Abivax S.A.

Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

None

Certification by an exchange approving securities for listing

Notice of Effectiveness

Notice of Effectiveness

A correspondence can be sent as a document with another submission type or can be sent as a separate submission.

A correspondence can be sent as a document with another submission type or can be sent as a separate submission.

A correspondence can be sent as a document with another submission type or can be sent as a separate submission.

Form for the registration / listing of a class of securities on a national securities exchange pursuant to Section 12(b)

Venrock Healthcare Capital Partners III, L.P.: Major Shareholders

Venrock Healthcare Capital Partners III, L.P.: Major Shareholders

Sofinnova Crossover I: Major Shareholders

Deep Track Capital, LP: Major Shareholders

Prospectus filed pursuant to Rule 424(b)(4)

Filing under Securities Act Rules 163/433 of free writing prospectuses

Correspondence Related to Draft Registration Statement

Draft registration statement submitted by Emerging Growth Company under Securities Act Section 6(e) or by Foreign Private Issuer under Division of Corporation Finance policy

Correspondence Related to Draft Registration Statement

Draft registration statement submitted by Emerging Growth Company under Securities Act Section 6(e) or by Foreign Private Issuer under Division of Corporation Finance policy

Draft registration statement submitted by Emerging Growth Company under Securities Act Section 6(e) or by Foreign Private Issuer under Division of Corporation Finance policy