Guy Usher | Fieldfisher
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Professional background

Professional background

I advise on structured derivatives and securities financing in emerging and developed markets as well as credit, equity, fund, commodity and property derivatives, both OTC and exchange-traded. I also provide advice on netting, collateral, defaults, restructurings and disputes.

As one of the founding partners of our Condor alternative legal solutions platform, I continue to be actively involved in structuring and delivering ALS programmes for clients across Fieldfisher's focus sectors.

Awards & recognition

Awards & recognition

Chambers and Partners UK 2019
Guy Usher leads the firm's derivatives work and has deep experience operating in the space
Chambers and Partners UK 2019
[Guy Usher] is really knowledgeable and an expert in his field  
Client
The doyen of the derivatives market

Authored pieces

All Resources
Financial Services
Press Release

Fieldfisher re-brands its trading solutions arm as Fieldfisher Trading Legal Solutions

04.02.2025
Augmented capabilities in transactional documentation negotiation, bespoke legal training, legal opinion reviews, data extraction and documentation reviews & consolidation of legal know-howWholly owned subsidiary of Fieldfisher was founded in 2005 as Donaldson Legal Consulting.
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Abstract digital art featuring a 3D wavy landscape with vibrant colors of purple, pink, and blue. Numerous small data points and lines create a sense of motion and complexity, evoking themes of technology, data visualization, and modern digital landscapes.
Financial markets
Insight

The Designated Activities Regime

18.06.2024
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Publication

Emissions allowance financing – Structuring, legal and regulatory considerations

14.11.2023
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A vibrant digital graphic featuring a world map overlayed with candlestick charts and data points. The map is depicted with a blue and pink color scheme, and arrows indicate various stock prices and trends, set against a blurred, futuristic background.
Insight

Non-market risks in liability driven investment (LDI): Getting it right

26.09.2023
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Insight

UK UMR vs EU UMR – What do users of OTC derivatives need to know?

17.01.2023
This article discusses the most significant current and prospective differences between the uncleared margin rules ("UMR") under the European Market Infrastructure Regulation ("EU EMIR") and the UMR under the on-shored version that forms part of the UK's domestic law post-Brexit ("UK EMIR"). These articles will focus on the areas that are of most significance to counterparties to OTC derivatives.
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What others say…

Chambers and Partners UK 2019
Guy Usher leads the firm's derivatives work and has deep experience operating in the space
Chambers and Partners UK 2019
[Guy Usher] is really knowledgeable and an expert in his field  
Client
The doyen of the derivatives market