Polkadot stories

Aug 9, 2026

Grayscale Withdraws ETF Registration Applications for Cardano, Hedera, and Polkadot Within 190 Seconds

Grayscale Investments withdrew its S-1 registration statements with the SEC for spot ETFs tied to Cardano (ADA), Hedera (HBAR), and Polkadot (DOT) on August 7, 2026, with all three filings pulled within a 190-second window. No reason was provided for the withdrawals, and no securities had been issued or sold.

Aug 9, 2026·9 sources

Apr 16, 2026

Hyperbridge Revises Polkadot Bridge Exploit Losses to $2.5 Million, 10x Initial Estimate

Hyperbridge has raised its loss estimate from the Token Gateway exploit from an initial $237,000 to $2.5 million, with some funds traced to Binance. The Polkadot-Ethereum bridge protocol significantly underestimated the scope of the security breach.

Apr 16, 2026·2 sources

Apr 13, 2026

Hyperbridge Exploit Allows Attacker to Mint 1 Billion Polkadot Tokens, Nets $237K

An attacker exploited Polkadot-based Hyperbridge to mint 1 billion bridged DOT tokens on Ethereum through a forged cross-chain message, ultimately stealing approximately $237,000. Korean exchanges Upbit and Bithumb suspended DOT deposits and withdrawals.

Apr 13, 2026·3 sources

Top claims

▪Market prices for Cardano (ADA), Hedera (HBAR), and Polkadot (DOT) remained flat with no significant price movements following the withdrawal announcement.
▪Under SEC Rule 477(b), an application to withdraw a pre-effective registration statement is deemed approved upon filing unless the SEC objects within 15 days.
▪Grayscale Investments voluntarily withdrew its spot ETF registration applications for Cardano, Hedera, and Polkadot on August 7, 2026.

Topics

Crypto regulation Institutional crypto adoption Crypto ETFs Altcoins Crypto hacks

DeFi

Blockchain interoperability

Ethereum security

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Bridge exploit Security

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