A financial institution processing a payment on behalf of a UK-incorporated holding company runs a routine screening check. The counterparty itself does not appear on any list. But a beneficial owner – one of several – has been designated under the relevant UK financial sanctions regulations. The question arrives at the compliance desk: is this payment prohibited? The answer turns entirely on whether that designated person's stake, combined with any other listed holders, reaches the statutory threshold. Get it wrong in either direction – blocking a clean transaction or allowing a prohibited one – and the cost is significant.
Under the UK sanctions regime administered by OFSI (the Office of Financial Sanctions Implementation), a non-listed entity is treated as subject to the same asset-freeze prohibition as a designated person when one or more designated persons own or control it. The ownership limb mirrors the broad approach taken across major regimes: stakes of 50 percent or more in aggregate, held directly or through intermediate entities, are the primary trigger. However, OFSI's test does not stop at ownership alone – control is an independent and often more demanding ground, and it is this control element that most frequently generates genuinely contested questions in cross-border matters.
This page sets out how the OFSI ownership and control analysis works in practice, where it diverges from the OFAC and EU approaches, what the common risk flags are, and when a business should bring in specialist counsel. The 50 percent rule and ownership analysis under OFSI demands legal support precisely because the rules are layered and the consequences of error are serious.
What is the legal basis for the OFSI ownership and control test?
The OFSI ownership and control test derives from SAMLA – the Sanctions and Anti-Money Laundering Act 2018 – and the thematic regulations made under it, which implement asset-freeze prohibitions in relation to the designated persons named in each regime. Those regulations define "owned or controlled" as the operative standard, and OFSI has published guidance elaborating how it interprets each element in practice.
The ownership limb is met where a designated person, individually or together with other designated persons, holds 50 percent or more of the shares or voting rights in an entity, directly or through a chain of intermediate vehicles. The calculation is aggregated across all designated holders, not assessed person by person. Two designated persons each holding 28 percent would together reach the threshold; a screening tool that checks only whether any single person crosses 50 percent would miss that entirely. In our experience, this aggregation blind spot is one of the most common sources of undetected exposure in otherwise well-run compliance programmes.
The control limb extends the prohibition to situations where a designated person – even one holding no equity at all – has the right to ensure the entity acts in accordance with their wishes. Board composition rights, veto powers under shareholders' agreements, contractual dominance in economic terms, and de facto influence over operating decisions can all potentially satisfy this test. Unlike the ownership limb, there is no bright numerical line. The analysis is necessarily fact-specific, turning on the actual governance and contractual arrangements of the entity in question.
How does the OFSI test differ from OFAC and the EU?
The critical divergence between OFSI and OFAC is that OFAC's 50 percent rule (a policy applying its ownership-aggregation guidance under IEEPA) is primarily mechanical, focusing on equity ownership and not incorporating a freestanding control test. OFSI's test explicitly includes control as a parallel ground, meaning an entity can be caught even where no designated person holds any meaningful equity stake. For a business with exposure to both US and UK sanctions – which describes virtually every institution operating in international trade and finance – a transaction that passes the OFAC ownership analysis can still be blocked under OFSI rules.
The EU position, set out in the relevant Council regulations, takes a broadly similar dual approach to OFSI: entities owned or controlled by designated persons are subject to the same prohibitions as the designated persons themselves. There are, however, differences in how the ownership and control concepts are elaborated in EU guidance compared with OFSI's published materials, and in how the EU General Court has approached challenges to designations that hinge on the control characterisation. Practitioners advising on cross-border matters therefore cannot simply export the OFSI analysis to the EU file and assume equivalence.
The cross-border tension is sharpest in three common scenarios. First, where an entity has multiple shareholders across different jurisdictions and the designation lists in each regime do not perfectly overlap. Second, where a private-equity or corporate structure involves complex intermediate holding layers, some in jurisdictions with distinct national sanction rules. Third, where a minority shareholder exercises contractual control through side agreements that a simple equity-ownership check would not surface. Does your screening process go beyond the cap table to the governance documents?
The position above covers the standard case. Your facts – the counterparty, the structure, the governing regime, and the jurisdictions involved – change the analysis materially. For an early assessment of your exposure under OFSI and related regimes, contact Calder & Vance at info@caldervance.com.
What does the ownership analysis require in practice?
A complete OFSI ownership analysis requires four sequential steps, each building on the last. Shortcuts at any stage create a gap that, in an enforcement context, can be very difficult to defend.
The first step is identifying all designated persons with any direct holding in the target entity. This requires running every named shareholder against the UK Consolidated List and any other lists relevant to the transaction – remembering that UK and EU lists, while substantially overlapping post-Brexit, are maintained separately and can diverge, particularly after fresh designation cycles. Running only the UK list without checking for EU persons on the register of an EU-incorporated entity is a recurring gap.
The second step is aggregation. Once all designated shareholders are identified, their stakes must be aggregated to test whether the combined holding meets or exceeds 50 percent. The aggregation runs across the register as it stands on the relevant date; historic changes to ownership structure are not directly relevant unless the transaction in question relates to an earlier period.
The third step is tracing through intermediate vehicles. Where shares are held through a chain of holding companies, the analysis must trace upwards through each layer to the ultimate beneficial owners. OFSI's guidance makes clear that indirect ownership is as potent as direct ownership for these purposes. A designated person who holds 60 percent of a parent company which in turn holds 80 percent of the operating subsidiary is an indirect 48 percent owner of the subsidiary – a fraction below the threshold, but if a second designated person holds even a small direct stake in the subsidiary, the threshold is crossed.
The fourth step is the control assessment. Even where the ownership limb is not satisfied, the control analysis must be completed. This requires reviewing constitutional documents, shareholders' agreements, board-appointment rights, any management service or operating agreements, and any relevant debt instruments that could confer governance rights. Convertible instruments and pledge arrangements require particular attention: rights that crystallise on an event of default or election can change the control analysis from one day to the next.
What are the highest-risk structures and scenarios?
Certain structures present elevated risk, either because the ownership analysis is harder to complete reliably or because the control test is more likely to be engaged. Understanding these patterns is the first line of defence.
Layered holding structures are the most common source of missed exposure. When an operating company sits several layers below ultimate beneficial owners, each intermediate vehicle must be examined. A designated person who owns 100 percent of a BVI special purpose vehicle which in turn owns 55 percent of a Cayman fund which holds a 70 percent stake in the operating company is, in terms of indirect influence, a controlling presence – and both the ownership and control limbs may be engaged simultaneously. In our cross-border practice, we regularly encounter structures where the first two layers of ownership are clean but a designated interest emerges at the third or fourth level.
Joint ventures present a distinct variant. Where a joint venture is 49 percent owned by a designated person, the equity ownership test is not met. But if the designated partner has board veto rights, rights of first refusal on the exit of other partners, or approval rights over operating budgets and key contracts, the control analysis is live. The documentation of the joint venture arrangement – including any side letters – is essential to the assessment.
Post-designation changes of control create another class of risk. Where a shareholder is designated after a transaction closes, the business must re-run the ownership and control analysis as at the designation date. If the designated person held a qualifying stake or control position at that point, the entity's assets may already be frozen and any subsequent payment or transfer in relation to those assets potentially constitutes a dealing. Timing the designation event against the transaction history is therefore a mandatory element of any post-designation review.
Trusts are a further complexity. OFSI's published guidance addresses trust structures, recognising that a designated person who is a beneficiary, trustee, or settlor may, depending on the nature of the trust arrangements, be regarded as having ownership or control of the trust assets. Each trust requires individual analysis; there is no single rule that resolves all trust structures uniformly.
If a transaction has already been flagged, or a payment has already been processed following a designation event, an early review can preserve options that narrow with time. Contact our team at info@caldervance.com for a confidential review.
Common misconceptions about the OFSI ownership and control test
One widespread assumption is that the OFSI analysis mirrors the OFAC 50 percent rule so closely that a single combined assessment covers both. It does not. OFSI's control ground is broader than anything OFAC currently applies in its ownership guidance, and the evidentiary standard for satisfying it – or rebutting it – involves legal analysis of governance rights rather than a mathematical ownership calculation. Treating the two tests as interchangeable creates real risk in cross-border structures where some entities fall under UK financial sanctions jurisdiction but not under US jurisdiction, or vice versa.
A second misconception is that screening software provides a complete answer. Automated screening is necessary but insufficient. It can identify designated persons by name against shareholder registers – where registers are available and current. It cannot perform the aggregation analysis across multiple designated shareholders, it cannot assess indirect holdings through intermediate vehicles unless specifically configured to do so, and it cannot evaluate governance documents for the control test. The compliance function that treats a clean screening result as a final answer rather than as a starting point is systematically underestimating its exposure.
A third misconception is that OFSI's guidance on ownership and control is static. OFSI publishes and updates its guidance on a periodic basis, and the legal environment changes both through new designations and through regulatory clarifications. What satisfied the ownership and control analysis eighteen months ago may require a more detailed review today. Practitioners advising multinationals and financial institutions consistently note the importance of re-testing prior conclusions when designation lists are updated significantly or when OFSI publishes revised guidance materials.
How Calder & Vance approaches OFSI ownership analysis
We provide structured ownership and control assessments that follow the four-step process described above, and we integrate the cross-regime analysis from the outset where a matter has US, EU, or other jurisdictional dimensions. Our work on OFSI ownership questions is not limited to the binary conclusion of whether an entity is caught; we advise on how the analysis should be documented, what steps a business can take to manage identified exposure, and – where an entity is determined to be subject to the prohibitions – what the licensing route under OFSI looks like and whether a specific licence application is appropriate.
We regularly advise financial institutions, payment firms, and corporates that need to move from a screening hit to a legally defensible conclusion. The work product is a written memorandum setting out the ownership chain, the aggregation calculation, the control analysis, the conclusion, and the supporting rationale. That document is the compliance record that the business holds if OFSI or an internal audit function later questions the decision.
In a recent matter, a payment firm received a sanctions hit on a corporate customer whose ultimate beneficial owner appeared on the UK Consolidated List. The firm's internal screening had flagged the direct beneficial owner but had not performed the aggregation check for a second designated person with a smaller stake. We conducted a full ownership analysis, determined that the combined holding crossed the threshold, advised the firm on its reporting obligations to OFSI, and assisted with the preparation of that report. The matter concluded without an enforcement referral. No guarantee of outcome can be given in similar situations, but early, properly documented action consistently produces better regulatory outcomes than delayed or incomplete responses.
For a complex cross-border structure, the work also extends to the parallel EU and UN analyses. The entity that is caught under OFSI may or may not be caught under EU law, depending on which persons are designated in which regime. The Singapore, UAE, or Australian position may also be relevant depending on where the operating company trades or where its banking relationships sit. We are able to conduct or co-ordinate these parallel analyses through a single instruction, providing a single cross-regime conclusion rather than a series of conflicting national-law opinions.
Related practices
- Compliance audit and testing – Australian sanctions regime – sanctions programme testing and ownership analysis under the Australian autonomous regime
- 50 percent rule and ownership analysis – Singapore – counterparty ownership and control assessment under the Singapore sanctions regime
- 50 percent rule and ownership analysis – UN regime – ownership and control assessment under the UN Security Council Consolidated List