Nexo will likely disclose names and balances, not on‑chain addresses

I think you’re right: Nexo, as a custodial platform, usually won’t publish users' on‑chain crypto addresses. They keep customer funds on pooled or internal ledgers, so public disclosures tend to reference a person’s identity and account balances rather than specific blockchain addresses.

Legally they can provide names and balances to regulators or in response to subpoenas, but that’s different from publishing mapped on‑chain addresses. If you need certainty about what they share, check Nexo’s privacy policy or ask their support, and consider self‑custody if address-level privacy is important to you.