John C Minge - Net Worth and Insider Trading
John C Minge Net Worth
The estimated net worth of John C Minge is at least $2 Million dollars as of 2025-07-24. John C Minge is the Director of NPK International Inc and owns about 230,287 shares of NPK International Inc (NPKI) stock worth over $2 Million. Details can be seen in John C Minge's Latest Holdings Summary section.
Disclaimer: The insider information is derived from SEC filings. The estimated net worth is based on the final shares held after open market or private purchases and sales of common stock with a transaction code of "P" or "S" on Form 4, assuming that John C Minge has not made any transactions after 2025-03-05 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

Transaction Summary of John C Minge
John C Minge Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, John C Minge owns 1 companies in total, including NPK International Inc (NPKI) .
Click here to see the complete history of John C Minge’s form 4 insider trades.
Insider Ownership Summary of John C Minge
Ticker | Company | Transaction Date | Type of Owner |
---|---|---|---|
NPKI | NPK International Inc | 2025-03-05 | director |
John C Minge Latest Holdings Summary
John C Minge currently owns a total of 1 stock. John C Minge owns 230,287 shares of NPK International Inc (NPKI) as of March 5, 2025, with a value of $2 Million.
Latest Holdings of John C Minge
Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
---|---|---|---|---|---|
NPKI | NPK International Inc | 2025-03-05 | 230,287 | 8.95 | 2,061,069 |
Holding Weightings of John C Minge
John C Minge Form 4 Trading Tracker
According to the SEC Form 4 filings, John C Minge has made a total of 5 transactions in NPK International Inc (NPKI) over the past 5 years, including 5 buys and 0 sells. The most-recent trade in NPK International Inc is the acquisition of 10,000 shares on March 5, 2025, which cost John C Minge around $53,800.
Insider Trading History of John C Minge
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John C Minge Trading Performance
GuruFocus tracks the stock performance after each of John C Minge's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by John C Minge is 27.75%. GuruFocus also compares John C Minge's trading performance to market benchmark return within the same time period. The performance of stocks bought by John C Minge within 3 months outperforms 5 times out of 6 transactions in total compared to the return of S&P 500 within the same period.
You can select different timeframes to see how John C Minge's insider trading performs compared to the benchmark.
Performance of John C Minge
John C Minge Ownership Network
Ownership Network List of John C Minge
Ownership Network Relation of John C Minge

John C Minge Owned Company Details
What does NPK International Inc do?
Who are the key executives at NPK International Inc?
John C Minge is the director of NPK International Inc. Other key executives at NPK International Inc include VP & President & Industrial Lori Briggs , VP & General Counsel Mary Celeste Fruge , and VP & Controller & PAO Gregg Piontek .
NPK International Inc (NPKI) Insider Trades Summary
Over the past 18 months, John C Minge made 1 insider transaction in NPK International Inc (NPKI) with a net purchase of 10,000. Other recent insider transactions involving NPK International Inc (NPKI) include a net sale of 17,709 shares made by Lori Briggs , a net purchase of 12,500 shares made by Joseph A Cutillo , and a net purchase of 4,000 shares made by Claudia Michel Meer .
In summary, during the past 3 months, insiders sold 19,722 shares of NPK International Inc (NPKI) in total and bought 16,500 shares, with a net sale of 3,222 shares. During the past 18 months, 19,722 shares of NPK International Inc (NPKI) were sold and 26,500 shares were bought by its insiders, resulting in a net purchase of 6,778 shares.
NPK International Inc (NPKI)'s detailed insider trading history can be found in Insider Trading Tracker table.
NPK International Inc Insider Transactions
John C Minge Mailing Address
Above is the net worth, insider trading, and ownership report for John C Minge. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, John C Minge's mailing address is: The Woodlands Tx 77381.