** Shares of neurotech firm Helius Medical Technologies HSDT.O jump 222.62% to $24.34
** Company says it has raised over $500 million to launch a treasury called "SOL Treasury Company" to buy and hold Solana's cryptocurrency as its main asset
** Says the funding round was oversubscribed and expects to grow the fund to $1.25 billion
** The offering was led by institutional and crypto-native investors such as Pantera Capital, Summer Capital and other prominent backers
** As of last close, stock down 98.5% YTD
(Reporting by Siddhi Mahatole)
((siddhi.mahatole@thomsonreuters.com))