---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-090316"
form_type: "8-K"
ticker: "AURA"
cik: "0001501796"
company_name: "Aura Biosciences, Inc."
filed_at: "2023-04-04T23:59:59+00:00"
generated_at: "2026-06-17T06:27:24.745006+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Aura Biosciences COO Mark De Rosch resigns effective April 30, 2023

## Summary
- COO Mark De Rosch resigns, effective April 30, 2023.
- De Rosch to provide transition services for 30 days, extendable by another 30 days at Company's option.
- No successor named as of filing date.

## SEC filing metadata
- accession: 0001193125-23-090316
- form_type: 8-K
- ticker: AURA
- cik: 0001501796
- company_name: Aura Biosciences, Inc.
- filed_at: 2023-04-04T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1501796/000119312523090316/0001193125-23-090316-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1501796/000119312523090316/d465749d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-090316
- JSON: https://secwatch.observer/filing/0001193125-23-090316.json
- Plain text: https://secwatch.observer/filing/0001193125-23-090316.txt

## Key facts
- Executive change
  Mark De Rosch resigned as Chief Operating Officer at Aura Biosciences, Inc..
  - Action: resigned
  - Role: Chief Operating Officer
  source text: On April 3, 2023, Mark De Rosch informed Aura Biosciences, Inc. (the “Company”) of his intent to resign as Chief Operating Officer of the Company. Mr. De Rosch’s resignation will be effective on April 30, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1501796/000119312523090316/0001193125-23-090316-index.htm

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