Director/PDMR Shareholding

Director's interests in securities


Name of Company             The Alliance Trust PLC

Name of Director            Mrs Lesley M S Knox

Type of Transaction         Increase in beneficial interest
                            following purchase of shares
                            (within ISA pursuant to regular
                            standing order and standing
                            election).

Class of Security           Ordinary 25p shares

Name of registered holder   Alliance Trust Savings Nominees
                            Limited

Number of shares            9

Price per share             £33.10

Date of transaction         20 December 2005

Date Company informed       21 December 2005

Total holdings following    2,157
this information

Total percentage of issued  0.004%
class



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        21 December 2005