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OSBC SCHEDULE 13G: SEC filing

A Schedule 13G was

Filed with the SEC on · accession 0002100119-26-001679

OSBC filed a SCHEDULE 13G (schedule 13g) with the SEC on Oct 30, 2026. A Schedule 13G was filed regarding Old Second Bancorp Inc (OSBC), indicating a passive ownership position by an institutional or other holder. The stock moved -1.3% by the first close after the filing.

Summary of the filing

A Schedule 13G was filed regarding Old Second Bancorp Inc (OSBC), indicating a passive ownership position by an institutional or other holder. The filing text provided does not disclose specific ownership percentages or holder details.

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Key details

IssuerOld Second Bancorp Inc

How OSBC stock reacted

Close before

$24.63

Oct 29, 2026

First close after

-1.34%

$24.30

5 trading days

-1.14%

$24.35

Since filing

-0.93%

$24.40

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Frequently asked questions

What did OSBC file with the SEC on Oct 30, 2026?

OSBC filed a SCHEDULE 13G (SEC filing). A Schedule 13G was filed regarding Old Second Bancorp Inc (OSBC), indicating a passive ownership position by an institutional or other holder. The filing text provided does not disclose specific ownership percentages or holder details.

How do I read a SCHEDULE 13G?

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

How did OSBC stock react to this filing?

OSBC closed at $24.63 before the filing and $24.30 on Oct 30, 2026 (-1.34%). Five trading days later: $24.35 (-1.14%).

Other OSBC SEC filings

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