Director/PDMR Shareholding

Announcement of Director's interests in securities by Alliance Trust PLC       
                                                                               
Director's interests in securities                                             
                                                                               
Name of Company                    Alliance Trust PLC                          
                                                                               
Name of Director                   Lesley Mary Samuel Knox                     
                                                                               
Type of Transaction                Increase in beneficial interest following   
                                   purchase of shares (within Select ISA       
                                   pursuant to regular standing order and      
                                   standing election).                         
                                                                               
Reason for Notification            A transaction required to be notified in    
                                   accordance with DR 3.1.4R(1) (a) and DR     
                                   3.1.4(R) (1) (b) [section 324 as extended by
                                   section 328 of the Companies Act 1985 or    
                                   entered into the Company's register in      
                                   accordance with s325(3) or (4)of the        
                                   Companies Act 1985]                         
                                                                               
Class of Security                  Ordinary 2.5p shares                        
                                                                               
Name of registered holder          Alliance Trust Savings Nominees Limited     
                                                                               
Number of shares                   166                                         
                                                                               
Price per share                    £3.46                                       
                                                                               
Date and place of transaction      12 September 2006. UK.                      
                                                                               
Date Company Notified              13 September 2006.                          
                                                                               
Total share interests following    88,585                                      
this information:                                                              
                                                                               
Total percentage of issued class   0.013% (all interests)                      
                                                                               
This notification does not relate to dealings by persons otherwise connected   
with the named director.                                                       
                                                                               
Name of contact                    Mr. Ian Anderson                            
                                                                               
Telephone Number                   01382 201700                                
                                                                               
Date of notification               13 September 2006