Blue Star Capital plc shares fell 10% to 11.5p after an update on investee SatoshiPay flagged a security incident.
The investing company said a software exploit on the Hyperbridge protocol allowed an attacker to mint around 1 billion bridged DOT tokens, which were swapped via SatoshiPay-linked liquidity pools.
Total losses from the incident are estimated at US$2.5 million, with SatoshiPay’s exposure around US$250,000.
The company said the issue stemmed from a third-party protocol rather than SatoshiPay’s own systems, with its Pendulum and Vortex networks operating as intended and user funds remaining secure.
SatoshiPay has removed liquidity from affected pools and is pursuing recovery efforts alongside ecosystem partners.
Separately, the group highlighted progress elsewhere, including integrations for its Pendulum FX decentralised exchange and ongoing development of its Vortex payments infrastructure.
It also confirmed progress towards a North American launch through its AlfredPay cross-border payments partnership.
AlfredPay will serve as a cornerstone for the North American operations of Vortex, and SatoshiPay will aim to leverage AlfredPay's infrastructure to enable broader access to stablecoin-powered payment solutions.
Live testing in a restricted production environment has begun ahead of the North American launch for SatoshiPay, with management planning to target Mexico and Colombia next.