Theradiag

Major Shareholding Notification • Nov 30, 2021

THERADIAG notes the acquisition of a stake in its capital by BIOSYNEX

Croissy-Beaubourg (France), November 30, 2021, 7.30 am CET – THERADIAG (ISIN: FR0004197747, Ticker: ALTER), a company specializing in in vitro diagnostics and Theranostics, today announces that it has received yesterday a letter from BIOSYNEX informing it of its acquisition of a stake in its capital and the crossing of statutory thresholds, in accordance with article 12.3 of THERADIAG's articles of association.

Following acquisitions on the market and its participation in the Rights Issue, BIOSYNEX held 2,468,932 shares, i.e. 18.82% of THERADIAG's share capital and 18.89% of its voting rights, as at 29 November 2021 at 8:00 a.m.

About Theradiag

Theradiag is the market leader in biotherapy monitoring. Capitalizing on its expertise in the diagnostics market, the Company has been developing, manufacturing, and marketing innovative in vitro diagnostic (IVD) tests for over 30 years.

Theradiag pioneered "theranostics" testing (combining therapy with diagnosis), which measures the efficacy of biotherapy in the treatment of chronic inflammatory diseases. Going beyond mere diagnosis, Theranostics aims to help clinicians set up "customized treatment" for each patient. This method favors the individualization of treatment, evaluation of its efficacy and the prevention of drug resistance. In response to this challenge, Theradiag develops and markets the CE-marked TRACKER® range, a comprehensive solution of inestimable medical value.

The Company is based in Marne-la-Vallée, near Paris, has operations in over 70 countries and employs over 60 people. In 2020, the Company posted revenue of €10.4 million. The Theradiag share is listed on Euronext Growth Paris (ISIN: FR0004197747) and is eligible for the French PEA-PME personal equity plan.

For more information about Theradiag, please visit our website: https://www.theradiag.com/

Theradiag Bertrand de Castelnau CEO/Managing Director Tel.: +33 (0)1 64 62 10 12 contact@theradiag.com

NewCap Financial Communications & Investor Relations Pierre Laurent Quentin Massé Tel.: +33 (0)1 44 71 94 94 theradiag@newcap.eu

NewCap Media Relations Nicolas Mérigeau Tel.: +33 (0)1 44 71 94 98 nmerigeau@newcap.fr