Koppers Holdings Inc. filings document the regulatory record for a NYSE-listed operating company with common stock trading under KOP. Its Form 8-K reports cover operating results, financial condition, executive officer changes, compensation arrangements, board committee assignments, and costs associated with exit or disposal activities.
Proxy and annual-report filings provide disclosure on governance, director elections, executive compensation, shareholder voting matters, audited financial statements, risk oversight and the company's capital structure. The filings tie these matters to Koppers' treated wood products, wood treatment chemicals and carbon compounds businesses.
Koppers Holdings Inc. (KOP) is the issuer in an amended beneficial-ownership report by Simcoe Capital Management, LLC and affiliated reporting persons. Simcoe Capital Management and its managing member, Jeffrey Jacobowitz, each reported beneficial ownership of 1,063,279 shares, or approximately 5.6%; Simcoe Management Company, LLC reported 1,027,494 shares, or approximately 5.4%. These are overlapping attributed positions: the report says reporting persons may be deemed owners of shares held directly by other reporting persons, while disclaiming beneficial ownership except to the extent of pecuniary interest. Simcoe Partners directly held 873,494 shares, Simcoe Select 154,000, and SDR Partners 35,785. Their respective aggregate purchase prices were approximately $24,977,523, $6,544,634, and $1,213,593, including brokerage commissions. The shares were purchased in open-market purchases with working capital, which may include margin loans made by brokerage firms in the ordinary course of business. The reported percentages are based on 18,911,568 shares outstanding as of July 31, 2026.
Koppers Holdings Inc. common stock: Pzena Investment Management, LLC reported beneficial ownership of 926,505 shares, or 4.9% of the class, as of September 30, 2026. Pzena reported sole voting power over 757,368 shares and sole dispositive power over 926,505 shares; shared voting and dispositive power were each 0. Its clients have the right to receive dividends or sale proceeds, and no one client’s interest relates to more than 5% of the class.
Dimensional Fund Advisors reported beneficial ownership of 1,265,529 shares of Koppers Holdings Inc. common stock, equal to 6.7% of the class, as of September 30, 2026. It reported sole voting power over 1,240,909 shares and sole dispositive power over 1,265,529 shares, with no shared voting or dispositive power.
The reported securities are owned by investment funds for which Dimensional or its subsidiaries provide advisory or management services. Dimensional disclaims beneficial ownership of the securities.
Koppers Holdings Inc. (KOP) reported that director Sonja Michelle Wilkerson acquired 29.352 Dividend Equivalent Rights (DERs) on September 14, 2026 as a grant or award related to deferred compensation. Each DER is economically equivalent to one share of common stock, bringing her directly held DER balance to 385.202. These DERs correspond to additional time-based restricted stock units (RSUs) that will be paid in a lump sum or annual installments after her separation from service, in accordance with the company’s Director Deferred Compensation Plan. No Rule 10b5-1 trading plan is reported for this award.
Koppers Holdings Inc. (KOP) reported that director Xudong Feng acquired 32.946 Dividend Equivalent Rights (DERs) on September 14, 2026, as a grant related to deferred compensation. Following this award, Feng holds 444.837 DERs, each economically equivalent to one share of Koppers Holdings Inc. common stock and tied to corresponding restricted stock units.
Koppers Holdings Inc. (KOP) disclosed that director David L. Motley acquired 19.984 Dividend Equivalent Rights on September 14, 2026, as a grant/award linked to deferred compensation. Each right is the economic equivalent of one share of common stock, bringing his directly held DER balance to 316.148.
The rights correspond to restricted stock units that will become payable in a lump sum or annual installments under the Koppers Holdings Inc. Director Deferred Compensation Plan after Mr. Motley's separation from service or on a later elected May 31 payment date.
Koppers Holdings Inc. (KOP) director Andrew D. Sandifer reported an acquisition of 13.5200 Dividend Equivalent Rights (DERs) on September 14, 2026, tied to deferred compensation restricted stock units (RSUs). Following this grant, he holds 116.8310 DERs, each economically equivalent to one share of Koppers common stock.
The related RSUs will be paid in a lump sum or annual installments according to Sandifer’s prior elections under the Koppers Holdings Inc. Director Deferred Compensation Plan, generally commencing on the May 31 following his separation from service or a later elected May 31. No Rule 10b5-1 trading plan is reported.
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.
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.
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.