OFAC 50 Percent Rule: Complete Guide to Ownership & Sanctions

A company screens a new supplier and gets a clean result. No name match on any sanctions list.

The supplier is still blocked. Two shareholders, each individually sanctioned, together own 60% of the company. Neither one owns a majority on their own, and neither triggers a name match, but their combined stake is enough.

This is the OFAC 50 Percent Rule at work, and it's one of the most misunderstood parts of U.S. sanctions law.

What Is the OFAC 50 Percent Rule?

The 50 Percent Rule states that any entity owned 50% or more, in the aggregate, directly or indirectly, by one or more blocked persons is itself considered a blocked person.

This is true even if the entity's own name never appears on OFAC's Specially Designated Nationals and Blocked Persons List (SDN List) or any other sanctions list.

The rule comes from OFAC's own guidance, not a name-matching exercise. It exists specifically to prevent sanctioned individuals from continuing to access the U.S. financial system simply by operating through an unlisted company.

Where the Rule Comes From

OFAC first issued guidance on this concept on February 14, 2008. That original version was narrower: it did not aggregate ownership stakes across multiple blocked persons.

OFAC revised the guidance on August 13, 2014, in a document titled "Revised Guidance on Entities Owned by Persons Whose Property and Interests in Property Are Blocked." This is the current version of the rule still in effect today.

The 2014 revision closed a significant gap. Under the earlier approach, a company was not automatically blocked unless a single blocked person owned 50% or more on their own.

The revised guidance changed that. Ownership stakes held by multiple blocked persons are now added together to determine whether the 50% threshold is met.

How Aggregation Actually Works

OFAC's own FAQ 399 illustrates the rule with a direct example. If Blocked Person X owns 25% of Entity A, and Blocked Person Y separately owns another 25% of Entity A, Entity A is blocked.

Neither person individually crosses 50%. Combined, their ownership does, and that's all the rule requires.

This aggregation applies even across different sanctions programs. OFAC has confirmed that ownership interests of persons blocked under different executive orders or regulations are still added together for this calculation.

The practical implication is significant. A single ownership review is not enough. Every blocked owner's stake needs to be identified and combined before concluding an entity is clear.

Indirect Ownership Counts Too

The rule doesn't stop at direct shareholders. OFAC has clarified that "indirectly" includes ownership held through intermediate entities.

If a blocked person owns 60% of Company A, and Company A owns 60% of Company B, Company B is also blocked. The blocked person's indirect stake in Company B, calculated through Company A, still meets the threshold.

This means ownership analysis can require tracing through several layers of corporate structure before a genuine answer emerges. A clean answer at the first layer does not guarantee a clean answer overall.

For global companies with complex holding structures, this is often the hardest part of sanctions compliance to operationalize properly. A joint venture, a private equity-owned portfolio company, or a multinational with layered regional subsidiaries can each require several rounds of tracing before ownership becomes fully transparent.

What the Rule Does Not Cover

The 50 Percent Rule is specifically about ownership. It does not, on its own, block an entity that a sanctioned person merely controls without owning 50% or more.

OFAC's FAQ 398 confirms this directly. An entity controlled, but not majority-owned, by a blocked person is not automatically blocked under the 50 Percent Rule.

That doesn't mean such an entity is risk-free. OFAC has stated it may separately designate a controlled entity if it determines the entity is controlled by a blocked person, adding it to the SDN List through a distinct enforcement action.

OFAC's FAQ 400 adds a related nuance. If a blocked individual holds a minority stake, such as 30%, in a company, the company itself is not automatically blocked. But U.S. persons still cannot do business with that blocked individual directly, including through a contract the individual signs on the company's behalf.

Why the Rule Matters for Compliance Programs

Name-based sanctions screening cannot detect 50 Percent Rule exposure on its own. A blocked entity created through aggregated or indirect ownership will pass every name check cleanly.

This is why OFAC's guidance and industry practice both treat ownership analysis as a required complement to name screening, not an optional enhancement.

The consequences of missing this exposure are the same as any other sanctions violation. OFAC's sanctions programs generally operate under strict liability, meaning a violation can occur regardless of whether the company knew about the underlying ownership structure.

Blocked property involving a 50 Percent Rule entity generally must be reported to OFAC, consistent with OFAC's standard reporting timelines for blocked property.

Some sanctions programs operate outside the 50 Percent Rule framework entirely. OFAC has noted that certain programs, including those covering Cuba, Iran, North Korea, Syria, Venezuela, and the Crimea region of Ukraine, can block persons based on separate criteria, such as the definition of a blocked government, independent of the ownership calculation described here.

Practical Steps for Managing 50 Percent Rule Risk

Screen beneficial owners, not just the counterparty name. Identify every individual or entity with a meaningful ownership stake, not just the party signing the contract.

Aggregate stakes across all blocked owners. A single 20% blocked shareholder might look immaterial. Combined with two other blocked shareholders at 15% each, the aggregate crosses the threshold.

Trace ownership through intermediate entities. Indirect ownership through holding companies or subsidiaries counts toward the 50% calculation and needs to be mapped, not assumed away.

Reassess when ownership changes. A company that was clean at onboarding can cross the 50% threshold later if a blocked person acquires additional shares, or if another shareholder becomes newly designated.

Exercise caution even below the threshold. OFAC has explicitly urged caution when dealing with entities where a blocked person holds a significant, but sub-50%, ownership interest or exercises control through other means.

Where Technology Helps

Manually tracing ownership across multiple entities and jurisdictions is slow and error-prone, particularly for global counterparties with layered corporate structures.

Trademo's Sanctions Control & Ownership Screening maps direct and indirect ownership relationships to help identify exposure under rules like the OFAC 50 Percent Rule, working alongside standard Sanctions & PEP Screening rather than replacing it. UBO Screening complements this by identifying the individuals who ultimately own or control a counterparty across multi-layer structures.

None of this removes the underlying judgment required. Ownership data still needs qualified review, particularly in the gray areas OFAC's own guidance acknowledges around control and minority ownership.

The Bottom Line

The 50 Percent Rule extends OFAC's reach well beyond the names that actually appear on a sanctions list. Aggregated and indirect ownership can quietly create a blocked entity that no name-based check will ever catch.

Compliance programs that treat ownership analysis as a core, ongoing part of sanctions screening, rather than a one-time onboarding exercise, are the ones equipped to catch this exposure before it becomes a violation.