---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-255269"
form_type: "8-K"
ticker: "DYN"
cik: "0001818794"
company_name: "Dyne Therapeutics, Inc."
filed_at: "2024-11-12T23:59:59+00:00"
generated_at: "2026-05-30T02:08:47.326922+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Dyne upsizes ATM offering from $200M to $300M; $101.2M already sold

## Summary
- Filed prospectus supplement to sell up to $300M common stock via ATM with Jefferies, up from $200M.
- As of Nov 12, 2024, aggregate gross proceeds of ~$101.2M already sold under prior $200M program.
- New supplement replaces prior prospectus; no further sales will be made under the old one.
- Shares registered under existing shelf registration statement; legal opinion included as exhibit.

## SEC filing metadata
- accession: 0001193125-24-255269
- form_type: 8-K
- ticker: DYN
- cik: 0001818794
- company_name: Dyne Therapeutics, Inc.
- filed_at: 2024-11-12T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1818794/000119312524255269/0001193125-24-255269-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1818794/000119312524255269/d867502d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-255269
- JSON: https://secwatch.observer/filing/0001193125-24-255269.json
- Plain text: https://secwatch.observer/filing/0001193125-24-255269.txt

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