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NPKI Insider Trading

Insider Ownership Percentage: 4.20%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $3,345,552.88

NPK International Insider Trading History Chart

This chart shows the insider buying and selling history at NPK International by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

NPK International Share Price & Price History

Current Price: $15.50
Price Change: ▼ Price Decrease of -0.025 (-0.16%)
As of 05/22/2026 03:59 PM ET

This chart shows the closing price history over time for NPKI up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

NPK International Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
5/15/2026Michael A. LewisDirectorSell2,013$15.30$30,798.90129,320View SEC Filing Icon  
4/9/2026Gregg PiontekCFOSell15,000$15.04$225,600.00819,326View SEC Filing Icon  
4/1/2026Gregg PiontekCFOSell35,000$14.51$507,850.00834,326View SEC Filing Icon  
3/16/2026Mary Celeste FrugéVPSell1,000$13.56$13,560.00265,213View SEC Filing Icon  
3/4/2026Gregg PiontekCFOSell108,590$14.07$1,527,861.30884,326View SEC Filing Icon  
2/23/2026Michael A. LewisDirectorSell2,013$14.31$28,806.03131,333View SEC Filing Icon  
11/24/2025Michael A. LewisDirectorSell2,013$12.00$24,156.00133,346View SEC Filing Icon  
9/3/2025Matthew LaniganCEOSell1,000$10.38$10,380.001,095,913View SEC Filing Icon  
8/25/2025Michael A. LewisDirectorSell2,013$10.33$20,794.29135,359View SEC Filing Icon  
8/22/2025Matthew LaniganCEOSell68,896$10.34$712,384.641,095,913View SEC Filing Icon  
8/11/2025Lori BriggsVPSell8,005$9.51$76,127.55252,621View SEC Filing Icon  
7/9/2025Lori BriggsVPSell8,005$8.57$68,602.85260,626View SEC Filing Icon  
6/16/2025Michael A. LewisDirectorSell2,013$8.60$17,311.80137,372View SEC Filing Icon  
6/6/2025Lori BriggsVPSell9,704$8.38$81,319.52268,631View SEC Filing Icon  
5/8/2025Joseph A CutilloDirectorBuy12,500$8.00$100,000.0012,500View SEC Filing Icon  
3/5/2025John C MingeDirectorBuy10,000$5.38$53,800.00230,287View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for NPK International (NYSE:NPKI)

80.81% of NPK International stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at NPKI by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

NPK International Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/19/2026NewEdge Advisors LLC10,152$0.15M0.0%-9.0%0.012%Search for SEC Filing on Google Icon
5/19/2026Bank of America Corp DE240,022$3.48M0.0%+21.4%0.284%Search for SEC Filing on Google Icon
5/18/2026Royal Bank of Canada2,404$35K0.0%-47.8%0.003%Search for SEC Filing on Google Icon
5/18/2026Electron Capital Partners LLC1,099,943$15.94M0.6%N/A1.302%Search for SEC Filing on Google Icon
5/18/2026Empowered Funds LLC49,740$0.72M0.0%-86.8%0.059%Search for SEC Filing on Google Icon
5/16/2026The Manufacturers Life Insurance Company 37,493$0.54M0.0%+50.4%0.044%Search for SEC Filing on Google Icon
5/16/2026Quantinno Capital Management LP26,527$0.38M0.0%+22.5%0.031%Search for SEC Filing on Google Icon
5/16/2026Lazard Asset Management LLC158,527$2.30M0.0%-33.2%0.188%Search for SEC Filing on Google Icon
5/15/2026Rice Hall James & Associates LLC545,077$7.90M0.4%-0.8%0.645%Search for SEC Filing on Google Icon
5/15/2026Punch & Associates Investment Management Inc.1,818,790$26.35M1.5%-1.8%2.154%Search for SEC Filing on Google Icon
5/15/2026Granahan Investment Management LLC401,658$5.82M0.3%-30.8%0.476%Search for SEC Filing on Google Icon
5/15/2026Entropy Technologies LP10,436$0.15M0.0%N/A0.012%Search for SEC Filing on Google Icon
5/14/2026Renaissance Technologies LLC362,167$5.25M0.0%-30.3%0.429%Search for SEC Filing on Google Icon
5/14/2026Public Employees Retirement System of Ohio46,293$0.67M0.0%-13.5%0.055%Search for SEC Filing on Google Icon
5/14/2026Arrowstreet Capital Limited Partnership1,539,088$22.30M0.0%+46.3%1.822%Search for SEC Filing on Google Icon
5/14/2026Sei Investments Co.837,157$12.13M0.0%+121.6%0.991%Search for SEC Filing on Google Icon
5/14/2026Walleye Capital LLC58,425$0.85M0.0%N/A0.069%Search for SEC Filing on Google Icon
5/14/2026State of Wyoming46,713$0.68M0.1%+85.2%0.055%Search for SEC Filing on Google Icon
5/13/2026Cetera Investment Advisers22,354$0.32M0.0%+6.5%0.026%Search for SEC Filing on Google Icon
5/8/2026PNC Financial Services Group Inc.15,199$0.22M0.0%-11.9%0.018%Search for SEC Filing on Google Icon
5/7/2026Dimensional Fund Advisors LP3,983,658$57.72M0.0%-10.8%4.717%Search for SEC Filing on Google Icon
5/7/2026Roubaix Capital LLC269,935$3.91M1.8%-53.1%0.320%Search for SEC Filing on Google Icon
5/5/2026Bank of New York Mellon Corp266,284$3.86M0.0%-0.8%0.315%Search for SEC Filing on Google Icon
5/5/2026Sigma Planning Corp60,000$0.87M0.0%N/A0.071%Search for SEC Filing on Google Icon
5/4/2026Calamos Advisors LLC353,627$5.12M0.0%-1.1%0.419%Search for SEC Filing on Google Icon
5/4/2026Principal Financial Group Inc.104,255$1.51M0.0%-9.9%0.124%Search for SEC Filing on Google Icon
5/1/2026Fifth Third Bancorp5,051$73K0.0%N/A0.006%Search for SEC Filing on Google Icon
4/30/2026Hsbc Holdings PLC52,549$0.76M0.0%+272.2%0.062%Search for SEC Filing on Google Icon
4/27/2026Y Intercept Hong Kong Ltd110,282$1.60M0.0%+4.4%0.131%Search for SEC Filing on Google Icon
4/25/2026Strs Ohio51,400$0.75M0.0%-7.6%0.061%Search for SEC Filing on Google Icon
4/24/2026MQS Management LLC13,938$0.20M0.1%+16.4%0.017%Search for SEC Filing on Google Icon
4/23/2026North Star Investment Management Corp.120,000$1.74M0.1%N/A0.142%Search for SEC Filing on Google Icon
4/22/2026Skylands Capital LLC164,300$2.38M0.3%-3.2%0.195%Search for SEC Filing on Google Icon
4/22/20261492 Capital Management LLC176,003$2.55M1.0%-0.9%0.208%Search for SEC Filing on Google Icon
4/22/2026Pictet Asset Management Holding SA19,825$0.29M0.0%+26.3%0.023%Search for SEC Filing on Google Icon
4/22/2026Sterling Capital Management LLC2,719$39K0.0%-42.5%0.003%Search for SEC Filing on Google Icon
4/21/2026Wasatch Advisors LP2,899,021$42.01M0.3%+30.8%3.434%Search for SEC Filing on Google Icon
4/21/2026Pinnacle Wealth Management Advisory Group LLC26,295$0.38M0.0%-10.9%0.031%Search for SEC Filing on Google Icon
4/20/2026OP Asset Management Ltd333,418$4.83M0.0%N/A0.395%Search for SEC Filing on Google Icon
4/17/2026XML Financial LLC12,485$0.18M0.0%N/A0.015%Search for SEC Filing on Google Icon
4/16/2026SG Americas Securities LLC95,553$1.39M0.0%+143.3%0.113%Search for SEC Filing on Google Icon
4/16/2026ARS Investment Partners LLC41,209$0.60M0.0%-5.9%0.049%Search for SEC Filing on Google Icon
4/16/2026Diversified Trust Co31,038$0.45M0.0%+13.1%0.037%Search for SEC Filing on Google Icon
3/20/2026Hsbc Holdings PLC14,120$0.17M0.0%N/A0.017%Search for SEC Filing on Google Icon
2/26/2026Aristides Capital LLC15,754$0.19M0.0%N/A0.019%Search for SEC Filing on Google Icon
2/18/2026Mercer Global Advisors Inc. ADV24,363$0.29M0.0%+6.5%0.029%Search for SEC Filing on Google Icon
2/18/2026Empowered Funds LLC375,623$4.48M0.0%-14.6%0.445%Search for SEC Filing on Google Icon
2/18/2026Zacks Investment Management31,194$0.37M0.0%-17.6%0.037%Search for SEC Filing on Google Icon
2/18/2026nVerses Capital LLC12,274$0.15M0.3%N/A0.015%Search for SEC Filing on Google Icon
2/18/2026Uniplan Investment Counsel Inc.536,108$6.39M1.8%-4.7%0.634%Search for SEC Filing on Google Icon
2/18/2026Voloridge Investment Management LLC83,245$0.99M0.0%N/A0.099%Search for SEC Filing on Google Icon
2/18/2026Wellington Management Group LLP506,597$6.04M0.0%-23.4%0.600%Search for SEC Filing on Google Icon
2/18/2026Tudor Investment Corp ET AL224,475$2.68M0.0%-55.7%0.266%Search for SEC Filing on Google Icon
2/18/2026Susquehanna Fundamental Investments LLC39,043$0.47M0.0%+146.4%0.046%Search for SEC Filing on Google Icon
2/18/2026Oxford Asset Management LLP15,035$0.18M0.1%N/A0.018%Search for SEC Filing on Google Icon
2/18/2026Millennium Management LLC106,487$1.27M0.0%-36.3%0.126%Search for SEC Filing on Google Icon
2/18/2026Man Group plc63,327$0.76M0.0%N/A0.075%Search for SEC Filing on Google Icon
2/18/2026Engineers Gate Manager LP102,979$1.23M0.0%+505.4%0.122%Search for SEC Filing on Google Icon
2/18/2026Balyasny Asset Management L.P.109,824$1.31M0.0%N/A0.130%Search for SEC Filing on Google Icon
2/18/2026Boothbay Fund Management LLC69,290$0.83M0.0%+7.1%0.082%Search for SEC Filing on Google Icon
2/18/2026Bridgeway Capital Management LLC625,623$7.46M0.2%-9.3%0.740%Search for SEC Filing on Google Icon
2/17/2026AQR Capital Management LLC174,503$2.08M0.0%+35.8%0.207%Search for SEC Filing on Google Icon
2/17/2026Cetera Investment Advisers20,997$0.25M0.0%-7.1%0.025%Search for SEC Filing on Google Icon
2/17/2026Northeast Financial Group Inc.65,902$0.79M0.2%-1.4%0.078%Search for SEC Filing on Google Icon
2/17/2026Lazard Asset Management LLC237,222$2.83M0.0%N/A0.281%Search for SEC Filing on Google Icon
2/17/2026Pennant Select LLC1,014,221$12.09M6.4%-4.5%1.200%Search for SEC Filing on Google Icon
2/17/2026ArrowMark Colorado Holdings LLC977,963$11.66M0.3%-6.6%1.157%Search for SEC Filing on Google Icon
2/17/2026Jump Financial LLC239,259$2.85M0.0%+9.8%0.283%Search for SEC Filing on Google Icon
2/17/2026Price T Rowe Associates Inc. MD61,736$0.74M0.0%+5.4%0.073%Search for SEC Filing on Google Icon
2/17/2026California State Teachers Retirement System80,829$0.96M0.0%+6.6%0.096%Search for SEC Filing on Google Icon
2/17/2026Russell Investments Group Ltd.1,880,927$22.42M0.0%-2.7%2.226%Search for SEC Filing on Google Icon
2/17/2026Punch & Associates Investment Management Inc.1,852,804$22.09M1.3%-2.2%2.193%Search for SEC Filing on Google Icon
2/17/2026Granahan Investment Management LLC580,447$6.92M0.3%+16.1%0.687%Search for SEC Filing on Google Icon
2/17/2026State of Wisconsin Investment Board93,891$1.12M0.0%+7.2%0.111%Search for SEC Filing on Google Icon
2/17/2026Graham Capital Management L.P.45,768$0.55M0.0%+24.6%0.054%Search for SEC Filing on Google Icon
2/17/2026Magnetar Financial LLC32,027$0.38M0.0%N/A0.038%Search for SEC Filing on Google Icon
2/17/2026Rothschild Wealth LLC138,500$1.65M0.2%N/A0.164%Search for SEC Filing on Google Icon
2/17/2026Rice Hall James & Associates LLC549,721$6.55M0.4%-4.2%0.651%Search for SEC Filing on Google Icon
2/16/2026Squarepoint Ops LLC58,656$0.70M0.0%+229.4%0.069%Search for SEC Filing on Google Icon
2/16/2026Verition Fund Management LLC175,974$2.10M0.0%+170.6%0.208%Search for SEC Filing on Google Icon
2/16/2026Panagora Asset Management Inc.669,303$7.98M0.0%-2.0%0.792%Search for SEC Filing on Google Icon
2/16/2026Mariner LLC10,664$0.13M0.0%N/A0.013%Search for SEC Filing on Google Icon
2/16/2026Kennedy Capital Management LLC184,290$2.20M0.0%-0.6%0.218%Search for SEC Filing on Google Icon
2/16/2026Landscape Capital Management L.L.C.11,015$0.13M0.0%N/A0.013%Search for SEC Filing on Google Icon
2/16/2026Arax Advisory Partners10,350$0.12M0.0%-10.0%0.012%Search for SEC Filing on Google Icon
2/16/2026Barclays PLC141,582$1.69M0.0%+27.5%0.168%Search for SEC Filing on Google Icon
2/13/2026Kestra Advisory Services LLC3,350$40K0.0%N/A0.004%Search for SEC Filing on Google Icon
2/13/2026The Manufacturers Life Insurance Company 24,929$0.30M0.0%-8.4%0.030%Search for SEC Filing on Google Icon
2/13/2026CANADA LIFE ASSURANCE Co9,596$0.11M0.0%-87.7%0.011%Search for SEC Filing on Google Icon
2/13/2026Jacobs Levy Equity Management Inc.477,318$5.69M0.0%-3.1%0.565%Search for SEC Filing on Google Icon
2/13/2026Charles Schwab Investment Management Inc.1,163,775$13.87M0.0%+9.1%1.377%Search for SEC Filing on Google Icon
2/13/2026Police & Firemen s Retirement System of New Jersey20,304$0.24M0.0%-12.1%0.024%Search for SEC Filing on Google Icon
2/13/2026State Street Corp1,977,000$23.57M0.0%-2.7%2.340%Search for SEC Filing on Google Icon
2/13/2026Boston Partners52,536$0.63M0.0%-30.5%0.062%Search for SEC Filing on Google Icon
2/13/2026Caitong International Asset Management Co. Ltd2,146$26K0.1%+26,725.0%0.003%Search for SEC Filing on Google Icon
2/13/2026UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC127,511$1.52M0.0%+2.7%0.151%Search for SEC Filing on Google Icon
2/13/2026Wells Fargo & Company MN102,735$1.23M0.0%+46.9%0.122%Search for SEC Filing on Google Icon
2/12/2026Wasatch Advisors LP2,215,905$26.41M0.2%-2.9%2.622%Search for SEC Filing on Google Icon
2/12/2026Jane Street Group LLC324,117$3.86M0.0%-23.0%0.384%Search for SEC Filing on Google Icon
2/12/2026MetLife Investment Management LLC45,353$0.54M0.0%+3.4%0.054%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
NPK International logo
NPK International Inc. provides products, rentals, and services primarily to the oil and natural gas exploration and production (E&P) industry. It operates through two segments, Fluids Systems and Industrial Solutions. The Fluids Systems segment provides drilling, completion, and stimulation fluids products and related technical services to customers primarily in the North America, Europe, the Middle East, and Africa, as well as other countries in the Asia Pacific and Latin America. The Industrial Solutions segment offers composite matting system rentals utilized for temporary worksite access; related site construction and services to customers in various markets, including power transmission, E&P, pipeline, renewable energy, petrochemical, construction, and other industries primarily in the United States and Europe; recyclable composite mats to customers worldwide; and access road construction, site planning and preparation, environmental protection, erosion control, and site restoration services. The company was formerly known as Newpark Resources, Inc. and changed its name to NPK International Inc. in December 2024. The company was incorporated in 1932 and is headquartered in The Woodlands, Texas.
Read More on NPK International

Today's Range

Now: $15.50
Low: $15.08
High: $15.52

50 Day Range

MA: $14.86
Low: $13.36
High: $16.39

52 Week Range

Now: $15.50
Low: $7.78
High: $16.50

Volume

753,927 shs

Average Volume

893,677 shs

Market Capitalization

$1.31 billion

P/E Ratio

33.69

Dividend Yield

N/A

Beta

1.3

Who are the company insiders with the largest holdings of NPK International?

NPK International's top insider investors include:
  1. Matthew Lanigan (CEO)
  2. Gregg Piontek (CFO)
  3. Lori Briggs (VP)
  4. Mary Celeste Fruge (VP)
  5. John C Minge (Director)
  6. Michael A Lewis (Director)
  7. Joseph A Cutillo (Director)
Learn More about top insider investors at NPK International.

Who are the major institutional investors of NPK International?

NPK International's top institutional shareholders include:
  1. Dimensional Fund Advisors LP — 4.72%
  2. Wasatch Advisors LP — 3.43%
  3. Punch & Associates Investment Management Inc. — 2.15%
  4. Arrowstreet Capital Limited Partnership — 1.82%
  5. Electron Capital Partners LLC — 1.30%
  6. Sei Investments Co. — 0.99%
Learn More about top institutional investors of NPK International stock.

Which institutional investors are selling NPK International stock?

During the previous quarter, NPKI stock was sold by these institutional investors:
  1. Dimensional Fund Advisors LP
  2. Empowered Funds LLC
  3. Roubaix Capital LLC
  4. Granahan Investment Management LLC
  5. Renaissance Technologies LLC
  6. Lazard Asset Management LLC
  7. Punch & Associates Investment Management Inc.
  8. Principal Financial Group Inc.
Within the previous year, company insiders that have sold NPK International company stock include:
  1. Matthew Lanigan (CEO)
  2. Gregg Piontek (CFO)
  3. Lori Briggs (VP)
  4. Mary Celeste Fruge (VP)
  5. Michael A Lewis (Director)
Learn More investors selling NPK International stock.

Which institutional investors are buying NPK International stock?

During the previous quarter, NPKI stock was acquired by institutional investors including:
  1. Electron Capital Partners LLC
  2. Wasatch Advisors LP
  3. Arrowstreet Capital Limited Partnership
  4. Sei Investments Co.
  5. OP Asset Management Ltd
  6. North Star Investment Management Corp.
  7. Sigma Planning Corp
  8. Walleye Capital LLC
During the last year, these company insiders have bought NPK International stock:
  1. John C Minge (Director)
  2. Joseph A Cutillo (Director)
Learn More investors buying NPK International stock.

NPK International Active Insiders

Matthew Lanigan
Matthew Lanigan
President and Chief Executive Officer
Lori Briggs
Lori Briggs
Executive Vice President Business Operations
Gregg Piontek
Gregg Piontek (Age 55)
CFO
3 recent trades
Michael A Lewis
Michael A Lewis
Director
2 recent trades
Mary Celeste Fruge
Mary Celeste Fruge
VP – General Counsel, Chief Compliance Officer, and Corporate Secretary
1 recent trades