Rubrik is trading 4.12% down now at $119.98; available reporting does not establish a specific company announcement as the cause of the October 12 decline. - The reported CTO stock sale took place October 5–7 under a prearranged Rule 10b5-1 plan, making it context rather than a confirmed cause. - The market backdrop was mixed, with supplied index figures showing only modest moves. - Rubrik’s October 9 Code Guardian announcement was positive prior news, not an evident explanation for this drop.