Citadel Entities and Kenneth Griffin's Ownership in Quantum Computing Inc.

The filing is a Schedule 13G submitted by Citadel Advisors LLC, Citadel Advisors Holdings LP, Citadel GP LLC, Citadel Securities LLC, Citadel Securities Group LP, Citadel Securities GP LLC, and Kenneth Griffin, collectively referred to as the Reporting Persons. The filing discloses their ownership in Quantum Computing Inc. as of October 2, 2025. Citadel Advisors LLC, Citadel Advisors Holdings LP, and Citadel GP LLC each beneficially own 5,828,555 shares, representing 3.1% of the outstanding shares. Citadel Securities LLC owns 2,827,051 shares (1.5%), while Citadel Securities Group LP and Citadel Securities GP LLC each own 3,416,384 shares (1.8%). Kenneth Griffin beneficially owns 9,244,939 shares, representing 4.9% of the outstanding shares. The filing is made pursuant to Rule 13d-1(c) under the Securities Exchange Act of 1934, and the Reporting Persons certify that the shares were not acquired for the purpose of influencing the control of the issuer.