---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-22-002152"
form_type: "8-K"
ticker: "REVB"
cik: "0001810560"
company_name: "REVELATION BIOSCIENCES, INC."
filed_at: "2022-01-14T23:59:59+00:00"
generated_at: "2026-06-27T17:59:30.461706+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Revelation Biosciences (f/k/a Petra Acquisition) closes de-SPAC merger; new board appointed

## Summary
- Business combination of Petra Acquisition and Revelation Biosciences closed Jan 10, 2022; company renamed Revelation Biosciences.
- Holders of 3,480,362 Petra shares redeemed for ~$35.5M ($10.20/share); ~$7.6M escrowed, ~$4.2M released to company.
- Immediately post-closing: 12,944,213 common shares outstanding; 10,490,461 warrants and 460,706 RSUs outstanding.
- New board appointed: George Tidmarsh, James Rolke, Jennifer Carver, Jess Roper, Curt LaBelle; prior Petra directors/officers resigned.
- Petra ceased to be a shell company; common stock begins trading on Nasdaq under REVB, REVBU, REVBW.

## SEC filing metadata
- accession: 0001213900-22-002152
- form_type: 8-K
- ticker: REVB
- cik: 0001810560
- company_name: REVELATION BIOSCIENCES, INC.
- filed_at: 2022-01-14T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.01, 9.01, 3.02, 5.01, 5.02, 5.03, 5.06
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1810560/000121390022002152/0001213900-22-002152-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1810560/000121390022002152/ea154019-8k_revelation.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-22-002152
- JSON: https://secwatch.observer/filing/0001213900-22-002152.json
- Plain text: https://secwatch.observer/filing/0001213900-22-002152.txt

## Key facts
- Executive change
  Andreas Typaldos departed as Director at REVELATION BIOSCIENCES, INC..
  - Action: ceased serving
  - Role: Director
  source text: each of Andreas Typaldos, David Dobkin, Anthony Hayes, Robert Nicholson, Barry Dennis and William Carson ceased serving as a director of Petra
  evidence_url: https://www.sec.gov/Archives/edgar/data/1810560/000121390022002152/0001213900-22-002152-index.htm
- Executive change
  William Carson departed as Director at REVELATION BIOSCIENCES, INC..
  - Action: ceased serving
  - Role: Director
  source text: each of Andreas Typaldos, David Dobkin, Anthony Hayes, Robert Nicholson, Barry Dennis and William Carson ceased serving as a director of Petra
  evidence_url: https://www.sec.gov/Archives/edgar/data/1810560/000121390022002152/0001213900-22-002152-index.htm
- Executive change
  Andreas Typaldos departed as Executive Officer at REVELATION BIOSCIENCES, INC..
  - Action: ceased serving
  - Role: Executive Officer
  source text: Andreas Typaldos and Sean Fitzpatrick ceased serving as executive officers of Petra
  evidence_url: https://www.sec.gov/Archives/edgar/data/1810560/000121390022002152/0001213900-22-002152-index.htm
- Executive change
  Anthony Hayes departed as Director at REVELATION BIOSCIENCES, INC..
  - Action: ceased serving
  - Role: Director
  source text: each of Andreas Typaldos, David Dobkin, Anthony Hayes, Robert Nicholson, Barry Dennis and William Carson ceased serving as a director of Petra
  evidence_url: https://www.sec.gov/Archives/edgar/data/1810560/000121390022002152/0001213900-22-002152-index.htm
- Executive change
  David Dobkin departed as Director at REVELATION BIOSCIENCES, INC..
  - Action: ceased serving
  - Role: Director
  source text: each of Andreas Typaldos, David Dobkin, Anthony Hayes, Robert Nicholson, Barry Dennis and William Carson ceased serving as a director of Petra
  evidence_url: https://www.sec.gov/Archives/edgar/data/1810560/000121390022002152/0001213900-22-002152-index.htm
- Executive change
  Sean Fitzpatrick departed as Executive Officer at REVELATION BIOSCIENCES, INC..
  - Action: ceased serving
  - Role: Executive Officer
  source text: Andreas Typaldos and Sean Fitzpatrick ceased serving as executive officers of Petra
  evidence_url: https://www.sec.gov/Archives/edgar/data/1810560/000121390022002152/0001213900-22-002152-index.htm
- Executive change
  Barry Dennis departed as Director at REVELATION BIOSCIENCES, INC..
  - Action: ceased serving
  - Role: Director
  source text: each of Andreas Typaldos, David Dobkin, Anthony Hayes, Robert Nicholson, Barry Dennis and William Carson ceased serving as a director of Petra
  evidence_url: https://www.sec.gov/Archives/edgar/data/1810560/000121390022002152/0001213900-22-002152-index.htm
- Executive change
  Robert Nicholson departed as Director at REVELATION BIOSCIENCES, INC..
  - Action: ceased serving
  - Role: Director
  source text: each of Andreas Typaldos, David Dobkin, Anthony Hayes, Robert Nicholson, Barry Dennis and William Carson ceased serving as a director of Petra
  evidence_url: https://www.sec.gov/Archives/edgar/data/1810560/000121390022002152/0001213900-22-002152-index.htm

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