The NYSE is proposing to amend NYSE Rule 107B to add a class of Supplemental Liquidity Providers ("SLP") that would be registered as market makers at the Exchange.  Rule 107B, which was adopted as a pilot program in October 2008, established a new class of off-Floor market participants referred to as Supplemental Liquidity Providers or "SLPs."  Approved Exchange member organizations are eligible to be an SLP. SLPs, which supplement the liquidity provided by Designated Market Makers ("DMM"), have monthly quoting requirements that may qualify them to receive SLP rebates - larger than the general rebate available to non-SLP market participants.  The goal of the SLP program is to encourage participants to quote more often and to add displayed liquidity to the market. Thus, Rule 107B(a) requires that an SLP maintain a bid and/or an offer at the NBB or NBO averaging at least 10% of the trading day for each assigned security.  In addition, an SLP must provide an average daily volume ("ADV") of more than 10 million shares for all assigned SLP securities on a monthly basis.  Meeting this volume requirement will enable an SLP to receive the basic SLP rebate (currently $0.0020 per executed share) on security-by-security basis and to maintain their SLP status. To qualify as an SLP under Rule 107B(c), a member organization is subject to a number of conditions, including adequate trading infrastructure to support SLP trading activity, quoting and volume performance that demonstrates an ability to meet the 10% ADV requirement, and the use of specified SLP mnemonics.  In addition, the business unit of the member organization acting as an SLP must enter proprietary orders only and have adequate information barriers between the SLP unit and any member organization’s customer, research, and investment banking business.  Pursuant to Rule 107B(h)(2)(A), a DMM may also be an SLP, but not in the same securities in which it is registered as a DM. For further details - and there are many, go to:  [NYSE Rule Filing 12-10, 4/4/23].