TR1: Notification of Major Holdings

NOTIFICATION OF MAJOR HOLDINGS (to be sent to the relevant issuer and to the FCA in Microsoft Word format if possible)i

1a. Identity of the issuer or the underlying issuer of existing shares to which voting rights are at- tachedii:

Entain PLC

1b. Please indicate if the issuer is a non-UK issuer(please mark with an "X" if appropriate)

Non-UK issuer

X

2. Reason for the notification(please mark the appropriate box or boxes with an "X")

An acquisition or disposal of voting rights

X

An acquisition or disposal of financial instruments

An event changing the breakdown of voting rights

Other (please specify)iii:

3. Details of person subject to the notification obligationiv

Name

Corvex Management LP

City and country of registered office (if applicable)

New York, USA

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

Name

City and country of registered office (if applicable)

5. Date on which the threshold was crossed or reachedvi:

11 February 2025

6. Date on which issuer notified (DD/MM/YYYY):

13 February 2025

7. Total positions of person(s) subject to the notification obligation

% of voting rights at- tached to shares (to- tal of 8. A)

% of voting rights through financial instru- ments

(total of 8.B 1 + 8.B 2)

Total of both in % (8.A + 8.B)

Total number of voting rights of is- suervii

Resulting situation on the date on which

threshold was crossed or reached

2.9366%

2.3883%

5.3249%

34,042,774

Position of previous notification (if applicable)

N/A

N/A

N/A

8. Notified details of the resulting situation on the date on which the threshold was crossed or reachedviii

A: Voting rights attached to shares

Class/type of shares

ISIN code (if possible)

Number of voting rightsix

% of voting rights

Direct

(Art 9 of Directive 2004/109/EC) (DTR5.1)

Indirect

(Art 10 of Directive 2004/109/EC) (DTR5.2.1)

Direct

(Art 9 of Directive 2004/109/EC) (DTR5.1)

Indirect

(Art 10 of Directive 2004/109/EC) (DTR5.2.1)

Ordinary Shares ISIN:

IM00B5VQMV65

Nil

18,774,142

Nil

2.9366%

SUBTOTAL 8. A

18,774,142

2.9366%

B 1: Financial Instruments according to Art. 13(1)(a) of Directive 2004/109/EC (DTR5.3.1.1 (a))

Type of financial in- strument

Expiration datex

Exercise/ Conversion Periodxi

Number of voting rights that may be acquired if the instrument is exercised/converted.

% of voting rights

SUBTOTAL 8. B 1

B 2: Financial Instruments with similar economic effect according to Art. 13(1)(b) of Directive 2004/109/EC (DTR5.3.1.1 (b))

Type of financial instrument

Expiration datex

Exercise/ Conversion Pe- riod xi

Physical or cash settlementxii

Number of voting rights

% of voting rights

CFD

Cash

15,268,632

2.3883%

SUBTOTAL 8.B.2

15,268,632

2.3883%

Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuerxiii

Full chain of controlled undertakings through which the voting rights and/or the

financial instruments are effectively held starting with the ultimate controlling natural person or legal entityxiv

(please add additional rows as necessary)

X

Namexv

% of voting rights if it equals or is higher than the notifiable threshold

% of voting rights through financial in- struments if it equals or is higher than the

notifiable threshold

Total of both if it equals or is higher than the notifiable threshold

Corvex Management LP

10. In case of proxy voting, please identify:

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

11. Additional informationxvi

Corvex Management LP ("Corvex Management") is a US Securities and Exchange Commission regis- tered investment adviser that serves as investment adviser to private investment funds.

Corvex Management, pursuant to investment adviser agreements, has voting and investment power over investments held by funds advised by Corvex Management.

Corvex Management does not directly own the positions subject to this notification obligation, which are held by funds advised by Corvex Management, but as noted above, does have voting and investment power over such positions.

No individual fund holds interests in securities totalling more than 5% of the voting rights in the Issuer.

Place of completion

New York, USA

Date of completion

13 February 2025