---
schema_version: "secwatch.filing_event.v1"
accession: "0001599901-23-000099"
form_type: "8-K"
ticker: null
cik: "0001599901"
company_name: "Avidity Biosciences, Inc."
filed_at: "2023-12-13T23:59:59+00:00"
generated_at: "2026-06-07T13:29:33.507973+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "medium"
source: SEC EDGAR
---

# Avidity Biosciences amends bylaws to align with universal proxy rules and Delaware law

## Summary
- Board adopted amended and restated bylaws effective December 12, 2023.
- Clarifies compliance with SEC Rule 14a-19 for director nominee solicitations.
- Updates procedures for stockholder meetings to conform to recent Delaware General Corporation Law changes.
- Enhances disclosure requirements for stockholder nominations and proposals, including ownership and relationship details.
- Includes technical, modernizing, and clarifying changes.

## SEC filing metadata
- accession: 0001599901-23-000099
- form_type: 8-K
- cik: 0001599901
- company_name: Avidity Biosciences, Inc.
- filed_at: 2023-12-13T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: medium
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1599901/000159990123000099/0001599901-23-000099-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1599901/000159990123000099/rna-20231212.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001599901-23-000099
- JSON: https://secwatch.observer/filing/0001599901-23-000099.json
- Plain text: https://secwatch.observer/filing/0001599901-23-000099.txt

## Key facts
- Governance Changes
  Avidity Biosciences, Inc.: Amended and restated bylaws to address universal proxy rules, revise stockholder meeting procedures, and enhance disclosure requirements for nominations and proposals (effective 2023-12-12).
  - Change: bylaw amendment
  - Effective: 2023-12-12
  source text: On December 12, 2023, the board of directors (the "Board") of Avidity Biosciences, Inc. (the “Company”) approved and adopted amended and restated bylaws of the Company (the "Amended and Restated Bylaws"), which became effective the same day.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1599901/000159990123000099/0001599901-23-000099-index.htm

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