DOTTIKON ES : Free Float Increased – Markus Blocher Now Holds 65.27 Percent

MEDIA RELEASEDottikon, June 16, 2023

Ad hoc announcement pursuant to article 53 LR of the SIX Swiss Exchange DOTTIKON ES Free Float Increased - Markus Blocher Now Holds 65.27 Percent

Dottikon, Switzerland, June 16, 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, resident of 8832 Wollerau (Schwyz, Switzerland), majority shareholder of Dottikon ES Holding AG ("DOTTIKON ES"), has placed a total of 330'278 of his directly held DOTTIKON ES registered shares as part of a private placement among investors for a fixed price of CHF 260 per share.

With the placement among more than two dozen long-termentrepreneurship-oriented investors, the objective of broadening the shareholder base and increasing the free float is achieved. After the private placement, Dr. Markus Blocher's direct participation crossed the threshold of 10 percent and his overall participation including the shares held by EVOLMA Holding AG, based in 8832 Wollerau (Schwyz, Switzerland), the threshold of 66 2/3 percent. The direct participation of Dr. Markus Blocher is now 8.93 percent and the overall participation including the shares held by EVOLMA Holding AG is 65.27 percent.

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