---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-126873"
form_type: "8-K"
ticker: "RYTM"
cik: "0001649904"
company_name: "RHYTHM PHARMACEUTICALS, INC."
filed_at: "2023-12-18T23:59:59+00:00"
generated_at: "2026-06-07T11:19:27.261360+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Rhythm Pharmaceuticals amends bylaws to address universal proxy rules and enhance stockholder proposal disclosures

## Summary
- Amended and restated bylaws adopted by Board on Dec 14, 2023, effective same day.
- Clarifies compliance with SEC Rule 14a-19 for proxy solicitations supporting director nominees.
- Enhances disclosure requirements for stockholder nominations and other business proposals.
- Requires any stockholder soliciting proxies to use a proxy card color other than white.
- Deleted obsolete provisions and made technical, clarifying changes.

## SEC filing metadata
- accession: 0001104659-23-126873
- form_type: 8-K
- ticker: RYTM
- cik: 0001649904
- company_name: RHYTHM PHARMACEUTICALS, INC.
- filed_at: 2023-12-18T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1649904/000110465923126873/0001104659-23-126873-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1649904/000110465923126873/tm2332524d2_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-126873
- JSON: https://secwatch.observer/filing/0001104659-23-126873.json
- Plain text: https://secwatch.observer/filing/0001104659-23-126873.txt

## Key facts
- Governance Changes
  RHYTHM PHARMACEUTICALS, INC.: Amended and restated bylaws to adopt universal proxy rules, streamline stockholder nomination procedures, require white proxy card for soliciting stockholders, and delete obsolete provisions (effective 2023-12-14).
  - Change: bylaw amendment
  - Effective: 2023-12-14
  source text: On December 14, 2023, the Board of Directors (the “ Board ”) of Rhythm Pharmaceuticals, Inc., a Delaware corporation (the “ Company ”) approved and adopted amendments to the Company’s amended and restated bylaws (as amended, the “ Amended and Restated Bylaws ”), which became effective the same day.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1649904/000110465923126873/0001104659-23-126873-index.htm

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