ChainCatcher news indicates that the hedge fund Jane Street has increased its positions in spot Bitcoin ETFs in the second quarter, according to the 13-F filing submitted to the SEC. In the second quarter, it held 8 spot BTC ETFs with a total value of approximately $690 million, compared to about $634 million in BTC ETF assets held in Q1.Among these, Jane Street reduced its holdings in Grayscale GBTC by 83%, with a reduction amounting to about $100 million, currently holding assets of approximately $16.56 million; it increased its holdings in Invesco BTCO by 142%, currently holding assets of approximately $12.54 million; and it increased its holdings in Franklin EZBC by 183%, currently holding assets of approximately $13.48 million. Additionally, Jane Street has increased its holdings in BlackRock IBIT for the first time, currently holding assets of approximately $220 million.Details of Jane Street's adjustments in the 8 spot BTC ETFs compared to Q1 are shown in the chart below: