On August 12, 2021, Miami International Securities Exchange LLC (“Exchange”) filed with the Securities and Exchange Commission (“Commission”), pursuant to Section 19(b)(1) of the Securities Exchange Act of 1934 (“Act”),^[1] and Rule 19b-4 thereunder,^[2] a proposed rule change to amend the Exchange's fee schedule to revise the Options Regulatory Fee charged starting August 12, 2021. The proposed rule change was immediately effective upon filing with the Commission pursuant to Section 19(b)(3)(A) of the Act.^[3] The proposed rule change was published for comment in the Federal Register on August 27, 2021.^[4] The Commission received one comment letter on the proposal from the Exchange noting that it planned to withdraw File No. MIAX-2021-38.^[5] On October 7, 2021, the Exchange withdrew the proposed rule change (SR-MIAX-2021-38).