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Koppers Holdings Inc. (KOP) SEC Filings

KOP NYSE

Welcome to our dedicated page for Koppers Holdings SEC filings (Ticker: KOP), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.

Our SEC filing database is enhanced with expert analysis from Rhea-AI, providing insights into the potential impact of each filing on Koppers Holdings's stock performance. Each filing includes a concise AI-generated summary, sentiment and impact scores, and end-of-day stock performance data showing the actual market reaction. Navigate easily through different filing types including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, proxy statements (DEF 14A), and Form 4 insider trading disclosures.

Designed for fundamental investors and regulatory compliance professionals, our page simplifies access to critical SEC filings. By combining real-time SEC filing updates, Rhea-AI's analytical insights, and historical stock performance data, we provide comprehensive visibility into Koppers Holdings's regulatory disclosures and financial reporting.

Rhea-AI Summary

Koppers Holdings Inc. (KOP) reported insider transactions by CEO and director M. Leroy Ball. On 2026-08-31, he sold 4,000 shares of Common Stock at $45.96 per share in an open-market or private transaction and disposed of 200 shares as a bona fide gift. No post-transaction share balance is stated.

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Koppers Holdings Inc. (KOP) reported that CEO and director M. Leroy Ball sold 3,000 shares of common stock on 2026-08-19 in an open market or private transaction at $45.84 per share. After this sale, Ball directly owns 433,555.4007 shares, which include 312 shares acquired through the company’s Employee Stock Purchase Plan on June 30, 2026.

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Koppers Holdings Inc. senior vice president Stephen G. Lucas reported a sale of common stock. On 2026-08-12, he sold 1,308 shares in an open-market or private transaction at a weighted average price of $44.55 per share, with individual trade prices ranging from $44.52 to $44.59. Following this transaction, he directly holds 34,345 common shares of Koppers.

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Koppers Holdings Inc. President and CTO James A. Sullivan reported a sale of 7,500 shares of Common Stock on August 11, 2026, in a transaction classified as a sale in open market or private transaction at $50.00 per share. Following this sale, Sullivan directly holds 82,897.738 shares of Koppers Holdings Inc. Common Stock.

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Koppers Holdings Inc. insider Bradley A. Pearce, Chief Accounting Officer, reported selling 2,000 shares of common stock on 2026-08-10 in a sale classified as an open market or private transaction at $51.01 per share. Following this transaction, Pearce directly holds 41,037 shares of Koppers common stock. The Rule 10b5-1 trading-plan checkbox was not marked as applicable.

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Koppers Holdings Inc. President and CTO James A. Sullivan reported selling a total of 80,000 shares of common stock on August 7, 2026. The sale included 79,900 shares at a weighted average price of $50.01 per share in multiple trades ranging from $50.00 to $50.28, and an additional 100 shares at $51.22 per share in a separate open-market or private transaction.

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Koppers Holdings (symbol KOP) reports that insider James A. Sullivan plans to sell up to 7,500 shares of common stock through Fidelity Brokerage Services LLC on the NYSE, tied to prior restricted stock vesting awards from 2016–2025. The filing also lists a recent sale of 80,000 common shares for $4,000,668.23 on August 7, 2026. Shares outstanding were 18,911,568, providing context for the size of these transactions.

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A shareholder of KOP filed to sell common stock under Rule 144. The planned transaction involves 2,000 common shares held at Fidelity Brokerage Services, with an aggregate value of $102,020.00, and lists the NYSE as the trading venue with an anticipated sale date of August 10, 2026.

The filing also lists prior equity awards: restricted stock vesting events of 1,500 shares on January 5, 2024 and 500 shares on March 1, 2024, both characterized as compensation from the issuer.

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Rhea-AI Summary

Koppers Holdings Inc. (KOP) filed to permit the sale of 80,000 shares of common stock through Fidelity Brokerage Services LLC on or after August 7, 2026 on the NYSE. The filing lists an aggregate market value of approximately $4,000,668.23 for these shares and notes 18,911,568 shares of common stock outstanding.

The seller’s position was built over time through multiple restricted stock vesting events, employee stock purchase plan (ESPP) purchases, and a stock option exercise, spanning dates from 2017 through 2025. These historical acquisitions are summarized to support the availability of shares for the planned sale.

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FAQ

How many Koppers Holdings (KOP) SEC filings are available on StockTitan?

StockTitan tracks 101 SEC filings for Koppers Holdings (KOP), including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, and Form 4 insider trading disclosures. Each filing includes AI-generated summaries, impact scoring, and sentiment analysis.

When was the most recent SEC filing for Koppers Holdings (KOP)?

The most recent SEC filing for Koppers Holdings (KOP) was filed on September 1, 2026.