The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 31, 2026 | Ball M Leroy | CEO, Director | Gift(G) | 200 | — | $0 |
| Aug 31, 2026 | Ball M Leroy | CEO, Director | Sell(S) | 4K | $45.96 | $184K |
| Aug 19, 2026 | Ball M Leroy | CEO, Director | Sell(S) | 3K | $45.84 | $138K |
| Aug 12, 2026 | Lucas Stephen G | SVP, Culture and Engagement | Sell(S) | 1K | $44.55 | $58K |
| Aug 11, 2026 | Sullivan James A. | President and CTO | Sell(S) | 8K | $50.00 | $375K |
| Aug 10, 2026 | Pearce Bradley A | CAO | Sell(S) | 2K | $51.01 | $102K |
| Aug 7, 2026 | Sullivan James A. | President and CTO | Sell(S) | 80K | $50.01 | $4.0M |
| Aug 7, 2026 | Sullivan James A. | President and CTO | Sell(S) | 100 | $51.22 | $5K |
| Jun 18, 2026 | Ball M Leroy | CEO, Director | Sell(S) | 3K | $43.90 | $150K |
| Jun 15, 2026 | Feng Xudong | Director | Grant(A) | 34 | — | $0 |
| Jun 15, 2026 | Wilkerson Sonja Michelle | Director | Grant(A) | 30 | — | $0 |
| Jun 15, 2026 | Motley David L | Director | Grant(A) | 21 | — | $0 |
| Jun 15, 2026 | Sandifer Andrew D | Director | Grant(A) | 14 | — | $0 |
| Jun 11, 2026 | Ball M Leroy | CEO, Director | Sell(S) | 4K | $41.34 | $171K |
| Jun 11, 2026 | Ball M Leroy | CEO, Director | Gift(G) | 300 | — | $0 |
| Jun 3, 2026 | Feng Xudong | Director | Gift(G) | 6K | — | $0 |
| May 26, 2026 | Brenner Eric D. | CFO and Treasurer | Grant(A) | 7K | — | $0 |
| May 13, 2026 | Ball M Leroy | CEO, Director | Sell(S) | 3K | $42.55 | $113K |
| May 12, 2026 | Pearce Bradley A | Interim CFO and CAO | Grant(A) | 5K | — | $0 |
| May 7, 2026 | Feng Xudong | Director | Grant(A) | 3K | — | $0 |
| May 7, 2026 | Jensen Traci L | Director | Option exercise(M) | 50 | — | $0 |
| May 7, 2026 | Jensen Traci L | Director | Grant(A) | 3K | — | $0 |
| May 7, 2026 | Jensen Traci L | Director | Option exercise(M) | 50 | — | $0 |
| May 7, 2026 | Neupaver Albert J | Director | Option exercise(M) | 50 | — | $0 |
| May 7, 2026 | Neupaver Albert J | Director | Option exercise(M) | 50 | — | $0 |
| May 7, 2026 | Wilkerson Sonja Michelle | Director | Grant(A) | 3K | — | $0 |
| May 7, 2026 | Vartanian Nishan J. | Director | Option exercise(M) | 50 | — | $0 |
| May 7, 2026 | Vartanian Nishan J. | Director | Grant(A) | 3K | — | $0 |
| May 7, 2026 | Vartanian Nishan J. | Director | Option exercise(M) | 50 | — | $0 |
| May 7, 2026 | Motley David L | Director | Option exercise(M) | 50 | — | $0 |
| May 7, 2026 | Motley David L | Director | Option exercise(M) | 50 | — | $0 |
| May 7, 2026 | Motley David L | Director | Grant(A) | 3K | — | $0 |
| May 7, 2026 | Sandifer Andrew D | Director | Grant(A) | 3K | — | $0 |
| May 7, 2026 | Posadas Laura J | Director | Option exercise(M) | 11 | — | $0 |
| May 7, 2026 | Posadas Laura J | Director | Grant(A) | 3K | — | $0 |
| May 7, 2026 | Posadas Laura J | Director | Option exercise(M) | 11 | — | $0 |
| Mar 23, 2026 | Neupaver Albert J | Director | Grant(A) | 50 | — | $0 |
| Mar 23, 2026 | Feng Xudong | Director | Grant(A) | 50 | — | $0 |
| Mar 23, 2026 | Feng Xudong | Director | Grant(A) | 30 | — | $0 |
| Mar 23, 2026 | Wilkerson Sonja Michelle | Director | Grant(A) | 50 | — | $0 |
| Mar 23, 2026 | Wilkerson Sonja Michelle | Director | Grant(A) | 25 | — | $0 |
| Mar 23, 2026 | Jensen Traci L | Director | Grant(A) | 50 | — | $0 |
| Mar 23, 2026 | Vartanian Nishan J. | Director | Grant(A) | 50 | — | $0 |
| Mar 23, 2026 | Motley David L | Director | Grant(A) | 50 | — | $0 |
| Mar 23, 2026 | Motley David L | Director | Grant(A) | 25 | — | $0 |
| Mar 23, 2026 | Sandifer Andrew D | Director | Grant(A) | 50 | — | $0 |
| Mar 23, 2026 | Sandifer Andrew D | Director | Grant(A) | 5 | — | $0 |
| Mar 23, 2026 | Posadas Laura J | Director | Grant(A) | 11 | — | $0 |
| Mar 17, 2026 | Ball M Leroy | CEO, Director | Gift(G) | 1K | — | $0 |
| Mar 17, 2026 | Ball M Leroy | CEO, Director | Sell(S) | 2K | $37.91 | $94K |
| Mar 2, 2026 | Ball M Leroy | CEO, Director | Sell(S) | 2K | $36.53 | $80K |
| Mar 2, 2026 | Ball M Leroy | CEO, Director | Gift(G) | 325 | — | $0 |
| Mar 2, 2026 | Ball M Leroy | CEO, Director | Sell(S) | 4K | $37.02 | $139K |
| Mar 2, 2026 | Ball M Leroy | CEO, Director | Sell(S) | 328 | $37.45 | $12K |
| Feb 26, 2026 | Ball M Leroy | CEO, Director | Grant(A) | 50K | — | $0 |
| Feb 26, 2026 | Ball M Leroy | CEO, Director | Option exercise(M) | 1K | — | $0 |
| Feb 26, 2026 | Ball M Leroy | CEO, Director | Tax withholding(F) | 22K | $37.24 | $828K |
| Feb 26, 2026 | Ball M Leroy | CEO, Director | Grant(A) | 1K | — | $0 |
| Feb 26, 2026 | Ball M Leroy | CEO, Director | Option exercise(M) | 1K | — | $0 |
| Feb 26, 2026 | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | Grant(A) | 7K | — | $0 |
| Feb 26, 2026 | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | Option exercise(M) | 174 | — | $0 |
| Feb 26, 2026 | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | Tax withholding(F) | 3K | $37.24 | $117K |
| Feb 26, 2026 | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | Grant(A) | 174 | — | $0 |
| Feb 26, 2026 | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | Option exercise(M) | 174 | — | $0 |
| Feb 26, 2026 | Sullivan James A. | President and CTO | Option exercise(M) | 466 | — | $0 |
| Feb 26, 2026 | Sullivan James A. | President and CTO | Grant(A) | 19K | — | $0 |
| Feb 26, 2026 | Sullivan James A. | President and CTO | Tax withholding(F) | 9K | $37.24 | $320K |
| Feb 26, 2026 | Sullivan James A. | President and CTO | Option exercise(M) | 466 | — | $0 |
| Feb 26, 2026 | Sullivan James A. | President and CTO | Grant(A) | 466 | — | $0 |
| Feb 26, 2026 | Pearce Bradley A | Interim CFO and CAO | Option exercise(M) | 82 | — | $0 |
| Feb 26, 2026 | Pearce Bradley A | Interim CFO and CAO | Grant(A) | 3K | — | $0 |
| Feb 26, 2026 | Pearce Bradley A | Interim CFO and CAO | Tax withholding(F) | 1K | $37.24 | $55K |
| Feb 26, 2026 | Pearce Bradley A | Interim CFO and CAO | Option exercise(M) | 82 | — | $0 |
| Feb 26, 2026 | Pearce Bradley A | Interim CFO and CAO | Grant(A) | 82 | — | $0 |
| Feb 26, 2026 | Lucas Stephen G | SVP, Culture and Engagement | Grant(A) | 5K | — | $0 |
| Feb 26, 2026 | Lucas Stephen G | SVP, Culture and Engagement | Option exercise(M) | 127 | — | $0 |
| Feb 26, 2026 | Lucas Stephen G | SVP, Culture and Engagement | Tax withholding(F) | 3K | $37.24 | $94K |
| Feb 26, 2026 | Lucas Stephen G | SVP, Culture and Engagement | Grant(A) | 127 | — | $0 |
| Feb 26, 2026 | Lucas Stephen G | SVP, Culture and Engagement | Option exercise(M) | 127 | — | $0 |
| Feb 26, 2026 | Lovalekar Tushar | VP, Information Technology | Option exercise(M) | 53 | — | $0 |
| Feb 26, 2026 | Lovalekar Tushar | VP, Information Technology | Grant(A) | 2K | — | $0 |
| Feb 26, 2026 | Lovalekar Tushar | VP, Information Technology | Tax withholding(F) | 1K | $37.24 | $38K |
| Feb 26, 2026 | Lovalekar Tushar | VP, Information Technology | Grant(A) | 53 | — | $0 |
| Feb 26, 2026 | Lovalekar Tushar | VP, Information Technology | Option exercise(M) | 53 | — | $0 |
| Feb 18, 2026 | Ball M Leroy | CEO, Director | Option exercise(M) | 31K | $18.11 | $556K |
| Feb 18, 2026 | Ball M Leroy | CEO, Director | Tax withholding(F) | 22K | $35.06 | $781K |
| Feb 18, 2026 | Ball M Leroy | CEO, Director | Option exercise(M) | 31K | — | $0 |
| Feb 10, 2026 | Ball M Leroy | CEO, Director | Option exercise(M) | 30K | $18.11 | $543K |
| Feb 10, 2026 | Ball M Leroy | CEO, Director | Tax withholding(F) | 22K | $33.20 | $738K |
| Feb 10, 2026 | Ball M Leroy | CEO, Director | Option exercise(M) | 30K | — | $0 |
| Jan 5, 2026 | Ball M Leroy | CEO, Director | Option exercise(M) | 65K | — | $0 |
| Jan 5, 2026 | Ball M Leroy | CEO, Director | Option exercise(M) | 2K | — | $0 |
| Jan 5, 2026 | Ball M Leroy | CEO, Director | Grant(A) | 27K | — | $0 |
| Jan 5, 2026 | Ball M Leroy | CEO, Director | Tax withholding(F) | 40K | $26.93 | $1.1M |
| Jan 5, 2026 | Ball M Leroy | CEO, Director | Option exercise(M) | 2K | — | $0 |
| Jan 5, 2026 | Ball M Leroy | CEO, Director | Option exercise(M) | 65K | — | — |
| Jan 5, 2026 | Sullivan James A. | President and CTO | Option exercise(M) | 12K | — | — |
| Jan 5, 2026 | Sullivan James A. | President and CTO | Tax withholding(F) | 14K | $26.93 | $368K |
| Jan 5, 2026 | Sullivan James A. | President and CTO | Option exercise(M) | 622 | — | $0 |
| Jan 5, 2026 | Sullivan James A. | President and CTO | Grant(A) | 22K | — | $0 |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Issuer: Koppers Holdings Inc., SEC CIK 0001315257. The symbol on a Form 4 is typed by the filer, so this page follows the issuer with the newest filing under KOP and shows every filing by that issuer.
Coverage: Form 4 filings indexed 2006-01-02 → 2026-09-05. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for KOP