8-K

Constellation Acquisition Corp I (CSTAF)

8-K 2025-06-05 For: 2025-06-05
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Added on April 06, 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 SecuritiesExchange Act of 1934


Date of Report (Date of earliest event reported): June 5, 2025


CONSTELLATION ACQUISITION CORP I

(Exact name of registrant as specified in its charter)

Cayman Islands 001-39945 98-1574835
(State or other jurisdiction<br><br> of incorporation) (Commission File Number) (IRS Employer<br><br> Identification No.)
200 Park Avenue<br><br> <br>32nd Floor<br><br> <br>New York, NY 10166
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(Address of principal executive offices) (Zip Code)

(646) 585-8975

Registrant’s telephone number, including area code


Not Applicable

(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<br>Exchange Act (17 CFR 240.14a-12)
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Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
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Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
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Securities registered pursuant to Section 12(b) of the Act:

**** Title of each class Trading Symbol(s) Name of each exchange on which registered
Class A ordinary shares, par value $0.0001 per share CSTAF OTCQX® Best Market
Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 CSTWF OTCQB® Venture Market
Units, each consisting of one Class A ordinary share and one-third of one redeemable warrant CSTUF OTCQX® Best Market

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 1.01 Entry into a Material Definitive Agreement.

On January 29, 2024, Constellation Acquisition Corp I, a Cayman Islands exempted company (the “Company”), issued an unsecured promissory note (the “Promissory Note”) in the principal amount of $1,660,000 to Constellation Sponsor LP, a Delaware limited partnership, bearing no interest and maturing once the Company closes its initial business combination. On June 5, 2025, the Company amended the promissory note (the “Amendment”), to increase the principal amount by $590,000 from $1,660,000 to $2,250,000. Unless otherwise set forth in the Amendment, all other provisions of the Promissory Note remain in full force and effect.

The foregoing description of the Amendment is qualified in its entirety by reference to the full text of the Amendment, which is incorporated by reference herein and filed herewith as Exhibit 10.1.

Item 2.03 Creation of a Direct Financial Obligationor an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The disclosure contained in Item 1.01 of this Current Report on Form 8-K is incorporated by reference in this Item 2.03.

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Item 9.01. Exhibits.

(d) Exhibits

Exhibit No. Exhibit
10.1 Amendment to the Promissory Note, dated June 5, 2025, between Constellation Acquisition Corp I and Constellation Sponsor LP.
104 Cover Page Interactive Data File (embedded within the Inline XBRL document).

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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.

CONSTELLATION ACQUISITION CORP I
Dated: June 5, 2025 By: /s/ Chandra R. Patel
Chandra R. Patel
Chief Executive Officer
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Exhibit 10.1


FIRST AMENDMENT TO PROMISSORY NOTE

THIS FIRST AMENDMENT TO THE PROMISSORY NOTE (this “Amendment”) is dated as of the 5th day of June, 2025 and is made by and between Constellation Acquisition Corp I, a Cayman Islands exempted company (the “Maker”), and Constellation Sponsor LP, a Delaware limited partnership, or its registered assigns or successors in interest (the “Payee”).

RECITALS

A. Maker executed that certain Promissory Note dated January 30, 2024, in the original principal amount of up to $1,660,000 (the “Note”).

B. Maker and Payee have agreed to amend the Note.

C. Unless otherwise set forth herein, all other provisions of the Note shall remain in full force and effect.

E. All capitalized terms not defined in this Amendment will have the meanings given to them in the Note.

In consideration of these promises, the mutual covenants contained in this Amendment and other good and valuable consideration, the receipt and sufficiency of which are acknowledged, the parties agree as follows:

  1. The Total Principal Amount of the Note is increased by $590,000 from $1,660,000 to $2,250,000.

  2. Section 3 of the Note is hereby amended and restated in its entirety to read as follows:


“3. Drawdown Requests. Maker and Payee agree that, in addition to the Initial Principal Amount, Maker may request an additional aggregate amount of up to (i) $605,000, which may be drawn down in eleven (11) equal tranches subject to a request from Maker and (ii) $1,590,000, which may be drawn down from time to time until the Maker consummates a Business Combination (each a “Drawdown Request”). Payee shall fund each Drawdown Request no later than three (3) business days after receipt of a Drawdown Request. Once an amount is drawn down under this Note, it shall not be available for future Drawdown Requests even if prepaid. No fees, payments or other amounts shall be due to Payee in connection with, or as a result of, any Drawdown Request by the Maker.”

[Signature Page Follows]

IN WITNESS WHEREOF, the Maker and Payee, intending to be legally bound hereby, have caused this Amendment to the Note to be duly executed as of the day and year first above written.

Constellation Acquisition Corp I
By: /s/ Chandra R. Patel
Name: Chandra R. Patel
Title: Chief Executive Officer

Agreed and Acknowledged:


Constellation Sponsor LPa Delaware limited partnership

By: Antarctica Endurance Manager, LLC, its
general partner
By: /s/ Chandra R. Patel
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Name: Chandra R. Patel
Title: Manager