Director/PDMR Shareholding

Glanbia PLC
13 September 2005


                                  GLANBIA plc


NOTIFICATION OF TRANSACTIONS OF DIRECTORS, PERSONS DISCHARGING MANAGERIAL
RESPONSIBILITY OR CONNECTED PERSONS

This form is intended for use by an issuer to make a RIS notification required
by DR 3.1.4R(1).

(1)     An issuer making a notification in respect of a transaction relating to
the shares or debentures of the issuer should complete boxes 1 to 16, 23 and 24.
(2)     An issuer making a notification in respect of a derivative relating to
the shares of the issuer should complete boxes 1 to 4, 6, 8, 13, 14, 16, 23 and
24.
(3)     An issuer making a notification in respect of options granted to a
director/person discharging managerial responsibilities of the issuer should
complete boxes 1 to 3 and 17 to 24.
(4)     An issuer making a notification in respect of a financial instrument
relating to the shares of the issuer (other than a debenture) should complete
boxes 1 to 4, 6, 8, 9, 11, 13, 14, 16, 23 and 24.

Please complete all relevant boxes in block capital letters.

 1.  Name of the issuer                   2.  State whether the notification
                                              relates to (i) a transaction
                                              notified in accordance with DR
                                              3.1.4R(1)(a); or
     GLANBIA plc                              (ii) DR 3.1.4(R)(1)(b) a
                                              disclosure made in accordance with
                                              Section 53 of the Companies Act,
                                              1990 (as amended); or
                                              (iii) both (i) and (ii)

                                              (iii)

 3.  Name of person discharging           4.  State whether notification relates
     managerial responsibilities/             to a person connected with a
     director                                 person discharging managerial
                                              responsibilities/director named in
                                              3 and identify the connected
                                              person
     WILLIAM G. MURPHY, DIRECTOR              NOT APPLICABLE

 5.  Indicate whether the notification    6.  Description of shares (including
     is in respect of a holding of the        class), debentures or derivatives
     person referred to in 3 or 4 above       or financial instruments relating
     or in respect of a non-beneficial        to shares
     interest
     NOTIFICATION IS IN RESPECT OF THE        ORDINARY SHARES OF €0.06 EACH
     EXERCISE OF AN OPTION BY WILLIAM G.
     MURPHY PURSUANT TO THE GLANBIA plc
     2002 LONG TERM INCENTIVE PLAN
 7.  Name of registered shareholder(s)    8.  State the nature of the
     and, if more than one, the number        transaction
     of shares held by each of them
     DAVYCREST NOMINEES LIMITED <0104550>     EXERCISE OF OPTION ENTITLEMENT
                                              PURSUANT TO THE GLANBIA plc 2002
                                              LONG TERM INCENTIVE PLAN
 9.  Number of shares or financial       10.  Percentage of issued class
     instruments relating to shares           acquired (treasury shares of that
     acquired                                 class should not be taken into
                                              account when calculating
                                              percentage)
                               225,500        NOT MATERIAL, LESS THAN 1%
11.  Number of shares or financial       12.  Percentage of issued class
     instruments relating to shares           disposed (treasury shares of that
     disposed                                 class should not be taken into
                                              account when calculating
                                              percentage)

     NOT APPLICABLE                           NOT APPLICABLE

13.  Price per share or value of         14.  Date and place of transaction
     transaction
     €1.55 PER SHARE                          8 SEPTEMBER, 2005
                                              GLANBIA plc, GLANBIA HOUSE,
                                              KILKENNY
15.  Total holding following             15.  Date issuer informed of
     notification and total percentage        transaction
     holding following notification (any
     treasury shares should not be taken
     into account when calculating
     percentage)
     TOTAL HOLDING/INTERESTS                  13 SEPTEMBER 2005

     FOLLOWING NOTIFICATION:

     456,327 ORDINARY SHARES OF €0.06
     EACH
     75,000 OPTIONS UNDER GLANBIA plc
     1988 SHARE OPTION SCHEME, AT AN
     EXERCISE OF €4.25 PER SHARE
     PERCENTAGE HOLDING:

     NOT MATERIAL, LESS THAN 1%




If a person discharging managerial responsibilities has been granted options by
the issuer complete the following boxes

17.  Date of grant                          18.  Period during which or date on
                                                 which it can be exercised
19.  Total amount paid (if any) for the     20.  Description of shares or
     grant of the option                         debentures involved (class and
                                                 number)
21.  Exercise price (if fixed at time of    22.  Total number of shares or
     grant) or indication that price is to       debentures over which options
     be fixed at the time of the exercise        held following notification
23.  Any additional information             24.  Name of contact and telephone
                                                 number for queries
                                                 JOHN ROCHE
                                                 + 353 56 7772212



Name and signature of duly authorised officer of issuer responsible for making
notification
MICHAEL HORAN
Date of Notification: 13 September, 2005





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