---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-053912"
form_type: "8-K"
ticker: null
cik: "0001934945"
company_name: "Trailblazer Merger Corp I"
filed_at: "2025-06-12T23:59:59+00:00"
generated_at: "2026-05-19T11:24:38.713717+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Trailblazer Merger I dismisses Marcum, hires CBIZ CPAs as auditor; going concern doubt noted

## Summary
- Marcum dismissed and CBIZ CPAs engaged as independent auditor for FY2025, effective June 10, 2025.
- CBIZ CPAs acquired Marcum's attest business effective November 1, 2024; no disagreements or reportable events.
- Prior audit reports (FY2024 and FY2023 each included explanatory paragraph on substantial doubt about going concern.
- Audit committee approved engagement; company provided Marcum with disclosure and Marcum submitted letter to SEC.

## SEC filing metadata
- accession: 0001213900-25-053912
- form_type: 8-K
- cik: 0001934945
- company_name: Trailblazer Merger Corp I
- filed_at: 2025-06-12T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1934945/000121390025053912/0001213900-25-053912-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1934945/000121390025053912/ea0245386-8k425_trail1.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-053912
- JSON: https://secwatch.observer/filing/0001213900-25-053912.json
- Plain text: https://secwatch.observer/filing/0001213900-25-053912.txt

## Key facts
- Auditor Changes
  Trailblazer Merger Corp I engaged CBIZ CPAs P.C. as its auditor.
  - Action: engagement
  - Auditor: CBIZ CPAs P.C.
  source text: On June 10, 2025, the Company dismissed Marcum as the Company’s independent registered public accounting firm, and CBIZ CPAs was engaged to serve as the independent registered public accounting firm of the Company for the year ending December 31, 2025, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1934945/000121390025053912/0001213900-25-053912-index.htm
- Auditor Changes
  Trailblazer Merger Corp I dismissed Marcum LLP as its auditor.
  - Action: dismissal
  - Auditor: Marcum LLP
  source text: On June 10, 2025, the Company dismissed Marcum as the Company’s independent registered public accounting firm, and CBIZ CPAs was engaged to serve as the independent registered public accounting firm of the Company for the year ending December 31, 2025, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1934945/000121390025053912/0001213900-25-053912-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.