NPK International Inc.

The Board of Directors also has adopted a Code of Ethics for Senior Officers and Directors that applies to all of our directors, our principal executive officer, principal financial officer, principal accounting officer or controller, and other senior officers. The Code of Ethics for Senior Officers and Directors contains policies and procedures applicable to our directors and, as to our senior officers, supplements our Code of Business Ethics and Conduct, which is applicable to all of our employees (together with the Code of Ethics for Senior Officers and Directors, the “Codes”). The purposes of the Codes, among other matters, are to deter wrongdoing and to promote honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships. The Codes are designed to promote full, fair, accurate, timely and understandable disclosure in reports and other documents that we file with, or submit to, the SEC and in other public communications. The Codes also require compliance with applicable governmental laws, rules and regulations, including, without limitation, insider trading laws. The Codes further require the prompt internal reporting of violations of the Codes to an appropriate person or persons and accountability for adherence to the Codes.

To the extent required any amendments to, or waivers of, the Codes with respect to our executive officers and directors will be disclosed on our website within four business days following the date of the amendment or waiver.

Copies of our Code of Ethics for Senior Officers and Directors and our Code of Business Ethics and Conduct are available on our website atwww.npki.com/governance and are also available in print upon request from our Corporate Secretary.