Advent Technologies Holdings, Inc. (NASDAQ: ADN) experienced a notable increase in short interest in June, with 80,500 shares being shorted, marking a 12.9% rise from the previous month. Mirae Asset Global Investments Co. Ltd. recently acquired a significant position in Advent Technologies, purchasing 355,687 shares valued at around $64,000. This move helped solidify their ownership of 0.57% of the company's stock, while institutional investors collectively hold 17.52% of the shares. The company's stock price saw a positive trend, trading up by 3.9% and having a market cap of $7.84 million. Advent Technologies operates in the fuel cell and hydrogen technology markets across North America, Europe, and Asia, focusing on the development, manufacturing, and assembly of fuel cell systems and critical components that impact the performance of hydrogen fuel cells and other energy systems. With a 50-day moving average of $28.82 and a 200-day moving average of $13.61, Advent Technologies stands out in the advanced materials and technology development sector.