---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-136183"
form_type: "8-K"
ticker: "ASMB"
cik: "0001426800"
company_name: "ASSEMBLY BIOSCIENCES, INC."
filed_at: "2024-12-13T23:59:59+00:00"
generated_at: "2026-05-29T03:26:35.005764+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Assembly Biosciences amends bylaws, tightens advance notice for shareholder proposals and director nominations

## Summary
- Stockholder proposals and director nominations for 2025 annual meeting must be received between Jan 29 and Feb 28, 2025.
- Advance notice deadline changed to between 120 and 90 days before first anniversary of prior year's annual meeting.
- Stockholders soliciting proxies must use proxy card color other than white; white reserved for Board/Company use.
- Director nominees must deliver completed background questionnaire and specific written representations to the Secretary.
- Stockholders must update and supplement notices to ensure accuracy as of the record date for the applicable meeting.

## SEC filing metadata
- accession: 0000950170-24-136183
- form_type: 8-K
- ticker: ASMB
- cik: 0001426800
- company_name: ASSEMBLY BIOSCIENCES, INC.
- filed_at: 2024-12-13T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1426800/000095017024136183/0000950170-24-136183-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1426800/000095017024136183/asmb-20241212.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-136183
- JSON: https://secwatch.observer/filing/0000950170-24-136183.json
- Plain text: https://secwatch.observer/filing/0000950170-24-136183.txt

## Key facts
- Governance Changes
  ASSEMBLY BIOSCIENCES, INC.: Amended and restated bylaws to update advance notice provisions, deadlines, proxy card color, director nominee requirements, and stockholder notice updates (effective 2024-12-12).
  - Change: bylaw amendment
  - Effective: 2024-12-12
  source text: On December 12, 2024, the Board of Directors (the “Board”) of Assembly Biosciences, Inc. (the “Company”) approved an amendment and restatement of the Company’s Amended and Restated Bylaws (the “Amended Bylaws”), effective as of such date.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1426800/000095017024136183/0000950170-24-136183-index.htm

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