Dominic Patrick O'Brien

Watch for changes

Where they hold approval

Firms where this individual holds — or has held — an FCA-approved role.

Citadel Advisors Europe Limited
FRN 952125
- [FCA CF] Client dealing (since 19 Mar 2025)
Balyasny Asset Management (UK) LLP (no longer approved here)
FRN 403302
- [FCA CF] Client dealing (19 Mar 2021 to 9 Sep 2024)
- CF30 Customer (15 Nov 2019 to 8 Dec 2019)
Morgan Stanley & Co. International Plc (no longer approved here)
FRN 165935
- CF30 Customer (20 Sep 2010 to 5 Apr 2013)

Updates to this individual's record on the FCA register.

No changes recorded yet.

A quick guide to the terms on this page.

The FCA: The Financial Conduct Authority is the UK's regulator for banking, lending, insurance, investments and payments. Senior staff at any authorised firm have to be approved by the FCA personally.
Approved individual: Someone the FCA has personally signed off to hold a senior role at an authorised firm — directors, compliance officers and similar. They're held accountable for the firm's conduct.
Controlled functions: The specific senior roles the FCA approves people to hold, like 'Compliance oversight' or 'Money laundering reporting'. Each approval is tied to a particular firm.
IRN: Individual Reference Number — the unique ID the FCA assigns to each approved person. It stays the same as they move between firms.

Information on this page is sourced from the official FCA register.