Form 8-K

8-K — Columbus Acquisition Corp/Cayman Islands

Accession: 0001213900-26-107198

Filed: 2026-10-06

Period: 2026-09-30

CIK: 0002028201

SIC: 6770 (BLANK CHECKS)

Item: Submission of Matters to a Vote of Security Holders

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

8-K — ea0307185-8k_columbus.htm (Primary)

EX-99.1 — PRESS RELEASE DATED OCTOBER 1, 2026 (ea030718501ex99-1.htm)

EX-99.2 — PRESS RELEASE DATED OCTOBER 2, 2026 (ea030718501ex99-2.htm)

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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): September

30, 2026

COLUMBUS ACQUISITION CORP

(Exact Name of Registrant as Specified in its

Charter)

Cayman Islands

001-42485

N/A

(State or other jurisdiction

(Commission File Number)

(IRS Employer

of incorporation)

Identification Number)

14 Prudential Tower

Singapore

049712

(Address of principal executive offices)

(+1)

949 899 1827

(Registrant’s telephone number, including

area code)

N/A

(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

☐

Soliciting material pursuant to Rule 14a-12 under

the Exchange Act

☐

Pre-commencement communications pursuant to Rule

14d-2(b) under the Exchange Act

☐

Pre-commencement communications pursuant to Rule

13e-4(c) under the Exchange Act

Indicate by check mark whether the registrant

is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities

Exchange Act of 1934 (17 CFR §240.12b-2).

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. ☐

Securities registered pursuant to Section 12(b)

of the Act:

Title of each class

Trading Symbol

Name of each exchange on which registered

Units, consisting of one ordinary share, $0.0001 par value, and one

Right to acquire one-seventh of one ordinary share

COLAU

The Nasdaq Stock Market LLC

Ordinary shares, par value $0.0001 per share

COLA

The Nasdaq Stock Market LLC

Rights, each whole right to acquire one-seventh of one ordinary share

COLAR

The Nasdaq Stock Market LLC

Item 5.07. Submission of Matters to a Vote of Security Holders.

On September 30, 2026, Columbus Acquisition Corp,

a Cayman Islands exempted company (the “Company” or “CAC”) reconvened its Extraordinary General Meeting of Shareholders

(the “Meeting”), at which the shareholders voted on the proposals as set forth below, each of which is described in more

detail in the definitive proxy statement (the “Proxy Statement”) filed with the U.S. Securities and Exchange Commission (the

“SEC”) on August 19, 2026. Capitalized terms not otherwise defined herein shall have the same meaning ascribed thereto in

the Proxy Statement.

On August 17, 2026, the record date for the Meeting,

there were 4,494,439 ordinary shares of the Company entitled to vote at the Meeting.

As previously disclosed, the Extraordinary General

Meeting, initially scheduled for September 10, 2026, has been adjourned on multiple occasions without conducting any business or submitting

any proposals to shareholders. On September 30, 2026, the Company reconvened the Meeting, at which 3,589,190 (or approximately 79.86 %)

ordinary shares of the Company entitled to vote were represented in the Meeting either in person or by proxy.

The final results for each of the matters submitted to a vote of Company

shareholders at the Meeting are as follows:

1. The NTA Proposal

Shareholders approved the amendment of the CAC

Articles, which currently restricts consummation of a shareholder redemption offer in connection with a business combination if the redemptions

made pursuant to such offer would cause CAC to have net tangible assets of less than US$5,000,001 prior to or upon consummation of a

business combination (the “NTA Requirement”) as set out in Articles 37.2, 37.5, 37.6 and 37.8 of the CAC Articles, in order

to expand the methods that CAC may employ to not become subject to the “penny stock” rules of the SEC, immediately prior

to the Effective Time (as defined in the Plan of Merger) (the “NTA Proposal”).

Approval of the NTA Proposal requires the affirmative

vote of holders of at least two-thirds of the Company’s ordinary shares represented in person (including by virtual attendance)

or by proxy and entitled to vote thereon at the Meeting. The voting results were as follows:

FOR

AGAINST

ABSTAIN

BROKER NON-VOTES

3,588,892

298

2. The Business Combination Proposal

Shareholders

approved and authorize the Business Combination Agreement, dated as of November 9, 2025, as amended on August 6, 2026 (as it may be

further amended, supplemented or otherwise modified from time to time) (the “Business Combination Agreement”), by and among the Company, WISeSat.Space Holdings Corp., a

British Virgin Islands business company (“Pubco”), WISeSat Merger Sub Corp., a Cayman Islands exempted company and a

wholly owned subsidiary of Pubco (“Merger Sub”), WISeSat.Space Corp., a British Virgin Islands business company, WISeKey

International Holding Ltd., a Swiss company, a copy of which is attached to the Proxy Statement as Annex A and Annex A-1, and the

transactions contemplated therein.

Approval of the Business

Combination Proposal requires the affirmative vote of the holders of a majority of the Company’s ordinary shares as of the record

date represented in person (including by virtual presence) or by proxy at the Meeting and entitled to vote thereon. The voting results

were as follows:

FOR

AGAINST

ABSTAIN

BROKER

NON-VOTES

3,407,497

181,693

3. The Merger Proposal

Shareholders approved

and authorize that (a) CAC merge with Merger Sub so that Merger Sub will merge with and into CAC and CAC will be the surviving company

and all the undertaking, property and liabilities of the Merger Sub vest in CAC by virtue of such merger pursuant to the Companies Act

(As Revised); (b) the Plan of Merger substantially in the form annexed to the Proxy Statement as Annex A-2 be and is hereby authorized,

approved and confirmed in all respects and CAC be authorized to enter into the Plan of Merger; (c) that upon the Effective Time (as defined

in the Plan of Merger): (i) the amending and restating of the memorandum and articles of CAC as the surviving company of the Merger is

approved in all respects, (ii) the board of directors and executive officers of CAC resign and the board of directors and the executive

officers of Merger Sub immediately prior to the Effective Time become the board of directors and executive officers of the Surviving

Company; and (iii) the authorized share capital of CAC (as the surviving company of the Merger) shall be amended such that firstly, all

authorized preference shares of par value US$0.0001 each shall be redesignated as authorized ordinary shares of a par value of US$0.0001

each, such that the authorized share capital of CAC (as the surviving company of the Merger) shall be US$50,000 divided into 500,000,000

ordinary shares of a par value of US$0.0001 each (the “Redesignation”); secondly, upon the Redesignation becoming effective,

the authorized share capital of CAC (as the surviving company of the Merger) shall be consolidated and divided at a ratio of 100 for

1 so as to become US$50,000 divided into 5,000,000 ordinary shares of a par value of $0.01 each (the “Share Consolidation”);

and thirdly (iii) upon the Share Consolidation becoming effective, the authorized share capital of CAC (as the surviving company of the

Merger) shall be decreased from $50,000 divided into 5,000,000 ordinary shares of a par value of $0.01 each to $1 divided into 100 ordinary

shares of a par value of $0.01 each by the cancellation of 4,999,900 authorized but unissued ordinary shares of a par value of $0.01

each.

Approval of the Nasdaq

Proposal requires the affirmative vote of two-thirds of the issued and outstanding ordinary shares of the Company as of the record date

represented in person (including by virtual presence) or by proxy at the Meeting and entitled to vote and voted thereon . The voting

results were as follows:

FOR

AGAINST

ABSTAIN

BROKER NON-VOTES

3,407,497

181,693

4. The Pubco Equity

Plan Proposal

Shareholders approved

the adoption of a new equity incentive plan (the “Pubco Equity Plan”) by Pubco. A copy of the Pubco Equity Plan is attached

to the Proxy Statement as Annex D.

Approval of the Pubco

Equity Plan Proposal requires the affirmative vote of the holders of a majority of the Company’s ordinary shares as of the record

date represented in person (including by virtual presence) or by proxy at the Meeting and entitled to vote thereon. The voting results

were as follows:

FOR

AGAINST

ABSTAIN

BROKER NON-VOTES

3,407,497

181,693

5. The ESPP Proposal

Shareholders approved

the adoption of an employee share purchase program (the “Employee Share Purchase Program”) by Pubco. A copy of the Employee

Share Purchase Program is attached to the Proxy Statement as Annex E

Approval of the ESPP

Proposal requires the affirmative vote of the holders of a majority of the Company’s ordinary shares as of the record date represented

in person (including by virtual presence) or by proxy at the Meeting and entitled to vote thereon. The voting results were as follows:

FOR

AGAINST

ABSTAIN

BROKER NON-VOTES

3,407,795

181,395

6. The Nasdaq Proposal

Shareholders approved,

for purposes of complying with applicable listing rules of The Nasdaq Stock Market, the issuance of up to an aggregate of 33,385,052

Pubco Ordinary Shares, no par value, in connection with the Merger, Share Exchange and PIPE Investment.

Approval of the Nasdaq

Proposal requires the affirmative vote of the holders of a majority of the Company’s ordinary shares as of the record date represented

in person (including by virtual presence) or by proxy at the Meeting and entitled to vote thereon. The voting results were as follows:

FOR

AGAINST

ABSTAIN

BROKER NON-VOTES

3,407,497

181,693

7. The Pubco Director

Election Proposal

Shareholders

approved the proposal for the appointment of the following seven individuals, each effective from the consummation of the business

combination pursuant to the Business Combination Agreement, and who will constitute all the members of the board of directors of

Pubco: Carlos Moreira, David Fergusson, Cristina Dolan, Peter Ward, Cameron R. Johnson, Gwenael Rouy-Poirier and Philippe D.

Monnier.

Approval of the Pubco

Director Election Proposal requires the affirmative vote of the holders of a majority of the Company’s ordinary shares as of the

record date represented in person (including by virtual presence) or by proxy at the Meeting and entitled to vote thereon. The voting

results were as follows:

FOR

WITHHELD

BROKER

NON-VOTE

Carlos Moreira

3,407,795

181,395

David Fergusson

3,407,795

181,395

Cristina Dolan

3,407,795

181,395

Peter Ward

3,407,795

181,395

Cameron R. Johnson

3,407,795

181,395

Gwenael Rouy-Poirier

3,407,795

181,395

Philippe D. Monnier

3,407,795

181,395

As there were sufficient

votes to approve the above proposals, Proposal No. 8, the “Adjournment Proposal” described in the Proxy Statement was not

presented to the shareholders.

In connection with

the shareholders vote at the Meeting, 2,515,182 ordinary shares of CAC were tendered for redemption and redeemed upon closing of

business combination. As announced by Pubco in a press release dated October 1, 2026, on October 1, 2026, the business combination

with the Company pursuant to the Business Combination Agreement was closed.

Item 7.01 Regulation FD Disclosure.

As announced by Pubco

in a press release dated October 1, 2026, on October 1, 2026, the business combination with the Company pursuant to the Business Combination

Agreement was closed. A copy of the press release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein

by reference.

On October 2, 2026, Pubco

issued a press release announcing the commencement of trading of its ordinary shares on Nasdaq under the ticker symbol “SAIQ.”

A copy of the press release is attached to this Current Report on Form 8-K as Exhibit 99.2 and is incorporated herein by reference.

The information in this

Item 7.01 and Exhibits 99.1 and 99.2 shall not be deemed “filed” for any purpose, including for the purposes of Section 18

of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liabilities of that Section.

The information in this Item 7.01, including Exhibit 99.1 and 99.2, shall not be deemed incorporated by reference into any filing under

the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act regardless of any general incorporation

language in the filing, unless otherwise expressly set forth therein.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

The following exhibits are being filed herewith:

Exhibit No.

Description of Exhibits

99.1

Press Release dated October 1, 2026

99.2

Press Release dated October 2, 2026

104

Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 hereunto duly authorized.

Columbus Acquisition Corp

Dated: October 6, 2026

/s/ Carlos Moreira

Carlos Moreira

Sole Director

EX-99.1 — PRESS RELEASE DATED OCTOBER 1, 2026

EX-99.1

Filename: ea030718501ex99-1.htm · Sequence: 2

Exhibit 99.1

WISeSat.Space Holdings Corp. Announces Closing

of Business Combination with Columbus Acquisition Corp

GENEVA, Switzerland, October 1, 2026 -- WISeSat.Space

Holdings Corp., a British Virgin Islands business company (“Pubco” or “WISeSat”), today announced the completion

today October 1, 2026 (“Closing”) of its previously announced business combination with Columbus Acquisition Corp (“CAC”)

(the “Business Combination”). The ordinary shares of Pubco, the combined company following the Business Combination, will

commence trading on the Nasdaq on October 2, 2026, under the ticker symbol “SAIQ.”

The Business Combination was approved by CAC’s

shareholders at an extraordinary general meeting of shareholders on September 30, 2026, and all remaining closing conditions of the Business

Combination were satisfied or waived among the parties as of October 1, 2026 prior to Closing.

Advisors

Maxim Group LLC served as WISeSat’s financial

advisor. Ellenoff Grossman & Schole LLP represented WISeSat as legal counsel and Harney Westwood & Riegels (BVI) LP represented

WISeSat as British Virgin Islands legal counsel. Loeb & Loeb LLP represented CAC as legal counsel and Ogier represented CAC as Cayman

legal counsel. The Equity Group, Inc., served as WISeSat’s strategic communications advisor.

About WISeSat

WISeSat is a space technology company focused

on secure satellite communications for Internet of Things applications. Its approach combines satellite infrastructure with cybersecurity

and digital identity technologies to support trusted communications between connected devices and ground-based systems.

About Columbus Acquisition Corp.

Columbus Acquisition Corp. is a blank check company,

also commonly referred to as a special purpose acquisition company (SPAC) formed for the purpose of effecting a merger, share exchange,

asset acquisition, share purchase, reorganization, or similar business combination with one or more businesses or entities. Columbus is

led by Fen “Eric” Zhang, Chairman and Chief Executive Officer, and Jie “Janet” Hu, Chief Financial Officer, who

are growth-oriented executives with a long track record of value creation across industries.

Forward-Looking Statements

This press release includes “forward-looking

statements” within the meaning of the “safe harbor” provisions of the United States Private Securities Litigation Reform

Act of 1995. Forward-looking statements may be identified by the use of words such as “estimate,” “plan,” “project,”

“forecast,” “intend,” “will,” “expect,” “anticipate,” “believe,”

“seek,” “target” or other similar expressions that predict or indicate future events or trends or that are not

statements of historical matters. These forward-looking statements also include, but are not limited to, statements regarding estimation

of the listing. These statements are based on various assumptions, whether or not identified in this press release, and on the current

expectations of WISeSat’s management and are not predictions of actual performance. These statements involve risks, uncertainties

and other factors that may cause the actual results, levels of activity, performance, or achievements to be materially different from

those expressed or implied by these forward-looking statements. Although WISeSat believes that it has a reasonable basis for each forward-looking

statement contained in this press release, WISeSat cautions you that these statements are based on a combination of facts and factors

currently known and projections of the future, which are inherently uncertain. The forward-looking statements in this press release represent

the views of WISeSat as of the date of this press release. Subsequent events and developments may cause those views to change. Except

as may be required by law, WISeSat does not undertake any duty to update these forward-looking statements.

CONTACTS

WISeSat:

Carlos Moreira

Chairman & CEO

Tel: +41 22 594 3000

info@wisekey.com

WISeSat Investor Relations:

The Equity Group Inc.

Lena Cati

Tel: +1 212 836-9611

Lena.cati@theequitygroup.com

Columbus

Fen Zhang

Chairman and Chief Executive Officer

Email: eric.zhang@herculescapital.group

Tel: (+1) 949 899 1827

EX-99.2 — PRESS RELEASE DATED OCTOBER 2, 2026

EX-99.2

Filename: ea030718501ex99-2.htm · Sequence: 3

Exhibit 99.2

WISeSat.Space, a Space Technology Company, Closes

Business Combination with Columbus Acquisition Corporation

WISeSat.Space Ordinary Shares to Begin Trading

on Nasdaq on October 2

Listing Marks a New Chapter in the Company’s

Mission to Bring Cybersecurity to Space and Deliver Trusted Satellite Connectivity

WISeSat.Space to Celebrate

Milestone with Nasdaq Opening Bell Ceremony on October 9

GENEVA, Switzerland, October 2, 2026 -- WISeSat.Space Holdings

Corp. (Nasdaq: SAIQ) (“WISeSat.Space”), a space technology company focused on PQC secure satellite communications and Internet

of Things connectivity, announced on October 1, 2026 that it completed on that date its previously announced business combination (“Business

Combination”) with Columbus Acquisition Corp (“CAC”), a publicly traded special purpose acquisition company. The Business

Combination was approved by CAC’s shareholders at an extraordinary general meeting held on September 30, 2026. Effective today,

October 2, 2026, WISeSat.Space’s ordinary shares will begin trading on Nasdaq under the ticker symbol “SAIQ”.

To celebrate this achievement, Carlos Moreira,

Founder, Chairman and CEO of WISeSat.Space and its parent company, WISeQey Corp (“WISeQey”), is scheduled to ring the Nasdaq

Opening Bell ceremony on Friday, October 9, 2026, at Nasdaq MarketSite in New York City’s Times Square.

The Nasdaq listing supports the Company’s

ambition to expand its space infrastructure while leveraging WISeQey’s expertise in cybersecurity, digital identity and secure semiconductors.

WISeSat.Space’s mission is to extend trusted connectivity beyond terrestrial networks, enabling connected devices to communicate

securely through satellite infrastructure.

“Nasdaq listing represents an extraordinary

milestone for WISeSat.Space and for everyone who has contributed to this journey,” said Mr. Moreira. “I want to thank our

employees, management team, technology partners, advisors, investors and all those whose dedication has made this achievement possible.

Their commitment has helped turn our vision of bringing cybersecurity to space into a growing business.”

Mr. Moreira continued: “As more devices

and essential services rely on satellite connectivity, trust and PQC security must be built into the infrastructure from the outset. Our

ambition is to combine satellite communications with digital identity, secure chips and post-quantum technologies to help protect data

from the connected device to the space network. This listing opens a new chapter in advancing that mission.”

Bringing Cybersecurity to Space

WISeSat.Space has deployed satellites into orbit

since 2024 and is developing satellite connectivity designed to support secure communications for connected devices, including applications

in remote monitoring, logistics, defense, and infrastructure management.

Working within the WISeKey technology ecosystem,

including collaboration with it sister company SEALSQ Corp (Nasdaq: LAES), the Company aims to integrate hardware-based security, device

authentication and post-quantum protection into its satellite communications architecture. These capabilities are intended to help address

both today’s cybersecurity threats and the evolving risks associated with future quantum computing.

Nasdaq Opening Bell Ceremony

The celebration is currently scheduled to take

place on Friday, October 9, 2026, with the Nasdaq Opening Bell at 9:30 a.m. Eastern Time / 3:30 p.m. Swiss time.

The ceremony will recognize the teams and partners

behind WISeSat.Space’s development and its mission to build trusted connectivity for an increasingly connected world.

Advisors

Maxim Group LLC served as WISeSat.Space’s

financial advisor. Ellenoff Grossman & Schole LLP represented WISeSat.Space as legal counsel and Harney Westwood & Riegels (BVI)

LP represented WISeSat.Space as British Virgin Islands legal counsel. Loeb & Loeb LLP represented CAC as legal counsel and Ogier represented

CAC as Cayman legal counsel. The Equity Group, Inc., served as WISeSat’s strategic communications advisor.

About WISeSat.Space

WISeSat.Space Holdings Corp. is a space technology

company focused on secure satellite communications for Internet of Things applications. Its approach combines satellite infrastructure

with cybersecurity and digital identity technologies to support trusted communications between connected devices and ground-based systems.

Forward-Looking Statements

This communication expressly

or implicitly contains certain forward-looking statements concerning WISeSat.Space and its businesses. Forward-looking statements include

statements regarding our business strategy, financial performance, results of operations, market data, events or developments that we

expect or anticipate will occur in the future, as well as any other statements which are not historical facts. Although we believe that

the expectations reflected in such forward-looking statements are reasonable, no assurance can be given that such expectations will prove

to have been correct. These statements involve known and unknown risks and are based upon a number of assumptions and estimates which

are inherently subject to significant uncertainties and contingencies, many of which are beyond our control. Actual results may differ

materially from those expressed or implied by such forward-looking statements. Important factors that, in our view, could cause actual

results to differ materially from those discussed in the forward-looking statements include WISeSat.Space’s ability to continue

beneficial transactions with material parties, including a limited number of significant customers; market demand and semiconductor industry

conditions; and the risks discussed in WISeSat.Space’s filings with the SEC. Risks and uncertainties are further described in reports

filed by WISeSat.Space with the SEC.

WISeSat.Space is providing

this communication as of this date and does not undertake to update any forward-looking statements contained herein as a result of new

information, future events or otherwise.

CONTACTS

WISeSat:

Carlos Moreira

Chairman & CEO

Tel: +41 22 594 3000

info@wisesat.com

WISeSat Investor Relations:

The Equity Group Inc.

Lena Cati

Tel: +1 212 836-9611

Lena.cati@theequitygroup.com

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Indicate if an emerging growth company has elected not to use the extended transition period for complying with any new or revised financial accounting standards.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

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-Section B

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Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

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No definition available.

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Two-character EDGAR code representing the state or country of incorporation.

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The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

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-Number 240

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The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

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-Publisher SEC

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Local phone number for entity.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Subsection 4c

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

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Title of a 12(b) registered security.

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Name of the Exchange on which a security is registered.

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-Subsection d1-1

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Trading symbol of an instrument as listed on an exchange.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

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