KOP Koppers Holdings Inc.companySEC Filings & Insider Trading Activity 2026
Latest Koppers Holdings Inc. (KOP) SEC EDGAR filings in 2026, including the most recent 10-K annual report filed on February 26, 2026, a 10-Q quarterly report filed on May 8, 2026, an 8-K current report filed on August 6, 2026. SignalX aggregates every new 10-K annual report, 10-Q quarterly report, 8-K current report, and Form 4 insider transaction for Koppers Holdings Inc. (KOP) (SEC CIK 1315257), with AI-powered section-by-section summaries updated daily.
Latest 2026 SEC Filing Dates
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Recent 8-K FilingsCurrent Reports
AI-powered analysis of Koppers Holdings Inc. (KOP) 8-K current reports disclosing material events.
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
| Form | Filing Date | Period | Analysis | SEC |
|---|---|---|---|---|
8-K | Aug 6, 2026 | - | - | - |
8-K | May 11, 2026 | - | - | |
8-K | May 8, 2026 | - | - | |
10-Q | May 8, 2026 | Mar 31, 2026 | - | |
8-K | May 7, 2026 | - | - | |
8-K | Mar 18, 2026 | - | Analysis | - |
10-K | Feb 26, 2026 | Dec 31, 2025 | - | |
8-K | Feb 26, 2026 | - | Analysis | - |
8-K | Jan 9, 2026 | - | - | |
8-K | Dec 3, 2025 | - | - | |
10-Q | Nov 7, 2025 | Sep 30, 2025 | - | |
10-Q | Aug 8, 2025 | Jun 30, 2025 | - | |
10-Q | May 9, 2025 | Mar 31, 2025 | - | |
10-K | Feb 27, 2025 | Dec 31, 2024 | - | |
10-Q | Nov 8, 2024 | Sep 30, 2024 | - | |
10-Q | Aug 8, 2024 | Jun 30, 2024 | - | |
10-Q | May 3, 2024 | Mar 31, 2024 | - | |
10-K | Feb 28, 2024 | Dec 31, 2023 | - | |
SC 13G | Feb 9, 2024 | - | - | |
10-Q | Nov 3, 2023 | Sep 30, 2023 | - | |
10-Q | Aug 3, 2023 | Jun 30, 2023 | - | |
10-Q | May 5, 2023 | Mar 31, 2023 | - | |
10-K | Feb 27, 2023 | Dec 31, 2022 | - | |
SC 13G | Jan 20, 2023 | - | - | |
10-Q | Nov 4, 2022 | Sep 30, 2022 | - |
13F Fund Holdings: Quarterly Trend
Latest: Q1 2026Aggregate KOP share value held by 13F filers tracked by SignalX, by quarter.
- Two Sigma Investments+222.1K (+114%)
- Bank of America Corp+27.4K (+27%)
- Millennium Management+22.5K (+76%)
- Principal Financial Group+19.1K (+16%)
- Dimensional Fund Advisors+17.8K (+2%)
- BlackRock658.4K (-18%)
- Coatue Management17.0K (-75%)
- Citadel Advisors LLC16.6K (-44%)
- Wells Fargo & Co14.1K (-66%)
- State Street Corp12.1K (-2%)
- Franklin Resources+62.4K
- Vanguard Group Inc−1.54M
- Invesco Ltd−212.4K
- JPMorgan Chase & Co−70.0K
Source: 13F-HR filings on SEC EDGAR (aggregated from 204 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe.
Frequently Asked Questions
What are the latest KOP SEC filings in 2026?
Koppers Holdings Inc. (KOP) has filed a 10-K annual report on February 26, 2026, a 10-Q quarterly report on May 8, 2026, an 8-K current report on August 6, 2026 with the SEC. SignalX tracks every new SEC EDGAR filing daily, including 10-K, 10-Q, 8-K, and Form 4 insider transactions, with AI-powered summaries of key sections.
When did KOP file its most recent 10-K annual report?
Koppers Holdings Inc. (KOP) filed its most recent 10-K annual report on February 26, 2026. The 10-K includes audited financial statements, business overview, risk factors, and management discussion, all available on SignalX with AI-generated summaries and XBRL financial data.
How do I view KOP 10-Q quarterly reports?
Koppers Holdings Inc. (KOP)'s most recent 10-Q quarterly report was filed on May 8, 2026. SignalX displays every KOP 10-Q with AI-generated summaries of the MD&A (Management Discussion & Analysis) and Risk Factors sections, plus links to the original SEC EDGAR document.
What 8-K current reports has KOP filed recently?
Koppers Holdings Inc. (KOP)'s most recent 8-K was filed on August 6, 2026. 8-K filings disclose material corporate events such as earnings releases, executive changes, mergers, and other significant developments. SignalX surfaces each 8-K with item-level summaries so you can quickly see what happened.
Where can I find KOP insider trading activity (Form 4)?
SignalX aggregates every KOP Form 4 insider transaction from SEC EDGAR. Form 4 reports show when officers, directors, and 10% shareholders buy or sell company stock, with transaction code, share count, and price per share.
How often does KOP file with the SEC?
Koppers Holdings Inc. (KOP) files a 10-K annual report once per year (typically within 60 days of fiscal year-end) and 10-Q quarterly reports three times per year. 8-K current reports are filed as needed when material events occur, and Form 4 insider transaction reports are due within two business days of a trade. SignalX monitors SEC EDGAR daily to surface every new KOP filing with AI-powered analysis.
What is the difference between 10-K, 10-Q, and 8-K SEC filings?
A 10-K is a comprehensive annual report with audited financials, business overview, and risk factors. A 10-Q is a shorter quarterly report with unaudited financials and management discussion. An 8-K is a current report filed when a material event occurs, such as earnings releases, executive changes, acquisitions, or other significant developments. SignalX provides AI-generated summaries for all three filing types for Koppers Holdings Inc. (KOP).
What is KOP's SEC CIK number?
Koppers Holdings Inc. (KOP)'s SEC CIK (Central Index Key) number is 1315257. The CIK is a unique identifier assigned by the SEC to every filing entity. You can use CIK 1315257 to look up all KOP filings on SEC EDGAR, or browse them here on SignalX with AI-powered analysis.
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