---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-23-024168"
form_type: "8-K"
ticker: "PBYI"
cik: "0001401667"
company_name: "PUMA BIOTECHNOLOGY, INC."
filed_at: "2023-08-18T23:59:59+00:00"
generated_at: "2026-06-11T06:51:47.250432+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Puma Biotechnology amends bylaws to align with universal proxy rules and enhance stockholder disclosure requirements

## Summary
- Board adopted Fourth Amended and Restated Bylaws on August 17, 2023, effective immediately.
- Amendments address universal proxy rules under Rule 14a-19, requiring compliance for non-board solicitations.
- Non-board proxy solicitations must use a proxy card color other than white, reserved for Board use.
- Enhanced advance notice disclosure for stockholders proposing business or nominating directors, including ownership and litigation info.
- Technical updates to align with Delaware General Corporation Law and Exchange Act.

## SEC filing metadata
- accession: 0001437749-23-024168
- form_type: 8-K
- ticker: PBYI
- cik: 0001401667
- company_name: PUMA BIOTECHNOLOGY, INC.
- filed_at: 2023-08-18T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1401667/000143774923024168/0001437749-23-024168-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1401667/000143774923024168/pbyi20230817_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-23-024168
- JSON: https://secwatch.observer/filing/0001437749-23-024168.json
- Plain text: https://secwatch.observer/filing/0001437749-23-024168.txt

## Key facts
- Governance Changes
  PUMA BIOTECHNOLOGY, INC.: Adopted amended and restated bylaws addressing universal proxy rules, proxy card color, advance notice disclosure, and other updates (effective 2023-08-17).
  - Change: bylaw amendment
  - Effective: 2023-08-17
  source text: On August 17, 2023, the Board of Directors (the “Board”) of Puma Biotechnology, Inc. (the “Company”) approved and adopted an amendment and restatement of the Company’s Third Amended and Restated Bylaws (as so amended, the “Bylaws”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1401667/000143774923024168/0001437749-23-024168-index.htm

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