---
schema_version: "secwatch.filing_event.v1"
accession: "0000012208-23-000065"
form_type: "8-K"
ticker: "BIO"
cik: "0000012208"
company_name: "BIO-RAD LABORATORIES, INC."
filed_at: "2023-08-25T23:59:59+00:00"
generated_at: "2026-06-11T03:19:48.416455+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Bio-Rad CAO Ajit Ramalingam resigns; interim principal accounting officer appointed

## Summary
- Ajit Ramalingam, SVP and Chief Accounting Officer, resigns effective Sept 18, 2023.
- Tania DeVilliers, Senior Director, Corporate Controller, named interim principal accounting officer.
- DeVilliers is a CPA and Chartered Accountant with over 25 years of experience, formerly at PwC.
- Company has initiated a search for a permanent successor; interim compensation to be determined.

## SEC filing metadata
- accession: 0000012208-23-000065
- form_type: 8-K
- ticker: BIO
- cik: 0000012208
- company_name: BIO-RAD LABORATORIES, INC.
- filed_at: 2023-08-25T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/12208/000001220823000065/0000012208-23-000065-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/12208/000001220823000065/bio-20230821.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000012208-23-000065
- JSON: https://secwatch.observer/filing/0000012208-23-000065.json
- Plain text: https://secwatch.observer/filing/0000012208-23-000065.txt

## Key facts
- Executive change
  Tania DeVilliers was appointed as interim principal accounting officer at BIO-RAD LABORATORIES, INC..
  - Action: appointed
  - Role: interim principal accounting officer
  source text: Upon effectiveness of Mr. Ramalingam’s resignation and until a permanent successor is appointed by the Company, Tania DeVilliers will act as the Company’s interim principal accounting officer, in addition to her current position as Senior Director, Corporate Controller.
  evidence_url: https://www.sec.gov/Archives/edgar/data/12208/000001220823000065/0000012208-23-000065-index.htm
- Executive change
  Ajit Ramalingam departed as Senior Vice-President, Chief Accounting Officer at BIO-RAD LABORATORIES, INC..
  - Action: resign
  - Role: Senior Vice-President, Chief Accounting Officer
  source text: On August 21, 2023, Ajit Ramalingam, the Senior Vice-President, Chief Accounting Officer of Bio-Rad Laboratories, Inc. (the “Company”) and the Company’s principal accounting officer, notified the Company of his plans to resign from the Company, effective at the close of business on September 18, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/12208/000001220823000065/0000012208-23-000065-index.htm

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