Andrew D. Sandifer - 07 May 2026 Form 4 Insider Report for Koppers Holdings Inc. (KOP)

Reporting relationship: Director
Issuer ticker: KOP
Reported as of: 07 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 11 May 2026, 16:15:13 UTC
Prior SEC filing: 25 Mar 2026
Next SEC filing: 17 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Stephanie L. Apostolou, Attorney in Fact

Key filing fact

Andrew D. Sandifer filed Form 4 for Koppers Holdings Inc. (KOP) on 11 May 2026.

Key facts

This page summarizes Andrew D. Sandifer's Form 4 filing for Koppers Holdings Inc. (KOP).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 11 May 2026, 16:15.

Change

Previous filing in this sequence was filed on 25 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001739998 Primary reporting owner

Sandifer Andrew D

Relationship: Director
Address: 436 SEVENTH AVENUE, PITTSBURGH
Signature: /s/ Stephanie L. Apostolou, Attorney in Fact
Signature date: 11 May 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

KOP transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +3,280
Change %: +48%
Price: $0.000000^*
Shares after: 10,137
Date: 07 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 3,280
Exercise price
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Restricted Stock Units ("RSUs") represent the right to receive shares of common stock on a one-for-one basis.

Footnote F2

The RSUs become payable according to the election of payment designation that was filed by the reporting person subject to the Koppers Holdings Inc. Director Deferred Compensation Plan (the "Plan"). Such payment will be either lump sum or in annual installments commencing on the May 31st next following the reporting person's separation from service (as defined under the Plan) or, if later, and elected by the reporting person at the time he/she first elects to defer any payment under the Plan, May 31st of the year specified by the reporting person.