---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-22-008498"
form_type: "8-K"
ticker: "BLFS"
cik: "0000834365"
company_name: "BIOLIFE SOLUTIONS INC"
filed_at: "2022-04-07T23:59:59+00:00"
generated_at: "2026-06-26T08:57:25.590654+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# BioLife Solutions dismisses BDO, engages Grant Thornton as new auditor; BDO had adverse opinion on internal controls

## Summary
- Dismissed BDO USA as independent auditor; engaged Grant Thornton effective April 6, 2022.
- BDO's audit reports on financial statements for FY 2021 and 2020 were unqualified with no disagreements.
- BDO's internal control report for FY 2021 had adverse opinion citing material weaknesses (entity-level controls, risk assessment, monitoring, IT).
- Material weaknesses previously disclosed in the 2021 10-K; no other reportable events occurred.
- Company provided BDO with a copy of the 8-K; BDO's letter is filed as Exhibit 16.1.

## SEC filing metadata
- accession: 0001437749-22-008498
- form_type: 8-K
- ticker: BLFS
- cik: 0000834365
- company_name: BIOLIFE SOLUTIONS INC
- filed_at: 2022-04-07T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/834365/000143774922008498/0001437749-22-008498-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/834365/000143774922008498/bioli20220406_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-22-008498
- JSON: https://secwatch.observer/filing/0001437749-22-008498.json
- Plain text: https://secwatch.observer/filing/0001437749-22-008498.txt

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