Holding(s) in Company

In brief · summary, not quotable

Mikhail Stiskin has increased their holding in SDI Group PLC, crossing the 7.5% voting rights threshold on March 12, 2026, with a total of 7,844,565 voting rights, representing 7.501511% of the issued share capital. This follows previous notifications where Stiskin's holdings were at 6.059492% on March 5, 2026, 5.222757% on November 13, 2025, 4.055153% on October 23, 2025, and 3.132595% on October 2, 2025. The notifications indicate an acquisition of voting rights, with no financial instruments involved.

Full announcement

Select text to share a quote on X · sign in to keep highlights & notes in your SDI notes

Issuer Details

ISIN

GB00B3FBWW43

Issuer Name

SDI GROUP PLC

UK or Non-UK Issuer

UK

Reason for Notification

An acquisition or disposal of voting rights

Details of person subject to the notification obligation

Name

Mikhail Stiskin

City of registered office (if applicable)

Limassol

Country of registered office (if applicable)

Cyprus

Details of the shareholder

City of registered office (if applicable)

Country of registered office (if applicable)

Date on which the threshold was crossed or reached

12-Mar-2026

Date on which Issuer notified

13-Mar-2026

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

Resulting situation on the date on which threshold was crossed or reached	7.501511	0.000000	7.501511	7844565
Position of previous notification (if applicable)	6.059492	0.000000	6.059492	6336600
8A. Voting rights attached to shares
Class/Type of shares ISIN code(if possible)	Number of direct voting rights (DTR5.1)	Number of indirect voting rights (DTR5.2.1)	% of direct voting rights (DTR5.1)	% of indirect voting rights (DTR5.2.1)
GB00B3FBWW42			7844565	7.501511
Sub Total 8.A			7844565	7.501511%

Financial Instruments according to (DTR5.3.1R.(1) (a))

Sub Total 8.B1

Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

Sub Total 8.B2

Information in relation to the person subject to the notification obligation
In case of proxy voting

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

Additional Information
Date of Completion

13-Mar-2026

Place Of Completion

Limassol

TR-1: Standard form for notification of major holdings

Issuer Details

ISIN

GB00B3FBWW43

Issuer Name

SDI GROUP PLC

UK or Non-UK Issuer

UK

Reason for Notification

An acquisition or disposal of voting rights

Details of person subject to the notification obligation

Name

Mikhail Stiskin

City of registered office (if applicable)

Limassol

Country of registered office (if applicable)

Cyprus

Details of the shareholder

City of registered office (if applicable)

Country of registered office (if applicable)

Date on which the threshold was crossed or reached

05-Feb-2026

Date on which Issuer notified

12-Mar-2026

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

Resulting situation on the date on which threshold was crossed or reached	6.059492	0.000000	6.059492	6336600
Position of previous notification (if applicable)	5.222757	0.000000	5.222757	5461600
8A. Voting rights attached to shares
Class/Type of shares ISIN code(if possible)	Number of direct voting rights (DTR5.1)	Number of indirect voting rights (DTR5.2.1)	% of direct voting rights (DTR5.1)	% of indirect voting rights (DTR5.2.1)
GB00B3FBWW43			6336600	6.059492
Sub Total 8.A			6336600	6.059492%

Financial Instruments according to (DTR5.3.1R.(1) (a))

Sub Total 8.B1

Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

Sub Total 8.B2

Information in relation to the person subject to the notification obligation
In case of proxy voting

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

Additional Information
Date of Completion

13-Mar-2026

Place Of Completion

Limassol

TR-1: Standard form for notification of major holdings

Issuer Details

ISIN

GB00B3FBWW43

Issuer Name

SDI GROUP PLC

UK or Non-UK Issuer

UK

Reason for Notification

An acquisition or disposal of voting rights

Details of person subject to the notification obligation

Name

Mikhail Stiskin

City of registered office (if applicable)

Limassol

Country of registered office (if applicable)

Cyprus

Details of the shareholder

City of registered office (if applicable)

Country of registered office (if applicable)

Date on which the threshold was crossed or reached

13-Nov-2025

Date on which Issuer notified

12-Mar-2026

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

Resulting situation on the date on which threshold was crossed or reached	5.222757	0.000000	5.222757	5461600
Position of previous notification (if applicable)	4.055153	0.000000	4.055153	4240600
8A. Voting rights attached to shares
Class/Type of shares ISIN code(if possible)	Number of direct voting rights (DTR5.1)	Number of indirect voting rights (DTR5.2.1)	% of direct voting rights (DTR5.1)	% of indirect voting rights (DTR5.2.1)
GB00B3FBWW43			5461600	5.222757
Sub Total 8.A			5461600	5.222757%

Financial Instruments according to (DTR5.3.1R.(1) (a))

Sub Total 8.B1

Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

Sub Total 8.B2

Information in relation to the person subject to the notification obligation
In case of proxy voting

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

Additional Information
Date of Completion

13-Mar-2026

Place Of Completion

Limassol

TR-1: Standard form for notification of major holdings

Issuer Details

ISIN

GB00B3FBWW43

Issuer Name

SDI GROUP PLC

UK or Non-UK Issuer

UK

Reason for Notification

An acquisition or disposal of voting rights

Details of person subject to the notification obligation

Name

Mikhail Stiskin

City of registered office (if applicable)

Limassol

Country of registered office (if applicable)

Cyprus

Details of the shareholder

City of registered office (if applicable)

Country of registered office (if applicable)

Date on which the threshold was crossed or reached

23-Oct-2025

Date on which Issuer notified

12-Mar-2026

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

Resulting situation on the date on which threshold was crossed or reached	4.055153	0.000000	4.055153	4240600
Position of previous notification (if applicable)	3. 132595	0.000000	3. 132595	3275852
8A. Voting rights attached to shares
Class/Type of shares ISIN code(if possible)	Number of direct voting rights (DTR5.1)	Number of indirect voting rights (DTR5.2.1)	% of direct voting rights (DTR5.1)	% of indirect voting rights (DTR5.2.1)
GB00B3FBWW43			4240600	4.055153
Sub Total 8.A			4240600	4.055153%

Financial Instruments according to (DTR5.3.1R.(1) (a))

Sub Total 8.B1

Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

Sub Total 8.B2

Information in relation to the person subject to the notification obligation
In case of proxy voting

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

Additional Information
Date of Completion

13-Mar-2026

Place Of Completion

Limassol

TR-1: Standard form for notification of major holdings

Issuer Details

ISIN

GB00B3FBWW43

Issuer Name

SDI GROUP PLC

UK or Non-UK Issuer

UK

Reason for Notification

An acquisition or disposal of voting rights

Details of person subject to the notification obligation

Name

Mikhail Stiskin

City of registered office (if applicable)

Limassol

Country of registered office (if applicable)

Cyprus

Details of the shareholder

City of registered office (if applicable)

Country of registered office (if applicable)

Date on which the threshold was crossed or reached

02-Oct-2025

Date on which Issuer notified

12-Mar-2026

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

Resulting situation on the date on which threshold was crossed or reached	3. 132595	0.000000	3. 132595	3275852
Position of previous notification (if applicable)
8A. Voting rights attached to shares
Class/Type of shares ISIN code(if possible)	Number of direct voting rights (DTR5.1)	Number of indirect voting rights (DTR5.2.1)	% of direct voting rights (DTR5.1)	% of indirect voting rights (DTR5.2.1)
GB00B3FBWW43			3275852	3. 132595
Sub Total 8.A			3275852	3. 132595 %

Financial Instruments according to (DTR5.3.1R.(1) (a))

Sub Total 8.B1

Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b))

Sub Total 8.B2

Information in relation to the person subject to the notification obligation
In case of proxy voting

Name of the proxy holder

The number and % of voting rights held

The date until which the voting rights will be held

Additional Information
Date of Completion

13-Mar-2026

Place Of Completion

Limassol

Cleaned text: letterheads, contacts and legal notices removed. View the original announcement ↗ · Company filings. Not investment advice.

Highlight & share

Select text in the announcement to share it as a quote – or sign in to save highlights and notes.

SDI Group SDI · £100m

Company page →

Share price

−0.5% on the day

+25.0% since · 95.5p on 9 Oct 2026

SDI Group – more announcements

21 May Trading Update
11 May Directorate Change
17 Mar News from Portfolio Companies
13 Feb Acquisition of PRP Optoelectronics
3 Dec Half-year Results
7 Oct AIM Rule 17 and Schedule 2(g) Update
6 Oct Appointment of Joint Corporate Broker

All SDI announcements →