Washington, D.C. 20549

________________________

Form 6-K

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of May 2023

Eni S.p.A.

(Exact name of Registrant as specified in its charter)

Piazzale Enrico Mattei 1 -- 00144 Rome, Italy

(Address of principal executive offices)

_________________________

(Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.)

Form 20-F X Form 40-F

_________________________

(Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2b under the Securities Exchange Act of 1934.)

Yes _ No X

(If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): )

Table of contents

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorised.

Date: May 17, 2023

Eni: Report on the purchase of treasury shares on

May 12, 2023

San Donato Milanese (Milan), 17 May 2023 - On May 12, 2023, Eni acquired on the Euronext Milan no. 980,441 shares, at a weighted average price per share equal to 13.3065 euro, for a total consideration of 13,046,238.17 euro within the authorization to purchase treasury shares approved by the Shareholders' Meeting on 10 May 2023, previously subject to disclosure pursuant to art. 144-bis of Consob Regulation 11971/1999.

Following the purchases made on 12 May 2023, considering the treasury shares already held and the cancellation of 195,550,084 treasury shares resolved by the Shareholders' Meeting on 10 May 2023 and under execution, Eni holds n. 31,528,191 shares equal to 0.93% of the share capital.

Details of the daily transactions are reported below.