FORM 8.3

PUBLIC OPENING POSITION DISCLOSURE/DEALING DISCLOSURE BY

A PERSON WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE

Rule 8.3 of the Takeover Code (the 'Code')

1. KEY INFORMATION

(a) Full name of discloser:

Société Générale S.A.

(b) Owner or controller of interests and short positions disclosed, if different from 1(a):

The naming of nominee or vehicle companies is insufficient. For a trust, the trustee(s), settlor and beneficiaries must be named.

(c) Name of offeror/offeree in relation to whose relevant securities this form relates:

Use a separate form for each offeror/offeree

UBM Plc

(d) If an exempt fund manager connected with an offeror/offeree, state this and specify identity of offeror/offeree:

(e) Date position held/dealing undertaken:

For an opening position disclosure, state the latest practicable date prior to the disclosure

14/06/2018

(f) In addition to the company in 1(c) above, is the discloser making disclosures in respect of any other party to the offer?

If it is a cash offer or possible cash offer, state 'N/A'

YES: Informa Plc

2. POSITIONS OF THE PERSON MAKING THE DISCLOSURE

If there are positions or rights to subscribe to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2(a) or (b) (as appropriate) for each additional class of relevant security.

(a) Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates following the dealing (if any)

Class of relevant security:

Ordinary

Interests

Short positions

Number

%

Number

%

(1) Relevant securities owned and/or controlled:

12,362,865

3.13

18,250

0.00

(2) Cash-settled derivatives:

0

0.00

12,077,401

3.06

(3) Stock-settled derivatives (including options) and agreements to purchase/sell:

0

0.00

0

0.00

TOTAL:

12,362,865

3.13

12,095,651

3.06

All interests and all short positions should be disclosed.

Details of any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8 (Open Positions).

(b) Rights to subscribe for new securities (including directors' and other employee options)

Class of relevant security in relation to which subscription right exists:

Details, including nature of the rights concerned and relevant percentages:

3. DEALINGS (IF ANY) BY THE PERSON MAKING THE DISCLOSURE

Where there have been dealings in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 3(a), (b), (c) or (d) (as appropriate) for each additional class of relevant security dealt in.

The currency of all prices and other monetary amounts should be stated.

(a) Purchases and sales

Class of relevant security

Purchase/sale

Number of securities

Price per unit

GBP

Ordinary

Purchase

241

10.76

Ordinary

Purchase

252

10.76

Ordinary

Purchase

123

10.73

Ordinary

Purchase

472

10.73

Ordinary

Purchase

555

10.73

Ordinary

Purchase

561

10.73

Ordinary

Purchase

1,117

10.73

Ordinary

Purchase

185

10.75

Ordinary

Purchase

396

10.75

Ordinary

Purchase

207

10.73

Ordinary

Purchase

585

10.74

Ordinary

Purchase

183

10.75

Ordinary

Purchase

1,152

10.77

Ordinary

Purchase

407

10.73

Ordinary

Purchase

733

10.73

Ordinary

Purchase

995

10.72

Ordinary

Purchase

468

10.77

Ordinary

Purchase

534

10.76

Ordinary

Purchase

524

10.73

Ordinary

Purchase

1,097

10.79

Ordinary

Purchase

513

10.75

Ordinary

Purchase

923

10.74

Ordinary

Purchase

171

10.74

Ordinary

Purchase

413

10.74

Ordinary

Purchase

1,149

10.75

Ordinary

Purchase

822

10.75

Ordinary

Purchase

758

10.74

Ordinary

Purchase

239

10.73

Ordinary

Purchase

1,105

10.76

Ordinary

Purchase

669

10.74

Ordinary

Purchase

836

10.77

Ordinary

Purchase

545

10.71

Ordinary

Purchase

538

10.7

Ordinary

Purchase

409

10.72

Ordinary

Purchase

86

10.72

Ordinary

Purchase

681

10.74

Ordinary

Purchase

541

10.71

Ordinary

Purchase

1,149

10.76

Ordinary

Purchase

1,171

10.74

Ordinary

Purchase

379

10.77

Ordinary

Purchase

156

10.65

Ordinary

Purchase

86

10.65

Ordinary

Purchase

18

10.58

Ordinary

Purchase

8

10.57

Ordinary

Purchase

97

10.58

Ordinary

Purchase

108

10.57

Ordinary

Purchase

57

10.58

Ordinary

Purchase

180

10.58

Ordinary

Purchase

176

10.58

Ordinary

Purchase

97

10.58

Ordinary

Purchase

136

10.58

Ordinary

Purchase

97

10.58

Ordinary

Purchase

16,911

10.73840425

Ordinary

Purchase

307,000

10.80162

Ordinary

Purchase

2,135,878

10.796695

Ordinary

Purchase

40,000

10.8027

Ordinary

Purchase

100,000

10.8027

Ordinary

Purchase

87,141

10.605292

Ordinary

Purchase

1,501

10.5399

Ordinary

Purchase

61,791

10.566506

Ordinary

Sale

2,341

10.8

Ordinary

Sale

78,107

10.8

Ordinary

Sale

4,015

10.8

Ordinary

Sale

2,919

10.8

Ordinary

Sale

423

10.6

Ordinary

Sale

155

10.8

Ordinary

Sale

60

10.8

Ordinary

Sale

1,217

10.57

Ordinary

Sale

15,885

10.8

Ordinary

Sale

2,482

10.8

Ordinary

Sale

708

10.6

Ordinary

Sale

960

10.59

Ordinary

Sale

957

10.6

Ordinary

Sale

500

10.59

Ordinary

Sale

585

10.54

Ordinary

Sale

574

10.56

Ordinary

Sale

26

10.56

Ordinary

Sale

418

10.55

Ordinary

Sale

66

10.5

Ordinary

Sale

1,244

10.56

Ordinary

Sale

1,212

10.58

Ordinary

Sale

1,130

10.58

Ordinary

Sale

70,349

10.8

Ordinary

Sale

13,290

10.669637

Ordinary

Sale

13,328

10.67086

Ordinary

Sale

1,501

10.67

Ordinary

Sale

61,791

10.68176

Total Purchases

2,775,322

Total Sales

276,243

(b) Cash-settled derivative transactions

Class of relevant security

Product description

e.g. CFD

Nature of dealing

e.g. opening/closing a long/short position, increasing/reducing a long/short position

Number of reference securities

Price per unit GBP

Ordinary

CFD

Increasing a short position

16,911

10.73840425

Ordinary

CFD

Increasing a short position

307,000

10.80162

Ordinary

CFD

Increasing a short position

2,135,878

10.796695

Ordinary

CFD

Increasing a short position

40,000

10.8027

Ordinary

CFD

Increasing a short position

100,000

10.8027

Ordinary

CFD

Increasing a short position

87,141

10.605292

Ordinary

CFD

Reducing a short position

13,290

10.669637

Ordinary

CFD

Reducing a short position

13,328

10.67086

(c) Stock-settled derivative transactions (including options)

(i) Writing, selling, purchasing or varying

Class of relevant security

Product description e.g. call option

Writing, purchasing, selling, varying etc.

Number of securities to which option relates

Exercise price per unit

Type

e.g. American, European etc.

Expiry date

Option money paid/ received per unit GBP

(ii) Exercise

Class of relevant security

Product description

e.g. call option

Exercising/ exercised against

Number of securities

Exercise price per unit GBP

(d) Other dealings (including subscribing for new securities)

Class of relevant security

Nature of dealing

e.g. subscription, conversion

Details

Price per unit (if applicable) GBP

4. OTHER INFORMATION

(a) Indemnity and other dealing arrangements

Details of any indemnity or option arrangement, or any agreement or understanding, formal or informal, relating to relevant securities which may be an inducement to deal or refrain from dealing entered into by the person making the disclosure and any party to the offer or any person acting in concert with a party to the offer:

Irrevocable commitments and letters of intent should not be included. If there are no such agreements, arrangements or understandings, state 'none'

(b) Agreements, arrangements or understandings relating to options or derivatives

Details of any agreement, arrangement or understanding, formal or informal, between the person making the disclosure and any other person relating to:

(i) the voting rights of any relevant securities under any option; or

(ii) the voting rights or future acquisition or disposal of any relevant securities to which any derivative is referenced:

If there are no such agreements, arrangements or understandings, state 'none'

(c) Attachments

Is a Supplemental Form 8 (Open Positions) attached?

NO

Date of disclosure:

15/06/2018

Contact name:

Olivier Vero

Telephone number:

+44 20 7676 6969

Public disclosures under Rule 8 of the Code must be made to a Regulatory Information Service.

The Panel's Market Surveillance Unit is available for consultation in relation to the Code's disclosure requirements on +44 (0)20 7638 0129.The Code can be viewed on the Panel's website atwww.thetakeoverpanel.org.uk.

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UBM plc published this content on 15 June 2018 and is solely responsible for the information contained herein. Distributed by Public, unedited and unaltered, on 15 June 2018 10:07:02 UTC