Normally the offer to buy would trigger Rule 13e-3 which requires a filing of Schedule 13E-3. (d)Material required to be filed. The issuer or affiliate engaging in a Rule 13e-3 transaction must file with the Commission: (1) A Schedule 13E-3 ( § 240.13e-100), including all exhibits; (2) An amendment to Schedule 13E-3 reporting promptly any material changes in the information set forth in the schedule previously filed; and (3) A final amendment to Schedule 13E-3 reporting promptly the results of the Rule 13e-3 transaction. (e)Disclosure of information to security holders. https://www.law.cornell.edu/cfr/text/17/240.13e-3