Company: CSTAF
Filing Date: 2025-03-31
Form Type: NT 10-K
Source: 0001213900-25-026266
Chunk: 1

Company: Constellation Acquisition Corp I
Filing Date: 2025-03-31
Form: NT 10-K
Chunk 1
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State below in reasonable detail why Forms 10-K, 20-F,
11-K, 10-Q, 10-D, N-CEN, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

Constellation Acquisition Corp I (the “Company”)
is filing this Notification of Late Filing on Form 12b-25 with respect to its Annual Report on Form 10-K for the annual period ended December
31, 2024 (the “Form 10-K”). The Company has determined that it is unable to file its Form 10-K within the prescribed
time period without unreasonable effort or expense because the review and finalization of the financial information and other disclosures
required to be included in the Form 10-K. The Company anticipates filing the Form 10-K as soon as practicable and no later than 15 calendar
days following the prescribed due date, in accordance with Rule 12b-25 of the Securities and Exchange Act of 1934, as amended.

PART IV — OTHER INFORMATION

| (1) | Name and telephone number of person to contact in regard to this notification |

| Chandra R. Patel |     |        646 |     | 585-8975          |
| (Name)           |     | -Area Code |     | -Telephone Number |

| (2) | Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If answer is no, identify report(s). ☒ Yes ☐ No |

| (3) | Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? |

☐ Yes ☒ No

If so, attach an explanation of the anticipated
change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be
made.

| CONSTELLATION ACQUISITION CORP I             |
| (Name of Registrant as Specified in Charter) |

has caused this notification to be signed on its behalf
by the undersigned hereunto duly authorized.

| Date: March 31, 2025 | CONST