---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-059685"
form_type: "8-K"
ticker: "MASS"
cik: "0001555279"
company_name: "908 Devices Inc."
filed_at: "2025-06-16T23:59:59+00:00"
generated_at: "2026-05-19T06:26:50.950120+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# Board changes: Eisenberg resigns, co-founder Brown appointed director

## Summary
- Marcia Eisenberg resigned from board and compensation committee effective June 12, 2025.
- Eisenberg's resignation follows the company's sale of its bioprocessing product portfolio.
- Co-founder Christopher D. Brown appointed to board as Class III director term expiring at 2026 annual meeting.
- Brown is currently VP Analytics R&D at Repligen (RGEN), which purchased 908's bioprocessing portfolio.
- Brown waived initial compensation under the non-employee director policy; continues consulting agreement.

## SEC filing metadata
- accession: 0001104659-25-059685
- form_type: 8-K
- ticker: MASS
- cik: 0001555279
- company_name: 908 Devices Inc.
- filed_at: 2025-06-16T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1555279/000110465925059685/0001104659-25-059685-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1555279/000110465925059685/tm2517904d2_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-059685
- JSON: https://secwatch.observer/filing/0001104659-25-059685.json
- Plain text: https://secwatch.observer/filing/0001104659-25-059685.txt

## Key facts
- Executive change
  Christopher D. Brown was appointed as Director at 908 Devices Inc..
  - Action: appointed
  - Role: Director
  source text: On June 13, 2025, Christopher D. Brown was appointed to the Board to fill the vacancy created following Ms. Eisenberg’s resignation.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1555279/000110465925059685/0001104659-25-059685-index.htm
- Executive change
  Marcia Eisenberg resigned as Director at 908 Devices Inc..
  - Action: resigned
  - Role: Director
  source text: On June 12, 2025, Marcia Eisenberg resigned from the Board of Directors (the “Board”) of 908 Devices Inc. (the “Company”) and the Compensation Committee of the Board. Her resignation was effective on June 12, 2025 at 5:00 p.m. Eastern Time.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1555279/000110465925059685/0001104659-25-059685-index.htm

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