MAT SCHEDULE 13D: Activist campaign
EdgePoint Investment Group Inc.
Filed with the SEC on · accession 0000947871-26-000942
MAT filed a SCHEDULE 13D (schedule 13d) with the SEC on Oct 22, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -0.1% by the first close after the filing.
Summary of the filing
EdgePoint Investment Group Inc. filed a Schedule 13D disclosing its position in Mattel Inc. and reporting sales of Mattel common stock over the past 60 days, including 20,947 shares on August 24, 2026 and 106,627 shares across September 2026.
Key details
How MAT stock reacted
Close before
$16.95
Oct 21, 2026
First close after
-0.06%
$16.94
5 trading days
-9.85%
$15.28
Since filing
-9.44%
$15.35
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Click hereFrequently asked questions
What did MAT file with the SEC on Oct 22, 2026?
MAT filed a SCHEDULE 13D (Activist campaign). EdgePoint Investment Group Inc. filed a Schedule 13D disclosing its position in Mattel Inc. and reporting sales of Mattel common stock over the past 60 days, including 20,947 shares on August 24, 2026 and 106,627 shares across September 2026.
What does a activist campaign mean for MAT stock?
A settlement removes uncertainty; the stock often reacts to whether the amount is bigger or smaller than investors expected.
How do I read a SCHEDULE 13D?
A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.
Why are SEC filings important?
Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13D (schedule 13d): A report the company filed with the SEC (the US market regulator).
How did MAT stock react to this filing?
MAT closed at $16.95 before the filing and $16.94 on Oct 22, 2026 (-0.06%). Five trading days later: $15.28 (-9.85%).
Other MAT SEC filings
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