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MPLT SCHEDULE 13D/A: SEC filing

An amendment to a Schedule 13D was

Filed with the SEC on · accession 0001104659-26-098444

MPLT filed a SCHEDULE 13D/A (schedule 13d/a) with the SEC on Aug 18, 2026. An amendment to a Schedule 13D was filed for MapLight Therapeutics, Inc. (MPLT), indicating a change in a major shareholder's ownership position or intentions. The stock moved +5.1% by the first close after the filing.

Summary of the filing

An amendment to a Schedule 13D was filed for MapLight Therapeutics, Inc. (MPLT), indicating a change in a major shareholder's ownership position or intentions. The filing text available does not disclose specific details of the amendment.

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Key details

Subject companyMapLight Therapeutics, Inc.

How MPLT stock reacted

Close before

$11.24

Aug 17, 2026

First close after

+5.11%

$11.82

5 trading days

+1.02%

$11.36

Since filing

-38.37%

$6.93

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Frequently asked questions

What did MPLT file with the SEC on Aug 18, 2026?

MPLT filed a SCHEDULE 13D/A (SEC filing). An amendment to a Schedule 13D was filed for MapLight Therapeutics, Inc. (MPLT), indicating a change in a major shareholder's ownership position or intentions. The filing text available does not disclose specific details of the amendment.

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 MPLT stock react to this filing?

MPLT closed at $11.24 before the filing and $11.82 on Aug 18, 2026 (+5.11%). Five trading days later: $11.36 (+1.02%).

Other MPLT SEC filings

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