The CAT Funding Model contemplates two categories of CAT fees: (1) CAT fees assessed by CATLLC to CAT Executing Brokers to recover a portion of historical CAT costs previously paid to CATLLC by the Participants (referred to as “Historical CAT Assessment” fees), and (2) CAT fees assessed by CATLLC to CAT Executing Brokers and Participants to fund prospective CAT costs (referred to as “Prospective CAT Costs” fees). Fee rates will be determined by CATLLC and will be subject to the Plan Participants filing fee filings with the SEC to implement the given fee rate on behalf of CATLLC. Fee rates also will be announced via CAT Fee Alert. For additional information regarding current CAT fees, please refer to the CAT Fee Alerts.