Dottikon ES : Opening Order Book for Share Placement of up to 7.6 Percent through Markus Blocher

MEDIA RELEASE

Dottikon, June 14, 2023

Ad hoc announcement pursuant to article 53 LR of the SIX Swiss Exchange

DOTTIKON ES - Opening Order Book for Share Placement of up to 7.6 Percent through Markus Blocher

Dottikon, Switzerland, June 14, 2023 - DOTTIKON ES Group, positioned as strategic development and manufacturing partner and specialized in the area of hazardous reactions and the exclusive synthesis of active pharmaceutical ingredients (API) and fine chemicals, announces that Dr. Markus Blocher, majority shareholder of Dottikon ES Holding AG ("DOTTIKON ES"), has informed that the order book in the private placement of up to approximately 7.6 percentage points of his directly held DOTTIKON ES registered shares at a fixed price of CHF 260 per share is open as of this morning, Wednesday, June 14, 2023. Investor subscriptions can be made via the nominated Sole Lead Manager, Zürcher Kantonalbank. The minimum subscription per investor is CHF 100'000.

The order book will be closed on Thursday, June 15, 2023, after closing of the Swiss Stock Exchange at the latest, or earlier if necessary, and the shares will subsequently be allocated. Expected trade date: June 16, 2023; expected value date: June 20, 2023.

DOTTIKON ES manufactures high-quality performance chemicals, intermediates, and exclusive active pharmaceutical ingredients (APIs) for the world's leading chemical, biotech, and pharmaceutical industry. The company with its production site in Dottikon (Aargau, Switzerland) is specialized in hazardous reactions and positions itself as strategic development and manufacturing partner and performance leader. Its safety culture created over the past 110 years guides the innovative use of hazardous reactions, low-temperature and high-pressure chemistry, as well as continuous processing in order to challenge, tighten, or shorten conventional chemical synthesis routes, improve selectivities, yields, and purities, as well as reduce energy consumption, waste, and CO2 emissions sustainably. The versatile technology and equipment portfolio is used, main- tained, and continuously expanded to design, develop, and optimize chemical processes and technical manufacturing procedures for the rapid scale-up from kilograms to multi-tons in order to produce and deliver the respective market volumes.

DOTTIKON ES' one-site strategy allows reduced decision and communication pathways. This ensures rapid and efficient project development and management, clear and transparent data and process documentation, and close customer communication.

Dottikon ES Holding AG

P.O. Box, 5605 Dottikon, Switzerland, Tel [phone], [e-mail], www.dottikon.com

Dottikon ES Holding AG is listed on the SIX Swiss Exchange. Symbol: DESN

Security number: 58258171

ISIN: CH0582581713

For further information, please contact

Markus Blocher, Ph.D.

CEO

Dottikon ES Holding AG Tel [phone] [e-mail]

Dottikon ES Holding AG

P.O. Box, 5605 Dottikon, Switzerland, Tel [phone], [e-mail], www.dottikon.com