Form 8.3 STHREE PLC

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:

Barclays PLC.

(b)

Owner or controller of interest and short

positions disclosed, if different from 1(a):

(c)

Name of offeror/offeree in relation to whose

STHREE PLC

relevant securities this form relates:

(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:

14 Oct 2026

(f)

In addition to the company in 1(c) above, is the discloser making

NO

disclosures in respect of any other party to the offer?

2.

POSITIONS OF THE PERSON MAKING THE DISCLOSURE

(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:

1p Ordinary

Interests

Short Positions

Number

(%)

Number

(%)

(1)

Relevant securities owned

and/or controlled:

3,814,080

3.14%

458,068

0.38%

(2)

Cash-settled derivatives:

448,441

0.37%

3,815,307

3.14%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

4,262,521

3.50%

4,273,375

3.51%

(b)

Rights to subscribe for new securities (including directors and other executive

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

(a)

Purchases and sales

Class of relevant

Purchase/sale

Number of

Price per unit

security

securities

1p Ordinary

Purchase

8,154

3.1542 GBP

1p Ordinary

Purchase

3,458

3.1500 GBP

1p Ordinary

Purchase

2,924

3.1650 GBP

1p Ordinary

Purchase

2,188

3.1550 GBP

1p Ordinary

Purchase

1,796

3.1013 GBP

1p Ordinary

Purchase

1,362

3.1564 GBP

1p Ordinary

Purchase

1,269

3.1599 GBP

1p Ordinary

Purchase

1,207

3.1501 GBP

1p Ordinary

Purchase

956

3.1589 GBP

1p Ordinary

Purchase

574

3.1560 GBP

1p Ordinary

Purchase

489

3.1647 GBP

1p Ordinary

Purchase

138

3.1435 GBP

1p Ordinary

Purchase

137

3.1675 GBP

1p Ordinary

Purchase

84

3.1100 GBP

1p Ordinary

Purchase

80

3.1561 GBP

1p Ordinary

Purchase

43

3.1025 GBP

1p Ordinary

Purchase

41

3.0450 GBP

1p Ordinary

Purchase

30

3.1050 GBP

1p Ordinary

Purchase

21

3.1643 GBP

1p Ordinary

Sale

8,403

3.1412 GBP

1p Ordinary

Sale

3,073

3.1549 GBP

1p Ordinary

Sale

1,965

3.1650 GBP

1p Ordinary

Sale

1,602

3.1191 GBP

1p Ordinary

Sale

1,273

3.1401 GBP

1p Ordinary

Sale

1,266

3.1631 GBP

1p Ordinary

Sale

922

3.1424 GBP

1p Ordinary

Sale

721

3.1415 GBP

1p Ordinary

Sale

432

2.9699 GBP

1p Ordinary

Sale

251

3.1500 GBP

1p Ordinary

Sale

137

3.1675 GBP

1p Ordinary

Sale

81

3.1550 GBP

1p Ordinary

Sale

80

3.1561 GBP

1p Ordinary

Sale

43

3.1025 GBP

1p Ordinary

Sale

41

3.0450 GBP

(b)

Cash-settled derivative transactions

Class of

Product

Nature of dealing

Number of

Price per

relevant

description

reference

unit

security

securities

1p Ordinary

SWAP

Increasing Long

8,403

3.1412 GBP

1p Ordinary

SWAP

Decreasing Short

241

3.1597 GBP

1p Ordinary

SWAP

Decreasing Short

243

3.1371 GBP

1p Ordinary

SWAP

Decreasing Short

1,638

3.1419 GBP

1p Ordinary

SWAP

Increasing Short

3,132

3.1569 GBP

1p Ordinary

SWAP

Decreasing Long

16

3.1500 GBP

1p Ordinary

SWAP

Increasing Short

2,179

3.1553 GBP

1p Ordinary

CFD

Decreasing Long

96

2.9702 GBP

1p Ordinary

CFD

Increasing Short

912

3.1183 GBP

1p Ordinary

SWAP

Opening Long

432

2.9699 GBP

1p Ordinary

SWAP

Decreasing Long

1,269

3.1599 GBP

1p Ordinary

SWAP

Opening Short

512

3.1050 GBP

1p Ordinary

SWAP

Decreasing Long

1,796

3.1013 GBP

1p Ordinary

SWAP

Increasing Short

97

3.1038 GBP

1p Ordinary

SWAP

Decreasing Long

1,139

3.1650 GBP

1p Ordinary

SWAP

Increasing Short

1,758

3.1650 GBP

1p Ordinary

SWAP

Decreasing Short

1,266

3.1631 GBP

1p Ordinary

SWAP

Decreasing Long

819

3.1650 GBP

1p Ordinary

SWAP

Increasing Short

1,362

3.1563 GBP

1p Ordinary

SWAP

Increasing Short

438

3.1550 GBP

1p Ordinary

SWAP

Decreasing Long

610

3.1650 GBP

(c)

Stock-settled derivative transactions (including options)

(i)

Writing, selling, purchasing or varying

Class

Product

Writing,

Number

Exercise

Type

Expiry

Option

of

description

purchasing,

of

price

date

money

relevant

selling,

securities

per unit

paid/

security

varying etc

to which

received

option

per unit

relates

(ii)

Exercise

Class of relevant

Product description

Exercising/ exercised against

Number of

Exercise price per

security

securities

unit

(d)

Other dealings (including subscribing for new securities)

Class of relevant

Nature of Dealings

Details

Price per unit (if

security

applicable)

4.

OTHER INFORMATION

(a)

Indemnity and other dealings 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 exempt principal trader making the disclosure and any party

to the offer or any person acting in concert with a party to the offer:

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 of future acquisition or disposal of any relevant securities to which

any derivative is referenced:

NONE

(c)

Attachments

Is a Supplemental Form 8 (Open Positions) attached?

NO

Date of disclosure:

15 Oct 2026

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213