---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-276179"
form_type: "8-K"
ticker: "MAT"
cik: "0000063276"
company_name: "MATTEL INC /DE/"
filed_at: "2021-09-17T23:59:59+00:00"
generated_at: "2026-06-29T03:03:52.436236+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Mattel adopts bylaw amendments on meeting rules, exclusive forum, indemnification

## Summary
- Board approved Bylaw amendments effective Sept 14, 2021, updating stockholder meeting procedures and ownership record dates.
- Exclusive forum: federal district courts for Securities Act claims; Delaware Chancery for internal corporate claims.
- Clarified director nominee limits, qualified representative notice requirements, and indemnification success standard.
- Added emergency bylaw, gender-neutral pronouns, and changed title 'Chairman' to 'Chair' throughout.
- Permits greater flexibility in forming Board committees and delegation of authority.

## SEC filing metadata
- accession: 0001193125-21-276179
- form_type: 8-K
- ticker: MAT
- cik: 0000063276
- company_name: MATTEL INC /DE/
- filed_at: 2021-09-17T23:59:59+00:00
- event_type: other_material
- 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/63276/000119312521276179/0001193125-21-276179-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/63276/000119312521276179/d408114d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-276179
- JSON: https://secwatch.observer/filing/0001193125-21-276179.json
- Plain text: https://secwatch.observer/filing/0001193125-21-276179.txt

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