparation for a subsequent focus on socially impactful activity. He is now working on three social impact projects:

  • "Three is a Crowd" – a new way to look at online privacy involving staff at Harvard Law School, the Kennedy School and the computer science department
  • "WeNDY" – which seeks to stimulate a design-led approach to reducing the costs of an ageing population
  • "Footfall" – a project to stimulate very local attendance at music events, funded via an endowment, to encourage community building.
  • 23 March 2021, 5pm

    David Cleevely Annual Lecture: Professor Dame Angela McLean

    The inaugural lecture of the CSaP Annual Cleevely Lecture Series was delivered online by Professor Dame Angela McLean, Chief Scientific Adviser (CSA), Ministry of Defence.

  • 26 June 2019, 9:30am

    CSaP Annual Conference 2019

    CSaP's Annual Conference will bring together members of our network from government, academia and elsewhere to discuss some of the policy challenges we have worked on over the past year.

  • In news articles

    Privacy, secrecy, transparency: what does it mean for evidence based policy?

    What is preventing the use of personal data for evidence based policy? Drawing on rapidly evolving commercial best practice, what practical steps can be taken to overcome these obstacles? How can data science support policy?