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Koppers Holdings Inc. (KOP)

Koppers Holdings Inc. (KOP) Insider Trading

Directors, officers and holders of more than 10% of KOP report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 321 transactions on file: 0 with code P, 10 with code S and 40 with other codes.

DateInsiderCodeShares
Sep 14, 2026WILKERSON SONJA MICHELLEA Award29
Sep 14, 2026MOTLEY DAVID LA Award20
Sep 14, 2026Feng XudongA Award33
Sep 14, 2026Sandifer Andrew DA Award14
Aug 31, 2026BALL M LEROYS Sale4,000
Aug 31, 2026BALL M LEROYG Gift200
Aug 19, 2026BALL M LEROYS Sale3,000
Aug 12, 2026Lucas Stephen GS Sale1,308
Aug 11, 2026Sullivan James A.S Sale7,500
Aug 10, 2026Pearce Bradley AS Sale2,000
Aug 7, 2026Sullivan James A.S Sale100
Aug 7, 2026Sullivan James A.S Sale79,900
Jun 18, 2026BALL M LEROYS Sale3,412
Jun 15, 2026Sandifer Andrew DA Award14
Jun 15, 2026WILKERSON SONJA MICHELLEA Award30
Jun 15, 2026Feng XudongA Award34
Jun 15, 2026MOTLEY DAVID LA Award21
Jun 11, 2026BALL M LEROYS Sale4,141
Jun 11, 2026BALL M LEROYG Gift300
Jun 3, 2026Feng XudongG Gift5,695
May 26, 2026Brenner Eric D.A Award6,620
May 13, 2026BALL M LEROYS Sale2,659
May 12, 2026Pearce Bradley AA Award5,000
May 7, 2026Posadas Laura JM Exercise11
May 7, 2026WILKERSON SONJA MICHELLEA Award3,280
May 7, 2026NEUPAVER ALBERT JM Exercise50
May 7, 2026JENSEN TRACI LM Exercise50
May 7, 2026MOTLEY DAVID LA Award3,280
May 7, 2026MOTLEY DAVID LM Exercise50
May 7, 2026Sandifer Andrew DA Award3,280
May 7, 2026Vartanian Nishan J.M Exercise50
May 7, 2026JENSEN TRACI LM Exercise50
May 7, 2026JENSEN TRACI LA Award3,280
May 7, 2026NEUPAVER ALBERT JM Exercise50
May 7, 2026Vartanian Nishan J.M Exercise50
May 7, 2026Feng XudongA Award3,280
May 7, 2026Posadas Laura JM Exercise11
May 7, 2026Posadas Laura JA Award3,280
May 7, 2026MOTLEY DAVID LM Exercise50
May 7, 2026Vartanian Nishan J.A Award3,280
Mar 23, 2026Feng XudongA Award30
Mar 23, 2026JENSEN TRACI LA Award50
Mar 23, 2026NEUPAVER ALBERT JA Award50
Mar 23, 2026Sandifer Andrew DA Award5
Mar 23, 2026Posadas Laura JA Award11
Mar 23, 2026Feng XudongA Award50
Mar 23, 2026MOTLEY DAVID LA Award50
Mar 23, 2026MOTLEY DAVID LA Award25
Mar 23, 2026Sandifer Andrew DA Award50
Mar 23, 2026WILKERSON SONJA MICHELLEA Award50

The full Form 4 history is on the KOP company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.