UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): ~~April~~July 617, 2026

COLLECTIVE ACQUISITION CORP.

(Exact name of registrant as specified in its charter)

Cayman Islands		001-42607		N/A
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

~~700~~12955 S.Biscayne ~~Rosemary~~Boulevard Suite ~~Avenue,~~200 ~~Suite~~PMB ~~204~~616

~~West Palm Beach~~Miami, FL ~~33401~~ 33181

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (~~917~~561) ~~742~~489-~~1904~~2062

DUNE ACQUISITION CORPORATION II

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Units, each consisting of one Class A ordinary share and three-quarters of one redeemable warrant	~~IPODU~~CCAQU	The Nasdaq Stock Market LLC
Class A ordinary shares, par value $0.0001 per share	~~IPOD~~CCAQ	The Nasdaq Stock Market LLC
Warrants, each whole warrant exercisable for one Class A ordinary share, each at an exercise price of $11.50 per share	~~IPODW~~CCAQW	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 51.0201. ~~Departure~~Entry ofinto ~~Directors~~a orMaterial ~~Certain~~Definitive ~~Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers~~Agreement.

AsOn ~~disclosed~~July in17, 2026, Collective Acquisition Corp.’s, ~~(formerly~~a ~~known~~Cayman asIslands ~~Dune~~exempted ~~Acquisition~~company ~~Corporation II)~~ (the “Company”), ~~definitive~~issued ~~proxy~~an ~~statement~~unsecured ~~filed~~promissory ~~with~~note (the ~~Securities~~“Note”) ~~and~~in ~~Exchange~~the ~~Commission~~principal onamount ~~March~~of 27up to $500,000 ~~2026~~to ~~(File~~Collective ~~No. 001-42607)~~Acquisition Sponsor LLC (the “~~Proxy~~New ~~Statement~~Sponsor”),. ~~effective~~The asNote ofmay ~~April~~be 6,drawn ~~2026,~~down from time to time for costs and expenses reasonably related to the ~~Schedule~~Company’s ~~14F~~initial ~~Change~~business incombination ~~Control~~(the ~~Date~~“Business Combination”). The Note does not bear interest and the principal balance will be payable on the earlier of: (asi) ~~defined~~the indate on which the ~~Proxy~~Company ~~Statement~~consummates its Business Combination and (ii), the ~~existing~~date ~~members~~that the winding up of the ~~board~~Company ofis ~~directors~~effective (~~the~~such earlier date, the “~~Board~~Maturity Date”),. ~~Carter~~In ~~Glatt,~~the ~~Michael~~event ~~Castaldy,~~that ~~Ben~~the ~~Coates,~~Company ~~Jeron~~does ~~Smith~~not ~~and~~consummate ~~Cecil~~a ~~White~~Business Combination, ~~each~~the ~~resigned~~Note aswill be ~~directors~~repaid only from amounts remaining outside of the trust account established in connection with the Company’s ~~and~~initial ~~Elliot~~public ~~Richmond~~offering (the ~~was~~“Trust ~~appointed~~Account”), ~~Chairman~~if ofany. At any time prior to the ~~Board~~Maturity ~~and~~Date, ~~David~~the ~~Bailin~~New ~~and~~Sponsor ~~Jeremy~~has ~~Sziklay~~the ~~were~~right ~~appointed~~(but asnot ~~independent~~the ~~directors~~obligation) to convert all or any portion of the ~~Board~~outstanding principal amount of the Note into private placement warrants of the Company, at a conversion price of $1.00 ~~David~~per ~~Bailin~~warrant. ~~and~~The ~~Jeremy~~Note ~~Sziklay~~is ~~each~~subject ~~serve~~to ascustomary ~~members~~events of default, the ~~Audit~~occurrence ~~Committee~~of certain of which automatically triggers the unpaid principal balance of the Note and all other sums payable with regard to the ~~Compensation~~Note ~~Committee~~becoming immediately due and payable.

~~Item~~The ~~5.03~~issuance ~~Amendments~~of the Note was made pursuant to the ~~Articles~~exemption from registration contained in Section 4(a)(2) of ~~Incorporation~~the orSecurities ~~Bylaws;~~Act ~~Change~~of in1933, ~~Fiscal~~as ~~Year~~amended.

OnThe ~~April~~foregoing ~~21,~~description ~~2026,~~of the ~~shareholders~~Note ofdoes ~~the Company~~not ~~approved~~purport ~~the~~to ~~Name~~be ~~Change~~complete ~~Proposal~~and ~~(as~~is ~~defined~~qualified ~~below)~~in its entirety by reference to the full text of the Note, a copy of which is ~~described~~filed inas ~~more~~Exhibit 10.1 ~~detail~~to inthis ~~Item~~Current ~~5.07~~Report ~~below~~on Form 8-K (and incorporated herein by reference).

InItem ~~connection~~2.03. ~~with~~Creation ~~the~~of ~~Name Change Proposal, the Company adopted~~ a ~~Second~~Direct ~~Amended~~Financial ~~and~~Obligation ~~Restated~~or ~~Memorandum~~an ~~and~~Obligation ~~Articles~~under ofan ~~Association~~Off-Balance ~~(the~~Sheet ~~“Articles”)~~Arrangement ~~reflecting the change~~ of ~~name~~a ~~of the Company from “Dune Acquisition Corporation II” to “Collective Acquisition Corp~~Registrant.~~” with immediate effect. The Articles were filed with the Registrar of Companies in the Cayman Islands.~~

The ~~foregoing~~information ~~description~~included ofin ~~the~~Item ~~Articles~~1.01 isof ~~qualified~~this inCurrent ~~its~~Report ~~entirety~~is incorporated by ~~the~~reference ~~full~~into ~~text~~this ofItem ~~the Articles, which are filed as Exhibit 3~~2.103 ~~hereto~~to ~~and~~the ~~incorporated~~extent byrequired ~~reference~~ herein.

Item 5.0702. ~~Submission~~Departure of ~~Matters~~Directors toor aCertain ~~Vote~~Officers; Election of ~~Security~~Directors; ~~Holders~~Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

OnEffective ~~April~~July 2117, 2026, the ~~Company~~Board ~~held~~of ~~an extraordinary~~Directors ~~general meeting~~ (the “~~Extraordinary General Meeting~~Board”). Anof ~~aggregate~~the ofCompany ~~17,802,405~~approved ~~ordinary~~the ~~shares~~following ~~(representing~~changes ~~88.46% of~~to the Company’s ~~issued~~management: ~~and~~(i) ~~outstanding~~Maximilian ~~ordinary~~Staedtler was ~~shares~~appointed ~~entitled~~ to ~~vote),~~serve ~~consisting~~as ofChief ~~Class~~Financial AOfficer ~~ordinary~~of ~~shares~~the Company, ~~par~~effective ~~value~~July ~~$0.0001 per~~17, ~~share~~2026, and ~~Class~~(ii) BElliot ~~ordinary~~Richmond ~~shares,~~resigned ~~par~~as ~~value~~the ~~$0.0001~~Chief Financial ~~per~~Officer ~~share, held~~ of ~~record~~the asCompany, ofeffective ~~March~~July 1217, 2026,. Mr. Richmond will continue to serve as the ~~record~~Chairman ~~date~~of ~~for~~the Board and the ~~Extraordinary~~Chief ~~General~~Executive ~~Meeting,~~Officer ~~were~~of ~~present~~the ~~either~~Company. inMr. ~~person~~Richmond’s orexisting byarrangements ~~proxy,~~with ~~which~~the ~~constituted~~Company aremain ~~quorum~~unchanged.

~~The~~Mr. ~~Company’s~~Staedtler, ~~issued~~age 34, brings extensive experience in investment banking, capital markets, investing, and ~~outstanding~~corporate ~~ordinary~~development. Mr. Staedtler is a Partner at CCM Capital ~~shares~~Markets asLP, an affiliate of ~~the~~Collective ~~record~~Capital ~~date~~Management. ~~consisted~~Previously, he served as Director of ~~(i) 14~~Corporate and Business Development at AquaFence from 2025 to 2026. Before that,~~482~~ through his consulting practice,~~813~~ ~~Class~~Mr. AStaedtler ~~ordinary~~provided ~~shares~~strategic advisory and fractional ~~(ii) 5~~CFO services to companies in the consumer packaged goods manufacturing and financial technology industries. Earlier,~~750~~ from 2022 to 2025,~~000~~ ~~Class~~he Bwas ~~ordinary~~Managing ~~shares~~Director at 10X Capital, where he advised companies on strategic and capital markets initiatives. ~~for~~Earlier in his career, Mr. Staedtler was a ~~total~~Vice ofPresident 20in the Technology,~~232~~ Media and Telecommunications Investment Banking Group at Goldman Sachs,~~813~~ ~~ordinary~~advising ~~shares~~clients ~~entitled~~on tomergers ~~vote~~and acquisitions, financings, and other strategic transactions.

AtThere ~~the~~are ~~Extraordinary~~no ~~General~~arrangements ~~Meeting,~~or ~~the~~understandings ~~Company’s~~between ~~shareholders~~Mr. ~~voted~~Staedtler onand ~~the~~any ~~following~~other ~~proposals,~~person ~~each~~pursuant ofto which isMr. ~~described~~Staedtler inwas ~~additional~~appointed ~~detail~~as inChief Financial Officer. Mr. Staedtler does not have any family relationships with any of the Company’s ~~Proxy~~directors ~~Statement. Any~~or ~~terms~~executive ~~used~~officers ~~but~~and is not ~~defined~~party ~~herein~~to ~~have~~any ~~the~~transactions ~~meaning~~or ~~ascribed~~proposed transactions required to ~~them~~be indisclosed ~~the~~pursuant ~~Proxy~~to ~~Statement~~Item 404(a) of Regulation S-K.

~~1. The~~Item ~~Name Change Proposal~~9.01. ToFinancial ~~approve, as~~Statements ~~special resolutions, the change of the name of the Company from “Dune Acquisition Corporation II” to “Collective Acquisition Corp.”~~ and ~~an amendment to the Company’s Articles in the form set forth in Annex A to the Proxy Statement, to reflect the change of name of the Company (the “Name Change Proposal”)~~Exhibits. ~~The Name Change Proposal was approved. The final voting tabulation for this proposal was as follows:~~

FOR		AGAINST		ABSTAIN		BROKER NON-VOTES
17,347,982		0		454,423		0

(d) Exhibits

~~2. The~~EXHIBIT Adjournment Proposal. As there were sufficient votes to approve the Name Change Proposal at the time of the Extraordinary General Meeting, the Adjournment Proposal was not required and was not put to a vote.INDEX

Item 9.01 Financial Statements and Exhibits.

Exhibit No.		Description
10.1		Promissory Note issued by Collective Acquisition Corp. in favor of Collective Acquisition Sponsor LLC, dated July 17, 2026
104		Cover Page Interactive Data File (embedded within Inline XBRL document).

~~(d) Exhibits~~1

~~EXHIBIT INDEX~~SIGNATURE

Exhibit No.		Description
3.1		Second Amended and Restated Memorandum and Articles of Association of Collective Acquisition Corp., effective April 21, 2026
104		Cover Page Interactive Data File (embedded within Inline XBRL document).

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 hereunto duly authorized.

1COLLECTIVE ACQUISITION CORP. By: /s/ Elliot Richmond Name: Elliot Richmond Title: Chairman and Chief Executive Officer

~~SIGNATURE~~Dated: July 20, 2026

~~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 hereunto duly authorized.~~2

COLLECTIVE ACQUISITION CORP. By: /s/ Elliot Richmond Name: Elliot Richmond Title: Chairman, Chief Executive Officer and Chief Financial Officer

Dated: April 27, 2026

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