Historical shareholding details of
                        
                        Mr. Dale M. Gibbons
                        
                        holdings in Western Alliance Bancorp (WAL)
                    
                    
                        Monthly changes of
                        
                        Mr. Dale M. Gibbons
                        
                        shareholding in Western Alliance Bancorp
                        over the previous
                        months 
                    
                    
            
                
                    
                        | 
                            
                                Month
                            
                         | 
                        Name | 
                        Total no. shares held | 
                        
                        Percent Holding | 
                        
                        
                    
                    
                        
                        
                    
                
                
                    
                        
                            
                        
                        
                            | 
                                Oct 30, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                300,358
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Oct 15, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                296,358
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Sep 15, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                296,358
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Aug 15, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                296,358
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Jul 15, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                296,358
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Jun 15, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                296,358
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                May 15, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                296,358
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Apr 15, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                296,358
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Mar 15, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                296,358
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Feb 15, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                296,358
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Feb 08, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                296,358
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Jan 15, 2025
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Dec 15, 2024
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Nov 15, 2024
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Oct 15, 2024
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Sep 15, 2024
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Aug 15, 2024
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Jul 15, 2024
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Jun 15, 2024
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                May 15, 2024
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Apr 15, 2024
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Mar 15, 2024
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Feb 15, 2024
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                294,726
                             | 
                            
                            
                                0.29%
                             | 
                            
                            
                        
                    
                        
                            
                                
                                    | 
                                     | 
                                    
                                    
                                
                                
                        
                        
                            | 
                                Feb 16, 2023
                             | 
                            
                                
                                    Mr. Dale M. Gibbons
                                
                             | 
                            
                                281,506
                             | 
                            
                            
                                0.27%
                             | 
                            
                            
                        
                    
                
            
         
                 
                
                    
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