Apostolou Stephanie L has filed 53 insider transactions across 1 company since January 2023.
Most recent transaction: a grant/award of 7223 shares of Koppers Holdings Inc. ($KOP) on February 26, 2026.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 26, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | A | Common Stock | 7223 | $0.00 | 66,125.0000 | 20,414,000 | 12.26% | 0.04% |
| Feb. 26, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | M | Dividend Equivalent Rights | 174 | $0.00 | 148.0000 | 20,414,000 | 54.04% | 0.00% |
| Feb. 26, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | A | Dividend Equivalent Rights | 174 | $0.00 | 322.0000 | 20,414,000 | 117.57% | 0.00% |
| Feb. 26, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | F | Common Stock | 3149 | $37.24 | 63,150.0000 | 20,414,000 | 4.75% | 0.02% |
| Feb. 26, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | M | Common Stock | 174 | $0.00 | 66,299.0000 | 20,414,000 | 0.26% | 0.00% |
| Jan. 5, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | M | Common Stock | 240 | $0.00 | 64,659.0000 | 20,414,000 | 0.37% | 0.00% |
| Jan. 5, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | M | Common Stock | 4666 | $0.00 | 64,419.0000 | 20,414,000 | 7.81% | 0.02% |
| Jan. 5, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | A | Common Stock | 9876 | $0.00 | 59,753.0000 | 20,414,000 | 19.80% | 0.05% |
| Jan. 5, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | M | Dividend Equivalent Rights | 240 | $0.00 | 148.0000 | 20,414,000 | 61.86% | 0.00% |
| Jan. 2, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | A | Dividend Equivalent Rights | 39 | $0.00 | 388.0000 | 20,414,000 | 11.17% | 0.00% |
| Jan. 2, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | A | Restricted Stock Units | 1335 | $0.00 | 1,335.0000 | 20,414,000 | 9999.99% | 0.01% |
| Jan. 2, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | A | Restricted Stock Units | 1153 | $0.00 | 4,666.0000 | 20,414,000 | 32.82% | 0.01% |
| Jan. 5, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | F | Common Stock | 5757 | $26.93 | 58,902.0000 | 20,414,000 | 8.90% | 0.03% |
| Jan. 5, 2026 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | M | Restricted Stock Units | 4666 | $0.00 | 0.0000 | 20,414,000 | 100.00% | 0.02% |
| Dec. 16, 2025 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | A | Dividend Equivalent Rights | 245 | $0.00 | 349.0000 | 20,414,000 | 235.58% | 0.00% |
| Jan. 3, 2025 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | A | Common Stock | 13628 | $0.00 | 47,662.0000 | 21,291,000 | 40.04% | 0.06% |
| Jan. 3, 2025 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | M | Common Stock | 6867 | $0.00 | 54,529.0000 | 21,291,000 | 14.41% | 0.03% |
| Jan. 3, 2025 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | M | Common Stock | 210 | $0.00 | 54,739.0000 | 21,291,000 | 0.39% | 0.00% |
| Jan. 3, 2025 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | F | Common Stock | 5690 | $31.72 | 49,049.0000 | 21,291,000 | 10.39% | 0.03% |
| Jan. 3, 2025 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | A | Restricted Stock Units | 2630 | $0.00 | 6,867.0000 | 21,291,000 | 62.07% | 0.01% |
| Jan. 3, 2025 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | A | Restricted Stock Units | 1439 | $0.00 | 3,513.0000 | 21,291,000 | 69.38% | 0.01% |
| Jan. 3, 2025 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | A | Dividend Equivalent Rights | 69 | $0.00 | 314.0000 | 21,291,000 | 28.16% | 0.00% |
| Jan. 3, 2025 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | M | Restricted Stock Units | 6867 | $0.00 | 0.0000 | 21,291,000 | 100.00% | 0.03% |
| Jan. 3, 2025 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | Chief Legal&Sus Officer & Sec. | M | Dividend Equivalent Rights | 210 | $0.00 | 104.0000 | 21,291,000 | 66.88% | 0.00% |
| Dec. 16, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Dividend Equivalent Rights | 115 | $0.00 | 245.0000 | 21,448,000 | 88.46% | 0.00% |
| March 1, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Common Stock | 26 | $0.00 | 34,327.0000 | 21,539,000 | 0.08% | 0.00% |
| March 1, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | F | Common Stock | 788 | $52.97 | 33,539.0000 | 21,539,000 | 2.30% | 0.00% |
| March 1, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Dividend Equivalent Rights | 26 | $0.00 | 130.0000 | 21,539,000 | 16.67% | 0.00% |
| Jan. 5, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | F | Common Stock | 4037 | $47.32 | 34,301.0000 | 21,539,000 | 10.53% | 0.02% |
| Jan. 4, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Restricted Stock Units | 2424 | $0.00 | 4,760.0000 | 21,539,000 | 103.77% | 0.01% |
| Jan. 4, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Restricted Stock Units | 3462 | $0.00 | 4,237.0000 | 21,539,000 | 446.71% | 0.02% |
| Jan. 4, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Restricted Stock Units | 2074 | $0.00 | 2,074.0000 | 21,539,000 | 9999.99% | 0.01% |
| Jan. 4, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Dividend Equivalent Rights | 88 | $0.00 | 258.0000 | 21,539,000 | 51.76% | 0.00% |
| Jan. 5, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Dividend Equivalent Rights | 102 | $0.00 | 156.0000 | 21,539,000 | 39.53% | 0.00% |
| Jan. 5, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Restricted Stock Units | 4760 | $0.00 | 0.0000 | 21,539,000 | 100.00% | 0.02% |
| Jan. 4, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Common Stock | 4284 | $0.00 | 33,476.0000 | 21,539,000 | 14.68% | 0.02% |
| Jan. 5, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Common Stock | 4760 | $0.00 | 38,236.0000 | 21,539,000 | 14.22% | 0.02% |
| Jan. 5, 2024 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Common Stock | 102 | $0.00 | 38,338.0000 | 21,539,000 | 0.27% | 0.00% |
| Dec. 12, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Dividend Equivalent Rights | 102 | $0.00 | 170.0000 | 21,313,000 | 150.00% | 0.00% |
| March 3, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Common Stock | 14 | $0.00 | 29,312.0000 | 21,313,000 | 0.05% | 0.00% |
| March 6, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Dividend Equivalent Rights | 3 | $0.00 | 68.0000 | 21,313,000 | 4.23% | 0.00% |
| March 3, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Dividend Equivalent Rights | 14 | $0.00 | 71.0000 | 21,313,000 | 16.47% | 0.00% |
| March 6, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | F | Common Stock | 134 | $35.46 | 28,383.0000 | 21,313,000 | 0.47% | 0.00% |
| March 6, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Common Stock | 3 | $0.00 | 28,517.0000 | 21,313,000 | 0.01% | 0.00% |
| March 3, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | F | Common Stock | 798 | $37.55 | 28,514.0000 | 21,313,000 | 2.72% | 0.00% |
| Jan. 5, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Dividend Equivalent Rights | 14 | $0.00 | 74.0000 | 21,313,000 | 15.91% | 0.00% |
| Jan. 5, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | F | Common Stock | 911 | $28.58 | 29,298.8708 | 21,313,000 | 3.02% | 0.00% |
| Jan. 5, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | M | Common Stock | 14 | $0.00 | 30,209.8708 | 21,313,000 | 0.05% | 0.00% |
| Jan. 5, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Restricted Stock Units | 775 | $0.00 | 775.0000 | 21,313,000 | 9999.99% | 0.00% |
| Jan. 5, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Restricted Stock Units | 931 | $0.00 | 2,336.0000 | 21,313,000 | 66.26% | 0.00% |
| Jan. 5, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Dividend Equivalent Rights | 11 | $0.00 | 85.0000 | 21,313,000 | 14.86% | 0.00% |
| Jan. 3, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Dividend Equivalent Rights | 88 | $0.00 | 88.0000 | 21,313,000 | 9999.99% | 0.00% |
| Jan. 4, 2023 | Koppers Holdings Inc. | $KOP | Apostolou Stephanie L | General Counsel & Secretary | A | Common Stock | 6222 | $0.00 | 30,195.8708 | 21,313,000 | 25.95% | 0.03% |