BLDR SCHEDULE 13G/A: SEC filing

A Schedule 13G/A amendment was

Filed with the SEC on Oct 5, 2026 · accession 0002012383-26-003316

BLDR filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Oct 5, 2026. A Schedule 13G/A amendment was filed regarding beneficial ownership of Builders FirstSource, Inc. (BLDR) common stock. The stock moved -1.1% by the first close after the filing.

Summary of the filing

A Schedule 13G/A amendment was filed regarding beneficial ownership of Builders FirstSource, Inc. (BLDR) common stock. The filing indicates a change in a holder's passive ownership position.

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Key details

IssuerBuilders FirstSource, Inc.

How BLDR stock reacted

Close before

$56.25

Oct 2, 2026

First close after

-1.10%

$55.63

5 trading days

-6.04%

$52.85

Since filing

+11.18%

$62.54

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Frequently asked questions

What did BLDR file with the SEC on Oct 5, 2026?

BLDR filed a SCHEDULE 13G/A (SEC filing). A Schedule 13G/A amendment was filed regarding beneficial ownership of Builders FirstSource, Inc. (BLDR) common stock. The filing indicates a change in a holder's passive 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 BLDR stock react to this filing?

BLDR closed at $56.25 before the filing and $55.63 on Oct 5, 2026 (-1.10%). Five trading days later: $52.85 (-6.04%).

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