---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-21-025951"
form_type: "8-K"
ticker: "BLFS"
cik: "0000834365"
company_name: "BIOLIFE SOLUTIONS INC"
filed_at: "2021-11-09T23:59:59+00:00"
generated_at: "2026-06-28T11:08:25.850053+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# BioLife Solutions promotes Wichterman to CFO, de Greef to President/COO; Tenney resigns

## Summary
- Troy Wichterman promoted from VP Finance to CFO, effective Nov 4, 2021.
- Roderick de Greef, former CFO, named President and COO, postponing retirement until early 2023.
- COO Dusty Tenney resigned effective immediately; will serve as consultant through year-end then join private equity firm.
- Wichterman joined BioLife in 2015, holds MAcc from UW-Madison, is a CPA (inactive).
- de Greef has over 20 years with BioLife, previously served as COO from Dec 2019 to May 2021.

## SEC filing metadata
- accession: 0001437749-21-025951
- form_type: 8-K
- ticker: BLFS
- cik: 0000834365
- company_name: BIOLIFE SOLUTIONS INC
- filed_at: 2021-11-09T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/834365/000143774921025951/0001437749-21-025951-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/834365/000143774921025951/bioli20211105_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-21-025951
- JSON: https://secwatch.observer/filing/0001437749-21-025951.json
- Plain text: https://secwatch.observer/filing/0001437749-21-025951.txt

## Key facts
- Executive change
  Maurice 'Dusty' Tenney resigned as Chief Operating Officer at BIOLIFE SOLUTIONS INC.
  - Action: resigned
  - Role: Chief Operating Officer
  source text: On November 3, 2021, Maurice “Dusty” Tenney, the Chief Operating Officer of BioLife Solutions, Inc. (the “Company”), notified the Company of his intent to resign as Chief Operating Officer, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/834365/000143774921025951/0001437749-21-025951-index.htm
- Executive change
  Roderick de Greef was appointed as President and Chief Operating Officer at BIOLIFE SOLUTIONS INC.
  - Action: appointed
  - Role: President and Chief Operating Officer
  source text: On November 4, 2021, the Company appointed Troy Wichterman as Chief Financial Officer and Roderick de Greef as President and Chief Operating Officer.
  evidence_url: https://www.sec.gov/Archives/edgar/data/834365/000143774921025951/0001437749-21-025951-index.htm
- Executive change
  Troy Wichterman was appointed as Chief Financial Officer at BIOLIFE SOLUTIONS INC.
  - Action: appointed
  - Role: Chief Financial Officer
  source text: On November 4, 2021, the Company appointed Troy Wichterman as Chief Financial Officer
  evidence_url: https://www.sec.gov/Archives/edgar/data/834365/000143774921025951/0001437749-21-025951-index.htm

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