Boardroom Alpha
Start trial
10-K primary document
KOP · Annual Report (Form 10-K) · Filed February 26, 2026

Koppers Holdings Inc — 10-K exhibit

a202510-kex24.htm
Koppers Holdings Inc on Boardroom Alpha
Document
Exhibit 24


KOPPERS HOLDINGS INC.
POWER OF ATTORNEY
(10-K)

I, Xudong Feng, Ph.D., a Director of Koppers Holdings Inc. (the “Corporation”), a Pennsylvania corporation, hereby constitute and appoint Leroy M. Ball and Bradley A. Pearce, or either of them, my true and lawful attorneys or attorneys-in-fact, with the full power of substitution and revocation,

(i)to sign, in my name and on my behalf as a Director of the Corporation, the Corporation’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, to be filed with the Securities and Exchange Commission, Washington, DC,

(ii)to sign, in my name and on my behalf as a Director of the Corporation any amendment to the Annual Report referred to in (i) above, or to any previously filed Annual Report on Form 10-K for any prior fiscal year, and

(iii)to file the documents described in (i) and (ii) above and all exhibits thereto and any and all other documents in connection therewith,

granting unto each said attorney or attorney-in-fact full power and authority to do and perform every act and thing requisite, necessary or desirable to be done in connection therewith, as fully to all intents and purposes as I might or could do in person, hereby ratifying and confirming all that said attorneys and attorneys-in-fact, or either of them, or their or his substitutes or substitute, may lawfully do or cause to be done by virtue hereof.

Witness my hand this 11th day of February, 2026.

 
 
/s/ Xudong Feng, Ph.D.
Xudong Feng, Ph.D.





KOPPERS HOLDINGS INC.
POWER OF ATTORNEY
(10-K)

I, Traci L. Jensen, a Director of Koppers Holdings Inc. (the “Corporation”), a Pennsylvania corporation, hereby constitute and appoint Leroy M. Ball and Bradley A. Pearce, or either of them, my true and lawful attorneys or attorneys-in-fact, with the full power of substitution and revocation,

(i)to sign, in my name and on my behalf as a Director of the Corporation, the Corporation’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, to be filed with the Securities and Exchange Commission, Washington, DC,

(ii)to sign, in my name and on my behalf as a Director of the Corporation any amendment to the Annual Report referred to in (i) above, or to any previously filed Annual Report on Form 10-K for any prior fiscal year, and

(iii)to file the documents described in (i) and (ii) above and all exhibits thereto and any and all other documents in connection therewith,

granting unto each said attorney or attorney-in-fact full power and authority to do and perform every act and thing requisite, necessary or desirable to be done in connection therewith, as fully to all intents and purposes as I might or could do in person, hereby ratifying and confirming all that said attorneys and attorneys-in-fact, or either of them, or their or his substitutes or substitute, may lawfully do or cause to be done by virtue hereof.

Witness my hand this 11th day of February, 2026.

 
 
/s/ Traci L. Jensen
Traci L. Jensen



KOPPERS HOLDINGS INC.
POWER OF ATTORNEY
(10-K)

I, David L. Motley, a Director of Koppers Holdings Inc. (the “Corporation”), a Pennsylvania corporation, hereby constitute and appoint Leroy M. Ball and Bradley A. Pearce, or either of them, my true and lawful attorneys or attorneys-in-fact, with the full power of substitution and revocation,

(i)to sign, in my name and on my behalf as a Director of the Corporation, the Corporation’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, to be filed with the Securities and Exchange Commission, Washington, DC,

(ii)to sign, in my name and on my behalf as a Director of the Corporation any amendment to the Annual Report referred to in (i) above, or to any previously filed Annual Report on Form 10-K for any prior fiscal year, and

(iii)to file the documents described in (i) and (ii) above and all exhibits thereto and any and all other documents in connection therewith,

granting unto each said attorney or attorney-in-fact full power and authority to do and perform every act and thing requisite, necessary or desirable to be done in connection therewith, as fully to all intents and purposes as I might or could do in person, hereby ratifying and confirming all that said attorneys and attorneys-in-fact, or either of them, or their or his substitutes or substitute, may lawfully do or cause to be done by virtue hereof.

Witness my hand this 11th day of February, 2026.

 
 
/s/ David L. Motley
David L. Motley





KOPPERS HOLDINGS INC.
POWER OF ATTORNEY
(10-K)

I, Albert J. Neupaver, a Director of Koppers Holdings Inc. (the “Corporation”), a Pennsylvania corporation, hereby constitute and appoint Leroy M. Ball and Bradley A. Pearce, or either of them, my true and lawful attorneys or attorneys-in-fact, with the full power of substitution and revocation,

(i)to sign, in my name and on my behalf as a Director of the Corporation, the Corporation’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, to be filed with the Securities and Exchange Commission, Washington, DC,

(ii)to sign, in my name and on my behalf as a Director of the Corporation any amendment to the Annual Report referred to in (i) above, or to any previously filed Annual Report on Form 10-K for any prior fiscal year, and

(iii)to file the documents described in (i) and (ii) above and all exhibits thereto and any and all other documents in connection therewith,

granting unto each said attorney or attorney-in-fact full power and authority to do and perform every act and thing requisite, necessary or desirable to be done in connection therewith, as fully to all intents and purposes as I might or could do in person, hereby ratifying and confirming all that said attorneys and attorneys-in-fact, or either of them, or their or his substitutes or substitute, may lawfully do or cause to be done by virtue hereof.

Witness my hand this 11th day of February, 2026.

 
 
/s/ Albert J. Neupaver
Albert J. Neupaver



KOPPERS HOLDINGS INC.
POWER OF ATTORNEY
(10-K)

I, Laura J. Posadas, a Director of Koppers Holdings Inc. (the “Corporation”), a Pennsylvania corporation, hereby constitute and appoint Leroy M. Ball and Bradley A. Pearce, or either of them, my true and lawful attorneys or attorneys-in-fact, with the full power of substitution and revocation,

(i)to sign, in my name and on my behalf as a Director of the Corporation, the Corporation’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, to be filed with the Securities and Exchange Commission, Washington, DC,

(ii)to sign, in my name and on my behalf as a Director of the Corporation any amendment to the Annual Report referred to in (i) above, or to any previously filed Annual Report on Form 10-K for any prior fiscal year, and

(iii)to file the documents described in (i) and (ii) above and all exhibits thereto and any and all other documents in connection therewith,

granting unto each said attorney or attorney-in-fact full power and authority to do and perform every act and thing requisite, necessary or desirable to be done in connection therewith, as fully to all intents and purposes as I might or could do in person, hereby ratifying and confirming all that said attorneys and attorneys-in-fact, or either of them, or their or his substitutes or substitute, may lawfully do or cause to be done by virtue hereof.

Witness my hand this 11th day of February, 2026.

 
 
/s/ Laura J. Posadas
Laura J. Posadas



KOPPERS HOLDINGS INC.
POWER OF ATTORNEY
(10-K)

I, Andrew D. Sandifer, a Director of Koppers Holdings Inc. (the “Corporation”), a Pennsylvania corporation, hereby constitute and appoint Leroy M. Ball and Bradley A. Pearce, or either of them, my true and lawful attorneys or attorneys-in-fact, with the full power of substitution and revocation,

(i)to sign, in my name and on my behalf as a Director of the Corporation, the Corporation’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, to be filed with the Securities and Exchange Commission, Washington, DC,

(ii)to sign, in my name and on my behalf as a Director of the Corporation any amendment to the Annual Report referred to in (i) above, or to any previously filed Annual Report on Form 10-K for any prior fiscal year, and

(iii)to file the documents described in (i) and (ii) above and all exhibits thereto and any and all other documents in connection therewith,

granting unto each said attorney or attorney-in-fact full power and authority to do and perform every act and thing requisite, necessary or desirable to be done in connection therewith, as fully to all intents and purposes as I might or could do in person, hereby ratifying and confirming all that said attorneys and attorneys-in-fact, or either of them, or their or his substitutes or substitute, may lawfully do or cause to be done by virtue hereof.

Witness my hand this 11th day of February, 2026.

 
 
/s/ Andrew D. Sandifer
Andrew D. Sandifer



KOPPERS HOLDINGS INC.
POWER OF ATTORNEY
(10-K)

I, Nishan J. Vartanian, a Director of Koppers Holdings Inc. (the “Corporation”), a Pennsylvania corporation, hereby constitute and appoint Leroy M. Ball and Bradley A. Pearce, or either of them, my true and lawful attorneys or attorneys-in-fact, with the full power of substitution and revocation,

(i)to sign, in my name and on my behalf as a Director of the Corporation, the Corporation’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, to be filed with the Securities and Exchange Commission, Washington, DC,

(ii)to sign, in my name and on my behalf as a Director of the Corporation any amendment to the Annual Report referred to in (i) above, or to any previously filed Annual Report on Form 10-K for any prior fiscal year, and

(iii)to file the documents described in (i) and (ii) above and all exhibits thereto and any and all other documents in connection therewith,

granting unto each said attorney or attorney-in-fact full power and authority to do and perform every act and thing requisite, necessary or desirable to be done in connection therewith, as fully to all intents and purposes as I might or could do in person, hereby ratifying and confirming all that said attorneys and attorneys-in-fact, or either of them, or their or his substitutes or substitute, may lawfully do or cause to be done by virtue hereof.

Witness my hand this 11th day of February, 2026.

 
 
/s/ Nishan J. Vartanian
Nishan J. Vartanian




KOPPERS HOLDINGS INC.
POWER OF ATTORNEY
(10-K)

I, Sonja M. Wilkerson, a Director of Koppers Holdings Inc. (the “Corporation”), a Pennsylvania corporation, hereby constitute and appoint Leroy M. Ball and Bradley A. Pearce, or either of them, my true and lawful attorneys or attorneys-in-fact, with the full power of substitution and revocation,

(i)to sign, in my name and on my behalf as a Director of the Corporation, the Corporation’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, to be filed with the Securities and Exchange Commission, Washington, DC,

(ii)to sign, in my name and on my behalf as a Director of the Corporation any amendment to the Annual Report referred to in (i) above, or to any previously filed Annual Report on Form 10-K for any prior fiscal year, and

(iii)to file the documents described in (i) and (ii) above and all exhibits thereto and any and all other documents in connection therewith,

granting unto each said attorney or attorney-in-fact full power and authority to do and perform every act and thing requisite, necessary or desirable to be done in connection therewith, as fully to all intents and purposes as I might or could do in person, hereby ratifying and confirming all that said attorneys and attorneys-in-fact, or either of them, or their or his substitutes or substitute, may lawfully do or cause to be done by virtue hereof.

Witness my hand this 11th day of February, 2026.

 
 
/s/ Sonja M. Wilkerson
Sonja M. Wilkerson


Disclaimer

The opinions and information contained herein have been obtained or derived from sources believed to be reliable, but Boardroom Alpha cannot guarantee its accuracy and completeness, and that of the opinions based thereon.

This report contains opinions and is provided for informational purposes only – it does not constitute investment, legal or tax advice. You should not rely solely upon the research herein for purposes of transacting securities or other investments, and you are encouraged to conduct your own research and due diligence, and to seek the advice of a qualified securities professional before you make any investment.

None of the information contained in this report constitutes, or is intended to constitute a recommendation by Boardroom Alpha of any particular security or trading strategy or a determination by Boardroom Alpha that any security or trading strategy is suitable for any specific person. To the extent any of the information contained herein may be deemed to be investment advice, such information is impersonal and not tailored to the investment needs of any specific person.

No representation or warranty, expressed or implied, is made on behalf of Boardroom Alpha as to the accuracy or completeness of the information contained herein. Boardroom Alpha does not accept any liability for any direct, indirect or consequential loss or damage suffered by any person as a result of relying on all or any part of this research and any liability is expressly disclaimed.

Full disclaimer