| KOP | Koppers Holdings Inc. | Jan 3, 2025 | 9 | -$437K | 4 | Jan 7, 2025 | President and COO | 
        
          | KOP | Koppers Holdings Inc. | Dec 16, 2024 | 1 | $0 | 4 | Dec 18, 2024 | President and COO | 
        
          | KOP | Koppers Holdings Inc. | Mar 5, 2024 | 25 | -$751K | 4 | Mar 7, 2024 | President and COO | 
        
          | KOP | Koppers Holdings Inc. | Mar 4, 2024 | 15 | -$16.1K | 4 | Mar 6, 2024 | President and COO | 
        
          | KOP | Koppers Holdings Inc. | Mar 1, 2024 | 23 | -$291K | 4 | Mar 5, 2024 | President and COO | 
        
          | KOP | Koppers Holdings Inc. | Jan 4, 2024 | 10 | -$531K | 4 | Jan 8, 2024 | President and COO | 
        
          | KOP | Koppers Holdings Inc. | Dec 14, 2023 | 3 | -$15.1K | 4 | Dec 15, 2023 | Ex. VP Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Dec 12, 2023 | 7 | -$547K | 4 | Dec 14, 2023 | Ex. VP Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Dec 8, 2023 | 6 | -$372K | 4 | Dec 12, 2023 | Ex. VP Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Dec 6, 2023 | 6 | -$438K | 4 | Dec 8, 2023 | Ex. VP Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Dec 5, 2023 | 3 | -$380K | 4 | Dec 6, 2023 | Ex. VP Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Mar 3, 2023 | 6 | -$56.4K | 4 | Mar 7, 2023 | EVP, Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Jan 5, 2023 | 6 | -$50.2K | 4 | Jan 9, 2023 | EVP, Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Jan 3, 2023 | 2 | $0 | 4 | Jan 5, 2023 | EVP, Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Mar 4, 2022 | 3 | -$266K | 4 | Mar 8, 2022 | EVP, Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Mar 3, 2022 | 1 | -$30.5K | 4 | Mar 7, 2022 | EVP, Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Mar 2, 2022 | 1 | -$7.24K | 4 | Mar 4, 2022 | EVP, Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Jan 5, 2022 | 2 | $0 | 4/A | Feb 17, 2022 | EVP, Chief Operating Officer | 
        
          | KOP | Koppers Holdings Inc. | Jan 4, 2022 | 2 | $0 | 4 | Jan 6, 2022 | EVP, Chief Operating Officer |