---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-23-018355"
form_type: "8-K"
ticker: "ZVSA"
cik: "0001859007"
company_name: "ZyVersa Therapeutics, Inc."
filed_at: "2023-05-19T23:59:59+00:00"
generated_at: "2026-06-14T20:05:33.068545+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# ZyVersa Therapeutics board members Katrin Rupalla and Daniel O'Connor resign effective May 18

## Summary
- Dr. Katrin Rupalla resigned to pursue opportunity that precludes board service.
- Daniel O'Connor stepped down after becoming CEO of Ambrx Biopharma; no disagreement.
- No successor directors announced; Chairman Stephen Glover thanked outgoing members.

## SEC filing metadata
- accession: 0001493152-23-018355
- form_type: 8-K
- ticker: ZVSA
- cik: 0001859007
- company_name: ZyVersa Therapeutics, Inc.
- filed_at: 2023-05-19T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1859007/000149315223018355/0001493152-23-018355-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1859007/000149315223018355/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-23-018355
- JSON: https://secwatch.observer/filing/0001493152-23-018355.json
- Plain text: https://secwatch.observer/filing/0001493152-23-018355.txt

## Key facts
- Executive change
  Katrin Rupalla resigned as Director at ZyVersa Therapeutics, Inc..
  - Action: resigned
  - Role: Director
  source text: On May 17, 2023, Katrin Rupalla, Ph.D., notified the Board of Directors (the “Board”) of ZyVersa Therapeutics, Inc. (the “Company”) that she was resigning from the Board effective May 18, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1859007/000149315223018355/0001493152-23-018355-index.htm
- Executive change
  Daniel J. O'Connor resigned as Director at ZyVersa Therapeutics, Inc..
  - Action: resigned
  - Role: Director
  source text: On May 17, 2023, Daniel J. O’Connor, notified the Board of the Company that he was resigning from the Board effective May 18, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1859007/000149315223018355/0001493152-23-018355-index.htm

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