[Form 3] Koppers Holdings Inc. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Koppers Holdings Inc. (KOP) filed a Form 3, the initial statement of beneficial ownership for a director. The filing states the reporting person is a Director and reports 0 shares of common stock beneficially owned in Table I.

No derivative securities are listed in Table II. The event date for this statement is 11/05/2025. The filing includes a remark noting an attached Exhibit 24, Limited Power of Attorney, and is signed by an attorney-in-fact.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Posadas Laura J

(Last) (First) (Middle)

436 SEVENTH AVENUE

(Street)

PITTSBURGH PA 15219

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
11/05/2025

3. Issuer Name and Ticker or Trading Symbol
Koppers Holdings Inc. [ KOP ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Commmon Stock	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Attachment Exhibit 24 - Limited Power of Attorney

	/s/ Stephanie L. Apostolou, Attorney in Fact	11/07/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did KOP file, and why does it matter?

Koppers filed a Form 3, which is an initial disclosure of a reporting person’s beneficial ownership when they become an insider such as a director.

What ownership did the KOP director report on Form 3?

The director reported 0 shares of common stock beneficially owned in Table I.

Are there any derivative securities reported by the KOP director?

No. Table II shows no derivative securities reported.

What is the event date on the KOP Form 3?

The event date disclosed is 11/05/2025.

Is the filing made by one or multiple reporting persons?

The form indicates it was filed by one reporting person.

Who signed the KOP Form 3?

It was signed by /s/ Stephanie L. Apostolou, Attorney-in-Fact.