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 Pension  
                                    Plan pursuant to regular standing          
                                    instruction) by child under 18 years.      
                                                                               
Reason for Notification             A transaction required to be notified in   
                                    accordance with DTR 3.1.4R(1) (a) and DTR  
                                    3.1.4(R) (1) (b)                           
                                                                               
Class of Security                   Ordinary 2.5p shares                       
                                                                               
Name of registered holder           Alliance Trust Savings Nominees Limited    
                                                                               
Number of shares                    18                                         
                                                                               
Price per share                     £3.58                                      
                                                                               
Date and place of transaction       1 August 2007. UK.                         
                                                                               
Date Company Notified               2 August 2007.                             
                                                                               
Total share interests following     99,359                                     
this information:                                                              
                                                                               
Total percentage of issued class    0.015% (all interests)                     
                                                                               
This notification does not relate to dealings by persons otherwise connected   
with the named director.                                                       
                                                                               
Name of contact                   Mr. Donald McPherson                         
                                                                               
Telephone Number                  [phone]                           
                                                                               
Date of notification              2 August 2007