Holding(s) in Company

Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights areof existing shares to which voting rights are attached:attached: ii			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				No
An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments				No
An event changing the breakdown of voting rights				No
Other (please specify):
3. Full name of person(s) subject to the notification obligation:notification obligation: iii		FMR LLC
4. Full name of shareholder(s) (if different from 3.):iv		See below
5. Date of the transaction and date on which the threshold is crossed orwhich the threshold is crossed or reached:reached: v		30 JUNE 2010
6. Date on which issuer notified:		2 JULY 2010
7. Threshold(s) that is/are crossed or reached:reached: vi, vii		10%

8. Notified details:
A: Voting rights attached to shares viii, ix
Class/type of sharesshares	Situation previous to the triggeringto the triggering transactiontransaction
if possible using the ISIN CODEthe ISIN CODE	Number ofof SharesShares	Number ofof VotingVoting RightsRights
JE00B3WJHK45	60,932,499	60,932,499

Resulting situation after the triggering transaction
Number of sharesof shares	Number of voting rightsrights		% of voting rights x
Direct	Direct xi	Indirect xii	Direct	Indirect
59,474,297		59,474,297		9.90%

B: Qualifying Financial Instruments
Resulting situation after the triggering transaction
Type of financial instrumentinstrument	Expiration datedate xiii	Exercise/ Conversion PeriodConversion Period xiv	Number of voting rights that may berights that may be acquired if theacquired if the instrument isinstrument is exercised/ converted.exercised/ converted.	% of voting rightsrights

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

Total (A+B+C)
Number of voting rights	Percentage of voting rights
59,474,297	9.90%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:financial instruments are effectively held, if applicable: xxi
FMR LLC is the parent holding company of	829,625		BROWN BROTHERS HARRIMAN AND CO	FMRCO
Fidelity	39,722		BROWN BROTHERS HARRIMAN AND CO	FMRCO
Management & Research Company	1,712,482		CITIBANK NA	FMRCO
(FMRCO), Investinoni	660,280		MELLON BANK NA (C)	PTC
Manager for US mutual funds, and FIL Management Trust	3,541,434		NORTHERN TRUST CO	FRMRC
Company (FMTC) and Pyramis Global Advisors Trust Company	11,420,126		STATE STREET BANK AND TR CO	PTC
(PGATC), a US states chartered bank which acts as a trustee	36,847,941		JP MORGAN CHASE BANK	FMRCO
or investment manager of various pension and trust accounts	579,361		CIBC MELLON TRUST (C)	FCL
and Pyramis Global Advisors LLC (PGALLC)	107,856		CIBC MELLON TRUST (C)	FCL
	3,735,469		NORTHERN TRUST CO	FMRCO
	1

Proxy Voting:
10. Name of the proxy holder:	FMR LLC
11. Number of voting rights proxy holder will cease to hold:to hold:	1,458,202
12. Date on which proxy holder will cease to hold voting rights:voting rights:	30 JUNE 2010
13. Additional information:
14. Contact name:		SHAHEEN HUSSAIN
15. Contact telephone number:		[e-mail]

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 Wilson 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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