Exercise of Options

SDI Group plc

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

Exercise of Options

Total Voting Rights

SDI Group plc, the AIM quoted group focused on the design and manufacture of scientific and technology products for use in digital imaging and sensing and control applications, announces the exercise of share options by a number of employees of the Company over 300,000 new ordinary shares of 1 pence each in the capital of the Company ("Ordinary Shares") (the "Exercise") at an exercise price of 17.2 pence per share.

Application will be made to the London Stock Exchange for the 300,000 Ordinary Shares to be admitted to trading on AIM and admission is expected to occur on or around 31 January 2020. The new Ordinary Shares will rank pari passu with the existing Ordinary Shares in issue.

Total Voting Rights

For the purpose of the Disclosure Guidance and Transparency Rules, following the above issue of equity, the issued share capital of the Company will comprise 97,503,951 ordinary shares of 1p each. The above figure may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company, under the Disclosure Guidance and Transparency Rules.

FOR FURTHER INFORMATION:

SDI Group plc 01223 320 480

Ken Ford, Chairman

Mike Creedon, Chief Executive Officer

Jon Abell, Chief Financial Officer

www.scientificdigitalimaging.com

finnCap Ltd 020 7220 0500

Ed Frisby/Kate Washington - Corporate Finance

Andrew Burdis/Sunila de Silva - ECM

JW Communications 07818 430 877

Julia Wilson - Investor & Public Relations

About SDI Group plc

SDI designs and manufactures scientific and technology products for use in digital imaging and sensing and control applications including life sciences, healthcare, astronomy, manufacturing, precision optics and art conservation. SDI operates through its company divisions: Atik Cameras, Synoptics, Graticules Optics, Sentek, Astles Control Systems, Applied Thermal Control, MPB Industries and Chell Instruments.

SDI continues to grow by developing its own technology advancements and by improving its global sales channels, as well as through pursuing strategic, complementary acquisitions.