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~~PURSUANT ~~the~~TO ~~month~~RULE of13a-16 ~~February~~OR ~~2026~~15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of February, 2026

Commission File Number: 001-38049

Azul S.A. ~~(Name of Registrant)~~

~~Edifício Jatobá, 8th Floor, Condomínio Castelo Branco Office Park Avenida Marcos Penteado de Ulhôa Rodrigues, No. 939 Tamboré, Barueri, SP, 06460-040, Brazil +55~~ (~~11) 4831~~Name ~~2880 (Address~~ of ~~Principal Executive Office~~Registrant)

Edifício Jatobá, 8th floor, Castelo Branco Office Park

Avenida Marcos Penteado de Ulhôa Rodrigues, 939

Tamboré, Barueri, São Paulo, SP 06460-040, Brazil.

+55 (11) 4831 2880

(Address of Principal Executive Office)

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

~~Subscription~~Material ~~Warrants~~Fact February | 2026

~~On February 20, 2026,~~ Azul ~~S.A.~~reports ~~(the~~unaudited ~~“Company”)~~monthly financial ~~furnished~~information to the ~~Securities~~US and Exchange Commission a Form 6-K dated February 19, 2026 disclosing a material fact announcement entitled “Board of Directors Approves Issuance of Subscription Warrants and Elects Members of the Strategy Committee”.Court

~~Approval~~São byPaulo, February 23, 2026 – Azul S.A., “Azul” (B3:AZUL53, OTC:AZULQ), presented today its monthly operating reports, containing certain financial information for the ~~Board~~period offrom ~~Directors~~December of1, 2025, to December 31, 2025, to the ~~Company~~ United States Bankruptcy Court for the Southern District of New York, as required during its previously announced Chapter 11 process. The monthly operating report includes items such as cash position, revenue, and profit and loss for the ~~Issuance~~period mentioned above for each of ~~Subscription~~Azul’s ~~Warrants~~subsidiaries that are subject to the voluntary Chapter 11 process in the United States.

AsAdditionally, the Company disclosed inon this date preliminary and unaudited consolidated financial information for the ~~above-mentioned~~period ~~Form~~from ~~6-K~~December 1, on2025 ~~February 19~~to December 31, ~~2026~~2025, with the ~~board~~aim of ~~directors~~keeping of the market ~~Company~~informed (about the ~~“Board~~evolution of ~~Directors”)~~its ~~approved~~financial ~~the~~and ~~issuance~~operational ofperformance throughout its restructuring process.

(a) subscription warrants to be sold to American Airlines, Inc. (or one of its affiliates), which, if exercised, will grant the right to subscribe for up to 4,862,260,835,197 common shares issued by the Company (“American Subscription Warrants”), with the exercise of such American Subscription Warrants being subject to certain conditions precedent, including prior approval by the Administrative Council for Economic Defense – CADE;

Highlights (R$ million)	Dec-25
Total operating revenue¹	2,081.9
Adjusted EBITDA¹	801.9
Adjusted EBITDA margin (%)¹	38.5%
Operating income¹	546.4
Operating margin (%)¹	26.2%
Cash, cash equivalents and short-term investments	1,017.93
Accounts receivable	2,725.96

~~(b)~~¹Results ~~subscription~~were ~~warrants~~adjusted ~~to be sold~~ for ~~the~~one-time and ~~benefit~~non-recurring ~~of the Company’s unsecured creditors (as defined in the Company’s Chapter 11 plan of reorganization (the “Plan”))~~items, ~~which,~~primarily ifrelated ~~exercised, will grant the right~~ to ~~subscribe for up to 1,231,164,424,677 common shares issued by the Company (“Unsecured Creditors Subscription Warrants”); and~~restructuring

~~(c)~~The ~~subscription warrants to be sold to United Airlines, Inc. (or one of its affiliates) and to certain creditors of the~~ Company, ~~which,~~emphasizes ifthat ~~exercised,~~such will grant the right to subscribe for up to 1,215,565,208,799 common shares issued by the Company (“Additional Subscription Warrants” and, together with the American Subscription Warrants and the Unsecured Creditors Subscription Warrants, the “Subscription Warrants”).information:

~~Terms~~· are preliminary and ~~Conditions~~have ofnot ~~the~~been ~~Subscription~~audited ~~Warrants~~by its independent auditors;

An· ~~English~~were ~~language~~prepared ~~translation~~exclusively offor the ~~terms~~purpose ~~and conditions~~ of ~~the~~complying ~~American Subscription~~with ~~Warrants, which were approved by~~ the ~~Board~~requirements of ~~Directors~~Chapter as11, ~~the~~according ~~Subscription~~to ~~Warrants~~practices —and ~~Series~~criteria 1established ofby the ~~Company,~~United ~~is attached~~States ~~hereto~~rules asapplicable ~~Exhibit~~to ~~99.1.~~that process; and

An· ~~English~~should ~~language~~not ~~translation~~be ofdirectly ~~the~~compared ~~terms~~to ~~and conditions of~~ the ~~Unsecured Creditors~~regular ~~Subscription~~financial ~~Warrants,~~statements ~~which~~previously ~~were~~disclosed ~~approved~~ by ~~the Board of Directors as the Subscription Warrants — Series 2 of the Company, is attached hereto as Exhibit 99~~Azul.2.

AnAs ~~English~~Azul ~~language~~works ~~translation~~to ofcomplete ~~the~~its ~~terms~~restructuring ~~and conditions of~~ process, the ~~Additional Subscription~~Company ~~Warrants,~~will ~~which~~issue ~~were~~a ~~approved~~press byrelease ~~the~~in ~~Board~~connection ofwith ~~Directors~~each asmonthly ~~the~~operating ~~Subscription~~report ~~Warrants~~filed —with ~~Series 3 of~~ the ~~Company, is attached hereto as Exhibit 99~~Court.3.

~~Preemptive~~Azul ~~Rights~~will continue to disclose quarterly financial statements revised by our auditors and annual financial statements audited according to CVM and SEC rules.

~~Pursuant~~Communication ~~to Article 171, paragraph 3, of the Brazilian Corporations Law~~ and ~~the~~Transparency Company’s bylaws, the Company’s shareholders shall have a preemptive right to subscribe for the Subscription Warrants (the “Preemptive Rights”). The approval of the issuance of the Subscription Warrants by the Board of Directors has a record date of February 20, 2026. Accordingly, 30-day period for the exercise of the Preemptive Rights with ~~respect to the Subscription~~ ~~Warrants shall commence as of February 23, 2026 and shall end on March 25, 2026 (~~the ~~“Preemptive Rights Exercise Period”).~~Market

AsAzul ~~set~~will ~~forth~~keep inits ~~Exhibit 99.1~~shareholders, ~~99.2 and 99.3~~customers, ~~the number of Subscription~~Crewmembers, ~~Warrants to be issued by the Company shall be variable~~ and ~~shall correspond to~~ the ~~total~~market ~~number~~informed of ~~Subscription~~all ~~Warrants~~material ~~subscribed~~developments ~~for, taking~~in ~~into account (i)~~ the ~~subscriptions~~restructuring byprocess, ~~the~~in ~~respective~~full ~~purchasers~~compliance ~~indicated~~with ~~above (up to the~~ applicable ~~limit~~laws and ~~as contemplated in the Plan and related documents) and (ii) the subscriptions by the Company’s shareholders entitled to exercise their Preemptive Rights during the Preemptive Rights Exercise Period~~regulations.

InStakeholders ~~view of the fact that, pursuant to the Plan, the shareholders subject~~seeking tospecific ~~the~~information ~~Plan~~about ~~are~~Azul’s ~~prevented~~Chapter ~~from~~11 ~~exercising~~case ~~their~~can ~~Preemptive~~visit ~~Rights~~its indedicated ~~the~~website ~~subscription~~at ~~of the Subscription Warrants, the maximum issuance~~www.azulmaisforte.com.br. ~~limits~~For ~~(as~~case ~~described~~and inclaims ~~the~~information, ~~section~~please ~~“Quantity~~visit ~~of Subscription Warrants” within each of Exhibit 99~~https://cases.~~1, 99~~stretto.2com/Azul ~~and~~or call ~~99.3~~(833) ~~were~~ ~~established~~888-8055 ~~by the Company so as to accommodate~~ (itoll-free) ~~the~~or ~~subscriptions by the purchasers indicated above and~~ (ii949) ~~the~~556-3896 ~~potential subscription, upon exercise of the Preemptive Rights, of the remaining portion of the share capital whose holders are entitled to exercise such right~~(international).

~~Upon~~About ~~the~~Azul expiration of the Preemptive Rights Exercise Period, the Company shall determine the subscriptions received and set the final number of Subscription Warrants to be issued, limited to the amount subscribed, provided that any unsubscribed portion shall not be issued.

~~Notice~~Azul S.A. (B3: AZUL53; OTC: AZULQ), the largest airline in Brazil in terms of cities served, offers more than 800 daily flights to 137 destinations. With an operational fleet of around 200 aircraft and over 14,000 crew members, the company operates a network of 250 direct routes. Azul was named by Cirium (a leading aviation data analytics company) as the 2nd most punctual airline in the world in 2023. In 2020, Azul was awarded as the best airline in the world by TripAdvisor, marking the first time a Brazilian airline achieved first place in the Traveller's Choice Awards. For more information visit ri.voeazul.com.br/en/.

The offering and issuance of the Subscription Warrants, including any Subscription Warrants to be issued pursuant to the exercise of Preemptive Rights, has not been and will not be registered under the Securities Act of 1933, as amended (the “Securities Act”) or under any other federal or state securities laws of the United States. The Subscription Warrants, and any common shares to be issued by the Company upon the exercise of the Subscription Warrants, may not be offered, sold, pledged or otherwise transferred within the United States or to, or for the account or benefit of, U.S. persons (as defined in Regulation S under the Securities Act), except pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act.Contact:

~~EXHIBIT~~Investor ~~INDEX~~Relations Tel: +55 11 4831 2880 invest@voeazul.com.br Media Relations Tel: +55 11 98196-1035 imprensa@voeazul.com.br

Exhibit	Description of Exhibit
99.1	Terms and Conditions of the Subscription Warrants — Series 1
99.2	Terms and Conditions of the Subscription Warrants — Series 2
99.3	Terms and Conditions of the Subscription Warrants — Series 3

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: February 2324, 2026

Azul S.A.

                                                                                                                By:   /s/ Alexandre Wagner Malfitani
                                                                                                                Name: Alexandre Wagner Malfitani
                                                                                                                Title: Chief Financial Officer

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