Clearwater Paper Corporation

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act, Sherri J. Baker or Rebecca A. Barckley, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2023, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 20, 2024.

/s/ Alexander Toeldte

Alexander Toeldte

Clearwater Paper Corporation

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act, Sherri J. Baker or Rebecca A. Barckley, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2023, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 20, 2024.

/s/ Kevin J. Hunt

Kevin Hunt

Clearwater Paper Corporation

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act, Sherri J. Baker or Rebecca A. Barckley, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2023, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 20, 2024.

/s/ John J. Corkrean

John J. Corkrean

Clearwater Paper Corporation

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act, Sherri J. Baker or Rebecca A. Barckley, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2023, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 20, 2024.

/s/ Joe W. Laymon

Joe W. Laymon

Clearwater Paper Corporation

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act, Sherri J. Baker or Rebecca A. Barckley, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2023, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 20, 2024.

/s/ Ann C. Nelson

Ann C. Nelson

Clearwater Paper Corporation

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act, Sherri J. Baker or Rebecca A. Barckley, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2023, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 20, 2024.

/s/ John P. O'Donnell

John P. O'Donnell

Clearwater Paper Corporation

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act, Sherri J. Baker or Rebecca A. Barckley, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2023, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 20, 2024.

/s/ Christine M. Vickers Tucker

Christine M. Vickers Tucker

Clearwater Paper Corporation

Power of Attorney

I, the undersigned, appoint Michael S. Gadd or, in his absence or inability to act, Sherri J. Baker or Rebecca A. Barckley, my attorney-in-fact for me and in my name, place and stead to execute for me on my behalf in my capacity as a Director of Clearwater Paper Corporation, the Annual Report on Form 10-K of Clearwater Paper Corporation for the fiscal year ended December 31, 2023, to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, and any and all amendments thereto, hereby ratifying, approving and confirming all that any such attorney-in-fact may do by virtue of this Power of Attorney.

IN WITNESS WHEREOF, I have executed this Power of Attorney effective as of February 20, 2024.

/s/ Jeanne M. Hillman

Jeanne M. Hillman