UK sanctions HTX as $1.5B in Kremlin-linked flows trigger crackdown

The UK sanctioned HTX, one of the world's five largest crypto exchanges, for allegedly moving $1.5 billion for Kremlin-aligned entities — the most significant crypto exchange designation under the Russia sanctions regime.

The UK sanctioned HTX, the crypto exchange formerly known as Huobi, for allegedly moving $1.5 billion for Kremlin-aligned entities, marking the most significant designation of a crypto exchange under the Russia sanctions regime. The Foreign, Commonwealth and Development Office designated 18 entities and individuals as part of a package targeting crypto networks used to evade sanctions by Russia.

"The FCDO alleges HTX moved approximately $1.5 billion for Kremlin-aligned entities through the A7 network," TRM Labs said in a compliance analysis published after the designation. The broader A7 network absorbed roughly $838 million after the Garantex takedown in March 2025, according to TRM's blockchain intelligence data.

Four individuals were also named, including Sergei Mendeleev, co-founder of Garantex. A7 LLC, one of the primary entities designated, is owned by Moldovan oligarch Ilan Shor and Promsvyazbank — a sanctioned bank that finances Russia's military. Two other entities beyond HTX drew attention: Rapira, a Georgia-based payment processor with a Moscow exchange office, and ABCEX, a Russia-based exchange with a Georgian legal entity that TRM tracked as a potential Garantex replacement.

UK-regulated firms must immediately block transactions with designated entities, freeze associated funds and report to the Office of Financial Sanctions Implementation. The designation prohibits correspondent banking and payment processing services to the named entities, covering both fiat and crypto flows. OFSI's consolidated sanctions list serves as the official reference point for compliance obligations.

What compliance teams must do now

Firms subject to UK sanctions obligations face three immediate requirements. First, wallet screening and transaction monitoring controls must block transactions to or from any designated entity from the designation date forward. Second, any balances attributable to designated persons must be frozen, covering both crypto and fiat holdings. Third, firms must report frozen assets to OFSI.

Regulators expect look-back exercises to identify pre-designation connectivity to the named entities. TRM's compliance advisory team recommended a structured approach: map the blast radius of connectivity, segment customers by exposure level, apply a consistent review framework tied to sanctions evasion typologies, and document all decisions. The factors to prioritize include transaction size — TRM data shows A7-linked settlements running from $2 million to $40 million per transaction — connections to high-risk jurisdictions, shell company structures and intermediary addresses flagged as conduits.

OFSI's 2024 guidance specifying three to five hops as the threshold for indirect risk in transaction monitoring applies here, though TRM noted that focusing on frequency and pattern is more useful than counting hops alone. A wallet with dozens or hundreds of recurring indirect paths to a sanctioned entity carries materially different risk than one with three or four.

The compliance precedent for crypto exchanges

The HTX designation represents the first time a crypto exchange of this scale has been sanctioned by the UK. It follows a broader enforcement trend: OFSI recently imposed a 1 million pound penalty on Sabre Global Technologies for continuing to service Ural Airlines for seven months after the carrier was designated — the largest UK sanctions fine related to Russia's invasion of Ukraine.

For compliance teams, the designation signals that sanctions screening is no longer limited to checking static customer names. Crypto firms need wallet intelligence, transaction monitoring and escalation processes that can respond when a major platform appears on an official list. The UK enforcement approach explicitly connects HTX and the A7 network to Operation Destabilize, the National Crime Agency-led operation targeting Russian money laundering infrastructure, suggesting more designations targeting crypto infrastructure are likely.

This article is for informational purposes only and does not constitute investment advice.