Company: TBMC
Filing Date: 2025-10-06
Form Type: 425
Source: 0001213900-25-096660
Chunk: 0

Company: Trailblazer Merger Corp I
Filing Date: 2025-10-06
Form: 425
Chunk 0
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<div align='center'>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, 2025

Trailblazer Merger Corporation I

(Exact Name of Registrant as Specified in its Charter)</div>

| Delaware                     |     | 001-41668               |     | 87-3710376         |
| (State or other jurisdiction 
 of incorporation)            |     | -Commission File Number |     | -I.R.S. Employer   
 Identification No. |

| 510 Madison Avenue                       
 Suite 1401                               
 New York, NY                             |     |     10022 |
| (Address of Principal Executive Offices) |     | -Zip Code |

<div align='center'>Registrant’s telephone number, including
area code: (212) 586-8224

N/A

(Former name or former address, if changed since
last report)</div>

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                     |
| Common Stock        |     | TBMC              |     | The Nasdaq Stock Market LLC    |
| Rights              |     | TBMCR             |     | 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