According to Decrypt.The $7.2 trillion asset manager now owns half a billion dollars worth of Riot Blockchain and Marathon Digital shares. Vanguard Group upped its Marathon Digital holdings by 60% from 10.9 million shares to 17.5 million. Marathon Digital—which trades on the Nasdaq under the ticker MARA—is currently trading for $16.03 per share, meaning Vanguard’s investment stands at $280.5 million in shares.

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