Grayscale Cardano Trust and Tuttle Capital 2X Cardano have filed applications for ADA exchange-traded funds (ETFs) with the U.S. Securities and Exchange Commission (SEC). The final deadlines for these applications are set for October 23, 2025, and October 10, 2025, respectively. However, the approval process faces delays due to the SEC's limited staffing and the ongoing U.S. government shutdown, which could impact the expected 'ETF Cryptober' event.