BULL Inc. (Headquarters: Utsunomiya City, Tochigi Prefecture, Founder & CEO: Kyoshi Uto, hereinafter "BULL"), a company engaged in space debris countermeasures, announced today that it has achieved its first on-orbit demonstration success for its Post-Mission Disposal (PMD) device "HORN". The demonstration involved the HORN-L and HORN-R experimental units, launched on the H3 rocket No. 6 on June 12, 2026. The success was confirmed through observation of orbital decay based on TLE data* and optical imaging of the deployed membrane. * TLE (Two-Line Element set) is a data format that expresses the orbital information of artificial satellites and other objects in space. ■ Success Criteria and Results of This Demonstration BULL defined the evaluation metrics for this demonstration as follows and proceeded with the assessment and verification of its achievements. Based on the on-orbit demonstration results, the following "Minimum Success" and "Full Success" have been confirmed to date: 1. Minimum Success: Confirmation of Superior Orbital Decay Speed [Achieved] Criterion: To confirm that the orbital decay speed of the HORN-equipped unit is faster than that of other satellites of similar size, based on orbital data (TLE). Result: It was confirmed that the orbital decay speed of HORN-L and HORN-R is significantly faster compared to a similarly sized comparative satellite (VERTECS*). This confirms that the device deployed as designed and is fulfilling its orbital decay function. 2. Full Success: Confirmation and Estimation of On-Orbit Deployment Status [Achieved] Criterion: To be able to estimate and confirm the deployment status (shape and area) of HORN through observation. Result: Optical images of both HORN-L and HORN-R were successfully acquired by a satellite from HEO, a company providing on-orbit imaging services. The images confirmed that the membrane areas, as designed (HORN-L: approx. 20 sq. meters, HORN-R: approx. 10 sq. meters), were deployed in orbit. We have demo