Insights · Compliance · Beneficial ownership
The company named on a ship's registry is almost never the whole story. Behind it sits a chain of managers, operators and holding companies — and the only reliable way through that chain is a stable identifier for each entity.
Ask "who owns this ship?" and you will rarely get a single answer. A modern vessel is wrapped in a deliberate stack of companies, each with a different role, often spread across several jurisdictions. Most of this is ordinary and legitimate — a way to manage liability, tax and operations. But the same structures that protect a reputable owner can also hide one, which is why resolving ownership is a core part of any serious sanctions screen. Every vessel file on Marifest is built to surface this chain, keyed to the permanent IMO number.
It helps to name the roles, because they are distinct and a ship can have a different company in each:
| Role | What it means |
|---|---|
| Registered owner | The legal entity named on the flag registry — usually a single-ship company. |
| Beneficial owner | The person or parent group that ultimately controls and profits from the vessel. |
| Ship manager | The company running the ship day to day — crewing, maintenance, technical compliance. |
| Operator / commercial manager | The party that commercially employs the ship, fixes cargoes and earns the freight. |
The most striking feature of shipping ownership is the single-ship company: a company that owns exactly one vessel. The reason is liability. If a ship is arrested, has an accident or is hit with a large claim, ring-fencing it in its own company limits the damage to that one asset rather than the owner's whole fleet. So a group running fifty ships may sit behind fifty owning companies, frequently registered in low-tax jurisdictions. This is standard, prudent practice — but it also means the registered owner tells you almost nothing about the size or identity of the real owner behind it.
To resolve a company reliably across borders, you need an identifier that does not depend on a name spelled three different ways in three registries. That is what the Legal Entity Identifier (LEI) provides. Maintained under the Global Legal Entity Identifier Foundation (GLEIF), an LEI is a 20-character alphanumeric code that uniquely identifies a legal entity worldwide, with reference data on its name, address and — where available — its direct and ultimate parent.
For ownership work the value is twofold. First, the LEI is a stable key: two ships managed by the same parent can be tied together even if the owning companies are named differently. Second, GLEIF's parent-relationship data starts to expose the hierarchy above the single-ship company. Marifest links owning and managing companies to their LEIs through the GLEIF register, so the chain above a vessel can be followed rather than guessed.
The registered owner is a door, not a destination. The question that matters for compliance is who stands behind it — and the LEI is the key that fits across jurisdictions. Why ownership is resolved by LEI, not by name
Ownership is not a detail; it is often the whole exposure. Under OFAC's 50 Percent Rule and the equivalent ownership tests in EU and UK sanctions, property in which a blocked person holds a controlling or majority interest is itself blocked — automatically, whether or not it is named. A vessel with a perfectly clean hull but a designated beneficial owner is therefore off-limits. This is precisely the case that name-only screening misses: the ship is not on any list, but the entity that controls it is. Resolving the owner, manager and operator and screening each against the four major regimes is the only way to catch it.
The flip side is evasion. The shadow fleet moving sanctioned oil leans heavily on opaque ownership: freshly incorporated single-ship companies with no track record, owners and managers that change in lockstep with a reflagging, and structures designed to resist exactly the kind of resolution the LEI enables. A sudden change of beneficial owner to an unknown entity, especially alongside a flag change and gaps in AIS, is one of the clearest signals that a vessel has slipped into that trade.
Marifest is built to make the chain legible. Across 97,000+ vessels, each file in the registry resolves the registered owner, manager and operator via GLEIF and runs them through sanctions screening alongside the hull itself — so a clean ship never hides a listed owner.
How Marifest uses it
Marifest does not stop at the registered owner. It resolves the manager, operator and parent through GLEIF and screens each one, so the company that really controls a vessel cannot hide behind a single-ship shell.
Owning and managing companies are matched to their GLEIF Legal Entity Identifiers — a stable key that works across jurisdictions.
Registered owner, manager and operator appear side by side, so the split between legal title and real control is visible.
The resolved companies are run against OFAC, EU, UN and UK lists, catching a clean hull with a designated parent.
Because everything anchors to the permanent IMO number, an owner change stays attached to the hull as a signal.