Historical shareholding details of
                        
                        Mr. Michael Feehan
                        
                        holdings in Ecovyst Inc (ECVT)
                    
                    
                        Monthly changes of
                        
                        Mr. Michael Feehan
                        
                        shareholding in Ecovyst Inc
                        over the previous
                        months 
                    
                    
            
                
                    
                        | 
                            
                                Month
                            
                         | 
                        Name | 
                        Total no. shares held | 
                        
                        Percent Holding | 
                        
                        
                    
                    
                        
                        
                    
                
                
                    
                        
                            
                        
                        
                            | 
                                Feb 03, 2025
                             | 
                            
                                
                                    Mr. Michael Feehan
                                
                             | 
                            
                                373,931
                             | 
                            
                            
                                0.27%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Jan 22, 2025
                             | 
                            
                                
                                    Mr. Michael Feehan
                                
                             | 
                            
                                348,257
                             | 
                            
                            
                                0.25%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Jan 05, 2025
                             | 
                            
                                
                                    Mr. Michael Feehan
                                
                             | 
                            
                                350,639
                             | 
                            
                            
                                0.26%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Aug 05, 2024
                             | 
                            
                                
                                    Mr. Michael Feehan
                                
                             | 
                            
                                364,799
                             | 
                            
                            
                                0.27%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Jan 22, 2024
                             | 
                            
                                
                                    Mr. Michael Feehan
                                
                             | 
                            
                                348,799
                             | 
                            
                            
                                0.25%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Aug 23, 2023
                             | 
                            
                                
                                    Mr. Michael Feehan
                                
                             | 
                            
                                340,940
                             | 
                            
                            
                                0.25%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Jul 01, 2023
                             | 
                            
                                
                                    Mr. Michael Feehan
                                
                             | 
                            
                                335,940
                             | 
                            
                            
                                0.25%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Mar 08, 2023
                             | 
                            
                                
                                    Mr. Michael Feehan
                                
                             | 
                            
                                410,998
                             | 
                            
                            
                                0.30%
                             | 
                            
                            
                        
                    
                
            
         
                 
                
                    
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