On December 13, 2022, Rubicon Technology, Inc notified The Nasdaq Stock Market LLC of the Company's decision to voluntarily delist its common stock from the Nasdaq Capital Market and its intent to file a Form 25 with the U.S. Securities and Exchange Commission on or about December 23, 2022. As a result, the Company expects the delisting of its common stock to become effective on December 30, 2022.