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CLGN SCHEDULE 13D/A: SEC filing

A group of Loewenbaum family individuals and trusts

Filed with the SEC on · accession 0001104659-26-099668

CLGN filed a SCHEDULE 13D/A (schedule 13d/a) with the SEC on Aug 21, 2026. A report the company filed with the SEC (the US market regulator). The stock moved +0.3% by the first close after the filing.

Summary of the filing

A group of Loewenbaum family individuals and trusts filed a joint filing agreement as an amendment to a Schedule 13D regarding their holdings in CollPlant Biotechnologies Ltd. The filing is a procedural exhibit and does not disclose any change in ownership or intent.

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Key details

Subject companyCollPlant Biotechnologies Ltd.
Filing group memberThe Loewenbaum 1992 Trust
Filing group memberThe Waterproof Partnership, Ltd.
Filing group memberThe Loewenbaum Residence Trust FBO Anna Loewenbaum
Filing group memberThe Elizabeth Scott Loewenbaum 1992 Trust
Filer / trustee / general partnerLillian S. Loewenbaum
Filer / trustee / general partnerGeorge Walter Loewenbaum
FilerElizabeth Loewenbaum

How CLGN stock reacted

Close before

$3.14

Aug 20, 2026

First close after

+0.29%

$3.15

5 trading days

-7.74%

$2.90

Since filing

+28.34%

$4.03

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Frequently asked questions

What did CLGN file with the SEC on Aug 21, 2026?

CLGN filed a SCHEDULE 13D/A (SEC filing). A group of Loewenbaum family individuals and trusts filed a joint filing agreement as an amendment to a Schedule 13D regarding their holdings in CollPlant Biotechnologies Ltd. The filing is a procedural exhibit and does not disclose any change in ownership or intent.

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 CLGN stock react to this filing?

CLGN closed at $3.14 before the filing and $3.15 on Aug 21, 2026 (+0.29%). Five trading days later: $2.90 (-7.74%).

Other CLGN SEC filings

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