{"data":[{"id":4,"issuer_id":3,"issuer_name":"Itaú Unibanco Holding S.A.","isins":["US46556M2A90","US46556MAM47","US46556W2E95","XS2646201983","XS2865543693","XS3018022932"],"event_type":"put_call","filing_type":"6-K","filing_date":"2026-03-30T00:00:00.000Z","effective_date":null,"accession_number":"000113259726000081","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1132597&type=6-K","headline":"6-K 1 a6-k_itubx03272026.htm 6-K Document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C","summary":"6-K filed 2026-03-30. Event: put_call. Items: N/A.","raw_excerpt":"6-K 1 a6-k_itubx03272026.htm 6-K Document UNITED STATES 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, 2026 Comission 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 Conceição CEP 04344-902 São Paulo, SP, Brazil (Address of principal executive office) 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 ☒        Form 40-F ☐ 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 ☐   No ☒ Indicate by check ma","created_at":"2026-05-22T20:47:54.012Z","updated_at":"2026-05-22T20:47:54.012Z","ticker":"ITUB","country":"BR","sector":"Financials"},{"id":1,"issuer_id":15,"issuer_name":"Gerdau S.A.","isins":[],"event_type":"tender","filing_type":"6-K","filing_date":"2025-06-10T00:00:00.000Z","effective_date":"2025-06-09T00:00:00.000Z","accession_number":"000110465925057949","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1073404&type=6-K","headline":"6-K 1 tm2517577d1_6k.htm FORM 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C","summary":"6-K filed 2025-06-10. Event: tender. Items: N/A.","raw_excerpt":"6-K 1 tm2517577d1_6k.htm FORM 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 For the month of June 2025 Commission File Number: 001-14878 GERDAU S.A. Av. Dra. Ruth Cardoso, 8501, 8th floor 05425-070 São Paulo, São Paulo Federative Republic of Brazil (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 if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨ 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): ¨ Announcement by Gerdau S.A. of Results of Cash Tender Offer for Any and All Outstanding 4.875% Notes due 2027 issued by Gerdau Trade Inc. S&a","created_at":"2026-05-22T20:46:37.260Z","updated_at":"2026-05-22T20:46:37.260Z","ticker":"GGB","country":"BR","sector":"Industrials"},{"id":2,"issuer_id":15,"issuer_name":"Gerdau S.A.","isins":[],"event_type":"tender","filing_type":"6-K","filing_date":"2025-06-09T00:00:00.000Z","effective_date":null,"accession_number":"000110465925057800","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1073404&type=6-K","headline":"6-K 1 tm2517529d1_6k.htm FORM 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C","summary":"6-K filed 2025-06-09. Event: tender. Items: N/A.","raw_excerpt":"6-K 1 tm2517529d1_6k.htm FORM 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 For the month of June 2025 Commission File Number: 001-14878 GERDAU S.A. Av. Dra. Ruth Cardoso, 8501, 8th floor 05425-070 São Paulo, São Paulo Federative Republic of Brazil (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 if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨ 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): ¨ Announcement by Gerdau S.A. of Consideration for Cash Tender Offer for Any and All Outstanding 4.875% Notes due 2027 issued by Gerdau","created_at":"2026-05-22T20:46:37.385Z","updated_at":"2026-05-22T20:46:37.385Z","ticker":"GGB","country":"BR","sector":"Industrials"},{"id":3,"issuer_id":15,"issuer_name":"Gerdau S.A.","isins":[],"event_type":"maturity","filing_type":"6-K","filing_date":"2025-06-05T00:00:00.000Z","effective_date":null,"accession_number":"000110465925056535","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1073404&type=6-K","headline":"6-K 1 tm2517162d2_6k.htm FORM 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C","summary":"6-K filed 2025-06-05. Event: maturity. Items: N/A.","raw_excerpt":"6-K 1 tm2517162d2_6k.htm FORM 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934 For the month of June 2025 Commission File Number: 001-14878 GERDAU S.A. Av. Dra. Ruth Cardoso, 8501, 8th floor 05425-070 São Paulo, São Paulo Federative Republic of Brazil (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 if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨ 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): ¨ GERDAU S.A. CNPJ No. 33.611.500/0001-19 NIRE No. 35300520696 Publicly-held company NOTICE TO THE MARKET Gerdau S.A. (B3: GGBR / NYSE: GGB) (&","created_at":"2026-05-22T20:46:37.503Z","updated_at":"2026-05-22T20:46:37.503Z","ticker":"GGB","country":"BR","sector":"Industrials"},{"id":9,"issuer_id":18,"issuer_name":"Nexa Resources S.A.","isins":[],"event_type":"tender","filing_type":"6-K","filing_date":"2025-04-07T00:00:00.000Z","effective_date":null,"accession_number":"000129281425001376","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1713930&type=6-K","headline":"6-K 1 nexa20250404_6k.htm 6-K U.S","summary":"6-K filed 2025-04-07. Event: tender. Items: N/A.","raw_excerpt":"6-K 1 nexa20250404_6k.htm 6-K U.S. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the Month of April 2025 Nexa Resources S.A. (Exact Name as Specified in its Charter) N/A (Translation of Registrant’s Name) 37A, Avenue J.F. Kennedy L-1855, Luxembourg Grand Duchy of Luxembourg (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 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): ____ 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): ____ Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to th","created_at":"2026-05-22T20:48:30.006Z","updated_at":"2026-05-22T20:48:30.006Z","ticker":"NEXA","country":"BR","sector":"Basic Materials"},{"id":10,"issuer_id":18,"issuer_name":"Nexa Resources S.A.","isins":[],"event_type":"tender","filing_type":"6-K","filing_date":"2025-03-31T00:00:00.000Z","effective_date":null,"accession_number":"000129281425001242","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1713930&type=6-K","headline":"6-K 1 nexa20250330_6k.htm 6-K U.S","summary":"6-K filed 2025-03-31. Event: tender. Items: N/A.","raw_excerpt":"6-K 1 nexa20250330_6k.htm 6-K U.S. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the Month of March 2025 Nexa Resources S.A. (Exact Name as Specified in its Charter) N/A (Translation of Registrant’s Name) 37A, Avenue J.F. Kennedy L-1855, Luxembourg Grand Duchy of Luxembourg (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 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): ____ 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): ____ Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to th","created_at":"2026-05-22T20:48:30.118Z","updated_at":"2026-05-22T20:48:30.118Z","ticker":"NEXA","country":"BR","sector":"Basic Materials"},{"id":5,"issuer_id":3,"issuer_name":"Itaú Unibanco Holding S.A.","isins":["US46556M2A90","US46556MAM47","US46556W2E95","XS2646201983","XS2865543693","XS3018022932"],"event_type":"put_call","filing_type":"6-K","filing_date":"2025-03-18T00:00:00.000Z","effective_date":null,"accession_number":"000129281425000952","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1132597&type=6-K","headline":"6-K 1 itub20250317_6k.htm 6-K FORM 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C","summary":"6-K filed 2025-03-18. Event: put_call. Items: N/A.","raw_excerpt":"6-K 1 itub20250317_6k.htm 6-K FORM 6-K UNITED STATES 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, 2025 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 Conceicao CEP 04344-902 São Paulo, SP, Brazil (Address of principal executive office) 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 ☒ Form 40-F ☐ 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 ☐ No ☒ Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Reg","created_at":"2026-05-22T20:47:54.129Z","updated_at":"2026-05-22T20:47:54.129Z","ticker":"ITUB","country":"BR","sector":"Financials"},{"id":6,"issuer_id":3,"issuer_name":"Itaú Unibanco Holding S.A.","isins":["US46556M2A90","US46556MAM47","US46556W2E95","XS2646201983","XS2865543693","XS3018022932"],"event_type":"put_call","filing_type":"6-K","filing_date":"2024-10-01T00:00:00.000Z","effective_date":null,"accession_number":"000129281424003618","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1132597&type=6-K","headline":"6-K 1 itub20240930_6k1.htm 6-K FORM 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C","summary":"6-K filed 2024-10-01. Event: put_call. Items: N/A.","raw_excerpt":"6-K 1 itub20240930_6k1.htm 6-K FORM 6-K UNITED STATES 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 September, 2024 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 Conceicao CEP 04344-902 São Paulo, SP, Brazil (Address of principal executive office) 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 ☒ Form 40-F ☐ 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 ☐ No ☒ Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted b","created_at":"2026-05-22T20:47:54.243Z","updated_at":"2026-05-22T20:47:54.243Z","ticker":"ITUB","country":"BR","sector":"Financials"},{"id":7,"issuer_id":3,"issuer_name":"Itaú Unibanco Holding S.A.","isins":["US46556M2A90","US46556MAM47","US46556W2E95","XS2646201983","XS2865543693","XS3018022932"],"event_type":"put_call","filing_type":"6-K","filing_date":"2024-05-28T00:00:00.000Z","effective_date":null,"accession_number":"000129281424002208","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1132597&type=6-K","headline":"6-K 1 itub20240527_6k1.htm 6-K FORM 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C","summary":"6-K filed 2024-05-28. Event: put_call. Items: N/A.","raw_excerpt":"6-K 1 itub20240527_6k1.htm 6-K FORM 6-K UNITED STATES 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 May, 2024 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 Conceicao CEP 04344-902 São Paulo, SP, Brazil (Address of principal executive office) 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 ☒ Form 40-F ☐ 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 ☐ No ☒ Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regu","created_at":"2026-05-22T20:47:54.357Z","updated_at":"2026-05-22T20:47:54.357Z","ticker":"ITUB","country":"BR","sector":"Financials"},{"id":11,"issuer_id":18,"issuer_name":"Nexa Resources S.A.","isins":[],"event_type":"tender","filing_type":"6-K","filing_date":"2024-04-08T00:00:00.000Z","effective_date":null,"accession_number":"000129281424001249","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1713930&type=6-K","headline":"6-K 1 nexa20240405_6k.htm FORM 6-K   U.S","summary":"6-K filed 2024-04-08. Event: tender. Items: N/A.","raw_excerpt":"6-K 1 nexa20240405_6k.htm FORM 6-K   U.S. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K   REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the Month of April 2024 Nexa Resources S.A. (Exact Name as Specified in its Charter)        N/A        (Translation of Registrant’s Name) 37A, Avenue J.F. Kennedy L-1855, Luxembourg Grand Duchy of Luxembourg (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       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): ____ Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T","created_at":"2026-05-22T20:48:30.230Z","updated_at":"2026-05-22T20:48:30.230Z","ticker":"NEXA","country":"BR","sector":"Basic Materials"},{"id":12,"issuer_id":18,"issuer_name":"Nexa Resources S.A.","isins":[],"event_type":"tender","filing_type":"6-K","filing_date":"2024-04-01T00:00:00.000Z","effective_date":null,"accession_number":"000129281424001136","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1713930&type=6-K","headline":"6-K 1 nexa20240331_6k1.htm FORM 6-K U.S","summary":"6-K filed 2024-04-01. Event: tender. Items: N/A.","raw_excerpt":"6-K 1 nexa20240331_6k1.htm FORM 6-K U.S. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the Month of April 2024 Nexa Resources S.A. (Exact Name as Specified in its Charter) N/A (Translation of Registrant’s Name) 37A, Avenue J.F. Kennedy L-1855, Luxembourg Grand Duchy of Luxembourg (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 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): ____ 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): ____ Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information","created_at":"2026-05-22T20:48:30.341Z","updated_at":"2026-05-22T20:48:30.341Z","ticker":"NEXA","country":"BR","sector":"Basic Materials"},{"id":8,"issuer_id":3,"issuer_name":"Itaú Unibanco Holding S.A.","isins":["US46556M2A90","US46556MAM47","US46556W2E95","XS2646201983","XS2865543693","XS3018022932"],"event_type":"put_call","filing_type":"6-K","filing_date":"2024-03-25T00:00:00.000Z","effective_date":null,"accession_number":"000129281424000978","edgar_url":"https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1132597&type=6-K","headline":"6-K 1 itub20240322_6k1.htm 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C","summary":"6-K filed 2024-03-25. Event: put_call. Items: N/A.","raw_excerpt":"6-K 1 itub20240322_6k1.htm 6-K UNITED STATES 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, 2024 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 Conceicao CEP 04344-902 São Paulo, SP, Brazil (Address of principal executive office) 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 ☒ Form 40-F ☐ 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 ☐ No ☒ Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation ","created_at":"2026-05-22T20:47:54.470Z","updated_at":"2026-05-22T20:47:54.470Z","ticker":"ITUB","country":"BR","sector":"Financials"}],"total":12,"page":1,"per_page":50,"pages":1,"last_checked":"2026-05-22T20:49:41.678Z","generated_at":"2026-05-22T22:33:08.292Z"}