According to Lookonchain's April 19th spot bitcoin ETF data: 1. Grayscale reduced its holdings by 2,195 BTC, valued at approximately $141.68 million, and now holds 306,399 BTC, valued at approximately $19.78 billion; 2. Fidelity increased its holdings by 590 BTC, valued at approximately $38.1 million, and now holds 152,465 BTC; 3. 9 ETFs reduced their holdings by 472 BTC, valued at approximately $30.44 million.