secwatch.observer — SEC 8-K summary
======================================

Issuer:     MATTEL INC /DE/ (MAT)
CIK:        0000063276
Form:       8-K
Filed at:   2026-10-21T21:57:58+00:00
Accession:  0001193125-26-428038
Event type: leadership
Sentiment:  neutral
Materiality: 0.40
Item codes: 1.01, 5.02, 7.01, 9.01
LLM model:  deepseek-v4.1-flash:cloud@v2

Mattel adds EdgePoint partner Lee Matheson to board under cooperation pact; board grows to 10
--------------------------------------------------------------------------------

- EdgePoint Investment Group, an approximately 18% Mattel stockholder, signed a cooperation agreement dated October 21, 2026; EdgePoint Partner Lee Matheson joins the board.
- Board expanded from nine to ten directors; Matheson's term expires at the 2027 annual meeting, and Mattel agreed to nominate him for re-election there.
- EdgePoint received director replacement rights: the parties will jointly pick a mutually acceptable successor if Matheson leaves before the 2028 annual meeting.
- Mattel's appointment and nomination obligations terminate if EdgePoint's stake drops below 10% of outstanding common stock.
- Pact runs until five business days after the later of the day after the 2027 annual meeting and Matheson's board departure; includes standstill, voting and confidentiality terms.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/63276/000119312526428038/0001193125-26-428038-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/63276/000119312526428038/d111363d8k.htm
  HTML page:      https://secwatch.observer/filing/0001193125-26-428038

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer