Cboe Makes Third Attempt to List ARK 21Shares Bitcoin ETF

The proposed ETF, a collaboration between Cathie Wood’s Ark Invest and crypto investment product firm 21Shares, aims to list and trade on the Cboe BZX exchange

article-image

Ariel Bravy/Shutterstock, modified by Blockworks

share

Cboe Global Markets has made its third attempt to secure regulatory approval for a spot Bitcoin ETF from the US Securities and Exchange Commission (SEC). 

The ARK 21Shares Bitcoin ETF, if approved, would allow investors to gain exposure to Bitcoin without owning the digital currency directly.

The proposed ETF, a collaboration between Cathie Wood’s Ark Invest and crypto investment product firm 21Shares, aims to list and trade on the Cboe BZX exchange, Reuters reported on Tuesday. It marks the latest effort by Cboe, following two previous unsuccessful attempts to list and trade the same ETF. 

Cboe BZX Exchange is one of the largest US equities market operators on any given day, clocking $1.4 billion in 24-hour trade volume. It is owned and operated by Cboe Global Markets, which also owns the Chicago Board Options Exchange and other exchanges around the world.

The operator has made attempts to list and trade the ARK 21Shares Bitcoin ETF in the past, including in May 2022 and August 2021. They were both rejected on the grounds the product did little to prevent fraud, according to the SEC.

The regulator has historically been cautious about such proposals, citing concerns over potential market manipulation and the lack of transparency in the crypto market.

To date, the SEC has rejected more than a dozen other proposals for spot bitcoin ETFs over a number of years, including from prominent firms such as Grayscale, Fidelity, and NYDIG. 

Despite the regulator’s reservations, the increasing demand for bitcoin and other digital assets has fueled a renewed push for regulatory approval of crypto-based financial products.

That’s led to the creation of US-based bitcoin futures ETFs, most notably from issuers Proshares, Valkyrie and VanEck, which have been available for nearly two years.

But a spot bitcoin ETF remains elusive. Comparable products are available in developed markets outside the US, and the SEC has faced criticism for its intransigence, to the point where Grayscale is suing the agency.


Get the news in your inbox. Explore Blockworks newsletters:

Tags

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

Upcoming Events

Javits Center North | 445 11th Ave

Tues - Thurs, March 24 - 26, 2026

Blockworks’ Digital Asset Summit (DAS) will feature conversations between the builders, allocators, and legislators who will shape the trajectory of the digital asset ecosystem in the US and abroad.

recent research

Research Report Templates (27).png

Research

Solana's spot trading landscape will remain bifurcated: prop AMMs will own the short-tail of highly liquid pairs, while passive AMMs continue drifting toward the long-tail. Both can win via vertical integration, but in opposite directions: passive AMMs are moving closer to users through token issuance platforms (e.g., Pump-PumpSwap, MetaDAO-Futarchy AMM), while prop AMMs are moving down the stack into transaction landing services and infrastructure (e.g., HumidiFi-Nozomi). The venues most at risk are legacy AMMs with limited end-user control and no durable, launch-driven source of order flow.

article-image

Some systems improve by failing — and crypto has no choice

article-image

Yield Basis introduces an IL-free AMM design that already dominates BTC DEX liquidity

article-image

Maybe tokenholders don’t need the rights that corporate shareholders have come to expect

article-image

As Hyperliquid and Lighter battle for perps DEX dominance, Boros could capture the structural upside

article-image

Investors are often right about the future, but wrong about the returns

article-image

A look back at 2025, reflections on our industry, and what it means for Blockworks in 2026