---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-206804"
form_type: "8-K"
ticker: "AURA"
cik: "0001501796"
company_name: "Aura Biosciences, Inc."
filed_at: "2026-05-05T23:59:59+00:00"
generated_at: "2026-05-14T23:20:31.783743+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Aura Biosciences raises ~$280.8M in public offering; to repurchase $39M in stock from Matrix Capital

## Summary
- Offering of 39,591,000 shares at $6.00 and 3,800,000 pre-funded warrants, net proceeds ~$280.8M.
- Underwriters' option for additional 6,508,650 shares exercised in full.
- $241.8M to advance clinical programs including bel-sar and early choroidal melanoma.
- $39M to repurchase 6,922,870 shares from Matrix Capital at $5.64 per share.
- Cash runway extended into second half of 2028.

## SEC filing metadata
- accession: 0001193125-26-206804
- form_type: 8-K
- ticker: AURA
- cik: 0001501796
- company_name: Aura Biosciences, Inc.
- filed_at: 2026-05-05T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1501796/000119312526206804/0001193125-26-206804-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1501796/000119312526206804/d133115d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-206804
- JSON: https://secwatch.observer/filing/0001193125-26-206804.json
- Plain text: https://secwatch.observer/filing/0001193125-26-206804.txt

## Source-grounded claims
- claim_id: 77a2a57666f4622b41aac97a989706d006dc4ec4
  claim: Aura Biosciences, Inc. entered into Underwriting Agreement with Leerink Partners LLC, TD Securities (USA) LLC and Evercore Group L.L.C., as representatives of the several underwriters (effective 2026-05-04).
  evidence_excerpt: On May 4, 2026, Aura Biosciences, Inc. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with Leerink Partners LLC, TD Securities (USA) LLC and Evercore Group L.L.C., as representatives of the several underwriters named therein (the “Underwriters”), relating to an underwritten public offering
  evidence_url: https://www.sec.gov/Archives/edgar/data/1501796/000119312526206804/0001193125-26-206804-index.htm

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