---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-102461"
form_type: "8-K"
ticker: null
cik: "0001850079"
company_name: "Telesis Bio Inc."
filed_at: "2024-08-30T23:59:59+00:00"
generated_at: "2026-05-31T06:51:02.174887+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Five directors resign from Telesis Bio board, CEO becomes chair

## Summary
- Directors Witney, Tsingos, Tumolo, Nachtsheim resigned Aug 27; Nelson resigned Aug 29, all effective immediately.
- Eric Esser, President and CEO, appointed as chair of the board.
- Audit Committee: Todd Krueger (chair), Sarah Hlavinka, Michael Hodges.
- Compensation Committee: Jim Weissman (chair), Andrea Jackson, Sarah Hlavinka.
- Nominating and Governance Committee: Steven Golub (chair), Andrea Jackson, Greg Herrema.

## SEC filing metadata
- accession: 0000950170-24-102461
- form_type: 8-K
- cik: 0001850079
- company_name: Telesis Bio Inc.
- filed_at: 2024-08-30T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1850079/000095017024102461/0000950170-24-102461-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1850079/000095017024102461/tbio-20240827.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-102461
- JSON: https://secwatch.observer/filing/0000950170-24-102461.json
- Plain text: https://secwatch.observer/filing/0000950170-24-102461.txt

## Key facts
- Executive change
  Jami Nachtsheim resigned as Director at Telesis Bio Inc..
  - Action: resigned
  - Role: Director
  source text: On August 27, 2024, Franklin R. Witney, Christine A. Tsingos, Annette Tumolo and Jami Nachtsheim and on August 29, 2024, Todd R. Nelson each gave notice of his or her resignation from the Board of Directors (the “Board”) of Telesis Bio Inc. (the “Company”) and from each committee of the Board on which he or she served, to be effective immediately
  evidence_url: https://www.sec.gov/Archives/edgar/data/1850079/000095017024102461/0000950170-24-102461-index.htm
- Executive change
  Annette Tumolo resigned as Director at Telesis Bio Inc..
  - Action: resigned
  - Role: Director
  source text: On August 27, 2024, Franklin R. Witney, Christine A. Tsingos, Annette Tumolo and Jami Nachtsheim and on August 29, 2024, Todd R. Nelson each gave notice of his or her resignation from the Board of Directors (the “Board”) of Telesis Bio Inc. (the “Company”) and from each committee of the Board on which he or she served, to be effective immediately
  evidence_url: https://www.sec.gov/Archives/edgar/data/1850079/000095017024102461/0000950170-24-102461-index.htm
- Executive change
  Todd R. Nelson resigned as Director at Telesis Bio Inc..
  - Action: resigned
  - Role: Director
  source text: On August 27, 2024, Franklin R. Witney, Christine A. Tsingos, Annette Tumolo and Jami Nachtsheim and on August 29, 2024, Todd R. Nelson each gave notice of his or her resignation from the Board of Directors (the “Board”) of Telesis Bio Inc. (the “Company”) and from each committee of the Board on which he or she served, to be effective immediately
  evidence_url: https://www.sec.gov/Archives/edgar/data/1850079/000095017024102461/0000950170-24-102461-index.htm
- Executive change
  Franklin R. Witney resigned as Director at Telesis Bio Inc..
  - Action: resigned
  - Role: Director
  source text: On August 27, 2024, Franklin R. Witney, Christine A. Tsingos, Annette Tumolo and Jami Nachtsheim and on August 29, 2024, Todd R. Nelson each gave notice of his or her resignation from the Board of Directors (the “Board”) of Telesis Bio Inc. (the “Company”) and from each committee of the Board on which he or she served, to be effective immediately
  evidence_url: https://www.sec.gov/Archives/edgar/data/1850079/000095017024102461/0000950170-24-102461-index.htm
- Executive change
  Christine A. Tsingos resigned as Director at Telesis Bio Inc..
  - Action: resigned
  - Role: Director
  source text: On August 27, 2024, Franklin R. Witney, Christine A. Tsingos, Annette Tumolo and Jami Nachtsheim and on August 29, 2024, Todd R. Nelson each gave notice of his or her resignation from the Board of Directors (the “Board”) of Telesis Bio Inc. (the “Company”) and from each committee of the Board on which he or she served, to be effective immediately
  evidence_url: https://www.sec.gov/Archives/edgar/data/1850079/000095017024102461/0000950170-24-102461-index.htm
- Executive change
  Eric Esser was appointed as Chair of the Board at Telesis Bio Inc..
  - Action: appointed
  - Role: Chair of the Board
  source text: the Board appointed Eric Esser, the Company’s President and CEO, to serve as the chair of the board
  evidence_url: https://www.sec.gov/Archives/edgar/data/1850079/000095017024102461/0000950170-24-102461-index.htm

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