NPK International Inc. (NYSE: NPKI) (“NPK” or the “Company”) today announced that it will issue third quarter 2025 results after the U.S. markets close on Thursday, October 30, 2025. A conference call will be held the following day on Friday, October 31, 2025, at 9:30 a.m. ET to review the Company’s financial results and conduct a question-and-answer session.

A webcast of the conference call and accompanying presentation materials will be available in the Investor Relations section of the Company’s website at https://investors.npki.com/. To listen to a live broadcast, go to the site at least 15 minutes prior to the scheduled start time in order to register, download and install any necessary audio software. Individuals can also participate by teleconference dial-in.

To participate in the live teleconference:

Domestic Live:         800-715-9871

International Live:   646-307-1963

Conference ID:        8869084

To listen to a replay of the teleconference, which subsequently will be available through November 7, 2025.

Domestic Replay:         800-770-2030

International Replay:   647-362-9199

ABOUT NPK INTERNATIONAL

NPK International Inc. is a site access solutions company that manufactures, sells, and rents industry-leading sustainable composite matting products, along with a full suite of services, including planning, logistics, and site restoration. The Company delivers superior quality and reliability across critical infrastructure markets, including electrical transmission & distribution, oil and gas exploration, pipeline, renewable energy, petrochemical, construction, and other industries. For more information, visit our website at www.npki.com.

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