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NPKI NPK International Inc. Insider Trading

Latest: President & CEO Sold $2.4M of Shares · Jun 2026

Multiple insiders have been active at NPK International Inc. (NPKI): 5 distinct insiders account for 3 buy filings and 4 sell filings as of Jun 2026. Its highest-significance filing in the last 90 days: President & CEO Matthew Lanigan sold $2.4M, transaction dated Jun 2026.

7 filings analyzed · Latest 2026-06-05

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Buys
3
Sells
4
Insiders
5
Direction
Net selling

NPK International Inc. leadership

General Counsel
M. Celeste Frugé — Vice President, General Counsel, Chief Compliance Officer and Corporate Secretary
Chair
Rose M. Robeson — Board Chair

Historically, stocks have lagged the S&P 500 by a median ~3% over the 90 days after a medium insider sell (n ≈ 4,738, 2024-2026). Past results don't predict the future. How we measure this ↗

June 2026
2026-06-05 10b5-1 Plan
medium
President & CEO
167,375 shares
$2,415,907
@ $14.43
Significance 5

Matthew Lanigan (President & CEO) sold 167,375 shares of NPKI for $2,415,907.49 under pre-arranged 10b5-1 plan adopted 2026-03-04

Matthew Lanigan, President & CEO of NPK International Inc., sold 167,375 shares at $14.43 on June 3, 2026, reducing his holdings from 422,074 to 254,699 shares—a reduction of 39.7% of his pre-transaction position. This sale was executed under a pre-arranged 10b5-1 trading plan adopted on March 4, 2026, meaning it was scheduled rather than discretionary. The transaction occurred when the stock was trading at $14.28 current price, approximately 13.4% below the 52-week high of $16.50. The company's fundamentals show strong growth with annual revenue growth of 27.4% and a P/E of 30.38, reflecting elevated market expectations. His prior sale at NPKI in August 2025 resulted in 30-day and 90-day returns of 5.6% and 8.4% respectively, suggesting limited timing predictability at this ticker.

April 2026
2026-04-03 10b5-1 Plan
medium
Senior Vice President and CFO
35,000 shares
$507,864
@ $14.51
Significance 5

CFO Piontek Gregg sells 35,000 NPKI shares at $14.51; holds 834,326 shares post-sale

Piontek Gregg, Senior Vice President and CFO of NPK International Inc., sold 35,000 shares (35.0K shares) on 2026-04-01 at $14.51, reducing his holdings by 4.0% from 869,326 to 834,326 shares. The transaction occurred just one month after two other NPKI sales on 2026-03-04, both of which showed modest positive 30-day returns (2.3% and 2.9% respectively), indicating the insider sold before recent price appreciation. The company shows solid fundamentals with annual revenue growth of +27.4%, a P/E of 5.48, and quarterly revenue of $68.8M with net income of $5.7M, suggesting reasonable valuation. The stock is currently -3.4% from its 52-week high of $14.93 and up 19.2% over 90 days, placing the transaction near but not at peak valuations during a sustained uptrend.

March 2026
2026-03-05 10b5-1 Plan
low
Senior Vice President and CFO
108,590 shares
$1,528,056
@ $14.07
Significance 3

NPK International CFO Gregg Piontek sold 108,590 shares for $1.5M under pre-arranged 10b5-1 plan (scheduled, not discretionary)

Gregg Piontek, Senior Vice President and CFO, executed 2 separate sales totaling 108,590 shares for $1,528,055.96 at a blended average price of $14.07 on 2026-03-04. The transaction reduces his post-transaction holdings to 884,326 shares, a -10.9% reduction from pre-transaction holdings of 992,916 shares. This sale was part of a pre-arranged 10b5-1 trading plan adopted on 2025-12-03, meaning it was scheduled in advance and not a discretionary decision by the insider at the time of execution. Investors should note that 10b5-1 plan sales remove timing discretion from the equation and therefore reflect pre-planned portfolio management rather than a real-time market signal.

August 2025
2025-08-26 10b5-1 Plan
low
President & CEO
68,896 shares
$712,536
@ $10.34
Significance 3

NPKI CEO Matthew Lanigan sells 68,896 shares ($712.5K) via pre-arranged 10b5-1 plan; retains 1.10M shares

Matthew Lanigan, President & CEO of NPK International Inc., sold 68,896 shares (68.9K shares) at $10.34 on 2025-08-22 for total value of $712,536.21 ($712.5K), reducing holdings from 1,164,809 shares (1.16M shares) to 1,095,913 shares (1.10M shares), a net change of -5.9% of pre-transaction holdings. This transaction was executed under a pre-arranged 10b5-1 trading plan adopted on 2025-05-23, meaning it is scheduled and automatic rather than discretionary. The CEO retains substantial equity ownership post-sale, with over 1 million shares remaining, indicating continued material alignment with shareholder interests.

May 2025
2025-05-20
medium
4,000 shares
$31,680
@ $7.92
Significance 5

Director Meer Claudia Michel bought 4,000 shares of NPKI at $7.92; holdings rise to 118.1K shares

Director Meer Claudia Michel purchased 4,000 shares at $7.92 on 2025-05-19, increasing holdings by 3.5% to 118.1K shares. The transaction occurred during a pronounced upswing: the stock has risen 39.4% over the prior 30 days and 16.7% over 90 days, now trading at $8.03, within 6.5% of its 52-week high of $8.59. However, significant headwinds cloud the outlook—annual revenue contracted 71.0% year-over-year, and the company was unprofitable over its most recent full fiscal year, despite posting $10.0M net income in the latest quarter. The insider's cross-ticker track record shows strong historical execution (100% 90-day win rate, +31.6% average 90-day return across 2 prior buys), but that success is not specific to NPKI and does not offset the company's structural revenue collapse and negative full-year profitability.

2025-05-08
medium
12,500 shares
$99,998
@ $8.00
Significance 4

Director Cutillo buys 12.5K shares of NPKI at $8.00; first purchase after all prior open-market activity was selling.

Joseph A. Cutillo, a director at NPK International Inc., made his first open-market purchase in recorded history on 2025-05-08, acquiring 12,500 shares at $8.00 for a total value of $99,997.50. This is structurally significant because across his entire open-market history (across all tickers), he has executed 1 prior buy with an average 30-day return of -6.6%, and 9 prior sells with a 90-day well-timed rate of 0.00%, indicating his sells have not historically captured market downturns effectively. The stock has since risen 62.8% over 30 days and is trading at $8.06, at the 52-week high. However, the company presents mixed fundamentals: while the latest quarter shows $10.0M net income on $64.8M revenue, annual revenue has declined 71.0% year-over-year and the company was unprofitable over its most recent full fiscal year, indicating structural challenges beneath the recent price recovery. This purchase's significance depends on whether it reflects a directional stance or routine investment activity, which warrants closer examination of insider motivations and broader company recovery prospects.

March 2025
2025-03-06
medium
10,000 shares
$53,800
@ $5.38
Significance 3

Director John C Minge purchases 10,000 shares of NPKI at $5.38; company reports -$174.3M net income, -71.0% revenue decline

Director MINGE JOHN C purchased 10,000 shares at $5.38 on 2025-03-05, increasing holdings from 220.3K to 230.3K shares. The purchase occurs against a deteriorating financial backdrop: the company reported net income of -$174.3M (unprofitable over the most recent full fiscal year), annual revenue growth of -71.0%, and a current stock price of $5.64 that sits -27.1% from the 52-week high. The modest 4.5% increase in holdings, combined with the company's severe profitability challenges and steep revenue contraction, places this transaction in a context of material operational strain rather than clear affirmation of near-term prospects.

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