Exhibit 99.1

Translation for information purpose only

INVENTIVA

Société Anonyme with a Board of Directors

with a share capital of EUR 956,623.91

Registered Office: 50, Rue de Dijon, 21121 Daix

537 530 255 Trade and Companies Register of Dijon

Notice of meeting

The shareholders of INVENTIVA (the “Company”) are informed that the ordinary and extraordinary general meeting (the “General Meeting”) will be held on May 22, 2025 at 9 a.m., at: Hôtel Villa M, 24-30, boulevard Pasteur - 75015 Paris, France.

As a reminder, the agenda of the General Meeting, unchanged from that published in the notice of the General Meeting published in the Bulletin des Annonces Légales Obligatoires on April 11, 2025 (bulletin n°44), is as follows:

Agenda

Reading of the reports of the Board of Directors and the Statutory Auditors;

Ordinary items

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Extraordinary items

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On an Ordinary basis

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The draft resolutions to be submitted to the vote of the General Meeting were published in the meeting notice of the Bulletin des Annonces Légales Obligatoires on April 11, 2025 (bulletin n°44) and remain unchanged.

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INFORMATION

Shareholder status

Pursuant to Article R. 22-10-28 of the French Commercial Code, will be able to participate in the General Meeting, the shareholders who will justify:

Only those shareholders who can prove their status by or before Tuesday May 20, 2025, zero hour, Paris time, under the conditions set out above, will be able to participate in this General Meeting.

Method of participation in the Shareholders' Meeting

Shareholders have several options for participating in the General Meeting. They can (1) vote while physically attending the General Meeting or (2) vote remotely or by proxy (a) by mail or (b) via Internet.

Pursuant to the provisions of Article R. 22-10-28, III, of the French Commercial Code, once a shareholder votes remotely, sends a proxy or asks for an admission card or a certificate to participate in the General Meeting, he or she will not be able to choose another method of participation.

The shareholders wishing to personally attend the General Meeting must request an admission card as soon as possible to receive the card in a timely manner:

Translation for information purpose only

On the day of the General Meeting, each shareholder will have to prove her quality during the registration process.

The shareholders not physically attending the General Meeting will be able to vote remotely or to give proxy to the President of the General Meeting, to their spouse, to their partner with whom a pacte civil de solidarité has been made, to another shareholder or to any other individual or legal entity of their choosing, subject to the conditions set forth in Articles L. 225-106 and L. 22-10-30 of the French Commercial Code.

Pursuant to the provisions of Article R. 225-79 of the French Commercial Code, the proxy given by a shareholder to be represented must be signed by the shareholder. The proxy will specify his/her last name, first name and address, and will designate a proxy, including his/her last name, first name and address or for a legal entity, its corporate name and registered office. The proxy does not have the right delegate its duties to another individual or legal entity.

It is specified that, for any proxy without indication of an agent, the President of the General Meeting will vote in favor of adopting the draft resolutions presented or approved to by the Board of Directors and vote against adopting all other draft resolutions. To vote otherwise, the shareholders will have to designate an agent who will accept to vote as provided by the principal.

For registered shareholders: a postal voting form or proxy form will be sent directly to them. This form should be returned in the prepaid T envelope enclosed with the notice of meeting.

For holders of bearer shares: from this day, the postal voting form or proxy form can be requested from the intermediaries managing their shares. Each demand must be addressed by the financial intermediary to the Services des Assemblées of Société Générale, 32, rue du Champs de Tir, CS 30812, 44308 Nantes Cedex 3 at the latest six days before the date of the General Meeting (Article R. 225-75 of the French Commercial Code). The single postal voting form or proxy form must be submitted with a certificate of securities ownership drawn up by the financial intermediary who will have to forward these documents to the Services des Assemblées of Société Générale, 32, rue du Champs de Tir, CS 30812, 44308 Nantes Cedex 3.

In any case, the postal voting form or proxy voting form duly filled and signed (and accompanied by the certificate of securities ownership for the bearer shares) must be returned in such a way that the Services des Assemblées of Société Générale or the Company can receive it at least 3 days before the date of the General Meeting (that is Monday May 19, 2025).

Shareholders also have the option of transmitting their voting instructions and giving or revoking a proxy via Internet before the General Meeting, on the website Votaccess, under the following conditions:

Translation for information purpose only

They may also appoint or revoke a proxy by sending an e-mail bearing an electronic signature, obtained by them from an authorized third-party certifier under the legal and regulatory conditions in force, to the e-mail address agiva22052025@inventivapharma.com, specifying their surname, first name, address and Société Générale identifier for pure registered shareholders (information available at the top left of their account statement) or their identifier with their authorized intermediary for administered registered shareholders, as well as the surname, first name and address of the appointed or revoked proxy;

SGSS is available to answer shareholder queries from 9:30 a.m. to 6:00 p.m. on the following telephone number: + 33 (0)2 51 85 67 89;

Beware, only those shareholders whose account holder has subscribed to Votaccess will be able to vote, give or revoke a proxy via Internet.

If the account holder of the shareholder has not subscribed to Votaccess, the notice of appointment and revocation of a proxy can nevertheless be effectuated by electronic means in accordance with the provisions of Articles R. 22-10-24 and R. 225-79 of the French Commercial Code according to the following procedures: by sending an e-mail with an electronic signature, obtained by them from a third party certifier duly authorized pursuant to legal and regulatory provisions in force, to the electronic address agiva22052025@inventivapharma.com specifying their last name, first name, address, and their share-account's full bank references, as well as the last name, first name and address of the appointed or revoked agent, and then by asking imperatively to the authorized intermediary managing their share-accounts to send a written confirmation to the Services des Assemblées of Société Générale.

In order for the duly signed and completed appointments or revocations of proxy to be validly taken into account, they must reach the Company no later than Monday May 19, 2025.

The revocation of a proxy is carried out under the same conditions of form as those used for its appointment.

The secured platform Votaccess will be open as of Friday May 2, 2025, 9 a.m., Paris time. The ability to vote, give or revoke a proxy via Internet prior to the General Meeting will end on Wednesday May 21, 2025, 3 p.m., Paris time. Shareholders are advised not to wait until the last days before the General Meeting to enter their instructions.

You are reminded that, in accordance with the provisions of Article R. 22-10-28 of the French Commercial Code:

Submission of written questions

In accordance with the provisions of Article R. 225-84 of the French Commercial Code, each shareholder will have the right to submit written questions to the Board of Directors no later than the fourth (4th) business day preceding the date of the Shareholders' Meeting, i.e. Friday May 16, 2025.

Translation for information purpose only

Requests for submissions of written questions must be sent to the Company's registered office by registered letter with acknowledgement of receipt. They must be accompanied by a certificate of account registration.

Right of communication

All the documents and information provided for in Article R. 22-10-23 of the French Commercial Code (in particular the text of the draft resolutions presented to the General Meeting by the Board of Directors) can be consulted on the Company's website (www.Inventivapharma.com) as of the twenty first day preceding the meeting, that is Thursday May 1st, 2025.

All the documents referred to in Articles R. 225-89 seq. of the French Commercial Code will be made available to shareholders at the Company's registered office as of the publication of the notice of meeting or on the fifteenth day preceding the General Meeting at the latest, depending on the document concerned.

As from the notice of meeting, shareholders may ask the Company to send them the documents and information mentioned in Articles R. 225-81 and R. 225-83 of the French Commercial Code, up to and including the fifth day, preferably by email (agiva22052025@inventivapharma.com) or at the head office by registered letter with acknowledgment of receipt. To this end, the shareholder shall indicate one's e-mail address in the request so that the Company can validly send him said documents in return. Bearer shareholders must provide proof of this status by sending a certificate of registration.

Audiovisual broadcasting

In accordance with Article R. 22-10-29-1 of the French Commercial Code, the General Meeting will be broadcast live in its entirety via the following link: https://inventivapharma.com/fr/investisseurs/assemblees-generales/. A recording of the General Meeting will be available for consultation on the Company's website no later than seven (7) working days after the date of the General Meeting and for at least two (2) years from the date it goes online.

The Board of Directors