The State of Wisconsin Investment Board revealed in a Tuesday 13F filing that it held nearly $100 million of the iShares Bitcoin Trust, the spot bitcoin exchange-traded fund out of the investment manager BlackRock, at the end of the first quarter of 2024. 

The Board owned 2,450,400 shares of the ETF valued at $99,167,688 and 1,013,000 shares of the Grayscale Bitcoin Trust (GBTC) worth around $63,687,310 at the end of March, according to the filing with the Securities and Exchange Commission.

Shares of other cryptocurrency firms such as Coinbase, Marathon Digital, Riot Platforms, Block, Cipher Mining, Cleanspark and MicroStrategy were also in the Board's portfolio. 

The State of Wisconsin Investment Board is a Wisconsin state agency that manages investments for public …