Company · London
Osttra SEF Limited
Activities auxiliary to financial intermediation n.e.c.
Official record Companies House · updated 27th September 2026 · Sources
Network
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Who leads it
Previous officers 26
- Paul Houston 2024-2025 View profile
- Serge Robitaille Marston 2022-2025 View profile
- William Frederick Knottenbelt 2020-2022 View profile
- Christopher King Bowen 2019-2020 View profile
- Adrienne Hilary Seaman 2019-2025 View profile
- Carrie Di Santo 2019-2020 View profile
- Timothy Michael Cartledge 2018-2019 View profile
- Jeffrey William Ward 2017-2023 View profile
- Robert Charles Standing 2017-2019 View profile
- Seth Johnson 2016-2019 View profile
- Ian Brett Chicken 2016-2018 View profile
- Ivan Robert Ritossa 2016-2019 View profile
- Gil Mandelzis 2016-2016 View profile
- Jason Todd Cohen 2014-2019 View profile
- Darryl Guy Hooker 2014-2017 View profile
- John Edwards 2011-2014 View profile
- Steven James Toland 2008-2011 View profile
- Donald Mcclumpha 2007-2008 View profile
- Stephen Gerard Caplen 2007-2014 View profile
- David James Muddiman 2023-2025 View profile
- Sarah Giffen 2023-2025 View profile
- Margaret Austin Wright 2021-2023 View profile
- Jenelle Marie Chalmers 2021-2023 View profile
- Veronica Holly Ridley 2019-2021 View profile
- Deborah Anne Abrehart 2016-2019 View profile
- Teri-Anne Cavanagh 2007-2016 View profile
Directors and secretaries as filed at Companies House.
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About
- What it does
- Activities auxiliary to financial intermediation n.e.c.
- Incorporated
- 26/06/2007
- Registered office
- London
- Previous names
- NEX SEF Limited (until 03/11/2025)
EBS Global Facility Limited (until 30/01/2017)
MY Treasury Limited (until 16/03/2016)
Flightscreen Limited (until 05/07/2007)
Ownership
Owned by (2) iOwned byIndividuals and companies registered as having significant control over this company, from the Companies House PSC (persons with significant control) register. People whose ownership could not be confirmed to one individual are not listed as confirmed owners.
- Osttra Holdings Limited
75-100% shares, 75-100% voting, appoints directors · notified 2025-10-10 - NEX Markets Limited ceased 2025-10-10
75-100% shares, 75-100% voting, appoints directors · notified 2016-04-06
Group
- Osttra SEF Limited
is controlled by Osttra Holdings Limited
Evidence
active 75-100% shares, 75-100% voting, appoints directors · notified 2025-10-10 · source: Companies House PSC register - Osttra Holdings Limited
is controlled by NEX Optimisation Limited
Evidence
ceased 25-50% shares, 25-50% voting, appoints directors · notified 2024-11-19, ceased 2025-10-10 · source: Companies House PSC register - NEX Optimisation Limited
is controlled by NEX Group Holdings Limited
Evidence
active 75-100% shares, 75-100% voting, appoints directors · notified 2016-04-06 · source: Companies House PSC register - NEX Group Holdings Limited
is controlled by NEX International Limited
Evidence
active 75-100% shares, 75-100% voting · notified 2016-04-06 · source: Companies House PSC register - NEX International Limited
is controlled by CME London Limited
Evidence
active 75-100% shares, 75-100% voting, appoints directors · notified 2019-03-28 · source: Companies House PSC register - CME London Limited
is controlled by Norose Company Secretarial Services Limited
Evidence
ceased 75-100% shares, 75-100% voting, appoints directors · notified 2018-03-26, ceased 2018-03-26 · source: Companies House PSC register - Norose Company Secretarial Services Limited
is controlled by Norton Rose Limited
Evidence
active 75-100% shares, 75-100% voting, appoints directors · notified 2016-04-06 · source: Companies House PSC register - Norton Rose Limited
is controlled by Norton Rose Fulbright LLP
Evidence
active 75-100% shares, 75-100% voting, appoints directors · notified 2016-04-06 · source: Companies House PSC register
Ultimately controlled by Norton Rose Fulbright LLP.
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- 12597360
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- 12429294
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Showing the first 50.
Ownership paths are calculated from Companies House persons-with-significant-control filings. Each step shows the filed nature of control and dates; a step marked "ceased" is historical, not current.
Board analysis
Board DNA
How this board is put together, from the Companies House officer record and Charity Commission trustee records - deterministic, no AI.iBoard compositionCounted from the dated Companies House officer record: the current directors only, past directors excluded.
5 directors on the board
- Guy Warren Simpson Rowcliffe Director · appointed 2025
- Kirston Gareth Winters Director · appointed 2025
- Erik Petri Director · appointed 2025
- Timothy Stix Bitsberger Director · appointed 2020
- Deborah Lucas Director · appointed 2020
2.7y median 0.8y
average tenure
5.6y
longest tenure
0
directors past 6 years
First-time vs portfolio directors
First-time (3)
- Erik Petri Director · appointed 2025
- Timothy Stix Bitsberger Director · appointed 2020
- Deborah Lucas Director · appointed 2020
Portfolio (2)
- Guy Warren Simpson Rowcliffe Director · appointed 2025
- Kirston Gareth Winters Director · appointed 2025
0
also govern a charity
Left in the last 12 months
- Serge Robitaille Marston Director · appointed 2022 · resigned 2025
- Adrienne Hilary Seaman Director · appointed 2019 · resigned 2025
- Paul Houston Director · appointed 2024 · resigned 2025
Where else this board sits iWhere else this board sitsThe charitable fields these directors govern in elsewhere, by Charity Commission classification. Excludes this company and any charity it is the legal face of.
Finance 6Tech and media 6
The sectors these directors govern in elsewhere. This company, and any charity it is the legal face of, are excluded - counting them would just tell you what you are already looking at.
Gaps to watch
- Narrow spread of sectors across the board
Where to look Suggested search: directors from a wider range of sectors.
Sources
Official record from Companies House. Governance Register calculates the connections.
Record details
- Company number
- 06292563
- Status
- Active
- Type
- Private Limited Company
- Accounts next due
- 30/09/2027
- Edition
- Register edition compiled 27th September 2026
- Labels
- Official record from Companies House · Calculated derived by Governance Register.
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