Filed Pursuant to Rule 424(b)(3)
Registration No. 333-291423

Prospectus Supplement No. 8
(To Prospectus dated December 15, 2025)

Terra Innovatum Global N.V.
Up to 5,475,593 Ordinary Shares Issuable Upon the Exercise of Warrants

Up to 94,804,436 Ordinary Shares

Up to 40,200,000 Ordinary Shares Issuable Upon the Mandatory Conversion of Outstanding Preferred Shares

This prospectus supplement no. 8 (this “Prospectus Supplement”) amends and supplements the prospectus dated December 15, 2025 (as may be supplemented or amended from time to time, the “Prospectus”), which forms part of our Registration Statement on Form S-1 (Registration Statement No. 333-291423). This Prospectus Supplement is being filed to update and supplement the information included or incorporated by reference in the Prospectus with the information contained in the attached Current Reports on Form 8-K, each as filed with the U.S. Securities and Exchange Commission (the “SEC”) on October 16, 2026 and October 27, 2026 (collectively, the “Form 8-Ks”). Accordingly, we have attached the Form 8-Ks to this Prospectus Supplement.

This Prospectus Supplement updates and supplements the information in the Prospectus and is not complete without, and may not be delivered or utilized except in combination with, the Prospectus, including any amendments or supplements thereto. This Prospectus Supplement should be read in conjunction with the Prospectus, and if there is any inconsistency between the information in the Prospectus and this Prospectus Supplement, you should rely on this Prospectus Supplement.

Our ordinary shares, par value €0.01 per share (“Ordinary Shares”) are listed on The Nasdaq Stock Market LLC (“Nasdaq”) under the symbol “NKLR”. On October 27, 2026, the closing price of our Ordinary Shares as reported on Nasdaq was $2.12 per share.

We are an “emerging growth company” as that term is defined under the federal securities laws and, as such, are subject to certain reduced public company reporting requirements.

Investing in our securities involves risks that are described in the “Risk Factors” section of our Annual Report on Form 10-K, filed with the SEC on June 16, 2026 (the “Form 10-K”), beginning on page 12 of the Form 10-K.

Neither the SEC nor any state securities commission has approved or disapproved of the securities to be issued under this prospectus or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this Prospectus Supplement is October 28, 2026



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

October 9, 2026
Date of Report (Date of earliest event reported)

TERRA INNOVATUM GLOBAL N.V.
(Exact Name of Registrant as Specified in its Charter)

The Netherlands
001-42901
N/A
(State or other jurisdiction of incorporation)
(Commission File Number)
(I.R.S. Employer Identification No.)

Via Matteo Trenta 117, Lucca, Italy
 
55100
(Address of Principal Executive Offices)
 
(Zip Code)

Registrant’s telephone number, including area code: +39 0583 55797

(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

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

Title of each class
Trading Symbol(s)
Name of each exchange on which registered
Ordinary Shares, par value of €0.01 per share
NKLR
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 (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. ☐



Item 4.01
Changes in Registrant’s Certifying Accountant.

(a) Dismissal of Independent Registered Public Accounting Firm
 
On October 9, 2026, the Audit Committee of the Board of Directors (the “Audit Committee”) of Terra Innovatum Global N.V. (the “Company”) dismissed KPMG Accountants N.V. (“KPMG”) as the Company’s independent registered public accounting firm, effective as of October 12, 2026. As described below, the change in independent registered public accounting firm is not the result of any disagreement with KPMG.
 
KPMG’s audit report on the Company’s financial statements as of and for the fiscal year ended December 31, 2025 did not contain an adverse opinion or a disclaimer of opinion and was not qualified or modified as to uncertainty, audit scope or accounting principles.
 
During the fiscal year ended December 31, 2025, the only fiscal year for which KPMG served as the Company’s independent registered public accounting firm, as well as the subsequent interim period through October 12, 2026, there were (i) no disagreements (as defined in Item 304(a)(1)(iv) of Regulation S-K) between the Company and KPMG on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which, if not resolved to KPMG’s satisfaction, would have caused KPMG to make reference thereto in its report on the financial statements for such period, and (ii) no reportable events (as defined in Item 304(a)(1)(v) of Regulation S-K), except for the material weaknesses in the Company’s internal control over financial reporting described in Part II, Item 9A of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025 and Part I, Item 4 of the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2026, filed with the U.S. Securities and Exchange Commission (the “SEC”) on June 16, 2026 and August 14, 2026, respectively. The material weaknesses have not been remediated. The Audit Committee discussed the material weaknesses with KPMG, and the Company will authorize KPMG to respond fully to the inquiries of MaloneBailey, LLP (“MaloneBailey”), the Company’s expected successor independent registered public accounting firm, concerning such material weaknesses.
 
The Company provided KPMG with a copy of the disclosures it is making in this Current Report on Form 8-K and requested that KPMG furnish a letter addressed to the SEC stating whether it agrees with the statements made herein. A copy of KPMG’s letter, dated October 16, 2026, is filed as Exhibit 16.1 to this Current Report on Form 8-K.

(b) Engagement of New Independent Registered Public Accounting Firm

The Audit Committee has approved the engagement of MaloneBailey as the Company’s new independent registered public accounting firm for the fiscal year ending December 31, 2026, and the Company intends to engage MaloneBailey, subject to MaloneBailey’s completion of its standard client acceptance procedures. MaloneBailey previously served as the Company’s independent registered public accounting firm from April 29, 2025 to January 15, 2026.

Item 9.01
Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.
 
Description of Exhibits
 
Letter from KPMG Accountants N.V., dated October 16, 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.

Dated: October 16, 2026
   
     
 
TERRA INNOVATUM GLOBAL N.V.
     
 
By:
/s/ Alessandro Petruzzi
 
Name:
Alessandro Petruzzi
 
Title:
Chief Executive Officer




Exhibit 16.1

 
KPMG Accountants N.V.
Laan van Langerhuize 1
 
Audit
1186 DS Amstelveen
 
P.O. Box 74500
The Netherlands
 
1070 DB Amsterdam
Telephone +31 (0)20 656 7890
 
The Netherlands
www.kpmg.com/nl

Confidential
Securities and Exchange Commission Washington, D.C. 20549
Amstelveen, October 16, 2026

Ladies and Gentlemen:

We were previously principal accountants for Terra Innovatum Global N.V., and, under the date of June 15, 2026, we reported on the consolidated financial statements of Terra Innovatum Global N.V. as of and for the year ended December 31, 2025. On October 12, 2026, we were dismissed.

We have read Terra Innovatum’s statements included under Item 4.01 of its Form 8-K dated October 16, 2026, and we agree with such statements except we are not in a position to agree or disagree with Terra Innovatum‘s statement that the change was approved by the audit committee of the board of directors.

Very truly yours,

/s/ KPMG Accountants N.V.

 
Document classification: KPMG Confidential
 
KPMG Accountants N.V., a Dutch limited liability company registered with the trade register in the Netherlands under number 33263683, is a member firm of the global organization of independent member firms affiliated with KPMG International Limited, a private English company limited by guarantee.



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

October 23, 2026
Date of Report (Date of earliest event reported)

TERRA INNOVATUM GLOBAL N.V.
(Exact Name of Registrant as Specified in its Charter)

The Netherlands
001-42901
N/A
(State or other jurisdiction of incorporation)
(Commission File Number)
(I.R.S. Employer Identification No.)

Via Matteo Trenta 117, Lucca, Italy

55100
(Address of Principal Executive Offices)

(Zip Code)

Registrant’s telephone number, including area code: +39 0583 55797

(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

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

Title of each class
Trading Symbol(s)
Name of each exchange on which registered
Ordinary Shares, par value of €0.01 per share
NKLR
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 (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. ☐



Item 4.01
Changes in Registrant’s Certifying Accountant.

Engagement of New Independent Registered Public Accounting Firm

On October 23, 2026, Terra Innovatum Global N.V. (the “Company”) formally engaged MaloneBailey, LLP (“MaloneBailey”) as its independent registered public accounting firm for the fiscal year ending December 31, 2026. MaloneBailey previously served as the Company’s independent registered public accounting firm from April 29, 2025 to January 15, 2026.

During the fiscal years ended December 31, 2025 and 2024 and the subsequent interim period through October 23, 2026, neither the Company nor anyone acting on its behalf consulted with MaloneBailey regarding (i) the application of accounting principles to a specified transaction, either completed or proposed, or the type of audit opinion that might be rendered on the Company’s financial statements, and neither a written report nor oral advice was provided to the Company that MaloneBailey concluded was an important factor considered by the Company in reaching a decision as to any accounting, auditing or financial reporting issue; or (ii) any matter that was either the subject of a disagreement (as defined in Item 304(a)(1)(iv) of Regulation S-K) or a reportable event (as defined in Item 304(a)(1)(v) of Regulation S-K), in each case other than in connection with MaloneBailey’s prior engagement as the independent registered public accounting firm of the Company from April 29, 2025 to January 15, 2026, or as the independent auditor of Terra Innovatum S.R.L. and Xit Corp. (formerly GSR III Acquisition Corp.), each a wholly-owned subsidiary of the Company, as previously reported.

Item 9.01
Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.

Description of Exhibits
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.

Dated: October 27, 2026






TERRA INNOVATUM GLOBAL N.V.




By:
/s/ Alessandro Petruzzi

Name:
Alessandro Petruzzi

Title:
Chief Executive Officer