A UK-regulated bank is reviewing a trade-finance transaction. The corporate borrower is registered offshore. One shareholder holds forty-three percent. A second holds ten percent. Both appear on the UK Consolidated List of Financial Sanctions Targets. The question arrives on a compliance officer's desk at 4 p.m. on a Friday: is this entity blocked?
Under OFSI's ownership and control test (the assessment used to determine whether a non-listed entity is caught because a listed person owns or controls it), a company is treated as subject to the asset-freeze prohibition when listed persons own it in the aggregate — directly or indirectly — at a threshold that OFSI applies by reference to majority ownership or the ability to exercise control. Unlike OFAC's purely mechanical 50 percent rule (which treats any entity owned 50 percent or more in aggregate by blocked persons as itself blocked), OFSI applies a two-limb test: ownership at a majority level, or control — and control is assessed qualitatively as well as numerically. As of July 2026, that distinction decides deals, restricts payments, and determines whether a voluntary disclosure is needed.
This guide walks through the OFSI ownership-and-control test step by step, compares it with the OFAC and EU positions, identifies the risk flags that practitioners most frequently encounter, and explains when to involve specialist counsel.
Step 1: Identify whether a listed person is in the ownership chain at all
Before applying any threshold test, you must establish that at least one designated person — an individual or entity on the UK Consolidated List of Financial Sanctions Targets — holds an interest, directly or through an intermediary, in the entity you are screening. If no listed person is present anywhere in the chain, the ownership-and-control question does not arise. The prohibited conduct under the relevant UK thematic sanctions regulations is dealing with the funds or economic resources of a designated person, or making those funds available to them.
Screening the entity name alone is not enough. In our experience, the ownership structures that create the highest residual risk are those where the listed person sits two or three layers up — in a holding company, a trust, or a nominee arrangement — and the operating entity has no obvious connection to the designation. Firms that run only entity-level checks against the Consolidated List miss exactly this pattern.
The practical starting point is therefore a structured ownership-chain review: obtain beneficial-ownership registers, corporate filing data, and any available shareholder agreements. Map every layer from the counterparty up to its ultimate beneficial owners. Note the percentage held at each level and the identity of each intermediate holder. This is the factual foundation on which the rest of the analysis rests.
Step 2: Apply the ownership limb — what threshold does OFSI use?
OFSI's ownership limb focuses on majority ownership: where a designated person holds, directly or indirectly, more than fifty percent of the shares or voting rights in an entity, that entity is treated as owned by the designated person for the purpose of the asset-freeze prohibition. Aggregation across multiple listed persons applies — if two designated individuals each hold thirty percent, the aggregate is sixty percent and the threshold is crossed.
That aggregation point is where analysis most often goes wrong. A counterparty whose largest individual shareholder is a non-listed person can still be caught if two or more smaller holdings, each individually below fifty percent, are held by designated persons whose stakes add up to a majority. The Consolidated List must therefore be checked against every named shareholder, not just the largest.
Indirect holdings compound the complexity further. Where a designated person owns a majority of an intermediate holding company, which in turn owns a majority of the operating entity, the chain continues: the operating entity is treated as majority-owned by the designated person at the top of the chain. Calder & Vance regularly advises clients who discover a listing several layers removed from the counterparty they are transacting with. The analysis does not stop at the first intermediate level; it follows the chain as far as the ownership interest runs.
One data point worth holding in mind: the fifty-percent ownership threshold in the OFSI framework mirrors the figure used in OFAC practice, but the two regimes apply it differently — more on that divergence in Step 4 below.
Step 3: Apply the control limb — how does OFSI assess control?
Control, under OFSI's approach, is assessed not only by reference to numerical shareholding but by reference to the practical ability to direct or determine the decisions of the entity. This is a qualitatively richer test than the ownership limb and requires a different kind of evidence. A designated person may hold well below fifty percent of the shares and yet exercise control through a shareholders' agreement, a right to appoint the majority of the board, veto rights over key decisions, or contractual arrangements that give them effective authority over the entity's commercial conduct.
The control assessment is therefore document-intensive. Compliance counsel will need to review the constitutional documents of the entity — its articles of association or equivalent — together with any side agreements, shareholder pacts, management agreements, loan agreements with governance rights attached, and board minutes that reveal the pattern of decision-making. In a recent matter, a financial institution we advise identified that a designated individual held only twenty-two percent of a target entity but had the contractual right to appoint three of the five board members. The entity was treated as controlled. The transaction was put on hold while a licensing assessment was prepared.
OFSI's published guidance on ownership and control makes clear that it expects firms to look beyond formal legal structures to the economic and operational reality. That is a materially broader instruction than simply checking share registers. Do your screening procedures capture contractual control rights, or do they stop at the share register?
Step 4: How does the OFSI test differ from OFAC and the EU?
The OFAC 50 percent rule is mechanical: any entity owned fifty percent or more in the aggregate by one or more blocked persons is itself treated as blocked, regardless of whether those persons exercise practical control. OFAC's guidance under IEEPA makes this explicit. There is no separate control limb. The test is ownership, and ownership alone determines the result above the threshold.
OFSI operates the two-limb test described above. Below a majority ownership level, the control question is live and must be answered on the facts. This means that a counterparty below the fifty-percent ownership threshold is not automatically clear under UK sanctions; it may still be caught if control can be established. Conversely, OFAC's bright-line rule produces certainty at the threshold — if aggregate ownership by blocked persons is below fifty percent, OFAC's ownership rule does not apply (though other prohibitions may still be relevant).
The EU position under the relevant Council regulations is closer to the OFSI approach than to OFAC. EU sanctions guidance provides for both an ownership test and a control test, and the control analysis under EU practice similarly looks beyond formal shareholding to economic and contractual reality. Where a transaction crosses the UK, EU, and US regimes simultaneously — as is common in international trade finance, correspondent banking, and cross-border M&A — all three tests must be applied in parallel. The stricter prohibition governs; you cannot rely on a clear result under one regime to discharge your obligations under another.
A practical example of regime divergence: a counterparty owned forty-eight percent by a designated person might be clear under the OFAC fifty-percent ownership rule (assuming no separate blocking order) but caught under OFSI if the designated person has effective control through board appointment rights. We regularly advise on exactly this kind of multi-regime gap analysis before transactions proceed.
For businesses with exposure to the Australian autonomous sanctions regime, a related comparison exercise applies. Australia's framework has its own approach to affiliated-entity analysis. See our guide to name and entity screening under the Australian regime for a treatment of that jurisdiction.
Step 5: What are the risk flags that indicate enhanced analysis is needed?
Certain ownership structures reliably produce higher residual risk and call for enhanced analysis rather than a standard screening pass. Recognising these patterns early is the practical value of a structured approach to the 50 percent rule and ownership analysis under OFSI.
- Nominee shareholders and bearer structures: where the registered shareholder is a nominee, the beneficial ownership behind the nominee must be traced. The nominee's name is irrelevant; the designated person could be the undisclosed principal.
- Trust arrangements: a designated person who is a settlor, protector, or beneficiary of a trust holding shares in the counterparty can create sanctions exposure even without a direct ownership interest. OFSI's approach to trusts is not a bright-line numerical test; it requires an assessment of who ultimately benefits and who exercises control over the trust's assets.
- Aggregation across family members or affiliated entities: where multiple members of a family group or a network of connected entities hold stakes, and one or more of those persons is designated, the aggregate across the group must be assessed rather than each stake in isolation.
- Recently restructured ownership: where a counterparty has undergone a share transfer or restructuring close to or after a designation event, the chronology of the restructuring must be examined. A transfer of shares after designation does not remove the exposure; the dealing prohibition prevents the designated person from disposing of assets.
- Jurisdictions with limited corporate transparency: where the counterparty is registered in a jurisdiction with restricted access to beneficial-ownership information, the data obtained must be assessed critically. A gap in the information is itself a risk flag.
If any of these flags are present, a standard automated screening pass is not sufficient. Enhanced due diligence — structured ownership-chain mapping, document review, and, where necessary, external verification — is required before a transaction proceeds.
The position above covers the standard framework. Your facts — the specific counterparty, the jurisdiction of incorporation, the structure of the interest held, and the regime in play — change the analysis materially.
To discuss an ownership-and-control assessment, contact Calder & Vance at info@caldervance.com.
Step 6: What obligations arise when you identify a potential breach?
If the ownership-and-control analysis identifies that a counterparty is owned or controlled by a designated person, a number of obligations arise in parallel. Understanding the sequencing matters. Acting out of order can foreclose options that remain available if the issue is handled promptly and in the right sequence.
First, the immediate obligation: where you hold funds or economic resources that belong to or are owned, held, or controlled by a designated person, those assets must be frozen. Dealing with them, or making them available to the designated person or for their benefit, is a criminal offence under the relevant UK thematic sanctions regulations. The prohibition is strict-liability in its structure: it does not require proof of intent for a civil monetary penalty to be imposed, though intent is relevant to criminal prosecution.
Second, OFSI imposes a reporting obligation. Where a person knows or has reasonable cause to suspect that a designated person holds or has held an interest in funds or economic resources they hold, they must report that to OFSI without delay. The reporting window is a short statutory period. Failure to report is itself a separate offence. In our experience, firms that identify a potential ownership issue sometimes focus entirely on the dealing prohibition and miss the independent obligation to report.
Third, if a transaction has not yet completed, you must consider whether it can proceed at all — and if not, whether a specific licence (a case-by-case authorisation from OFSI to conduct an otherwise prohibited transaction) is available. OFSI's licensing grounds include, among others, provisions for prior obligations, extraordinary situations, and humanitarian purposes. The applicable licensing ground will depend on the facts. Not every prohibited transaction has a licensing route; that assessment must be made before any steps are taken to complete the transaction.
Fourth, consider whether a voluntary self-disclosure — known as a VSD (a proactive report to OFSI of a potential breach before enforcement action is commenced) — is appropriate. OFSI's enforcement guidance treats a well-structured VSD as a mitigating factor in penalty proceedings. The timing and quality of the VSD matter; a disclosure that is delayed, incomplete, or poorly evidenced will carry less mitigation weight than one that is prompt and comprehensive.
If a transaction has already been flagged, or a potential breach has been identified, an early review preserves options that narrow with time. Contact Calder & Vance at info@caldervance.com for a confidential initial assessment.
Step 7: Embedding ownership analysis in your ongoing compliance programme
The ownership-and-control question is not a one-time exercise at transaction inception. It is a recurring obligation. Designations occur without advance notice. A counterparty that was clean at onboarding can become subject to a designation the following week, month, or year. A robust ongoing monitoring programme must therefore include periodic rescreening of existing counterparties, not only new entrants.
The five elements that OFSI and equivalent regulators look for in a well-constructed sanctions compliance programme are broadly: senior management commitment, risk assessment, internal controls, testing and audit, and training. The ownership-and-control analysis sits within the internal controls element — specifically the due-diligence and transaction-monitoring controls. Firms that have designed their screening architecture around name-match logic alone, without an ownership-and-control overlay, are carrying risk that the screening tool does not surface.
Periodic testing of the screening and ownership-mapping logic is a practical check. Does the system aggregate across multiple listed persons holding stakes in the same entity? Does it follow indirect holdings through intermediate layers? Does it flag trust arrangements and nominee structures as requiring enhanced review? These are the questions a compliance audit should ask.
For businesses operating across multiple jurisdictions, the compliance architecture must accommodate the differing tests across OFSI, OFAC, and the EU regime simultaneously. A control structure designed to satisfy one regime may not discharge the obligations under another. We advise clients to build their ownership-analysis procedures against the stricter of the applicable tests, then verify that the result is also consistent with the other regimes in scope.
For an assessment of your sanctions compliance programme's treatment of ownership and control — including screening logic, ownership-chain procedures, and cross-regime alignment — see our compliance audit and testing service. A structured review will identify gaps before a regulator does.
A common myth: clearing the ownership test under one regime clears the others
A persistent misunderstanding in compliance practice is this: if our screening confirms the counterparty is below the fifty-percent ownership threshold, we are clear. That position conflates OFAC's mechanical rule with the broader obligations under OFSI and the EU. It is not correct, and it can produce serious consequences.
The OFSI control limb is independent of the ownership threshold. A counterparty at forty-eight-percent ownership by a designated person may pass the ownership limb and yet be caught by the control limb if that person has effective governance rights. A compliance programme that stops at the ownership percentage and does not proceed to the control assessment is structurally incomplete.
The same is true in reverse. A clear result under OFSI — no ownership, no control — does not discharge US obligations if the counterparty has a separate nexus to a blocked person under OFAC's rules, or if a broader OFAC nexus (including secondary-sanctions considerations) applies to the transaction. The regimes run in parallel. Counsel who understand the interaction between them add material value at the point of transaction review.
In our cross-border practice, the transactions that produce enforcement exposure are rarely those where the answer is obvious in one direction. They are the ones where the result is borderline under one test and clearly caught under another — and the compliance team assumed that clearing one test meant clearing both.
Related practices
- Compliance audit and testing – structured review of screening and ownership-analysis controls against multi-regime requirements.
- 50 percent rule ownership analysis – extended guide – deeper treatment of indirect holdings, trust structures, and cross-regime gap analysis.