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:

09 Sep 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:

4,096,952

3.36%

759,010

0.62%

(2)

Cash-settled derivatives:

759,010

0.62%

4,097,158

3.36%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

4,855,962

3.98%

4,856,168

3.98%

(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

267,244

3.0350 GBP

1p Ordinary

Purchase

40,135

2.8901 GBP

1p Ordinary

Purchase

16,956

2.9826 GBP

1p Ordinary

Purchase

11,948

2.8116 GBP

1p Ordinary

Purchase

11,654

2.9084 GBP

1p Ordinary

Purchase

10,032

2.9475 GBP

1p Ordinary

Purchase

7,177

3.0023 GBP

1p Ordinary

Purchase

4,299

3.0351 GBP

1p Ordinary

Purchase

4,148

2.9022 GBP

1p Ordinary

Purchase

3,770

2.9013 GBP

1p Ordinary

Purchase

3,637

2.9349 GBP

1p Ordinary

Purchase

3,108

2.8947 GBP

1p Ordinary

Purchase

3,053

2.8950 GBP

1p Ordinary

Purchase

2,957

2.8126 GBP

1p Ordinary

Purchase

2,846

2.8998 GBP

1p Ordinary

Purchase

2,795

2.9321 GBP

1p Ordinary

Purchase

2,042

3.0347 GBP

1p Ordinary

Purchase

1,779

3.0822 GBP

1p Ordinary

Purchase

1,714

2.8956 GBP

1p Ordinary

Purchase

1,150

2.9133 GBP

1p Ordinary

Purchase

1,090

2.9453 GBP

1p Ordinary

Purchase

979

2.8600 GBP

1p Ordinary

Purchase

813

2.8878 GBP

1p Ordinary

Purchase

813

2.8877 GBP

1p Ordinary

Purchase

658

3.0401 GBP

1p Ordinary

Purchase

458

2.8550 GBP

1p Ordinary

Purchase

203

2.8900 GBP

1p Ordinary

Sale

46,317

3.0362 GBP

1p Ordinary

Sale

31,596

2.9482 GBP

1p Ordinary

Sale

28,866

2.8787 GBP

1p Ordinary

Sale

15,000

3.0650 GBP

1p Ordinary

Sale

9,825

3.0350 GBP

1p Ordinary

Sale

6,131

3.0695 GBP

1p Ordinary

Sale

5,033

2.9594 GBP

1p Ordinary

Sale

3,647

2.8304 GBP

1p Ordinary

Sale

2,698

2.9164 GBP

1p Ordinary

Sale

2,568

3.1029 GBP

1p Ordinary

Sale

2,499

3.0248 GBP

1p Ordinary

Sale

1,572

3.1607 GBP

1p Ordinary

Sale

1,357

3.0398 GBP

1p Ordinary

Sale

1,316

3.0401 GBP

1p Ordinary

Sale

1,291

2.7974 GBP

1p Ordinary

Sale

813

2.8878 GBP

1p Ordinary

Sale

713

3.0375 GBP

1p Ordinary

Sale

506

3.0357 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

Opening Short

4,139

2.9952 GBP

1p Ordinary

SWAP

Opening Short

122

3.0352 GBP

1p Ordinary

SWAP

Opening Long

97

2.8849 GBP

1p Ordinary

SWAP

Opening Short

6,121

3.0300 GBP

1p Ordinary

SWAP

Opening Short

14,644

3.0351 GBP

1p Ordinary

SWAP

Opening Long

16,417

3.0008 GBP

1p Ordinary

SWAP

Opening Short

4,922

3.0350 GBP

1p Ordinary

CFD

Opening Long

273

2.8447 GBP

1p Ordinary

CFD

Opening Short

2,957

2.8126 GBP

1p Ordinary

CFD

Opening Long

5,757

2.9485 GBP

1p Ordinary

CFD

Opening Long

1,572

3.1608 GBP

1p Ordinary

SWAP

Opening Short

369

2.7752 GBP

1p Ordinary

SWAP

Opening Short

4,299

3.0351 GBP

1p Ordinary

SWAP

Increasing Short

7,515

2.8606 GBP

1p Ordinary

SWAP

Increasing Short

3,108

2.8947 GBP

1p Ordinary

SWAP

Increasing Short

247,161

3.0350 GBP

1p Ordinary

SWAP

Decreasing Long

4,149

2.8783 GBP

1p Ordinary

SWAP

Decreasing Short

2,568

3.1029 GBP

1p Ordinary

CFD

Decreasing Long

1,273

2.9485 GBP

1p Ordinary

CFD

Closing Long

1,572

3.0821 GBP

1p Ordinary

CFD

Opening Short

207

3.0821 GBP

1p Ordinary

SWAP

Increasing Short

7,177

3.0023 GBP

1p Ordinary

SWAP

Decreasing Short

435

3.1149 GBP

1p Ordinary

SWAP

Increasing Short

1,714

2.8956 GBP

1p Ordinary

SWAP

Decreasing Long

413

3.0351 GBP

1p Ordinary

SWAP

Closing Short

2,354

3.0248 GBP

1p Ordinary

SWAP

Opening Long

145

3.0248 GBP

1p Ordinary

SWAP

Closing Short

11,219

2.9077 GBP

1p Ordinary

SWAP

Opening Long

96

2.9077 GBP

1p Ordinary

SWAP

Increasing Short

2,795

2.9321 GBP

1p Ordinary

SWAP

Increasing Long

4,143

3.0350 GBP

1p Ordinary

SWAP

Increasing Long

6,131

3.0695 GBP

1p Ordinary

SWAP

Increasing Long

17,116

2.8536 GBP

1p Ordinary

SWAP

Decreasing Long

979

2.8600 GBP

1p Ordinary

SWAP

Increasing Long

5,033

2.9594 GBP

1p Ordinary

SWAP

Decreasing Long

3,637

2.9349 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:

10 Sep 2026

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213