Holding(s) in Company

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached:

QinetiQ Group plc

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

An acquisition or disposal of voting rights

X

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

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

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

Artisan Partners Holdings LP, Artisan Partners Limited Partnership, Artisan Partners Asset Management, Inc., Artisan Investments GP LLC, Artisan Investment Corporation, ZFIC, Inc., Andrew A. Ziegler, Carlene M. Ziegler

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

State Street, Bank of New York, Mellon Bank, Northern Trust, JP Morgan Chase, Pictet & Cie

5. Date of the transaction and date onwhich the threshold is crossed orreached:

April 12, 2013

6. Date on which issuer notified:

April 15, 2013

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

Below 14%

8. Notified details:

A: Voting rights attached to shares

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights

Direct

Direct

Indirect

Direct

Indirect

GB00B0WMWD03

92,468,520

92,468,520

92,196,069

13.96%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate

Exercise/Conversion Period

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date

Exercise/Conversion period

Number of voting rights instrument refers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

92,196,069

13.96%

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

Artisan Partners Limited Partnership ("APLP"), a U.S. registered investment adviser, is a limited partnership organized under the laws of the State of Delaware on March 26, 2009. Control of APLP is vested in its general partner, Artisan Investments GP LLC, a limited liability company organized under the laws of the State of Delaware on March 26, 2009. Artisan Partners Holdings LP is the sole member of

Artisan Investments GP LLC, and is the sole limited partner of Artisan Partners Limited Partnership.

Control of Artisan Partners Holdings LP (formerly named Artisan Partners Limited Partnership) is vested in its general partner, Artisan Partners Asset Management Inc. ("APAM"), a Delaware corporation. Pursuant to a Stockholders' Agreement dated March 12, 2013, entered into between certain shareholders of APAM,

control of APAM is vested in Artisan Investment Corporation, a corporation organized under the laws of the

State of Wisconsin. All of the outstanding stock of Artisan Investment Corporation is owned by ZFIC, Inc., a corporation organized under the laws of the State of Wisconsin. Andrew A. Ziegler and Carlene M.

Ziegler each own 50% of the voting stock of ZFIC, Inc. APLP, pursuant to advisory contracts, has the power to purchase and sell securities on behalf of its clients and the power to vote for most clients.

Persons other than APLP are entitled to receive all dividends from, and proceeds from the sale of, all of the securities reported hereunder.

Artisan International Value Fund ("ARTIV"), is a series of Artisan Partners Funds Inc., a U.S. registered investment company. Certain officers and a director of Artisan Partners Funds, Inc. are employees of

APLP. APLP pursuant to its advisory contract with ARTIV has the power to purchase and sell securities on behalf of ARTIV and to vote for ARTIV. ARTIV, as of April 12, 2013, was interested in 64,575,079 shares, representing 9.78% of the 13.96% disclosed above, of QinetiQ Group plc.

Proxy Voting:

10. Name of the proxy holder:

Artisan Partners Limited Partnership

11. Number of voting rights proxy holder will ceaseto hold:

N/A

12. Date on which proxy holder will cease to holdvoting rights:

N/A

13. Additional information:

14. Contact name:

Jon Messent

15. Contact telephone number:

01252 392000