According to PANews, the deadline for the first quarter 13-F filings was May 15th. It has been reported that 168 asset management companies have disclosed their holdings in BlackRock's IBIT in their submitted 13-F documents. The two largest of these firms are located in Hong Kong. The 13-F filings are a quarterly report that is required to be submitted to the U.S. Securities and Exchange Commission by institutional investment managers. The report provides insights into what the firms have been buying and selling. However, it should be noted that the information in the 13-F filings is backward-looking, meaning it reflects the holdings of the firms as of the end of the last quarter. The holdings and strategies of these firms may have changed since then. BlackRock's IBIT is a popular investment among these firms. The two largest firms holding BlackRock's IBIT are based in Hong Kong, indicating a significant interest in this investment in the region.