Key Takeaways
- • OFAC issued formal guidance on March 31, 2026, confirming that the 50% ownership threshold is a floor, not a ceiling, for sanctions compliance obligations—requiring institutions to evaluate control, actual dealings, and proxy involvement beyond mechanical ownership tests.
- • Recent enforcement actions signal OFAC's intent to pursue sanctions violations based on substance-over-form analysis, moving away from rigid quantitative ownership metrics toward qualitative assessment of corporate control and beneficial ownership structures.
- • Compliance teams must now extend due diligence protocols to examine degree of control, patterns of actual business dealings, and involvement of intermediaries or proxies—factors that may trigger sanctions liability even when formal ownership falls below 50%.
- • The guidance formalizes what enforcement patterns had already demonstrated: reliance on the 50% rule as a safe harbor is no longer sufficient protection against OFAC violations, requiring institutions to implement more granular beneficial ownership assessment frameworks.
Summary
The U.S. Treasury Department's Office of Foreign Assets Control formalized a significant shift in sanctions compliance expectations on March 31, 2026, with guidance addressing sham transactions and sanctions evasion. According to attorneys at Jenner & Block, the guidance confirms what a series of recent enforcement actions had already signaled: the agency's long-standing 50% ownership rule remains in place but functions as a floor rather than a ceiling for corporate due diligence obligations.
The 50% rule has traditionally served as a bright-line test in sanctions compliance, allowing institutions to determine whether an entity triggers regulatory obligations based on a straightforward ownership percentage calculation. However, OFAC's new posture emphasizes that this mechanical threshold cannot serve as the sole basis for compliance decisions. The agency's enforcement approach now incorporates multiple qualitative factors that supervisory authorities expect institutions to evaluate comprehensively.
Institutions must now assess degree of control exercised by sanctioned parties or their designees, examining not merely formal voting rights but operational decision-making authority and strategic influence. Due diligence must also document actual patterns of business dealings rather than relying on organizational charts alone, and compliance teams must identify involvement of proxies, intermediaries, or structuring arrangements designed to circumvent sanctions programs. This shift reflects OFAC's prioritization of substantive economic reality over technical ownership structures.
For hedge funds, family offices, and institutional investors conducting cross-border transactions or managing portfolios with exposure to entities in sanctions-adjacent jurisdictions, the guidance carries direct operational implications. Existing compliance frameworks built around the 50% threshold require expansion to capture beneficial ownership assessments, control verification, and transaction pattern analysis. The timing of this formalization—following enforcement actions that enforced these principles—suggests OFAC will continue to pursue violations identified through these broader analytical lenses rather than accepting ownership-based safe harbors.
The 50% rule has traditionally served as a bright-line test in sanctions compliance, allowing institutions to determine whether an entity triggers regulatory obligations based on a straightforward ownership percentage calculation. However, OFAC's new posture emphasizes that this mechanical threshold cannot serve as the sole basis for compliance decisions. The agency's enforcement approach now incorporates multiple qualitative factors that supervisory authorities expect institutions to evaluate comprehensively.
Institutions must now assess degree of control exercised by sanctioned parties or their designees, examining not merely formal voting rights but operational decision-making authority and strategic influence. Due diligence must also document actual patterns of business dealings rather than relying on organizational charts alone, and compliance teams must identify involvement of proxies, intermediaries, or structuring arrangements designed to circumvent sanctions programs. This shift reflects OFAC's prioritization of substantive economic reality over technical ownership structures.
For hedge funds, family offices, and institutional investors conducting cross-border transactions or managing portfolios with exposure to entities in sanctions-adjacent jurisdictions, the guidance carries direct operational implications. Existing compliance frameworks built around the 50% threshold require expansion to capture beneficial ownership assessments, control verification, and transaction pattern analysis. The timing of this formalization—following enforcement actions that enforced these principles—suggests OFAC will continue to pursue violations identified through these broader analytical lenses rather than accepting ownership-based safe harbors.
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