Holding(s) in Company

06 April 2010

IQE plc
("IQE" or the "Company")





+----------------------------------------------------------+
| TR-1:         Notifications of Major Interests in Shares |
+----------------------------------------------------------+

+----------------------------------------------------------------------+-------+
|1:     Identity of the issuer or the underlying issuer of existing    |IQE PLC|
|shares to which voting rights are attached:                           |       |
+----------------------------------------------------------------------+-------+

+------------------------------------------------------------------------------+
|2:    Reason for notification (yes/no)                                        |
+--------------------------------------------------------------------------+---+
|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                          |yes|
+-----------------------+--------------------------------------------------+---+
|Other (please specify):|                                                  |no |
+-----------------------+--------------------------------------------------+---+

+-----------------------------------------------+------------------------------+
|3. Full name of person(s) subject to the       |                              |
|notification                                   | Standard Life Investments Ltd|
|    obligation:                                |                              |
+-----------------------------------------------+------------------------------+
|4. Full name of shareholder(s) (if different   | Vidacos Nominees             |
|from 3.):                                      |                              |
+-----------------------------------------------+------------------------------+
|5. Date of the transaction (and date on which  |                              |
|the threshold                                  |05 April 2011                 |
|      is crossed or reached):                  |                              |
+-----------------------------------------------+------------------------------+
|6. Date on which issuer notified:              |06 April 2011                 |
+-----------------------------------------------+------------------------------+
|7. Threshold(s) that is/are crossed or reached:|6%                            |
+-----------------------------------------------+------------------------------+












+------------------------------------------------------------------------+
|8:    Notified Details                                                  |
+------------------------------------------------------------------------+
|A:    Voting rights attached to shares                                  |
+---------------------------------------------+--------------------------+
|Class/type of share   If possible use ISIN   |GB0009619924              |
|code                                         |                          |
+---------------------------------------------+--------------------------+
|                                                                        |
+------------------------------------------------------------------------+
|Situation previous to the triggering transaction                        |
+---------------------------------------------+--------------------------+
|Number of shares                             |Number of voting rights   |
+---------------------------------------------+--------------------------+
|30,279,325                                   |30,279,325                |
+---------------------------------------------+--------------------------+
|                                                                        |
+------------------------------------------------------------------------+
|Resulting situation after the triggering transaction                    |
+----------------+---------------------------------------+---------------+
|Number of shares|Number of voting rights                |Percentage of  |
|                |                                       |voting rights  |
|                +----------------------------+----------+------+--------+
|                |Direct                      |Indirect  |Direct|Indirect|
+----------------+----------------------------+----------+------+--------+
|32,644,062      |3,564,737                   |29,079,325|0.691%|5.635%  |
+----------------+----------------------------+----------+------+--------+

+------------------------------------------------------------------------------+
|B:    Qualifying Financial Instruments                                        |
+------------------------------------------------------------------------------+
|Resulting situation after the triggering transaction                          |
+-------------+-------------+--------------+----------------------+------------+
|Type of      |Expiration   |Exercise/     |No. of voting rights  |Percentage  |
|financial    |date         |conversion    |that may be acquired  |of voting   |
|instrument   |             |period/date   |(if the instrument    |rights      |
|             |             |              |exercised/converted)  |            |
+-------------+-------------+--------------+----------------------+------------+
|             |             |              |                      |            |
+-------------+-------------+--------------+----------------------+------------+

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

+-------------------------------------------------------+
| Total (A+B+C)                                         |
+-------------------------+-----------------------------+
| Number of voting rights | Percentage of voting rights |
+-------------------------+-----------------------------+
| 32,644,062              | 6.325%                      |
+-------------------------+-----------------------------+







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Source: IQE plc via Thomson Reuters ONE

[HUG#1504125]