Michael Mainelli

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Michael Mainelli
Alma materHarvard; TCD; LSE (PhD)
EmployerZ/Yen Group
Elisabeth Reuß
(m. 1996)
MStJ insignia

Michael Raymond Mainelli MStJ (born 1958), Chairman of Z/Yen,[1] served as a Sheriff of the City of London from 2019–2021. He is an Emeritus Gresham Professor of Commerce at Gresham College,[2]and founder of the Long Finance initiative. He has been Alderman for Broad Street Ward in the City of London since 2013, and was elected Aldermanic Sheriff on 24 June 2019.[3]


Mainelli attended Harvard College, Trinity College Dublin and the London School of Economics and Political Science.


His early scientific research in aerospace and computer graphics led to him to start Swiss companies in seismology, cartography and energy information from 1979-84. He produced a digital map of the world in 1983, Mundocart,[4] and the $20 million Geodat cartography project from 1980-84.[5] After joining Arthur Andersen in 1985, Mainelli became a senior partner and board member of the accountancy firm BDO Binder Hamlyn from 1987-94.[6]

Mainelli lectured on new concepts of money and the role of government,[7][8][9] publishing 28 one-hour lectures on commerce at Gresham College in the City of London while serving as Mercers' School Memorial Professor of Commerce from 2005 to 2009. The theme of his programme was "Society’s Commercial Choice – Risks and Rewards of Markets".[10]

In 2005 Mainelli, in conjunction with Gresham College, the City of London Corporation and financial institutions, launched Long Finance's London Accord,[11] an agreement to share environmental, social and governance research with policy makers and the public.[12] While co-founding Z/Yen in 1994, Mainelli undertook merchant banking with Deutsche Morgan Grenfell and was Corporate Development Director of an R&D organisation, then the UK Ministry of Defence's Defence Evaluation and Research Agency, DERA (now largely Qinetiq and the Defence Science and Technology Laboratory) leading to two privatisations. At Z/Yen, Mainelli established the Global Financial Centres Index, The London Accord, Long Finance, the Global Intellectual Property Index, the Global Green Finance Index, the Smart Centres Index, the Farsight Award, and other financial services initiatives. His area of current research includes the Distributed Futures research programme and he speaks on his research on 'smart ledgers' (aka blockchains) as well as other technologies.[13]

Mainelli is a chartered certified accountant (FCCA), computer specialist (FBCS, CITP), securities professional (FCSI(Hons)) and management consultant (FIMC, CMC).[14] He is a non-executive Director of the United Kingdom Accreditation Service[15] (the UK's national body for standards and laboratories) where he is a proponent for competitive standards markets, and an AIM-listed company, Wishbone Gold plc.[16] He is a Fellow and Trustee of Gresham College,[17] Visiting Professor at UCL's Bartlett School, Honorary Fellow of King's College London, and a former visiting professor of the London School of Economics.[18]

In 2013, Mainelli was elected Alderman of Broad Street ward for the City of London Corporation.[19] In 2015 he was awarded the title of Consigliere del Senato Accademico of L’Accademia Tiberina.[20] In 2020, having been a trustee from 2008, he was made an Honorary Life Fellow of Gresham College. He has held advisory posts at City University, Hitachi UK, and HM Treasury.[21] Michael is Past Master of the Worshipful Company of World Traders for 2017–18, and an honorary liveryman of the Furniture Makers, Water Conservators, Marketors, Tax Advisers, and International Bankers, an honorary freeman of the Educators, as well as a Craft-Owning Freeman of the Watermen & Lightermen.

Mainelli was elected Sheriff of the City of London on 24 June 2019 and assumed office on 27 September 2019.[3] Due to the COVID-19 pandemic, he was asked by the electorate, and accepted, to extend his term till September 2021.[22]

Awards and honours[edit]


Mainelli has published around 50 journal articles, 200 commercial articles[25] and four books, including the novel, "Clean Business Cuisine: Now and Z/Yen",[26] written with Ian Harris.[27] Mainelli's economics book, "The Price of Fish",[28] also written with Ian Harris, applied his Gresham lecture series ideas to 'wicked problems'. "The Price of Fish" won the 2012 Independent Publishers Gold Award for Finance, Investment and Economics.[29]



  • Michael Mainelli and Ian Harris, Clean Business Cuisine: Now and Z/Yen, Milet Publishing (2000), ISBN 1840592273, 160 pages.


Personal life[edit]

Mainelli married in 1996 Elisabeth (née Reuß, 1964)[30] and together they undertook the restoration of the Thames sailing barge Lady Daphne,[31] while he still lectures on, and supports, sailing barges and their history.[32] He has been an International Member, International Financial Services Industry Advisory Committee, Office of the TaoiseachDublin, Ireland since 2015.[33]


Coat of arms of Michael Mainelli
Heraldic Achievement of Michael Mainelli.svg
Upon a Helm with a Wreath Argent and Sable Standing upon a Dice Sable manifesting a two and a five Argent a Puffin proper winding Bagpipes with blowstick chanter and two drones Sable the chanter held by the wing tips the drones tasseled Vert the bag Argent charged with a Compass Rose Gules and holding in the dexter foot a Merchants Purse with drawstrings tasseled Or Mantled Party Vert and Purpure lined Argent
Argent within a Pretzel Knot of five loops Sable interlaced with another Gules the outer part of each loop enclosing a Yin Yang Symbol Sable and Argent the Sable outwards the roundels Argent charged with a plus sign and the roundels Sable with a minus sign all counterchanged an Analemma palewise the small loop upwards Gules interlaced with three Arrows points upwards one in pale and two in saltire Sable
ORDO EX χάος
(Order from Chaos)
Badge of a Member of the Order of St John


  1. ^ "Archived copy". Retrieved 1 July 2019.
  2. ^ "Gresham College – Professor Michael Mainelli". Gresham College. Retrieved 10 July 2019.
  3. ^ a b "City elects Sheriffs of London for 2019 – 2020". City elects Sheriffs of London for 2019 – 2020.
  4. ^ "Mundo Cartográfico". www.mundocartografico.com.
  5. ^ "Member details - Professor Michael Raymond Mainelli (Alderman)". democracy.cityoflondon.gov.uk. 26 January 2023.
  6. ^ "Culture and Impact Report". www.bdo.co.uk.
  7. ^ "Long Commerce: Transactions Across Time". Gresham College. Retrieved 10 July 2019.
  8. ^ "The Currency of Management: What Managing Money Teaches Us About Managing People". Retrieved 28 December 2013.
  9. ^ "The Study of Money May Be The Root of Much Madness: The Fragile Foundations Underneath Economics". Retrieved 21 November 2015.
  10. ^ "Take My Profits Please! Volatility Reduction And Ethics". Gresham College. Retrieved 10 July 2019.
  11. ^ Gunten, Chiara von. "London Accord". www.longfinance.net. Retrieved 10 July 2019.
  12. ^ "Welcome to Long Finance". London-accord.co.uk. Retrieved 10 July 2019.
  13. ^ "Blockchain believers seek to shake up financial services". Financial Times. Archived from the original on 21 March 2016. Retrieved 22 April 2017.{{cite news}}: CS1 maint: bot: original URL status unknown (link)
  14. ^ "ICMCI". www.cmc-global.org.
  15. ^ info@ukas.com. "Structure of UKAS". Ukas.com. Retrieved 10 July 2019.
  16. ^ "Wishbone Gold Plc - Directors & Management".
  17. ^ "Welcome - Mainelli.org". www.mainelli.org.
  18. ^ "Visiting professor". LSE. 11 January 2011. Retrieved 31 December 2011.
  19. ^ "Archived copy". Retrieved 10 July 2019.
  20. ^ "Accademia Tiberina". Accademia Tiberina.
  21. ^ "[ARCHIVED CONTENT] Report of Professional Services Global Competitiveness Group". HM Treasury. Retrieved 31 December 2011.
  22. ^ "Lord Mayor and Sheriffs to continue in office until 2021 | Worshipful Company of International Bankers".
  23. ^ "Individual | Photos | 2004 Awards | IT Industry Awards Archive | UK IT Industry Awards 2011 | Awards and Competitions | Products, Services and Events | BCS – The Chartered Institute for IT". BCS. Retrieved 31 December 2011.
  24. ^ "Order of St John | The Gazette". www.thegazette.co.uk.
  25. ^ "Welcome to Z/Yen". Zyen.com. Archived from the original on 10 February 2013. Retrieved 31 December 2011.
  26. ^ "Welcome to Z/Yen". Zyen.com. Retrieved 31 December 2011.
  27. ^ "Clean Business Cuisine Review". Zyen.com. Retrieved 10 July 2019.
  28. ^ Harris, Ian; Mainelli, Michael (13 October 2011). "The Price of Fish: A New Approach to Wicked Economics and Better Decisions". Nicholas Brealey Publishing – via Amazon.
  29. ^ "2012 Independent Publisher Book Awards Results". Independent Publisher - feature.
  30. ^ "Castle Debates". Castle Debates.
  31. ^ "Home". Lady Daphne. Retrieved 10 July 2019.
  32. ^ "City Guides Lecture 4 April 2016" (PDF).
  33. ^ Brona, Olwill. "Taoiseach, launching the IFS 2020". www.taoiseach.gov.ie.
  34. ^ "'The Mainelli Coat of Arms'". Archived from the original on 11 February 2022. Retrieved 22 September 2022.

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