Skip to content

Sylvia Kierszenbaum



Kierszenbaum Sylvia
Sylvia Kierszenbaum



Sylvia focuses on the regulation of banking and insurance activities and financial services. She also specialises in areas including capital markets, financial instruments, structured finance transactions, securitisations and trade receivables finance, covered bonds, funds, corporate reorganisations, corporate finance and bank lending.

Prior to joining the Banking & Finance department, Sylvia also worked for ten years at A&O Belgium’s Corporate department, where she covered corporate law. Sylvia regularly publishes articles on financial regulation and capital markets, and she consistently receives praise for her expertise in legal directories.

Experience highlights



Allen & Overy (Belgium) LLP
Uitbreidingstraat nr 72/b3

View office →



Exempt European lawyer, England and Wales, 2004

Admitted as “advocaat / avocate” (Belgium), 1992


LLM, Cornell University, 1989

Law Degree, Universitaire Instelling Antwerpen, 1988


Awards & accolades

Client Choice Award for Capital Markets

Client Choice, 2015

Published work

Kierszenbaum, S. and De Waele, N. (2018) “MiFID II rules on conflicts of interest and inducements: reinforcement of the MiFID I framework.” chapter in “MiFID II & MiFIR: Capita Selecta”, 2018, p. 115-153, Brussels: Anthemis

Kierszenbaum, S. and de Backer, A., (2018) “The new Belgian Prospectus Law”, Brussels: Allen & Overy LLP

Kierszenbaum, S., de Backer, A., and De Waele, N. (2017) “FSMA communication on the application of the Belgian rules on unfair contract terms to investment instruments”, Brussels: Allen & Overy LLP

Kierszenbaum, S., Rutten, S., Van de Wiele, W. and de Backer, A. (2016) ‘The Market Abuse Regulation: Key implications for listed issuers’, Brussels: Allen & Overy LLP

News & insights

Publications: 15 OCTOBER 2020

The MiFID Review - a ‘stocktake’ on recent publications impacting wholesale financial markets participants

Over the last two months, the industry have seen a number of proposals from both the European Commission and ESMA in relation to the MiFID Review.

Read more

Publications: 17 APRIL 2020

MiFID 2.5 (or 3) – What you need to know during 2020

As required by the existing framework, the MiFID II review has begun but what is not clear at this stage is whether it will be a complete re-write or simply MiFID 2.5. 

Read more

Publications: 20 MARCH 2020

Covid–19 coronavirus: what should banks and other financial institutions focus on?

The Covid-19  pandemic presents an unprecedented challenge and will affect all walks of life.  The quantum of the impact is hard to determine at this stage although based on preliminary assessment and…

Read more
Brexit day 1 readiness for European banks and investment firms

Publications: 15 OCTOBER 2019

Brexit day one readiness for European banks and investment firms: risk, legal and compliance changes for EU firms under EU law

We examine some of the ways in which a hard Brexit will affect the EU legal and regulatory obligations of EU financial services firms facing or using UK clients/counterparties/market infrastructure.

Read more