According to The Block, first-quarter 13F filings reveal a sharp divergence among institutional crypto ETF holders. Abu Dhabi sovereign wealth fund Mubadala boosted its BlackRock iShares Bitcoin Trust (IBIT) stake to 14.7 million shares, worth nearly $660 million, while Harvard University slashed its IBIT holdings another 43% to 3.04 million shares and fully exited its $86.8 million BlackRock spot ether ETF position. Dartmouth College disclosed one of the first institutional endowment positions in a Solana ETF, purchasing $3.67 million of the Bitwise Solana Staking ETF. Barclays disclosed 4.46 million IBIT shares alongside put and call options, while Hong Kong-based Laurore trimmed its IBIT stake by 22%.