PHAXIAM Therapeutics announces the completion of its reverse share split

PRESS RELEASE

PHAXIAM Therapeutics announces the completion of its reverse share split

Lyon (France) and Cambridge (MA, US), September 18^th,2023 - PHAXIAM Therapeutics (Nasdaq & Euronext: PHXM) (the "Company"), announces the completion today of the reverse share split of the shares composing the Company's share capital, as decided by the Executive Director on July 27^th, 2023, following sub-delegation granted by the Board of Directors on June 23^rd, 2023, made in accordance with the twenty-third extraordinary resolution of the General Shareholders' Meeting of June 23^rd, 2023.

The reverse share split involved the exchange of ten (10) existing shares with a par value of ten euro cents (€0.10) (the "Existing Shares") for one (1) new share with a par value of one euro (€1) (a "New Share").

The main features of this reverse share split, as detailed in the notice of reverse share split published in the Bulletin des AnnoncesLégalesObligatoires (BALO) on July 31^st, 2023 and in the press release published by the Company on July 27^th, 2023, are as follows:

• Number of Existing Shares subject to the reverse share split: sixty million seven hundred and fifty-one thousand and fifty-four (60,751,054) shares, each with a par value of ten euro cents (€0.10).
  
  
• Number of New Shares resulting from the reverse share split: six million seventy-five thousand one hundred and five (6,075,105) shares with a par value of one euro (€1) each.
  
  
• Listing of the New Shares: the New Shares resulting from the reverse share split have been admitted to trading on the Euronext regulated market in Paris, with effect from today, the first day of trading, and have been assigned a new ISIN code (FR001400K4B1).
  
  

Shareholders who were unable to obtain a number of shares that is a multiple of ten (10) will be compensated by their financial intermediary in accordance with Articles L. 228-6-1 and R. 228-12 of the French Commercial Code and market practice.

The next steps of the reverse share split will take place according to the following indicative timetable:

September 18th, 2023	Listing of the New Shares
September 19th2023	Book-entry of the New Shares (Record date)
September 20th, 2023	Date of payment-delivery of the New Shares

Adjustment of the exercise parity of rights or securities giving access to the capital: a subsequent notice will be published in the Bulletin des AnnoncesLégales et Obligatoires (BALO) to specify the terms of adjustment of the rights of holders of rights or securities giving access to the capital. In connection with the reverse share split described above, The Bank of New York Mellon (“BNY Mellon”), depositary for the Company’s American Depositary Receipt (“ADR”) program, will effect a reverse stock split on such ADR program with an effective date of September 18, 2023. Effective September 18, 2023, ADR holders of the Company will be required on a mandatory basis to surrender their old ADR(s) to BNY Mellon for cancellation and exchange to receive one (1) new American Depositary Share (“ADS”) (CUSIP: 29604W207) for every ten (10) old ADSs (CUSIP: 29604W108). Holders of ADSs in the Direct Registration System or in brokerage accounts will have their ADRs automatically exchanged and need not take any action. No fraction of an ADS will be issued. BNY Mellon will attempt to sell any fractions and distribute the cash proceeds to ADR holders.

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About PHAXIAMTherapeutics

PHAXIAMisabiopharmaceuticalcompanydevelopinginnovativetreatmentsforresistantbacterialinfections,which are responsible for many serious infections. The company is building on an innovative approach based on theuse ofphages,naturalbacterial-killingviruses.PHAXIAMisdevelopingaportfolioofphagestargeting3ofthemost resistantanddangerousbacteria,whichtogetheraccountformorethantwo-thirdsofresistanthospital-acquired infections: Staphylococcus aureus, Escherichia coli and Pseudomonasaeruginosa.

PHAXIAMislistedontheNasdaqCapitalMarketintheUnitedStates(ticker:PHXM)andontheEuronextregulated marketinParis(ISINcode:FR0011471135,ticker:PHXM).PHAXIAMispartoftheCACHealthcare,CACPharma
& Bio, CAC Mid & Small, CAC All Tradable, EnterNext PEA-PME 150 and Next Biotechindexes. For more information, please visitwww.erytech.com

Contacts

PHAXIAM Eric Soyer COO & CFO +33 4 78 74 44 38 investors@erytech.com

NewCap Mathilde Bohin / Dusan Oresansky Investors Relations ArthurRouillé Medias Relations +33 1 44 71 94 94 phaxiam@newcap.eu

Attachment

• PR_Phaxiam_Completion of the reverse share split_EN_VF

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