Federal Register #SR-MIAX-2026-21

SEC Notice: Proposed Rule Change for MIAX Exchange Rule 515A

This notice announces a proposed rule change by the Securities and Exchange Commission (SEC) regarding the Miami International Securities Exchange, LLC (MIAX): - The SEC is the government agency involved, acting as regulator rather than buyer - MIAX proposes to amend Exchange Rule 515A, which governs the MIAX Price Improvement Mechanism (PRIME) and PRIME Solicitation Mechanism - The amendment would allow Market Makers assigned to an options class to be solicited as contra parties in PRIME or cPRIME Auctions - This change is intended to enhance price improvement opportunities and increase liquidity in these auctions - No Original Equipment Manufacturers (OEMs), vendors, or commercial products/services are mentioned - No procurement of goods or services is requested, and no part numbers or quantities are specified - The notice is a regulatory action, not a solicitation for procurement

Description

This notice pertains to a proposed rule change filed by Miami International Securities Exchange, LLC to amend Exchange Rule 515A concerning the MIAX Price Improvement Mechanism (PRIME) and PRIME Solicitation Mechanism. The amendment permits orders for the accounts of Market Makers assigned in the applicable options class to be solicited as contra parties in PRIME or cPRIME Auctions. The change aims to enhance price improvement opportunities and increase liquidity in these auctions. The Securities and Exchange Commission has issued a notice of filing and made the rule change immediately effective.

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