---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-070787"
form_type: "8-K"
ticker: "DCTH"
cik: "0000872912"
company_name: "DELCATH SYSTEMS, INC."
filed_at: "2024-03-19T23:59:59+00:00"
generated_at: "2026-06-04T14:19:36.211321+00:00"
event_type: "leadership"
sentiment: "positive"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Delcath appoints Martha Rook as COO effective March 18, 2024

## Summary
- Martha Rook appointed COO; succeeds John Purpura who is retiring after consulting transition.
- Rook brings 25+ years experience from insitro, Sigilon, MilliporeSigma; Ph.D. in biochemistry from MIT.
- Compensation: $425,000 base salary, up to 40% bonus, 125,000 options vesting over 36 months.
- Purpura enters 6-month consulting agreement; 91,596 options vest over period, expiry extended to Sep 2025.

## SEC filing metadata
- accession: 0001193125-24-070787
- form_type: 8-K
- ticker: DCTH
- cik: 0000872912
- company_name: DELCATH SYSTEMS, INC.
- filed_at: 2024-03-19T23:59:59+00:00
- event_type: leadership
- sentiment: positive
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/872912/000119312524070787/0001193125-24-070787-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/872912/000119312524070787/d748780d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-070787
- JSON: https://secwatch.observer/filing/0001193125-24-070787.json
- Plain text: https://secwatch.observer/filing/0001193125-24-070787.txt

## Key facts
- Executive change
  Martha S. Rook was appointed as Chief Operating Officer at DELCATH SYSTEMS, INC..
  - Action: appointed
  - Role: Chief Operating Officer
  source text: Effective as of March 18, 2024, Delcath Systems, Inc. (the “Company”) appointed Martha S. Rook, Ph.D., as Chief Operating Officer of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/872912/000119312524070787/0001193125-24-070787-index.htm
- Executive change
  John Purpura retired as Chief Operating Officer at DELCATH SYSTEMS, INC..
  - Action: retired
  - Role: Chief Operating Officer
  source text: As previously reported on February 12, 2024, John Purpura notified the Company of his intent to retire as the Company’s Chief Operating Officer
  evidence_url: https://www.sec.gov/Archives/edgar/data/872912/000119312524070787/0001193125-24-070787-index.htm

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