FCA vs HTX: UK’s First Crypto Marketing Lawsuit Explained

The FCA is the UK’s financial watchdog. It doesn’t give warnings twice.

In October 2025, it filed a lawsuit against Huobi Global — the company behind the HTX crypto exchange — alleging that HTX had illegally marketed its services to British consumers. Now, nine months on, the two sides are in settlement talks. Court proceedings have been paused while they try to cut a deal.

This is not a minor regulatory skirmish. It’s the FCA’s first-ever court case against a crypto exchange over financial promotion rules. And the outcome could shape how every crypto company — registered or not — approaches UK users going forward.

What Are the UK’s Crypto Financial Promotion Rules?

Before getting into the lawsuit itself, it helps to understand what HTX is actually accused of breaking.

The FCA’s crypto financial promotion rules took effect on 8 October 2023. Under these rules, companies cannot market crypto products or services to UK consumers unless they are FCA-registered as a crypto firm, working in partnership with an FCA-registered firm, or specifically authorised to communicate financial promotions.

The rules were designed to protect ordinary people from being drawn into high-risk crypto products by slick advertising. They cover everything from social media posts and app-store listings to website landing pages that UK visitors can reach.

When I looked into this in the run-up to the rules going live, the FCA was remarkably clear about one thing: ignorance of the rules was not a defence. Companies operating globally would need to geo-restrict UK access or comply. Full stop. No grace period. No soft launch.

What Did HTX Actually Do?

HTX — formerly known as Huobi — is one of the world’s largest crypto trading platforms. It has been closely linked to Justin Sun, the founder of the Tron blockchain network, who acquired a controlling stake in the exchange in 2022.

After the UK marketing rules came into force in October 2023, HTX did not register with the FCA and did not appear to restrict access to its platform from British users. The regulator alleges the exchange continued to promote its services to UK consumers in breach of the new regulations.

The FCA added Huobi to its warning list — a public list of unauthorised firms — in 2023, and added HTX separately in 2024. Warning list entries do not carry criminal penalties on their own, but they signal to UK consumers that a firm has no regulatory standing here. HTX has maintained that its products and services are “not intended” for UK customers. The FCA, however, says the evidence tells a different story.

How the Lawsuit Started

The FCA filed its claim in October 2025 against Panama-incorporated Huobi Global and unidentified individuals alleged to operate and control HTX. This was not a sudden move. The regulator had spent months trying to engage with the exchange before resorting to court action.

Court documents reviewed by Reuters show the FCA made repeated requests to communicate with HTX. Those requests went unanswered. The exchange was described as operating through an “opaque operational structure” — a phrase that signals the FCA found it genuinely difficult to identify who was legally responsible for what.

Eventually, both sides agreed to halt formal proceedings so that negotiations could begin. The High Court paused the case to give them room to talk.

Settlement Talks: Where Things Stand Now

In early March 2026, HTX and the FCA began exchanging emails. Those exchanges led to formal settlement discussions that ran for three months. On 25 June, a High Court order extended the negotiation window by a further two months — putting the current deadline in late August 2026.

Neither side has disclosed what a settlement might involve. No fine amount, no public apology, no remediation plan — nothing has been made public. Both the FCA and HTX declined to comment on the ongoing negotiations when contacted by Reuters.

UK investors keep asking about this case because the stakes are unusually high. If the FCA wins outright in court, it could set a precedent for how aggressively the regulator pursues other unregistered exchanges operating in the UK. A settlement might still carry weight — but probably less than a full court judgment. Either way, the outcome matters beyond HTX itself.

It’s also worth noting that this case will likely determine how the FCA proceeds against other large offshore exchanges that still serve UK users without proper authorisation. The HTX lawsuit is, in that sense, a test case for the whole regime.

Justin Sun and the Tron Connection

It’s worth being clear about what HTX is and who is behind it.

Huobi launched in 2013 in China and grew into one of the world’s top-five crypto exchanges by trading volume. Justin Sun — who also runs the Tron blockchain network — took a significant stake in the exchange in September 2022. The exchange was rebranded from Huobi to HTX in September 2023. That rebrand happened just weeks before the UK’s financial promotion rules came into force.

Sun is a polarising figure in the crypto world. He has a large social media following and a track record of high-profile promotional activity. The FCA’s decision to sue rather than simply warn reflects how seriously it views the alleged breach. This isn’t an obscure firm that slipped through the cracks.

HTX also faces separate UK and EU sanctions, though those relate to different alleged conduct. The marketing lawsuit is distinct from those measures.

What the Rules Actually Prohibit

A plain English summary — because this matters for understanding what HTX stands accused of.

“Financial promotion” under UK law means any communication that invites or induces someone to engage in investment activity involving a financial product. Since October 2023, the FCA has explicitly classified cryptoassets — including Bitcoin, Ether and most tokens — as financial products for this purpose.

Without proper FCA authorisation, exchanges cannot legally do any of the following for UK audiences:

• Run paid social media advertising targeting UK users
• Send email campaigns to UK addresses promoting their platform
• Maintain website pages accessible to UK residents without geo-blocking
• List their app on UK stores with promotional copy
• Work with influencers to promote their exchange to UK followers
• Feature on comparison sites aimed at UK investors

The rules apply even if the exchange is not based in the UK. Operating from Panama, the Cayman Islands or anywhere else does not grant immunity from UK promotion law. What matters is whether UK consumers can see and act on the promotion.

I’ve seen this pattern with a number of exchanges since 2023: when the rules came into force, several quietly geo-blocked UK traffic rather than navigate the FCA registration process. HTX, according to the regulator, did not take that route.

What the FCA Has Done Since the Rules Came In

The FCA did not sit back and wait for complaints to arrive. In the weeks after October 2023, it sent warnings to more than 140 firms it believed were operating in breach of the new rules.

It also issued public alerts naming specific exchanges on its warning list. These are not toothless moves — a warning list entry can trigger restrictions from UK banks, payment processors and app stores. Some exchanges found UK-facing payment rails shut off almost immediately after being listed.

The HTX case went a step further. Filing a High Court claim is a significant escalation. The regulator is not just flagging a concern; it is attempting to establish legal liability in front of a judge. That’s a different category of action — one that carries real consequences if the FCA wins.

The FCA has been public about its intentions in this space. Enforcement action against firms operating outside its rules is not a last resort; it’s a core part of how the regulator intends to make the financial promotion rules stick.

What This Means for UK Crypto Users

If you use HTX — or any exchange that is not FCA-registered — you have fewer protections than you might assume.

The UK’s Financial Services Compensation Scheme (FSCS) does not cover losses from unregulated crypto firms. If an unregistered exchange freezes withdrawals, gets hacked, or collapses, you have no legal right to compensation under UK law. That is not a hypothetical risk. Several exchanges have done exactly that in recent years, leaving UK users with no recourse.

This does not mean that registered exchanges are safe investments. Crypto is genuinely high-risk regardless of regulatory status. But FCA registration means the firm has passed at least basic checks, and you have legal standing to complain if something goes wrong.

The FCA’s register of crypto firms is public and free to search at fca.org.uk. Checking whether an exchange appears there takes under a minute. UK investors who skip that step are layering regulatory risk on top of the market risk that already comes with crypto.

As for HTX specifically — the settlement talks are ongoing. Until they conclude, the exchange’s standing with the FCA remains unresolved. The August deadline is approaching fast.

This article is for educational purposes only and does not constitute financial advice. Cryptocurrency investments involve significant risk. Always do your own research.