Holding(s) in Company

RNS Number:0864Q
GW Pharmaceuticals PLC
24 January 2007


GW Pharmaceuticals plc
24 January 2007

TR-1: notification of major interests in shares

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

GW PHARMACEUTICALS PLC

2. Reason for the notification (please tick the appropriate box or
boxes)

- An acquisition or disposal of voting rights:

- An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to 
which voting rights are attached:

- An event changing the breakdown of voting rights:

- Other (please specify): X (INITIAL NOTIFICATION DUE TO CHANGE OF THRESHOLD)

3. Full name of person(s) subject to the notification obligation:

PRUDENTIAL PLC GROUP OF COMPANIES

4. Full name of shareholder(s) (if different from 3.):

SEE SECTION 9 BELOW

5. Date of the transaction (and date on which the threshold is crossed or reached if different):

20 JANUARY 2007

6. Date on which issuer notified:

22 JANUARY 2007

7. Threshold(s) that is/are crossed or reached:

5%

8. Notified details:

A: Voting rights attached to shares

Class/type of  Situation previous  Resulting situation after the triggering
shares         to the Triggering   transaction
               transaction
if possible
using the ISIN Number   Number of   Number   Number of voting    % of voting 
CODE           of       Voting      of       rights              rights
               Shares   Rights      shares

                                   Direct     Direct    Indirect Direct Indirect
GB0030544687  7,144,410 7,144,410  7,144,410  7,144,410  N/A     5.94%   N/A

B: Financial Instruments

Resulting situation after the triggering transaction

Type of    Expiration  Exercise/   Number of voting rights that may   % of
financial   date       Conversion  be acquired if the instrument is   voting
instrument             Period/     exercised/ converted.              rights
                       Date
N/A

Total (A+B)

Number of voting rights                      % of voting rights

7,144,410                                          5.94

9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively  held, if applicable:

                                      Holding          %

PRUDENTIAL PLC                        7,144,410      5.94%
M&G GROUP LIMITED                     7,144,410      5.94%
M&G INVESTMENT MANAGEMENT LIMITED     7,144,410      5.94%
M&G LIMITED                           7,144,410      5.94%
M&G SECURITIES LIMITED                6,548,108      5.45%

Proxy Voting:

10. Name of the proxy holder: N/A

11. Number of voting rights proxy holder will cease to hold: N/A

12. Date on which proxy holder will cease to hold voting rights: N/A

13. Additional information: NONE

14. Contact name: EMMA THOMPSON

15. Contact telephone number: 020 7548 2293



                      This information is provided by RNS
            The company news service from the London Stock Exchange

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