Argo Blockchain Shares Fall After Workers Accidentally Share Non-Public Information

The bitcoin miner said employees disclosed potential hashrate upside and the cost to build a new facility in Texas, which was then shared in a tweet.

AccessTimeIconNov 5, 2021 at 2:20 p.m. UTC
Updated May 11, 2023 at 7:06 p.m. UTC
10 Years of Decentralizing the Future
May 29-31, 2024 - Austin, TexasThe biggest and most established global hub for everything crypto, blockchain and Web3.Register Now

The American depositary shares of Argo Blockchain (ARBK), the London-based crypto miner, fell as much as 5% in early U.S. trading, after the company said in a filing that some employees had inadvertently disclosed potentially material non-public information in a conversation. Shares subsequently recovered some and were down about 1% as of the time of publishing.

“During the meeting, these representatives intended to review and explain previously published or publicly available information regarding Argo, but inadvertently disclosed certain information that could be viewed as material non-public information under U.S. securities laws or inside information under U.K. securities laws,” the company said in the filing with the London Stock Exchange.

Argo’s employees held a conversation with a person named Anthony Coyle that Coyle subsequently published on Twitter, the filing said. The discussion contained non-public information, including the potential increase in the company’s hashrate and the expected cost to build its planned facility in Texas, according to the filing.

Argo didn’t disclose which employees held the conversation, nor which Anthony Coyle published them on Twitter. CoinDesk couldn’t immediately identify the referenced tweets.

According to the filing, Coyle wrote in his tweet that the miner increased its hashrate by 25% by using immersion cooling, while Argo now says it doesn’t have sufficient data to make those claims. However, the technology is expected to make the mining machines more efficient and extend the lives of the older computers, the company said.

Moreover, the unnamed Argo employees also said that the total cost to build its 800 megawatt mining facility in Texas could be $1.5 billion to $2 billion. The miner said the range was based on several assumptions that could change, potentially causing the cost range to “differ materially” from what its employees shared.

Argo listed its American depositary shares on Nasdaq in September, and its stock is up roughly 3% since then, while the price of bitcoin has climbed about 37% over the same time period. Recently, the miner reported its third quarter earnings, where it achieved record revenue and EBITDA, while mining 597 bitcoin during the quarter.

On Oct. 18, a slew of investment firms kicked off coverage of Argo with “buy” ratings, saying the company’s Texas facility should propel shares higher.


Please note that our privacy policy, terms of use, cookies, and do not sell my personal information has been updated.

The leader in news and information on cryptocurrency, digital assets and the future of money, CoinDesk is an award-winning media outlet that strives for the highest journalistic standards and abides by a strict set of editorial policies. In November 2023, CoinDesk was acquired by Bullish group, owner of Bullish, a regulated, institutional digital assets exchange. Bullish group is majority owned by; both groups have interests in a variety of blockchain and digital asset businesses and significant holdings of digital assets, including bitcoin. CoinDesk operates as an independent subsidiary, and an editorial committee, chaired by a former editor-in-chief of The Wall Street Journal, is being formed to support journalistic integrity.

Aoyon Ashraf

Aoyon Ashraf is managing editor with more than a decade of experience in covering equity markets

Learn more about Consensus 2024, CoinDesk's longest-running and most influential event that brings together all sides of crypto, blockchain and Web3. Head to to register and buy your pass now.

Read more about