KOP SCHEDULE 13G: SEC filing
A Schedule 13G was
Filed with the SEC on · accession 0002100119-26-001629
KOP filed a SCHEDULE 13G (schedule 13g) with the SEC on Oct 30, 2026. A Schedule 13G was filed regarding Koppers Holdings Inc. (KOP), indicating a passive ownership position by an institutional or other holder. The stock moved -0.9% by the first close after the filing.
Summary of the filing
A Schedule 13G was filed regarding Koppers Holdings Inc. (KOP), indicating a passive ownership position by an institutional or other holder. The filing text provided does not disclose the holder's identity, ownership percentage, or share count.
Key details
How KOP stock reacted
Close before
$41.86
Oct 29, 2026
First close after
-0.86%
$41.50
5 trading days
-5.30%
$39.64
Since filing
-28.40%
$29.97
✦ Ask GOAX AI about this filing — what it means for KOP, what changed since its last filings and what to watch next.
Try it free for 7 days🔔 Want to stay updated on new SEC filings for KOP?
Click hereFrequently asked questions
What did KOP file with the SEC on Oct 30, 2026?
KOP filed a SCHEDULE 13G (SEC filing). A Schedule 13G was filed regarding Koppers Holdings Inc. (KOP), indicating a passive ownership position by an institutional or other holder. The filing text provided does not disclose the holder's identity, ownership percentage, or share count.
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 KOP stock react to this filing?
KOP closed at $41.86 before the filing and $41.50 on Oct 30, 2026 (-0.86%). Five trading days later: $39.64 (-5.30%).
Other KOP SEC filings
- 8-K · SEC filingNov 6, 2026
- 10-Q · SEC filingNov 6, 2026
- SCHEDULE 13D/A · Activist campaignOct 22, 2026
- SCHEDULE 13G/A · SEC filingOct 19, 2026
- SCHEDULE 13G/A · SEC filingOct 8, 2026
- 10-Q · SEC filingAug 6, 2026
- 8-K · SEC filingAug 6, 2026
- 8-K · Cfo changeMay 11, 2026
- 8-K · Guidance cutMay 8, 2026
- 10-Q · Executive departureMay 8, 2026
Get alerts when KOP files with the SEC, plus live charts, key levels and news for 13,000+ stocks.
Try SEPT free for 7 days