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Effective Rule Filings Rule Filings

SR-MEMX-2026-01: Proposal to Amend Rule 19.3

Date Filed: January 7, 2026 Description: Proposal to Amend Rule 19.3 to allow for the listing and trading of options on certain Commodity-Based Trusts.

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Effective Rule Filings Rule Filings

SR-MEMX-2025-36: Proposal to Amend the Exchange’s Options Fee Schedule

Date Filed: December 31, 2025 Description: Proposal to amend the Exchange’s Options Fee Schedule related to the Options Regulatory Fee (“ORF”).

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Effective Rule Filings Rule Filings

SR-MEMX-2025-35: Proposal to Amend the Exchange’s Options Fee Schedule

Date Filed: December 30, 2025 Description: Proposal to amend the routing fees for MEMX Options.

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Effective Rule Filings Rule Filings

SR-MEMX-2025-34: Proposal to Amend the Exchange’s CAT Compliance Rules

Date Filed: December 11, 2025 Description: Proposal to amend Rule 4.7 of the Exchange’s CAT Compliance Rule to be consistent with the CAT NMS Plan that requires broker-dealers with a reporting obligation to the CAT to report whether an original receipt or origination of an order to sell an equity security is a short sale […]

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Effective Rule Filings Rule Filings

SR-MEMX-2025-33: Proposal to Amend Rule 11.6(q)(1), Round Lot

Date Filed: November 25, 2025 Description:  Proposal to amend Rule 11.6(q)(1), Round Lot, to conform with a recent amendment to the definition of round lot under Rule 600 of Regulation NMS recently approved by the Commission. The Exchange also proposes to make conforming, non-substantive changes to Exchange Rules 11.9(b)(2)(A)-(D) and Exchange Rule 11.20(d)(1). 

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Effective Rule Filings Rule Filings

SR-MEMX-2025-32: Proposal to Amend Rule 13.4(a) to Reflect the Operation of 24X Exchange

Date Filed: November 19, 2025 Description: Proposal to amend Rule 13.4(a) to reflect the current operation of 24X Exchange.

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Effective Rule Filings Rule Filings

SR-MEMX-2025-31: Proposal to Amend The Exchange’s Fee Schedule

Date Filed: September 30, 2025 Description: Proposal to amend the Exchange’s Fee Schedule to (i) increase the base rebates for Added Non-Displayed Volume in securities priced at or above $1.00 per share; (ii) increase the base rebates for Added Non-Displayed Sub-Dollar Volume; (iii) increase the base rebates provided for Added Displayed Sub-Dollar Volume; (iv) eliminate […]

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Effective Rule Filings Rule Filings

SR-MEMX-2025-29: Proposal to Amend Rule 11.6

Date Filed: September 8, 2025 Description: Proposed rule change to amend Rule 11.6(a) to clarify the handling of orders that contain both a Post Only instruction and certain other order handling instructions maintained to facilitate compliance with Rule 610(d) of Regulation NMS.

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Effective Rule Filings Rule Filings

SR-MEMX-2025-28: Proposal to Amend the Exchange’s Fee Schedule

Date Filed: September 8, 2025 Description: Proposal to amend the Exchange’s Fee Schedule to: (i) modify the required criteria under Liquidity Provision Tiers 1 and 2; and (ii) adopt a new Tape B Volume Tier.

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Effective Rule Filings Rule Filings

SR-MEMX-2025-26: Proposal to Amend Position and Exercise Limits for Options on Certain Bitcoin ETFs

Date Filed: August 19, 2025 Description: Proposal to amend the position and exercise limits for options on the iShares Bitcoin Trust ETF, Grayscale Bitcoin Trust ETF, Grayscale Bitcoin Mini Trust and Bitwise Bitcoin ETF.