21Shares files for spot Sei ETF

The proposed trust would use Coinbase for custody, CF Benchmarks pricing and may incorporate staking if tax status allows

by Blockworks /
article-image

CryptoFX/Shutterstock modified by Blockworks

share

21Shares today filed a form S-1 with the Securities and Exchange Commission, seeking to register the 21Shares Sei ETF, a trust offering direct exposure to SEI, the Sei Network’s native token.

The filing names Coinbase Custody Trust Company as the ETF’s custodian, with Coinbase, Inc. acting as prime broker. Net asset value would be calculated using the CF SEI-Dollar Reference Rate — New York Variant, published by CF Benchmarks, which aggregates prices across multiple spot venues to ensure transparency and reduce reliance on any single market feed.

The filing also allows for discretionary staking of SEI if regulators and tax authorities determine it would not compromise compliance.

21Shares is a crypto-native ETP provider that pioneered the world’s first physically-backed crypto exchange-traded product (ETP) — dubbed “HODL” — on the SIX Swiss Exchange. 

By the end of 2024, it was one of the largest global issuers of crypto ETPs with 44 listed products in numerous currencies. The company raised funding in 2022 at a valuation of around $2 billion and is now part of the 21.co Group.

If approved, the Sei ETF would join bitcoin and ether ETFs already trading, alongside pending SEC applications for Solana and XRP.

This is a developing story.


This article was generated with the assistance of AI and reviewed by editor Jeffrey Albus before publication.


Get the news in your inbox. Explore Blockworks newsletters:

Tags

Decoding crypto and the markets. Daily, with Byron Gilliam.

Upcoming Events

Hilton Park Lane

Tues - Wed, November 10 - 11, 2026

DAS London is a two-day summit at the Hilton Park Lane in London featuring conversations between the builders, allocators, and policy makers who are shaping the trajectory of the digital asset ecosystem in the UK, Europe, and North America.

Marina Bay Sands Singapore

Wednesday, October 07, 2026

DAS Asia is a a single-day summit at Marina Bay Sands Singapore featuring conversations between the builders, investors, and global leaders are shaping the trajectory of the digital asset ecosystem in Asia & North America.

recent research

SOL VAL ACCR White.jpg

Research

SOL value accrual has become a central tokenholder concern. This report examines how Solana can strengthen SOL economics through higher burn, lower issuance, and in-protocol fee sharing, with a focus on Temporal’s SIMD 547, Helius’ SIMD 550, and SIMD 123. Using a 10,000-slot sample, we estimate how much activity-linked burn SIMD 547 could generate under current usage and future scaling scenarios.

Newsletter

The Breakdown

Decoding crypto and the markets. Daily, with Byron Gilliam.

Blockworks Research

Unlock crypto's most powerful research platform.

Our research packs a punch and gives you actionable takeaways for each topic.

SubscribeGet in touch

Blockworks Inc.

133 W 19th St., New York, NY 10011

Blockworks Network

NewsPodcastsNewslettersEventsRoundtablesAnalytics