Lookonchain monitoring data shows that on May 30th, the US spot Bitcoin ETF data showed that Grayscale GBTC reduced its holdings by 1,550 Bitcoins, worth about 105.8 million US dollars. Grayscale currently holds a total of 287,443 Bitcoins, worth about 19.6 billion US dollars. BlackRock increased its holdings by 364 Bitcoins, worth about 24.86 million US dollars, and currently holds a total of 289,035 Bitcoins, worth about 19.72 billion US dollars. Nine Bitcoin ETFs collectively reduced their holdings by 667 Bitcoins, worth about 45.5 million US dollars.