Rosslyn Data Technologies PlcLSE: RDT

Director/PDMR Dealings

14 April 2026

Rosslyn Data Technologies plc

("Rosslyn", the "Group" or the "Company")

Director/PDMR Dealings

Further to the announcements made on 25 March 2026 and 26 March 2026 in relation to the Fundraising, and following Second Admission becoming effective at 8.00 a.m. on 14 April 2026, the Company confirms that the following Directors and PDMR have each subscribed for Placing Shares at the Issue Price of 2.0 pence per new Ordinary Share, as detailed below:

Director / PDMR

No. of Conditional Placing Shares subscribed for

No. of Ordinary Shares held on Secon Admission

% of Enlarged Issued Share Capital

James Appleby

2,000,000

8,830,909

7.49%

John Chessher

1,000,000

1,000,000

0.85%

Ed Riddell

500,000

500,000

0.42%

Capitalised terms in this announcement shall have the same meaning as in the Circular.

The notifications below are intended to satisfy the Company's obligations under Article 19(3) of the Market Abuse Regulation.

For further information please contact:

Rosslyn

Paul Watts, Chief Executive Officer

James Appleby, Chairman

+44 (0)20 3285 8008

Cavendish Capital Markets Limited (Nominated adviser and Broker)

Stephen Keys/George Lawson/Joe Smith

+44 (0)20 7220 0500

Gracechurch Group (Financial PR)

Claire Norbury/Anysia Virdi

+44 (0)20 4582 3500

About Rosslyn

Rosslyn (AIM: RDT) provides an award-winning spend intelligence platform. The Rosslyn Platform helps organizations with diverse supply chains mitigate risk and make informed strategic decisions. It leverages automated workflows, artificial intelligence and machine learning to extract and consolidate procurement data providing visibility of complex supplier data, enabling supplier spend savings and delivering rapid ROI. For more information visit www.rosslyn.ai. Investors wishing to contact the Company should email investors@rosslyn.ai.

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

James Appleby

2

Reason for the notification

a)

Position/status

Non-Executive Chairman

b)

Initial notification /Amendment

Initial notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Rosslyn Data Technologies plc

b)

LEI

213800UJ7YTBGGXGJN09

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of 0.1p each

Identification code

GB00BMV2DB09

b)

Nature of the transaction

Subscription for Placing Shares

c)

Price(s) and volume(s)

Price(s)

Volume(s)

2.0p

2,000,000

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

14 April 2026

f)

Place of the transaction

XOFF

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

John Chessher

2

Reason for the notification

a)

Position/status

Non-Executive Director

b)

Initial notification /Amendment

Initial notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Rosslyn Data Technologies plc

b)

LEI

213800UJ7YTBGGXGJN09

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of 0.1p each

Identification code

GB00BMV2DB09

b)

Nature of the transaction

Subscription for Placing Shares

c)

Price(s) and volume(s)

Price(s)

Volume(s)

2.0p

1,000,000

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

14 April 2026

f)

Place of the transaction

XOFF

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Ed Riddell

2

Reason for the notification

a)

Position/status

Finance Director

b)

Initial notification /Amendment

Initial notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Rosslyn Data Technologies plc

b)

LEI

213800UJ7YTBGGXGJN09

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of 0.1p each

Identification code

GB00BMV2DB09

b)

Nature of the transaction

Subscription for Placing Shares

c)

Price(s) and volume(s)

Price(s)

Volume(s)

2.0p

500,000

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

14 April 2026

f)

Place of the transaction

XOFF

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