---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-25-017418"
form_type: "8-K"
ticker: "BLZE"
cik: "0001462056"
company_name: "Backblaze, Inc."
filed_at: "2025-04-11T23:59:59+00:00"
generated_at: "2026-05-23T16:07:25.069179+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Backblaze dismisses BDO as auditor, engages Deloitte; prior material weaknesses remediated

## Summary
- Dismissed BDO USA as independent auditor effective April 8, 2025; no adverse opinions or disagreements in fiscal 2023 or 2024.
- Engaged Deloitte & Touche as new independent auditor for FY2025, effective immediately.
- Material weaknesses in internal controls (accounting transactions, equity, going concern) fully remediated as of Dec 31, 2024.
- BDO provided letter to SEC agreeing with the company's statements; letter filed as Exhibit 16.1.

## SEC filing metadata
- accession: 0001628280-25-017418
- form_type: 8-K
- ticker: BLZE
- cik: 0001462056
- company_name: Backblaze, Inc.
- filed_at: 2025-04-11T23:59:59+00:00
- event_type: other
- sentiment: neutral
- 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/1462056/000162828025017418/0001628280-25-017418-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1462056/000162828025017418/blze-20250408.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-25-017418
- JSON: https://secwatch.observer/filing/0001628280-25-017418.json
- Plain text: https://secwatch.observer/filing/0001628280-25-017418.txt

## Key facts
- Auditor Changes
  Backblaze, Inc. dismissed BDO USA, P.C. as its auditor.
  - Action: dismissal
  - Auditor: BDO USA, P.C.
  - Successor: Deloitte & Touche LLP
  source text: On April 8, 2025, Backblaze, Inc. (the “Company”) notified BDO USA, P.C. (“BDO”) that it was dismissed as the Company’s independent registered public accounting firm, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1462056/000162828025017418/0001628280-25-017418-index.htm
- Auditor Changes
  Backblaze, Inc. engaged Deloitte & Touche LLP as its auditor.
  - Action: engagement
  - Auditor: Deloitte & Touche LLP
  source text: On April 8, 2025, the Company’s Audit Committee approved the engagement of Deloitte & Touche LLP (“Deloitte”) as the Company’s independent registered public accounting firm for the year ending December 31, 2025, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1462056/000162828025017418/0001628280-25-017418-index.htm

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