Gooch & Housego PLC
("G&H", the "Company" or the "Group")

Further Issue of Shares in relation to the Acquisition of Global Photonics

and

Total Voting Rights

Gooch & Housego PLC (AIM: GHH), the specialist manufacturer of optical components & systems, announces that further to its announcement on 18 June 2025 regarding the completion of the acquisition of U.S.-based Global Photonics, the Company has issued a further 84,477 new ordinary shares of 20 pence each in the capital of the Company ("Ordinary Shares") as the final consideration payment in relation to the acquisition.

Application has been made to the London Stock Exchange for these new Ordinary Shares to be admitted to trading on AIM ("Admission"). Admission is expected to become effective and dealings in the new Ordinary Shares are expected to commence at 8.00 a.m. on 13 October 2025. These new Ordinary Shares rank pari passu with the existing Ordinary Shares of the Company.

Following the issue of these new Ordinary Shares, the Company's issued share capital will consist of 27,199,510 Ordinary Shares, each with one voting right. The Company does not hold any ordinary shares in treasury. Therefore, the total number of voting rights in the Company will be 27,199,510. This 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.

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Notes to editors

Gooch & Housego is a photonics technology business headquartered in Ilminster, Somerset, UK with operations in the U.S. and Europe. A world leader in its field, the company researches, 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.