Holding(s) in Company

Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

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

Informa Plc

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 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 the notification obligation:

AXA S.A. and its group of companies

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

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

26 May 2011

6. Date on which issuer notified:

27 May 2011

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

5%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares	Situation previous to the triggering transaction		Resulting situation after the triggering transaction
if possible using the ISIN CODE	Number Of Shares	Number Of Voting Rights	Number of shares	Number of voting rights		% of voting rights
				Direct	Indirect	Direct	Indirect
B3WJHK4	30,159,327	30,159,327	874,950	874,950	29,175,877	0.15	4.85

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

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments
Resulting situation after the triggering transaction
Type of financial instrument	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
30,050,827	5.00%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:
Name of Company/Fund	Number of Shares	% of issued share capital
Alliance Capital Management Indirect	21,793,177.00	3.620478
AXA Direct	814,950.00	0.135573
AXA IM UK Direct	60,000.00	0.009981
AXA IM UK Indirect	7,412,700.00	1.233162
Total Direct Total Indirect	874,950 29,175,877	0.14555 4.85364
TOTAL	30,050,827	4.99919

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:
14. Contact name:	Charles Tissier
15. Contact telephone number:	020 7003 2823

Annex: Notification of major interests in shares

A: Identity of the persons or legal entity subject to the notification obligation
Full name (including legal form of legal entities)	INFORMA PLC
Contact address (registered office for legal entities)	22 Grenville Street, St Helier, Jersey JE4 8PX
Phone number & email	020 7017 4314 [e-mail]
Other useful information (at least legal representative for legal persons)	Julie Woollard Deputy Company Secretary

B: Identity of the notifier, if applicable
Full name
Contact address
Phone number & email
Other useful information (e.g. functional relationship with the person or legal entity subject to the notification obligation)

C: Additional information

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Provider		Channel		Contact
Tensid Ltd., Switzerland www.tensid.ch		newsbox.ch www.newsbox.ch		Provider/Channel related enquiries [e-mail] [phone]