Sonja Michelle Wilkerson

Insider Reports History

Signature
/s/ Stephanie L. Apostolou, Attorney in Fact
All insider transactions
Transactions in reports broken out by “transaction date” reported in original SEC filing, see here for transactions aggregated across transaction date

Holdings reported by Sonja Michelle Wilkerson:

Stock Role Class Num Shares Value Price $ Report Date Ownership
Koppers Holdings Inc. Director Common Stock 17.2K $526K $30.58 Mar 7, 2025 Direct
Koppers Holdings Inc. Director Restricted Stock Units 14.7K $360K $56.21 May 8, 2025 Direct
Koppers Holdings Inc. Director Dividend Equivalent Rights 222 Sep 15, 2025 Direct

Insider Reports Filed by Sonja Michelle Wilkerson

Symbol Company Period Transactions Value $ Form Type Date Filed Role
KOP Koppers Holdings Inc. Sep 15, 2025 1 $0 4 Sep 17, 2025 Director
KOP Koppers Holdings Inc. May 8, 2025 1 $0 4 May 9, 2025 Director
KOP Koppers Holdings Inc. Mar 24, 2025 2 $0 4 Mar 26, 2025 Director
KOP Koppers Holdings Inc. Dec 16, 2024 1 $0 4 Dec 17, 2024 Director
KOP Koppers Holdings Inc. Sep 16, 2024 1 $0 4 Sep 18, 2024 Director
KOP Koppers Holdings Inc. Jun 10, 2024 1 $0 4 Jun 12, 2024 Director
KOP Koppers Holdings Inc. May 2, 2024 3 $0 4 May 6, 2024 Director
KOP Koppers Holdings Inc. Mar 25, 2024 2 $0 4 Mar 27, 2024 Director
KOP Koppers Holdings Inc. Sep 11, 2023 1 $0 4 Sep 13, 2023 Director
KOP Koppers Holdings Inc. Jun 12, 2023 1 $0 4 Jun 14, 2023 Director
KOP Koppers Holdings Inc. May 4, 2023 4 $0 4/A Mar 11, 2025 Director
KOP Koppers Holdings Inc. Apr 27, 2023 1 $0 4 May 1, 2023 Director
KOP Koppers Holdings Inc. May 5, 2022 1 $0 4 May 5, 2022 Director
KOP Koppers Holdings Inc. May 6, 2021 1 $0 4 May 7, 2021 Director