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SPHR SCHEDULE 13D/A: Activist campaign

An amendment to a Schedule 13D was

Filed with the SEC on · accession 0000807249-26-000069

SPHR filed a SCHEDULE 13D/A (schedule 13d/a) with the SEC on Aug 14, 2026. An amendment to a Schedule 13D was filed regarding Sphere Entertainment Co., indicating a holder's updated position or intentions. The stock moved -4.8% by the first close after the filing.

Summary of the filing

An amendment to a Schedule 13D was filed regarding Sphere Entertainment Co., indicating a holder's updated position or intentions. The filing text does not disclose specific changes in ownership or plans.

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Key details

Subject companySphere Entertainment Co.

How SPHR stock reacted

Close before

$176.38

Aug 13, 2026

First close after

-4.75%

$168.00

5 trading days

-11.42%

$156.23

Since filing

-31.95%

$120.02

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Frequently asked questions

What did SPHR file with the SEC on Aug 14, 2026?

SPHR filed a SCHEDULE 13D/A (Activist campaign). An amendment to a Schedule 13D was filed regarding Sphere Entertainment Co., indicating a holder's updated position or intentions. The filing text does not disclose specific changes in ownership or plans.

What does a activist campaign mean for SPHR 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?

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/A (schedule 13d/a): A report the company filed with the SEC (the US market regulator).

How did SPHR stock react to this filing?

SPHR closed at $176.38 before the filing and $168.00 on Aug 14, 2026 (-4.75%). Five trading days later: $156.23 (-11.42%).

Other SPHR SEC filings

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