Horizon Discovery : Block Listing Six Monthly Return

Horizon Discovery Group plc

27 January 2020

Horizon Discovery Group plc

Block Listing Six Monthly Return

27 January 2020:Horizon Discovery Group plc (LSE: HZD) ('Horizon') provides the following update in accordance with Schedule Six of the AIM Rules for Companies regarding its existing block listing arrangements:

Name of applicant:	Horizon Discovery Group plc
Name of scheme(s):	a) Horizon Discovery Limited Enterprise Management Incentive Share Option Scheme b) Horizon Discovery Group plc Long Term Incentive Plan c) Horizon Discovery 2014 Sharesave Scheme d) Horizon Discovery Group plc US Employee Stock Purchase Plan
Period of return (from / to):	From 26 July 2019 to 25 January 2020
Number of securities admitted and date of admission	Total of 3,000,000 ordinary shares of 1p each, admission date 26 July 2017, split: a) 1,398,000 b) 1,392,000 c) 110,000 d) 100,000 Further 500,000 ordinary shares of 1p each, admission date 27 July 2018, split: a) 0 b) 150,000 c) 150,000 d) 200,000
Balance of unallotted securities under schemes from previous return:	Total of 1,723,992 ordinary shares of 1p each, split: a) 609,750 b) 912,893 c) 85,760 d) 115,589
Plus:The amount by which the block scheme(s) has been increased or application has been made to increase since the date of the last return (if any increase has been applied for):	Further 1,500,000 ordinary shares of 1p each, admission date 28 October 2019, split: a) 0 b) 500,000 c) 500,000 d) 500,000
Less:Number of securitiesissued/allotted under scheme(s) during period:	Total of 240,348 ordinary shares of 1p each, split: a) 7,325 b) 60,217 c) 17,789 d) 155,017
Equals:Balance under scheme(s) not yet issued/allotted at end of period:	Total of 2,983,644 ordinary shares of 1p each, split: a) 602,425 b) 1,352,676 c) 567,971 d) 460,572

ENDS

For further information from Horizon Discovery Group plc, please contact:

Horizon Discovery Group plc

Terry Pizzie, Chief Executive Officer

Jayesh Pankhania, Chief Financial Officer

Jon Davies, Head of Investor Relations

Tel: [phone]

Numis Securities Limited (Broker and NOMAD)

Freddie Barnfield / Tom Ballard / Duncan Monteith

Tel: [phone]

Consilium Strategic Communications (UK Financial Media and Investor Relations)

Mary-Jane Elliott / Matthew Neal / Melissa Gardiner

Tel: [phone]

Email: [e-mail]

Westwicke, an ICR Company (US Investor Relations)

Stephanie Carrington

Tel. [phone]

Email: [e-mail]

About Horizon Discovery Group plcwww.horizondiscovery.com

Horizon Discovery Group plc (LSE: HZD) ('Horizon') drives the application of gene editing and gene modulation within the global life science market - supporting scientists on the path from research to therapy.

Built upon more than a decade of experience in the engineering of cell lines, Horizon offers an unmatched portfolio of tools and services to help scientists gain a greater understanding of gene function, identify genetic drivers behind human disease, deliver biotherapeutics, cellular and gene therapies for precision medicine as well as develop and validate diagnostic workflows.

Horizon's solutions enable almost any gene to be altered, or its function modulated, in human and other mammalian cell lines.

The Company's customers include many of the world's foremost academic institutes, global biopharmaceutical and biotechnology companies as well as clinical diagnostic laboratories. Insight into the challenges faced by these organizations enables Horizon to focus efforts on development of innovative solutions that not only differentiate the Company's offering, but also fuel development of the next wave of precision medicines.

Horizon is headquartered in Cambridge, UK with offices in USA and Japan. The Group is listed on the London Stock Exchange's AIM market under the ticker HZD.