# Siege FX: Capital markets, London, United Kingdom

> Siege FX: Siege FX is a capital markets fintech company specializing in anonymous foreign exchange trading technology for institutional market participants.

Source: https://millionrounds.com/startup/siege-fx (Millionrounds; every figure on the page links to its filing or article)

United Kingdom · [Capital markets startup](https://millionrounds.com/companies)

# Siege FX

Siege FX is a capital markets fintech company specializing in anonymous foreign exchange trading technology for institutional market participants.

Funding reported Last round: Series A

Capital markets London, United Kingdom

Company summary

- **Founded:** 2017 9 years old
- **Team:** 24 11 to 50 people
- **Funding reported:** 9.2M as listed, currency not stated
- **Last round:** Series A Jan 2026

How sure we are

- ✓ **Listed** We know it exists and what it does
- 2 **Funding reported** A company dataset reports a raise
- 3 **Observed** A filing or a dated announcement confirms a round

No round for Siege FX has been confirmed by a filing or an announcement yet, so nothing here counts toward an investor's record. [How we decide](https://millionrounds.com/methodology)

## About Siege FX

Siege FX is a capital markets fintech company specializing in anonymous foreign exchange trading technology for institutional market participants.

The company offers a continuous, all-to-all spot FX mid-matching dark pool, designed to support leading financial institutions. Siege FX also provides cost-reducing solutions that originated in FX and may extend to other asset classes. Their services include anonymous FX trading infrastructure, a spot FX matching service, and an internal order compression and allocation product called Netbook, which caters to Spot, Forwards, Swaps, and NDFs. Siege FX serves a range of institutional clients, including major financial institutions, asset managers, and banks. The company operates from London and has additional offices in Boston, and is incorporated as Siege FX Limited in England and Wales.

## What company datasets say Siege FX raised

Funding, as reported

Reported in all **9.2M** in the source's currency

Last round **Series A**

Last round size **9.2M**

Last round date **Jan 2026**

## Funding filed with regulators

Siege FX filed 8 raises, $4.2M in all. Filings say how much was sold and to how many investors; they never name the investors.

- Mar 2025 **$511K** UK share allotment
- Sept 2024 **$1.2M** UK share allotment
- Mar 2024 **$217K** UK share allotment
- Jan 2024 **$935K** UK share allotment
- Jul 2023 **$163K** UK share allotment
- Apr 2023 **$267K** UK share allotment
- Mar 2023 **$722K** UK share allotment
- Jul 2022 **$168K** UK share allotment

## Founders and team

From Siege FX's own website: 6 on the team.

- **Claude Goulet** Chief Executive Officer
- **James Clinton** Chief Technology Officer
- **Marek Robertson** Chief Product Officer
- **Mathijs Peeters** Chief Revenue Officer
- **Nick Greenland** Head of Netbook
- **Stephen Rishworth** head of americas

## The company, in detail

What they build

Known for

fx liquidity pool passive liquidity sources liquidity aggregation algo trading fx trading risk controls information technology & services market data analytics dark pool financial services finance liquidity sourcing fx market fx trading infrastructure anonymous trading fx asset class expansion capital markets

Built with from their website

Amazon SES Atlassian Google Cloud CloudFlare Amazon Simple Email Service Varnish Apple Business Manager CloudFlare CDN React Microsoft Exchange

+8 more

Microsoft 365 Apps & Services Mobile Friendly Bootstrap Google Cloud CDN Cloudflare DNS HTTP/3 Wix Amazon AWS

- **Sector:** Capital markets
- **Industry code:** NAICS 5231, 541512, SIC 6211
- **Region:** England
- **Full record:** [Every detail in the company directory](https://millionrounds.com/directory/siege-fx)

## Capital markets in United Kingdom

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