SECURITIES AND EXCHANGE COMMISSION
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 December 2025
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
| · | Eni: Financial Calendar 2026 |
| · | Eni: Board of Directors approves hybrid bond issue |
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.
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Eni S.p.A. |
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/s/ Paola Mariani |
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Name: Paola Mariani |
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Title: Head of Corporate |
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Secretary’s Staff Office |
Date: December 11, 2025

Eni: Financial Calendar
2026
San Donato Milanese (Milan), 10 December
2025 – Eni announces its 2026 annual calendar of corporate events, including the dates for the disclosure of the economic-financial
results which will be examined by the Board of Directors and the Shareholders’ Meeting during 2026:
| Preliminary financial statements as at December 31, 2025 and resolution on distribution of reserves for and in place of the 2025 dividend (third tranche) |
Meeting of the Board of Directors and press release on the distribution |
February 25, 2026 |
| Press release on preliminary financial statements and conference call |
February 26, 2026 |
| Annual Report 2025 including the draft financial statement |
Meeting of the Board of Directors |
March 18, 2026 |
| Press release |
March 18, 2026 |
| Strategic Plan 2026-2029 |
Meeting of the Board of Directors |
March 18, 2026 |
| Press release, market presentation (Capital Markets Update) and conference call |
March 19, 2026 |
| Resolution on distribution of reserves for and in place of the 2025 dividend (fourth tranche) |
Meeting of the Board of Directors |
April 2, 2026 |
| Press release |
April 2, 2026 |
| First quarter 2026 results |
Meeting of the Board of Directors |
April 23, 2026 |
| Press release and conference call |
April 24, 2026 |
| Annual Report 2025 |
Shareholders’ Meeting |
May 6, 2026
(single call) |
| Press release on Shareholders’ Meeting resolutions |
May 6, 2026 |
| Second quarter 2026 results and interim financial report as at June 30, 2026 and resolution on distribution of reserves for and in place of the 2026 dividend (first tranche)* |
Meeting of the Board of Directors and press release on distribution |
July 28, 2026 |
| Press release on results and conference call |
July 29, 2026 |
| Third quarter 2026 results and resolution on distribution of reserves for and in place of the 2026 dividend (second tranche)* |
Meeting of the Board of Directors and press release on distribution |
October 22, 2026 |
| Press release on results and conference call |
October 23, 2026 |
The third tranche for and in place of
the dividend for the 2025 fiscal year will be paid on March 25, 2026 (ex-dividend date: March 23, 2026; record date: March 24, 2026);
and the fourth tranche will be paid on May 20, 2026 (ex-dividend date: May 18, 2026; record date: May 19, 2026).
*The resolution and the payment of the
first and second tranches for and in place of the dividend for the 2026 financial year, through the use of available reserves,
are subject to a compliant resolution by the Shareholders' Meeting called to approve the Annual Report 2025; in that case the first tranche
will be paid on September 23, 2026 (ex-dividend date: September 21, 2026; record date: September 22, 2026) and the second tranche
will be paid on November 25, 2026 (ex-dividend date: November 23, 2026; record date: November 24, 2026).
Markets will be promptly informed
of any changes to the above calendar.
According to article 82-ter
Regulations on issuers (Consob Regulation No. 11971 of May 14, 1999 and subsequent amendments and inclusions), Eni intends to continue
providing, on a voluntary basis, Company’s quarterly financial results, in order to provide market and investors with regular information
about the Company’s financial and operating performances considering the disclosure policy followed by peers which are reporting
on a quarterly basis.
Quarterly results will include at
least the following key performance indicators:
| - | a measure of the performance of operating activities for the Group and the operating
segments of Eni, like operating profit or other equivalent measure (reported and on adjusted basis); |
| - | consolidated net results; |
| - | consolidated and by segment adjusted net results; |
| - | consolidated net financial position and cash flow for the period; |
| - | consolidated shareholder’s equity; |
Eni Company Contacts:
Press Office: Tel. +39.0252031875 – +39.0659822030
Freephone for shareholders (from Italy): 800940924
Freephone for shareholders (from abroad): +39.800 11 22 34 56
Switchboard: +39.0659821
ufficio.stampa@eni.com
segreteriasocietaria.azionisti@eni.com
investor.relations@eni.com
Website: www.eni.com


Eni: Board of Directors approves hybrid bond issue
San Donato Milanese (MI), 11 December 2025
– Eni's Board of Directors, chaired by Giuseppe Zafarana, today approved the possible issue of one or more hybrid subordinated bonds,
to be placed with institutional investors, with a value up to a maximum aggregate amount of 1 billion euro, to be issued in one or more
tranches by 30 June 2027.
The bonds, if issued, will enable Eni to maintain
a well-balanced financial structure and will be used for general corporate purposes. The bonds are intended to be listed on one or more
regulated markets or on multilateral trading facilities.
Eni Company Contacts:
Press Office: Tel. +39.0252031875 – +39.0659822030
Freephone for shareholders (from Italy): 800940924
Freephone for shareholders (from abroad): +39.800 11 22 34 56
Switchboard: +39.0659821
ufficio.stampa@eni.com
segreteriasocietaria.azionisti@eni.com
investor.relations@eni.com
Website:
www.eni.com
