A Winklevoss-affiliated firm has applied to the U.S. Securities and Exchange Commission to launch a spot exchange-traded fund tracking Zcash, proposing a 0.25% expense ratio under the ticker symbol WINK.

The filing would represent one of the first U.S. ETF proposals built around a privacy-oriented cryptocurrency. Privacy coins have historically drawn closer regulatory examination over compliance and traceability concerns.

What does the proposed fund track?

The fund would hold Zcash (ZEC) and price its shares against a market benchmark, according to the application. The 0.25% annual fee places the product within the expense-ratio range of spot bitcoin and ether ETFs that have cleared SEC review since January 2024.

The WINK ticker would join a growing roster of crypto-asset ETF symbols trading on U.S. exchanges. The proposed product would follow the operational template common to spot crypto ETFs: a trust holds the underlying asset while authorized participants issue and redeem shares.

Who is behind the filing?

Cameron and Tyler Winklevoss gained early prominence as bitcoin advocates and operators of the Gemini exchange. They pursued one of the earliest U.S. applications for a spot bitcoin ETF years before such products won approval. That application was rejected, but the brothers have continued to participate in the U.S. crypto ETF landscape through affiliated vehicles.

The Zcash filing applies a similar wrapper structure to a different underlying asset. Gemini operates a regulated U.S. trading platform with experience in custody and surveillance arrangements relevant to ETF sponsors.

How does Zcash fit the altcoin ETF pipeline?

Since the SEC cleared spot bitcoin products in January 2024 and spot ether products several months later, asset managers have queued additional altcoin filings. The current pipeline includes applications tied to solana, XRP, litecoin, and dogecoin. None has yet secured the Commission's green light.

A Zcash product would extend that line into a narrower market segment. Privacy-focused cryptocurrencies have typically required additional compliance controls at exchanges and custodians, including enhanced transaction monitoring.

What makes Zcash distinct?

Zcash launched in 2016 as a fork of the bitcoin codebase. The protocol uses zero-knowledge proofs — specifically zk-SNARKs — to let users shield transaction data including sender, receiver, and amount. Unlike fully anonymous cryptocurrencies, Zcash supports transparent addresses by default. Shielded transactions remain opt-in.

That hybrid design has shaped the project's regulatory positioning. Authorities in multiple jurisdictions have pressed operators of privacy-oriented assets to implement transaction monitoring and travel-rule compliance. A U.S. ETF wrapper would need to address those expectations through its custodian and authorized-partner structure.

What are the operational implications?

A privacy-coin ETF would require the trust to source and custody Zcash through regulated counterparties. Authorized participants would acquire ZEC on compliant venues and deliver it to the trust in exchange for share creation units.

The redemption process would have to address Zcash's optional-shielding feature. Standard ETF operations assume transparent on-chain holdings, since authorized participants and custodians require auditable transfer records. The trust would most likely hold only transparent ZEC, leaving shielded transactions outside the wrapper.

What happens next?

Under the SEC's review framework for novel ETF applications, the filing will enter a public comment window. The Commission is likely to apply heightened scrutiny given the privacy-coin profile, extending any approval or denial timeline.

If cleared, the WINK fund would list on a national securities exchange subject to that venue's listing standards for commodity-based trusts. Until then, the application joins a queue of altcoin ETF proposals awaiting regulatory resolution, with the next procedural milestones tied to SEC comment periods and exchange listing-rule filings.