Clifford Chance
Olivier Plessis has extensive experience in US, European and international securities offerings, particularly in debt and equity capital markets.
Olivier advises issuers, shareholders, private equity sponsors and underwriters on a variety of international securities offerings, including investment grade, high-yield and sovereign bond offerings and IPOs, capital increases and rights offerings.
Olivier has advised on:
- the investment grade and high yield debt offerings of Vinci, Pernod Ricard, BUT/Conforama, TSKB, OCP, Oman, Solvay, Total, the Council of Europe Development Bank, Lazard and others.
- the IPOs of InPost (largest ever tech IPO in Europe), Exclusive Networks, ACWA Power, Adyen (IFLR Equity Deal of the Year), Network International (IFR EMEA IPO of the Year), Arabian Centres Company (IFLR ME Equity Deal of the Year), ALD, NLB and others
- the rights issues and capital increases of Euronext, Aedifica, Solvay, Nicox, Fastned, Shurgard, Fiat-Chrysler, Cofinnimo, Montea, Home Invest and others
- VINCI on its inaugural $1 billion Rule 144A Yankee bond offering
- Exclusive Networks and Permira on the IPO and Euronext Paris Listing of Exclusive Networks
- SMCP on the refinancing of its existing high-yield notes and other outstanding debt
- Citi, Goldman Sachs and JP Morgan on InPost’s €3.2 billion IPO and listing on Euronext Amsterdam (the largest ever European Tech IPO)
- The initial purchasers on the proposed 144A high-yield offering of BUT and Conforama
- Bank of America, Credit Agricole, JP Morgan and HSBC on the €1.8 billion rights offering of Euronext for the €4.4 billion acquisition of Borsa Italania
- OCP on its 144A bond offerings and liability management
- Adyen on its €1 billion IPO and Euronext Amsterdam listing (IFLR Equity Deal of the Year)
- ALD and Société Générale on the €1.3 billion IPO and Euronext Paris listing of ALD (one of the largest IPOs in France in recent years)
- The dealers on TSKB's multiple 144A bond offerings
- Citi and JP Morgan on the $1.6 billion IPO and premium London listing of Network International (IFR EMEA IPO of the Year)
- The underwriters on Solvay's rights issue and Rule 144A debt offering for the $6.8 billion acquisition of Cytec in the US
- ACWA Power on its US$1.2 billion IPO and US$10.9 billion listing on the Tadawul
- The Government of Oman on over $20 billion in Rule 144A debt offerings
- NLB on its €670 million IPO and listing on the London and Ljubljana Stock Exchanges
- TOTAL on more than $10 billion in US registered debt offerings
- Citi on the IPO and premium London listing of ASA International
- The Council of Europe Development Bank on numerous debt offerings under its registered US shelf program
- Arabian Centre’s $750 million IPO, the first ever Rule 144A Saudi IPO (Middle East IPO of the Year – IFLR)
- Citi and Goldman Sachs in connection with the US registered offering of debt securities issued by Lazard Group
- Fiat Chrysler Automobiles on its offering of approximately $1.1 billion NYSE-listed common shares and $2.875 billion of mandatory convertible securities
News and client work
Contact details
- Clifford Chance, Paris
- +33144055487
- Email me
- Speaks English and French
- Practice area Global Financial Markets, Capital markets
- Sector Consumer goods & retail, Healthcare, life sciences & chemicals, Banks, Insurance, Telecommunications, media & technology, Transport & logistics, Energy & resources
Career and qualifications
- McGill Faculty of Law (LL.B/B.C.L) (JD equivalent) 2009
- Law Clerk to the Hon. Justice Rosalie S. Abella, Supreme Court of Canada 2009
- Admitted as an Attorney-at-Law in New York 2010
- Sullivan & Cromwell LLP, New York and Paris 2010
- Joined Clifford Chance 2015
Professional bodies
- American Bar Association
Awards and citations
- Olivier Plessis is ranked as one of the "Leading associates" for the practice.
‘Olivier Plessis is a brilliant lawyer and an excellent professional.'
Legal 500 EMEA 2025, Capital markets: equity capital markets - France - Olivier Plessis is ranked as one of the "Leading associates" for the practice.
Legal 500 EMEA 2025, Capital markets: debt capital markets - France - Olivier Plessis (Up and Coming) is a dual-qualified partner in New York and Paris, and is recognised for his expertise in US securities deals in the French market.
"Olivier's strength goes beyond US securities law advice; he is one to follow in the next few years."
Chambers France 2025, Capital Markets: Equity
Chambers Global 2025, Capital Markets: Equity - France - Olivier Plessis is ranked as "Rising Star".
IFLR 2024, Capital Markets : Debt, Capital Market : Equity - France - Olivier Plessis (Up and Coming) enters the rankings this year in recognition of his assistance on international IPOs and rights issues. He is also capable in debt capital markets matters.
"Olivier Plessis is a rising star."
Chambers Europe 2024, Capital Markets: Equity - France
Chambers Global 2024, Capital Markets: Equity - France - Olivier Plessis is ranked as "Rising star".
IFLR 2023, Capital Markets: Debt, Equity - France
- Olivier Plessis is ranked as one of the 'Rising Stars' for the practice.
Legal 500 EMEA 2023, Capital Debts: Debt Capital Markets - France - Olivier Plessis is ranked as "Rising Star".
IFLR 2022, DCM, ECM - France - "Olivier Plessis is a remarkable lawyer, his advice is of excellent quality, he is efficient and listens to his clients. I highly recommend him." "…counsel Olivier Plessis is growing a profile in US securities work". Ranked as a "Rising Star".
Legal 500 2022, Debt Capital Markets - "Alex Bafi and Olivier Plessis are great specialist lawyers and great to work with". Ranked as a "Key Lawyer".
Legal 500 2022, Equity Capital Markets - Olivier Plessis is listed as a "Rising star".
IFLR 2021, Equity Capital Markets, Debt Capital Markets - Olivier Plessis is listed as a "Rising star".
IFLR 2020, Capital Markets, Capital Markets : Equity, Capital Markets : Debt - France