FORM 10-K

Company

NPK International Inc.

Filed

February 22, 2019

Period of Report

December 31, 2018

Accession Number

0000071829-19-000021

A 10-K is a company's comprehensive annual report, required by the SEC. It includes audited financial statements, a description of the business, risk factors, and management's discussion of results. Learn more about 10-K filings →