MRT Capacity Release Offers

                                                                                                                                                                                                                                                    
                                                                                                                                                                                                                                                 
 KEY:600005301                                                                                                                                                                                                                                            
 Transportation Service Provider Name(TSP Name)                      Page     1                                                                                                                                                                           
 Enable Mississippi River Transmission, LLC                                                                                                                                                                                                               
 Transportation Service Provider(TSP): 00 696 8077                                                                                                                                                                                                        
 Contract Holder(K Holder) 00 693 6017                                                                                                                                                                                                                    
 Contract Holder Name(K Holder Name)AMEREN ILLINOIS COMPANY DBA                                                                                                                                                                                           
 Contract Begin Date (K Beg Date): 5/1/2004                                                                                                                                                                                                               
 Contract End Date (K End Date): 5/15/2026                                                                                                                                                                                                                
                         Status  00                                                                                                                                                                                                                       
                         Capacity Offer  5301                                                                                                                                                                                                             
                                                                                                                                                                                                                                                          
 Posting Date: 3/11/2025                       Receipt Date: 3/11/2025                                                                                                                                                                                    
 Posting Time: 15:39      Central Time Zone    Receipt Time: 12:42                                                                                                                                                                                        
 Biddable Deal Indicator Description: Biddable deal                                                                                                                                                                                                       
                                                                                                                                                                                                                                                          
 Bid Period Start Date: 3/12/2025      Bid Period Start Time: 9:00                                                                                                                                                                                        
 Bid Period End Date: 3/12/2025          Bid Period End Time: 10:00                                                                                                                                                                                       
 Capacity Award Date/Time: 3/12/2025  11:00                                                                                                                                                                                                               
 Seasonal Start Date: N/A              Seasonal End Date: N/A                                                                                                                                                                                             
 Releaser/Return Addressee:   6 93 6017                                                                                                                                                                                                                   
 Releaser Name/Return Addressee Name: AMEREN ILLINOIS COMPANY DBA                                                                                                                                                                                         
 Releaser Contract Number: 3620                                                                                                                                                                                                                           
 Releaser Contact Name: RYAN MCKINNEY                   Rel Fax: 314 554 3800                                                                                                                                                                             
 Releaser Contact Phone Number: 618 301 5236                                                                                                                                                                                                              
 Rel E-mail: rmckinney@ameren.com                                                                                                                                                                                                                         
 Pipeline Contact: CUMMINGS, MONIQUE D.                Phone: 713 989 7959                                                                                                                                                                                
 Replacement Shipper Role Indicator: OTH                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                          
                Location/Quantity Release Term  Release Term     Maximum Offer                                                                                                                                                                            
  Offer Number    Type Indicator   Start Date    End Date      Quantity-Contract                                                                                                                                                                          
  (Offer No)         (Loc/QTI)    (Rel St Date)(Rel End Date) (Max Offer Qty-K)                                                                                                                                                                           
   --------          ----------    ----------   ----------        ------------                                                                                                                                                                            
       5301          3             4/1/2025     10/31/2025               10000                                                                                                                                                                            
                     Receipt Zone: FIELD   Delivery Zone: MARKT                                                                                                                                                                                           
  Market-Based Rate Indicator (Mkt Based Rate Ind): N                                                                                                                                                                                                     
     Discount Indicator(Disc Ind):                                                                                                                                                                                                                        
  Shorter Term Indicator(Shorter Term): N                                                                                                                                                                                                                 
          Minimum Term (Min Term): 10000                                                                                                                                                                                                                  
   Measurement Basis Description (Meas Basis Desc): Million BTU's                                                                                                                                                                                         
  Releasing Shipper Lesser Quantity Indicator: N                                                                                                                                                                                                          
 Minimum Offer Quantity - Contract: 10000                                                                                                                                                                                                                 
          Rate Schedule (Rate Sch): FT - Firm Transportation                                                                                                                                                                                              
 Reservation Rate Basis Description (Res Rate Basis Desc): Per day                                                                                                                                                                                        
 Surcharge Indicator/Surcharge Indicator Description:                                                                                                                                                                                                     
  5 - Rate(s) stated include only rates; no surcharges applicable                                                                                                                                                                                         
                                                                                                                                                                                                                                                          
    Surcharge Identification Code:                                                                                                                                                                                                                        
                 Total Surcharges:                                                                                                                                                                                                                        
 Overrun Responsibility Indicator (Ovr Resp Ind): RPS                                                                                                                                                                                                     
                  Negotiated Rate: No                                                                                                                                                                                                                     
               Rate Type Priority: Reservation Bids Have Priority                                                                                                                                                                                         
              Pct. or Dollar Bids:                                                                                                                                                                                                                        
    Accept Less Than Max Rate Bid: Yes                                                                                                                                                                                                                    
 Accept Greater Than Max Rate Bid:                                                                                                                                                                                                                        
        Min. Acceptable Res. Rate: 0.0600  Per Day                                                                                                                                                                                                        
        Min. Acceptable Vol. Rate:            Per Day                                                                                                                                                                                                     
 Minimum Volumetric Commitment Quantity:                                                                                                                                                                                                                  
  Releasing Shipper's Contingency Indicator(Rel SR Contng): N                                                                                                                                                                                             
        Contingency End Date/Time:                                                                                                                                                                                                                        
  Rate Identification Code (Rate ID): RES                                                                                                                                                                                                                 
                          Rate Bid:                                                                                                                                                                                                                       
 Maximum Offer Quantity - Contract:       10000                                                                                                                                                                                                           
           Bid Quantity - Contract:       10000                                                                                                                                                                                                           
               Maximum Tariff Rate:     0.2817                                                                                                                                                                                                            
 Percentage of Maximum Tariff Rate Bid: 100%                                                                                                                                                                                                              
 Pressure Base: 14.73 Pounds Per Square Inch (PSI)                                                                                                                                                                                                        
 Pressure Base Indicator Description: Pounds Per Square Inch Absolute                                                                                                                                                                                     
 Minimum Acceptable Percentage of Maximum Tariff Rate: 0%                                                                                                                                                                                                 
 Minimum Acceptable Rate: 0.0                                                                                                                                                                                                                             
 Minimum Rate Disclosure Indicator Description:       Disclosed                                                                                                                                                                                           
 Storage Inventory-Conditioned Release Indicator:    No                                                                                                                                                                                                   
 IBR Index-Based Capacity Release Indicator (IBR Ind): N                                                                                                                                                                                                  
 Transportation Service Provider Name(TSP Name)                      Page     2                                                                                                                                                                           
 Enable Mississippi River Transmission, LLC                                                                                                                                                                                                               
 Transportation Service Provider(TSP): 00 696 8077                                                                                                                                                                                                        
 Contract Holder(K Holder) 00 693 6017                                                                                                                                                                                                                    
 Contract Holder Name(K Holder Name)AMEREN ILLINOIS COMPANY DBA                                                                                                                                                                                           
 Contract Begin Date (K Beg Date): 5/1/2004                                                                                                                                                                                                               
 Contract End Date (K End Date): 5/15/2026                                                                                                                                                                                                                
                         Status  00                                                                                                                                                                                                                       
                         Capacity Offer  5301                                                                                                                                                                                                             
                                                                                                                                                                                                                                                          
 Previously Released Indicator Description:                                                                                                                                                                                                               
  Offer does not contain any capacity which was previously released.                                                                                                                                                                                      
 Allowable Re-release Indicator Description:                                                                                                                                                                                                              
   Not re-releasable                                                                                                                                                                                                                                      
 Permanent Release Indicator Description:                                                                                                                                                                                                                 
   Offer not made available for permanent release                                                                                                                                                                                                         
 Prearranged Deal Indicator Description:                                                                                                                                                                                                                  
   Offer is subject to a prearranged deal                                                                                                                                                                                                                 
         Affiliate Indicator:  None                                                                                                                                                                                                                       
 Prearranged Deal Match Date/Time:  3/12/2025   11:30                                                                                                                                                                                                     
                                                                                                                                                                                                                                                          
 Bid Evaluation Method Indicator Description: Highest Rate                                                                                                                                                                                                
 Bid Evaluation Method:                                                                                                                                                                                                                                   
                                                                                                                                                                                                                                                          
 Bid Tie-breaking Method: Pipeline's Method Referenced                                                                                                                                                                                                    
 Recall/Reput Indicator Description (Recall/Reput Desc):                                                                                                                                                                                                  
 Capacity recallable and reput must be taken by Replacement Shipper.                                                                                                                                                                                      
                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                          
 Recall/Reput Terms (Recall/Reput Terms):                                                                                                                                                                                                                 
                                             SEE BELOW                                                                                                                                                                                                    
                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                          
 Business Day Indicator: Y                                                                                                                                                                                                                                
 Recall Notification Period Indicator - Early Evening: Y                                                                                                                                                                                                  
 Recall Notification Period Indicator - Evening: Y                                                                                                                                                                                                        
 Recall Notification Period Indicator - Intraday 1: Y                                                                                                                                                                                                     
 Recall Notification Period Indicator - Intraday 2: Y                                                                                                                                                                                                     
 Recall Notification Period Indicator - Intraday 3: Y                                                                                                                                                                                                     
 Recall Notification Period Indicator - Timely: Y                                                                                                                                                                                                         
 Stand-alone Offer Indicator: Y                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                          
 Standard Terms: No                                                                                                                                                                                                                                       
 Special Terms and Miscellaneous Notes:                                                                                                                                                                                                                   
 The Replacement Shipper's nominated and allocated volumes must not result                                                                                                                                                                                
 increase in the rates otherwise paid by Ameren Illinois pursuant to any                                                                                                                                                                                  
 or negotiated rate agreement applicable to the capacity being released.                                                                                                                                                                                  
  The replacement shipper will be responsible for all penalties or UP-charg                                                                                                                                                                               
 the use of capacity which WILL be billed by Ameren Illinois. PRIMARY                                                                                                                                                                                     
 DELIVERY POINTS CANNOT BE CHANGED WITHOUT PRIOR APPROVAL                                                                                                                                                                                                 
  BY AMEREN ILLINOIS                                                                                                                                                                                                                                      
 Transportation Service Provider Name(TSP Name)                      Page     3                                                                                                                                                                           
 Enable Mississippi River Transmission, LLC                                                                                                                                                                                                               
 Transportation Service Provider(TSP): 00 696 8077                                                                                                                                                                                                        
 Contract Holder(K Holder) 00 693 6017                                                                                                                                                                                                                    
 Contract Holder Name(K Holder Name)AMEREN ILLINOIS COMPANY DBA                                                                                                                                                                                           
 Contract Begin Date (K Beg Date): 5/1/2004                                                                                                                                                                                                               
 Contract End Date (K End Date): 5/15/2026                                                                                                                                                                                                                
                         Status  00                                                                                                                                                                                                                       
                         Capacity Offer  5301                                                                                                                                                                                                             
                                                                                                                                                                                                                                                          
  Offer Location Level Rates/Quantity Information                                                                                                                                                                                                         
                                                                                                                                                                                                                                                          
  Location/Quantity Type Indicator Description:                                                                                                                                                                                                           
                 Receipt point(s) to delivery point(s) quantity                                                                                                                                                                                           
  Location Purpose: MQ                                                                                                                                                                                                                                    
  Location Purpose Description: Delivery Location                                                                                                                                                                                                         
                                                                                                                                                                                                                                                          
                 Maximum Offer                         Minimum Offer                                                                                                                                                                                      
  Offer Number Quantity-Location Quantity   Lesser  Quantity - Location   Segment                                                                                                                                                                         
  (Offer No)  (Max Offer Qty-Loc)   Basis  Quantity (Min Offer Qty-Loc) Indicator                                                                                                                                                                         
   -------       -----------    ---------  -----------  -----------     ---------                                                                                                                                                                         
      5301             10000        Dth/d      No             10000        Yes                                                                                                                                                                            
                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                          
               Location (Loc): 12745       (D)                                                                                                                                                                                                            
     Location Name(Loc Name): DUKE @ PERRYVILLE REC                                                                                                                                                                                                       
   Location OBA Indicator Description: An OBA is in effect                                                                                                                                                                                                
       Location Zone(Loc Zn): FIELD                                                                                                                                                                                                                       
                                                                                                                                                                                                                                                          
               Location(Loc): 805535       (D)                                                                                                                                                                                                            
     Location Name(Loc Name): AMEREN IL AGGREGATE                                                                                                                                                                                                         
   Location OBA Indicator Description: No OBA is in effect                                                                                                                                                                                                
       Location Zone(Loc Zn): MARKT                                                                                                                                                                                                                       
                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                          
     Bid Quantity - Location:       10000                                                                                                                                                                                                                 
  Releaser Designation of Acceptable Bidding Basis Description:                                                                                                                                                                                           
 Non-Index-Based Release - Absolute dollars and cents per unit basis                                                                                                                                                                                      
                                                                                                                                                                                                                                                          
                                                                                                                                                                                                                                                          
            Lesser Rates Allowed: Yes                                                                                                                                                                                                                     
           Max. Reservation Rate: 0.28170                                                                                                                                                                                                                 
           Min. Reservation Rate: 0.06000                                                                                                                                                                                                                 
            Min. Reservation Pct:                                                                                                                                                                                                                         
            Max. Volumetric Rate:                                                                                                                                                                                                                         
            Min. Volumetric Rate:                                                                                                                                                                                                                         
                                                                                                                                                                                                                                                          
 Minimum Volumetric Commitment Percentage:                                                                                                                                                                                                                
 Minimum Volumetric Commitment Percentage Evaluation Indicator: Y                                                                                                                                                                                         
 Minimum Acceptable Volumetric Commitment Percentage:                                                                                                                                                                                                     
                                                                                                                                                                                                                                                          
 Minimum Acceptable Volumetric Load Factor Percentage:                                                                                                                                                                                                    
  Rate Form/Type Code Description:                                                                                                                                                                                                                        
   Reservation charge only                                                                                                                                                                                                                                
 Transportation Service Provider Name(TSP Name)                      Page     4                                                                                                                                                                           
 Enable Mississippi River Transmission, LLC                                                                                                                                                                                                               
 Transportation Service Provider(TSP): 00 696 8077                                                                                                                                                                                                        
 Contract Holder(K Holder) 00 693 6017                                                                                                                                                                                                                    
 Contract Holder Name(K Holder Name)AMEREN ILLINOIS COMPANY DBA                                                                                                                                                                                           
 Contract Begin Date (K Beg Date): 5/1/2004                                                                                                                                                                                                               
 Contract End Date (K End Date): 5/15/2026                                                                                                                                                                                                                
                         Status  00                                                                                                                                                                                                                       
                         Capacity Offer  5301