Chun-Jung Tsai Increases Stake in Ainos, Inc. to 8.06% Following RSU Vesting

Chun-Jung Tsai filed a Schedule 13D/A on April 17, 2026, disclosing an increased position in Ainos, Inc. (AIMD). The reporting person now beneficially owns 686,999 shares of Common Stock, representing 8.06% of the class. This change follows the acquisition of 330,000 restricted stock units (RSUs) granted under the Ainos, Inc. 2023 Stock Incentive Plan, all of which are fully vested. The shares are subject to a voting agreement between the reporting person and Ainos Inc., a Cayman Islands corporation. The ownership percentage calculation accounts for a total of 8,524,542 shares outstanding, which includes the issuer's shares as of March 30, 2026, subsequent service fee issuances, and the 1,239,000 shares granted and vested under the incentive plan on April 15, 2026. The reporting person currently has sole dispositive power over the 686,999 shares but shares voting power. No other transactions were reported in the 60 days preceding this filing.