Notice of Half Year Results

Gooch & Housego PLC

('G&H' or the 'Company' or the 'Group')

Notice of Half Year Results,

Analyst Meeting and IMC Presentation

Gooch & Housego PLC (AIM: GHH), the specialist manufacturer of optical components and systems, will announce its results for the six months ended 31 March 2026 on Tuesday, 2 June 2026.

A meeting for analysts will be held at 9.30am (BST) on the morning of the results at the offices of Burson Buchanan, Rose Court, 2 Southwark Bridge Road, London, SE1 9HS. To register your attendance, please email Burson Buchanan on G&H@buchanan.uk.com.

The Company will also be presenting via the Investor Meet Company platform on Thursday, 4 June 2026 at 4.00pm (BST). Questions can be submitted pre-event via the Investor Meet Company dashboard up until 9.00am BST on Wednesday, 3 June 2026, or at any time during the live presentation.

Investors and potential investors can sign up to Investor Meet Company, and add to follow Gooch & Housego PLC, via: https://www.investormeetcompany.com/gooch-housego-plc/register-investor

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For further information please contact:

Notes to Editors

Gooch & Housego is a photonics technology business headquartered in Ilminster, Somerset, UK with operations in the USA and Europe. A world leader in its field, the Group designs, engineers and manufactures advanced photonic systems, components and instrumentation for applications in the Aerospace & Defence, Industrial, Life Sciences and Scientific Research sectors. World leading design, development and manufacturing expertise is offered across a broad range of complementary technologies.

For more information, please visit www.gandh.com.