Notes and other explanatory information [abstract]

Schedule of changes in deferred tax assets and liability


	Notes	Assets	Liabilities	Deferred taxes, net
Balance as of December 31, 2024		8,244	445	7,799
Effect in income statement		(112)	17	(129)
Other comprehensive income		2	7	(5)
Transfer between assets and liabilities		(103)	(103)	–
Translation adjustment		954	56	898
Transfer to held for sale (Energy Assets)	15(a)	(10)	(295)	285
Balance as of June 30, 2025		8,975	127	8,848

Balance as of December 31, 2023		9,565	870	8,695
Effect in income statement		873	(98)	971
Other comprehensive income		602	15	587
Transfer between assets and liabilities		50	50	–
Translation adjustment		(1,159)	(31)	(1,128)
Balance as of June 30, 2024		9,931	806	9,125

Schedule of uncertain tax positions
	June 30, 2025			December 31, 2024
	Assessed (i)	Potential (ii)	Total	Assessed (i)	Potential (ii)	Total
UTPs not recorded on statement of financial position (iii)
Transfer pricing over the exportation of ores to a foreign subsidiary	3,995	1,825	5,820	3,387	1,608	4,995
Expenses of interest on capital	1,499	–	1,499	1,262	–	1,262
Proceeding related to income tax paid abroad	501	–	501	427	–	427
Goodwill amortization	885	76	961	743	62	805
Payments to Renova Foundation	355	398	753	301	351	652
Other	476	–	476	415	–	415
	7,711	2,299	10,010	6,535	2,021	8,556

UTPs recorded on statement of financial position
Deduction of CSLL in Brazil	181	–	181	154	–	154
	181	–	181	154	–	154

(i) Includes the tax effects arising from the reduction of the tax losses and negative basis of the CSLL without fines and interest.

(ii) Includes the principal, without fines and interest.

(iii) Based on the assessment of its internal and external legal advisors, the Company believes that the tax treatment adopted for these matters will be accepted in decisions of the higher courts on last instance.