6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 Or 15d-16 Of

The Securities Exchange Act Of 1934

For the month of December 2025

Commission File Number: 001-14950

ULTRAPAR HOLDINGS INC.

(Translation of Registrant’s Name into English)

Brigadeiro Luis Antonio Avenue, 1343, 9th Floor

São Paulo, SP, Brazil 01317-910

(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):

Yes ________                                                                       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 ________                                                                       No ____X____

ULTRAPAR HOLDINGS INC.

TABLE OF CONTENTS

ITEM

(Minutes of the Meeting of the Board of Directors of Ultrapar Participações S.A., held on December 10th, 2025)

ULTRAPAR PARTICIPAÇÕES S.A.

Publicly Traded Company

MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS

Date, Hour and Place:

December 10th, 2025, at 10 a.m., at ULTRAPAR PARTICIPAÇÕES S.A. (“Company”) headquarters, located at Brigadeiro Luís Antônio Avenue, Nr. 1.343, 9th floor, in the City and State of São Paulo, also contemplating participation through Microsoft Teams.

Members in attendance:

(i) Members of the Board of Directors undersigned; (ii) the Secretary of the Board of Directors, Ms. Denize Sampaio Bicudo; and (iii) Chief Executive Officer, Mr. Rodrigo de Almeida Pizzinatto; (iv) Chief Financial and Investor Relations Officer, Mr. Alexandre Mendes Palhares; and (v) in relation to item 1, other executive officers of the Company, namely, Mrs. Décio de Sampaio Amaral, Fulvius Tomelin, Leonardo Remião Linden and Tabajara Bertelli Costa.

Matter discussed and resolution:

1. The Board members discussed and approved the Company’s Strategic Plan of 2026-2035 and the budget for 2026.

2. The Board of Directors approved the Corporate Policy for the Use of Artificial Intelligence, as proposed by the Executive Board and endorsed by the Audit and Risk Committee.

Notes: The resolutions were approved, with no amendments or qualifications, by all Board members.

There being no further matters to discuss, the meeting was concluded, and these minutes were written, read, passed, and signed by all the Board members present.

MARCOS MARINHO LUTZ – Chairman

JORGE MARQUES DE TOLEDO CAMARGO – Vice-Chairman

FABIO VENTURELLI

FLÁVIA BUARQUE DE ALMEIDA

JOSÉ MAURICIO PEREIRA COELHO

MARCELO FARIA DE LIMA

PETER PAUL LORENÇO ESTERMANN

VÂNIA MARIA LIMA NEVES

DENIZE SAMPAIO BICUDO – Secretary of the Meeting

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.

Date: December 10, 2025

(Minutes of the Meeting of the Board of Directors of Ultrapar Participações S.A., held on December 10, 2025)