SECURITIES AND EXCHANGE COMMISSION

Washington, DC 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 March 2007

Enel Società per Azioni

Viale Regina Margherita 137
00198, Rome
Italy

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 þ Form 40-F o

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 12g3-2(b) under the Securities Exchange Act of 1934.

Yes o No þ

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

Certain of the information included in this Report is forward looking and is subject to important risks and uncertainties that could cause actual results to differ materially. The Company’s core business includes the generation, distribution and sale of electricity and the distribution and sale of gas. The Company’s outlook is predominately based on its interpretation of what it considers to be the key economic factors affecting its businesses. Forward-looking statements with regard to the Company’s businesses involve a number of important factors that are subject to change, including: the many interrelated factors that affect customers’ demand, including general economic conditions, industry trends, and increased competition in each of the Company’s markets; the Company’s ability to implement successfully its cost reduction program; the Company’s ability to implement its strategy focused on its core energy business; future capital expenditure and investments; legislation, particularly that relating to the regulation of the markets for electricity and other public utility services, tariff regimes, the environment, trade and commerce and infrastructure development; the actions of competitors in various industries in which the Company competes; production difficulties, including capacity and supply constraints; labor relations; interest rates and currency exchange rates; political and civil unrest; and other risks and uncertainties.

The information included in this Report has been given to Commissione Nazionale per le Società e la Borsa (CONSOB), the Italian public authority regulating Italian capital markets, and/or to Borsa Italiana S.p.A., the company owning and managing the Mercato Telematico Azionario, the Italian automated screen-based trading system on which the ordinary shares of Enel Società per Azioni are listed, or is otherwise furnished pursuant to General Instruction B to the General Instructions to Form 6-K.

Table of contents:

— Press Release dated March 1223, 2007.; — ~~Press~~Notice ~~Release~~of a change in the share capital of Enel S.p.A. dated March 1213, 2007.

Press Release

~~ENEL:~~NEGOTIATIONS UNDER ~~DERIVATIVE~~WAY ~~CONTRACTS~~BETWEEN ~~SIGNED~~ENEL TOAND ~~ACQUIRE ANOTHER 2.98% OF ENDESA~~ACCIONA

Rome, March 1223, 2007 -— Enel S.p.A. (Enel) ~~informs~~and ~~that~~ its wholly-owned subsidiary Enel Energy ~~Europe~~ Europe S.r.l. (EEE,) inform ~~which~~that ~~already~~negotiations ~~owns~~with 9Acciona S.9%A. ~~of Endesa’s share capital~~(Acciona) ~~has~~are ~~finalized~~at aan ~~share~~advanced ~~swap~~stage, even ~~transaction~~though, ~~with~~up ~~Mediobanca~~to ~~whose~~now, ~~underlying~~they ~~security~~have isnot ~~represented~~yet bycome ~~a maximum of 31,500,000 shares of Endesa (equal~~ to ~~2.98%~~a offinal ~~the latter share capital)~~agreement.

The ~~procedure~~negotiations ~~for~~regard the ~~liquidation~~possible isdevelopment of a ~~cash~~joint ~~settlement,~~project ~~with~~on ~~the~~Endesa ~~conditional~~S.A. ~~right~~(Endesa) ~~for EEE to elect~~should ~~physical~~E.ON’s ~~settlement,~~A.G. ~~which~~(E.ON) ispublic ~~subject~~tender ~~among~~offer ~~other~~not ~~requirements~~reach to50% ~~the~~of ~~Enel’s obtaining~~ the ~~required administrative~~share ~~authorizations~~capital ~~needed to complete the acquisition~~ of Endesa~~’s shares~~.

ToThe ~~fulfil~~implementation ~~the~~of ~~aforementioned~~such ~~share~~a ~~swap~~project ~~transaction~~would involve, ~~EEE~~in ~~has~~compliance ~~obtained~~with ~~financing~~current ~~sources~~Spanish ~~for~~laws ~~the~~and ~~same~~regulations, ~~total~~the ofjoint ~~31,500,000~~formulation ~~shares~~between ofEnel ~~Endesa~~and atAcciona anof ~~average~~a ~~price~~voluntary ofpublic 39tender ~~euros~~offer ~~per~~for the entire share capital of Endesa.

It is restated that, although negotiations with Acciona are advancing positively, to this moment no definitive agreement has yet been reached. As soon as this agreement is reached, Enel will provide to inform the public immediately.

~~Press~~Notice of ~~Release~~a change in the share capital of Enel S.p.A.

~~ENEL:~~Enel TOS.p.A. ~~DATE~~informs ~~DERIVATIVE~~the ~~CONTRACTS~~market ~~HAVE~~of ~~BEEN~~the ~~SIGNED~~new ~~FOR~~composition ~~THE~~of ~~ACQUISITION~~its OFshare ANcapital ~~OVERALL~~(entirely subscribed ~~14.98%~~and OFpaid up) following the partial execution — during the period between February 12, ~~ENDESA~~2007 and February 26, 2007 — of the resolutions to increase the aforesaid capital adopted by the Board of Directors at its meetings on April 10, 2003 (for the Stock-option Plan for the year 2002), April 7, 2004 (for the Stock-option Plan for the year 2003) and March 30, 2005 (for the Stock-option Plan for the year 2004).

~~Rome~~Specifically, ~~March~~in the aforesaid period between February 12, 2007 -and February 26, 2007 a total of 531,037 ordinary Enel S.p.A. ~~(Enel)~~shares ~~informs~~were ~~that~~issued and subscribed, ~~following~~of ~~today’s~~which ~~share~~(i) 58,500 ~~swap~~shares ~~agreement~~regarding ~~between~~the ~~Mediobanca and Enel’s wholly~~Stock-~~owned~~option ~~subsidiary~~Plan ~~Enel~~for ~~Energy~~the ~~Europe~~year ~~S.r.l.~~2002, (~~EEE~~ii) ~~whose~~ 152,037 ~~underlying~~shares ~~security~~regarding isthe ~~represented~~Stock-option Plan byfor athe ~~maximum~~year of2003 31and (iii) 320,500~~,000~~ shares ofregarding ~~Endesa,~~the Stock-option Plan for the ~~total~~year 2004. ~~number~~The Board of ~~Endesa’s~~Directors ~~shares~~had ~~underlying~~been ~~the~~specifically ~~share~~authorized ~~swap~~to ~~transactions~~resolve ~~carried~~such ~~out~~capital increases by ~~EEE~~the extraordinary ~~(for~~Shareholders’ ~~which EEE~~Meetings ~~has~~of ~~already~~May 25, ~~obtained~~2001 ~~financing~~(regarding ~~sources)~~the isStock-option ~~equal~~Plan tofor ~~158~~the year 2002),~~601~~ May 23,~~597~~ 2003 (~~equal~~regarding tothe ~~14.98%~~Stock-option ofPlan for the ~~share~~year 2003) and May 21, 2004 (regarding ~~capital~~the ofStock-option ~~Endesa~~Plan for the year 2004).

~~EEE~~The ~~already~~attestation ~~owns~~regarding ~~105,800,000~~the ~~shares~~new amount of ~~Endesa~~the ~~(equal~~share tocapital ~~9.99%~~was offiled for recording with the register ~~relevant~~of ~~share~~companies ~~capital)~~in Rome on March 13, 2007.

Current share capital

Previous share capital

Euro

N. of shares

Par value

Euro

N. of shares

Par value

each

Total

6,181,108,564

1 Euro

6,180,577,527

1 Euro

Of which:

Ordinary shares

6,181,108,564

1 Euro

6,180,577,527

1 Euro

(rank for dividend pari passu: January 1, 2006) current coupon number 9

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, thereunto duly authorized.


Enel Società per Azioni

By:	/s/ Avv. Claudio Sartorelli

	Name:	Avv. Claudio Sartorelli
	Title:	Secretary of Enel Società per Azioni

Dated: March 1223, 2007

Table of Contents

Table of Contents

Table of Contents

Table of Contents

Table of Contents

Filing Compare · ENEL SOCIETA PER AZIONI