MNTN SCHEDULE 13G/A: SEC filing
Wellington Management Group LLP and affiliated entities
Filed with the SEC on · accession 0000902219-26-000235
MNTN filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Aug 13, 2026. Wellington Management Group LLP and affiliated entities filed a joint filing agreement as part of a Schedule 13G/A regarding their beneficial ownership of MNTN, Inc. common stock. The stock moved +2.8% by the first close after the filing.
Summary of the filing
Wellington Management Group LLP and affiliated entities filed a joint filing agreement as part of a Schedule 13G/A regarding their beneficial ownership of MNTN, Inc. common stock. The filing is a routine administrative amendment with no disclosed change in ownership position.
Key details
How MNTN stock reacted
Close before
$11.95
Aug 12, 2026
First close after
+2.76%
$12.28
5 trading days
+7.28%
$12.82
Since filing
-55.40%
$5.33
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Click hereFrequently asked questions
What did MNTN file with the SEC on Aug 13, 2026?
MNTN filed a SCHEDULE 13G/A (SEC filing). Wellington Management Group LLP and affiliated entities filed a joint filing agreement as part of a Schedule 13G/A regarding their beneficial ownership of MNTN, Inc. common stock. The filing is a routine administrative amendment with no disclosed change in ownership position.
How do I read a SCHEDULE 13G/A?
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 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).
How did MNTN stock react to this filing?
MNTN closed at $11.95 before the filing and $12.28 on Aug 13, 2026 (+2.76%). Five trading days later: $12.82 (+7.28%).
Other MNTN SEC filings
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