TR-1 Notification of Major Interest in Shares

For filings with the FSA include the annex

 For filings with issuer exclude the annex


+-------------------------------------------------+
| TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi |
+-------------------------------------------------+

+----------------------------------------------------------------+-------------+
|1. Identity of the issuer or the underlying issuer of existing  |API Group Plc|
|shares to which voting rights are attached: ii                  |             |
+----------------------------------------------------------------+-------------+

+---------------------------------------------------------------------------+
| 2 Reason for the notification (please tick the appropriate box or boxes): |
+---------------------------------------------------------------------------+

+--------------------------------------------------------------------------+---+
|An acquisition or disposal of voting rights                               |Yes|
+--------------------------------------------------------------------------+---+
|An acquisition or disposal of qualifying financial instruments which may  |   |
|result in the acquisition of shares already issued to which voting rights |No |
|are attached                                                              |   |
+--------------------------------------------------------------------------+---+
|An acquisition or disposal of instruments with similar economic effect to |No |
|qualifying financial instruments                                          |   |
+--------------------------------------------------------------------------+---+
|An event changing the breakdown of voting rights                          |No |
+--------------------------------------------------------------------------+---+
|Other (please specify):                                                   |No |
+--------------------------------------------------------------------------+---+

+----------------------------------------+-------------------------------------+
|                                        |                                     |
|3. Full name of person(s) subject to the|Wynnefield Capital Inc as umbrella   |
|notification obligation: iii            |general manager for four separate    |
|                                        |funds                                |
+----------------------------------------+-------------------------------------+
|                                        |                                     |
|4. Full name of shareholder(s)  (if     |Wynnefield Partners Small Cap Value  |
|different from 3.):iv                   |LP1                                  |
|                                        |Wynnefield Partners Small Cap Value  |
|                                        |LP                                   |
|                                        |Wynnefield Small Cap Value Offshore  |
|                                        |Fund Ltd                             |
|                                        |Channel Partnership II LLP           |
+----------------------------------------+-------------------------------------+
|5. Date of the transaction and date on  |28 January 2011                      |
|which the threshold is crossed or       |                                     |
|reached: v                              |                                     |
+----------------------------------------+-------------------------------------+
|6. Date on which issuer notified:       |31 January 2011                      |
+----------------------------------------+-------------------------------------+
|7. Threshold(s) that is/are crossed or  |From 28.83% to 29.77%                |
|reached: vi, vii                        |                                     |
+----------------------------------------+-------------------------------------+

8. Notified details:
A: Voting rights attached to shares viii, ix

+-----------+---------------------+--------------------------------------------+
|Class/type | Situation previous  |         Resulting situation after          |
|of         |  to the triggering  |               the triggering               |
|shares     |     transaction     |                transaction                 |
|           +----------+----------+--------+-------------------+---------------+
|if possible|  Number  |  Number  | Number |     Number of     | % of  voting  |
|using      |    of    |    of    |   of   |      voting       |   rights x    |
|the ISIN   |  Shares  |  Voting  | shares |      rights       |               |
|CODE       |          |  Rights  |        |                   |               |
+-----------+----------+----------+--------+-------+-----------+------+--------+
|           |          |          | Direct |Direct | Indirect  |Direct|Indirect|
|           |          |          |        |  xi   |    xii    |      |        |
+-----------+----------+----------+--------+-------+-----------+------+--------+
|Ordinary   |22,090,474|22,090,474|725,000 |       |22,815,474 |      | 29.77% |
+-----------+----------+----------+--------+-------+-----------+------+--------+

+------------------------------------------------------------------------------+
|B: Qualifying Financial Instruments                                           |
+------------------------------------------------------------------------------+
|Resulting situation after the triggering transaction                          |
+------------+----------+-------------------+-------------------+--------------+
|  Type of   |Expiration|     Exercise/     | Number of voting  | % of voting  |
| financial  |date xiii | Conversion Period |rights that may be |    rights    |
| instrument |          |        xiv        |  acquired if the  |              |
|            |          |                   |   instrument is   |              |
|            |          |                   |    exercised/     |              |
|            |          |                   |    converted.     |              |
+------------+----------+-------------------+-------------------+--------------+
|            |          |                   |                   |              |
+------------+----------+-------------------+-------------------+--------------+

+------------------------------------------------------------------------------+
|C: Financial Instruments with similar economic effect to Qualifying Financial |
|Instruments xv, xvi                                                           |
+------------------------------------------------------------------------------+
|Resulting situation after the triggering transaction                          |
+--------------+--------+----------+------------+-------------+----------------+
|   Type of    |Exercise|Expiration| Exercise/  |  Number of  |  % of voting   |
|  financial   | price  |date xvii | Conversion |   voting    | rights xix, xx |
|  instrument  |        |          |period xviii|   rights    |                |
|              |        |          |            | instrument  |                |
|              |        |          |            |  refers to  |                |
|              |        |          |            |             |                |
+--------------+--------+----------+------------+-------------+-------+--------+
|              |        |          |            |             |Nominal| Delta  |
+--------------+--------+----------+------------+-------------+-------+--------+
|              |        |          |            |             |       |        |
+--------------+--------+----------+------------+-------------+-------+--------+

+-------------------------------------------------------+
| Total (A+B+C)                                         |
+-------------------------+-----------------------------+
| Number of voting rights | Percentage of voting rights |
+-------------------------+-----------------------------+
|       22,815,474        |           29.77%            |
+-------------------------+-----------------------------+

+------------------------------------------------------------------------------+
|9. Chain of controlled undertakings through which the voting rights and/or the|
|financial instruments are effectively held, if applicable: xxi                |
+------------------------------------------------------------------------------+
|                                                                              |
|The shares are registered in the name of Jefferies International (Nominees)   |
|Limited - SAFEC account on behalf of Wynnefield Capital Inc                   |


+------------------------------------------------------------------------+
| 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:   | n/a               |
+-------------------------------+-------------------+
| 14. Contact name:             | Stephen Zelkowicz |
+-------------------------------+-------------------+
| 15. Contact telephone number: | 001 212-760-0278  |
+-------------------------------+-------------------+







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Source: API Group PLC via Thomson Reuters ONE

[HUG#1483834]