Omnibus vs segregated wallets: how custody wallet structures differ

Key takeaways

Omnibus wallets: one address, many clients

In an omnibus structure, the custodian holds client assets together in one address, or a small set of addresses, and keeps an internal ledger that says how much belongs to each client. A client's transfer in or out is a change in that ledger first; the blockchain moves only when the pool itself needs to be topped up or drawn down.

The attraction is operational. Fewer addresses mean less to manage, and movements between clients of the same custodian can be settled in the books without a network transaction. The cost is evidence: anyone looking at the chain sees one balance, and your entitlement exists only as an entry in the custodian's records. The accuracy of those records, and the controls that reconcile them with the chain, become the point of reliance.

Pooling also raises a legal question. If the pooled balance is ever less than the sum of the ledger entries, the shortfall has to be shared out under the contract and the applicable law. That is the scenario to read the documents for, which is why the guide to bankruptcy-remoteness for custodied assets treats the legal wording as a separate test.

Segregated wallets: one client, one wallet

In a segregated structure, each client's assets sit in a wallet that holds that client's assets only. Because the address is dedicated, its balance can be read on the blockchain and compared with the custodian's statement. This is the strongest form of the three levels described in segregation of client assets, explained, which also covers the weaker, books-only level.

Dubai sets this as a regulatory baseline. The VARA Custody Services Rulebook, as read for the due-diligence guide, says assets in custody are not depository liabilities or assets of the licensed firm, requires separate wallets for each client and bans rehypothecation, which is the custodian lending or pledging client assets for its own purposes. The text should be checked in its current version before you rely on it.

Segregation costs more to run. More addresses mean more keys to protect, back up and monitor, and more network fees when assets are consolidated or moved. How the keys behind each wallet are protected is a separate question, covered in MPC vs HSM vs multisig custody compared.

Omnibus vs segregated: side by side

Prepared for this guide. Last reviewed 22 October 2026.

What neither structure guarantees

A segregated wallet is evidence of separation, not a legal outcome. Who holds legal title, whether the custodian may re-use assets, and which law governs an insolvency are set by documents and jurisdiction, not by the address format. A wallet that holds one client's assets but sits under a custodian's own title can leave more questions than the label suggests.

Regulators say as much. In Singapore, the Monetary Authority of Singapore (MAS) sets out the consumer protection measures it expects of digital payment token providers in guidelines PS-G03, and the risk warning it requires, as printed on Hex Trust's Singapore page, says a trust or segregated account “may not fully protect” a customer's money or tokens if the provider's business fails. This is not legal advice; seek your own advice on the contracting entity.

Licensing is the first check. A licence belongs to a named company and covers named activities, as explained in crypto custody regulation in Dubai, Singapore and Hong Kong. For Hex Trust, Hex Trust MENA FZE is licensed by VARA for Custody Services under VASP Licence VL/23/08/002, issued on 15 November 2023, and the licence applies to that company only.

What to ask a custodian about wallet structure

Turn the structure into documents you can read. These five requests work for any custodian, and they sit within the wider crypto custody due diligence checklist.

1. Which structure applies to my account? Ask in writing whether your assets sit in a wallet that holds your assets only, or in a pooled wallet.
2. Can I see it on-chain? Ask for sample addresses you can check, and how often the books are reconciled with the chain.
3. Who holds legal title? Ask for the custody terms or trust deed.
4. May assets be re-used? Ask for the clause on lending, pledging or rehypothecation, and for it to be stated plainly.
5. What happens if the custodian fails? Ask for a legal opinion on insolvency treatment for the contracting entity.

Custody cost differs by structure and by the service you need, but Hex Trust publishes no fee schedule; see how Hex Trust pricing works. For the wider choice between a custodian and holding keys yourself, read custody vs self-custody for institutions, and for a first definition, what is a digital asset custodian?

FAQ

Sources

Regulator registers and rulebooks relied on for this guide. Pages were last opened on the dates in the due-diligence guide; this article does not re-quote them beyond the points stated.

1. Virtual Assets Regulatory Authority, Custody Services Rulebook, version effective from 19 June 2025, opened 12 October 2026.
2. Monetary Authority of Singapore, Guidelines on Consumer Protection Measures by DPT Service Providers [PS-G03], revised on 19 September 2024, opened 12 October 2026.
3. Virtual Assets Regulatory Authority, public register: Hex Trust MENA FZE, opened 12 October 2026.
4. Monetary Authority of Singapore, Financial Institutions Directory: Hex Technologies Pte. Ltd., opened 12 October 2026.

Statements about Hex Trust come from its live website custody page, read on 6 October 2026, and from the registers listed here. The Hex Trust entities are described on the About page.