6-K

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 March 2011

Commission File Number: 001-15276

Itaú Unibanco Holding S.A.

(Exact name of registrant as specified in its charter)

Itaú Unibanco Holding S.A.

(Translation of Registrant’s Name Into English)

Praça Alfredo Egydio de Souza Aranha, 100-Torre Itaúsa

04344-902 São Paulo, SP, Brazil

(Address of principal executive offices)

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

Form 20-F:  x      Form 40-F:   o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Yes:   o      No:   x

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Yes:   o      No:   x

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

Yes:   o      No:   x

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

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.

	Itaú Unibanco Holding S.A.
		(Registrant)
Date:  March 29, 2011	By:	/s/ Alfredo Egydio Setubal
		Name:	Alfredo Egydio Setubal
		Title:	Investor Relations Officer

By:	/s/ Caio Ibrahim David
	Name:	Caio Ibrahim David
	Title:	Chief Financial Officer

 

EXHIBIT INDEX

99.1 Announcement to the Market: Convergence to International Accountability Standards - IFRS.

EX-99.1

ANNOUNCEMENT TO THE MARKET

Convergence to International Accountability Standards – IFRS

Itaú Unibanco presents the major changes in our consolidated financial statements resulting from the adoption of IFRS – International Financial Reporting Standards, according to National Monetary Council Resolution 3,786, which requires that as of December 31, 2010, the bank must also report its consolidated financial statements according to IFRS criteria.

This information was shared with Itaúsa – Investimentos Itaú S.A. to be part of their consolidated financial statements for the year 2010, according to IFRS and in line with the instructions CVM–457/07 and CVM–485/10.

R$ million

Comparison between BRGAAP1 and IFRS
Balance Sheet	BRGAAP			Adjustments2		IFRS		BRGAAP		Adjustments2		IFRS
				12/31/2009						12/31/2010
Total Assets		608,273		(29,669	)	578,604		755,112		(27,631	)	727,481
Cash and Deposits on Demand, Compulsory, Interbank Deposits, Securities under repurchase agreements, Financial Assets and Derivatives		283,847		(443	)	283,404		371,048		(294	)	370,754
Loans Operations		245,951		(888	)	245,063		297,102		(1,615	)	295,487
(-) Allowance for Loan Losses 3		(24,052	)	3,807		(20,245	)	(22,292	)	2,298		(19,994	)
Other Financial Assets 4		55,101		(28,360	)	26,741		63,171		(22,438	)	40,733
Tax Assets 5		31,457		(4,773	)	26,684		29,265		(5,374	)	23,891
Investments in Unconsolidated Companies, Fixed and Intangible Assets, Assets Held for Sale and Other Assets		15,969		988		16,957		16,818		(208	)	16,610
Total Liabilities		554,050		(34,526	)	519,524		690,502		(30,963	)	659,539
Deposits		190,772		(56	)	190,716		202,738		(50	)	202,688
Deposits Received Under Securities Repurchase Agreements		131,934		12		131,946		199,641		16		199,657
Trading Liabilities, Derivatives, Funding from Interbank and fromInstitutional		79,526		1,721		81,247		112,556		1,562		114,118
Other Financial Liabilities 4		54,984		(27,957	)	27,027		63,545		(22,533	)	41,012
Reserves for Insurance, Private Pension and Capitalization		52,404		(2,198	)	50,206		61,365		(1,898	)	59,467
Provisions and Other Liabilities		30,568		(1,967	)	28,601		33,190		(2,778	)	30,412
Tax Liabilities 5		13,862		(4,081	)	9,781		17,467		(5,282	)	12,185
Total Stockholders’ Equity		54,223		4,857		59,080		64,610		3,332		67,942
Controlling Stockholders’ Equity		50,683		6,833		57,516		60,879		5,386		66,265
Minority Stockholders’ Equity		3,540		(1,976	)	1,564		3,731		(2,054	)	1,677

1 BRGAAP represents the accounting practices adopted in Brazil for financial institutions, according to regulation of the Brazilian Central Bank;

2 Resulted from deconsolidation of companies, reclassifications between assets and liabilities and other effects from IFRS adoption;

3 Implementation of the criteria for calculating the Allowance for Loan Losses as defined in IFRS model;

4 Change in accounting for Foreign Exchange Portfolio, which started to be considered as a net effect of Assets and Liabilities;

5 Change in accounting for deferred taxes, which are now treated as a net effect of Assets and Liabilities in each of the consolidated companies.

Itaú Unibanco presents bellow the reconciliation of net income and equity for the years 2010 and 2009, and the conceptual description of the major adjustments.

R$ million

Reconciliation
Adjustments	Equity		Net Income		Equity		Net Income
	12/31/2009		2009		12/31/2010		2010
BRGAAP	50,683		10,067		60,879		13,323
(1) Allowance for Loan Losses	3,443		490		2,014		(1,430	)
(2) Recognition of total deferred tax assets	2,367		(305	)	1,724		(659	)
(3) Pension and health care plans	1,410		-		-		-
(4) Adjustment to market value of shares and quotas	970		-		1,165		-
(5) Acquisition of interest in Porto Seguro Itaú Unibanco Participações S.A.	936		936		896		(40	)
(6) Provision for Itaú Unibanco merger expenses	844		(488	)	-		(844	)
(7) Conversion of subsidiaries and unconsolidated companies abroad	-		828		-		256
(8) Provision for dividends payable not declared	-		-		1,307		-
Other adjustments	(272	)	665		(99	)	268
Income tax and social contribution on all IFRS adjustments	(2,865	)	(354	)	(1,621	)	834
IFRS	57,516		11,838		66,265		11,708

Reconciliation
Adjustment	Convergence effect to IFRS
(1)  Allowance for Loan Losses (IAS 39)	According to IAS 39, loan losses allowances must be made when there is objective evidence that loan operations have suffered a reduction in its value (impairment).
(2)  Recognition of total deferred tax assets (IAS 12)	Recognition in the consolidated financial statements of the full tax credit related to the Social Contribution on Net Income at the rate of 15%.
(3)  Pension and health care plans (IAS 19)	All accumulated actuarial gains and losses, until the transition date, were recognized.
4)  Adjustment to market value of shares and quotas(IAS 39 and 32)	The stocks and quotas classified as permanent investment were measured at fair value and its gains and losses were recorded directly on Equity, with no impact on the income statement of the period.
(5)  Acquisition of interest in Porto Seguro Itaú Unibanco Participações S.A.	Effect of accounting at fair value the aquisition of the participation in Porto Seguro Itaú Unibanco Participações S.A.
(6)  Provision for Itaú Unibanco merger expenses(IAS 19 and 37)	The provision for Itaú Unibanco association expenses was reversed in the Consolidated Financial Statements.
(7)  Conversion of subsidiaries and unconsolidated companies abroad (IAS 21)	Exchange rate variations of subsidiaries and nonconsolidated companies abroad, where the functional currency (defined as the currency of the primary economic environment on which each entity operates) differs from the Real, started to be recorded directly on Equity with no impact on the income statement of the period.
(8)  Provision for dividends payable not declared (IAS 10)	The provision for non declared payable dividends was reversed in the amount exceeding the value of the mandatory minimum dividends.

The complete consolidated financial statements under IFRS for the year 2010 will be released until 04/05/2011 at our website: 
www.itau-unibanco.com/ir.

São Paulo, march 29, 2011.

Itaú Unibanco Holding S.A.

Alfredo Egydio Setubal

Investor Relations Officer