Your position in NPK is undoubtedly underwater. It hardly matters if your lastest purchase (as you claim) is in the money.
Since you have very low expectations as an investor, you probably should consider bonds rather than stocks.
A credit analyst would find NPK appealing because its operations will produce the necessary EBITDA to cover interest expenses far into the future. The company is prepared to support at least $100 million of debt.
Meanwhile, equity analysts ignore this company because its growth prospects are minimal, at best. Rational stock buyers aren't interested in no-growth companies unless there is a compelling story to spark interest. A large stock buyback, going private, getting taken over, or a huge special dividend are events that might catch a lot of interest.
If you have been a patient long-term investor in NPK, then you have received miserable returns in the biggest bull market in history. To defend the poor stock market performance of this company and ignore its prospects is to admit that your motives are emotional and not based on any rational investing principle.