Latest filing published 02 Mar 2026 for Koppers Holdings Inc..
Insider track record
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Stephanie L. Apostolou: trading record in brief
Stephanie L. Apostolou is a declared insider of Koppers Holdings Inc. (chief executive), with filings sourced from SEC (Form 4). Over a trading history stretching from 4 January 2021 to 26 February 2026, the count stands at 34 filings.
Not one of the filings records a straightforward purchase or sale on the market. Such operations are usually part of compensation schedules, which makes them a weaker signal than an open-market trade.
The newest entry dates from 2 March 2026: an option exercise, in Koppers Holdings Inc. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 4 days. US insiders must file a Form 4 within two business days of a trade. These figures are compiled from regulatory filings published by SEC (Form 4). They describe what insiders did and are not a recommendation.
Companies and markets linked to Stephanie L. Apostolou
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
- 7,223 shares0Common StockSEC:0001315257-26-000014:0
- 9,876 shares0Common StockSEC:0001806249-26-000002:0
- 5,690 shares@ US$31.7272.3% of flowCommon StockSEC:0000950170-25-002821:3
- 13,628 shares0Common StockSEC:0000950170-25-002821:0
- 210 shares0Common StockSEC:0000950170-25-002821:2
- 6,867 sharesCommon StockSEC:0000950170-25-002821:1
- 26 shares0Common StockSEC:0000950170-24-026130:0
- 4,284 shares0Common StockSEC:0000950170-24-003149:0
- 798 shares@ US$37.5511.6% of flowCommon StockSEC:0001209191-23-016831:1
- 134 shares@ US$35.461.8% of flowCommon StockSEC:0001209191-23-016831:3
- 14 shares0Common StockSEC:0001209191-23-016831:0
- 3 shares0Common StockSEC:0001209191-23-016831:2
- 14 shares0Common StockSEC:0001209191-23-002599:0
- 6,222 shares0Common StockSEC:0001209191-23-002069:0
- 3,514 sharesCommon StockSEC:0001209191-22-016989:0
- 801 shares@ US$28.968.6% of flowCommon StockSEC:0001209191-22-016594:0
- 45 shares@ US$28.490.5% of flowCommon StockSEC:0001209191-22-016297:0
- 429 shares@ US$33.275.2% of flowCommon StockSEC:0001209191-22-002526:0
- 3,204 shares0Common StockSEC:0001209191-22-002113:0
19 of 19 declarations
