Historical shareholding details of
                        
                        Dr. John T.C. Lee, PhD
                        
                        holdings in MKS Instruments, Inc. (MKSI)
                    
                    
                        Monthly changes of
                        
                        Dr. John T.C. Lee, PhD
                        
                        shareholding in MKS Instruments, Inc.
                        over the previous
                        months 
                    
                    
            
                
                    
                        | 
                            
                                Month
                            
                         | 
                        Name | 
                        Total no. shares held | 
                        
                        Percent Holding | 
                        
                        
                    
                    
                        
                        
                    
                
                
                    
                        
                            
                        
                        
                            | 
                                Feb 18, 2025
                             | 
                            
                                
                                    Dr. John T.C. Lee, Phd
                                
                             | 
                            
                                147,117
                             | 
                            
                            
                                0.27%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Dec 06, 2024
                             | 
                            
                                
                                    Dr. John T.C. Lee, Phd
                                
                             | 
                            
                                112,688
                             | 
                            
                            
                                0.21%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Feb 15, 2024
                             | 
                            
                                
                                    Dr. John T.C. Lee, Phd
                                
                             | 
                            
                                112,441
                             | 
                            
                            
                                0.20%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Dec 01, 2023
                             | 
                            
                                
                                    Dr. John T.C. Lee, Phd
                                
                             | 
                            
                                78,138
                             | 
                            
                            
                                0.14%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Feb 15, 2023
                             | 
                            
                                
                                    Dr. John T.C. Lee, Phd
                                
                             | 
                            
                                77,862
                             | 
                            
                            
                                0.14%
                             | 
                            
                            
                        
                    
                
            
         
                 
                
                    
                        View all ownership details of MKS Instruments, Inc.