Exhibit 99.1 THE LGL GROUP, INC. ANNOUNCES COMMENCEMENT OF SHARE REPURCHASE ORLANDO, FL. – September 18, 2025 – The LGL Group, Inc. (NYSE American: LGL) ("LGL," "LGL Group," or the "Company") announced today that its Board of Directors authorized the commencement of the repurchase of $500,000 to$700,000 of shares of LGL Group common stock under its existing share repurchase plan at such times, amounts and prices management deems appropriate. The repurchase will be made subject to availability and relative ...