NPK International Inc.

NPKINYSE

$11.79-0.04 (-0.34%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

NPK International Inc. price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+4.4%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
BlackRock, Inc.	9.40%	$126M	0.00%	Not reported
Ameriprise Financial Inc	5.31%	$71.4M	0.01%	Not reported
Dimensional Fund Advisors LP	4.31%	$57.9M	0.01%	Not reported
Vanguard Capital Management LLC	4.27%	$57.4M	0.00%	Not reported
American Century Companies Inc	3.70%	$49.8M	0.02%	Not reported
Wasatch Advisors LP	3.33%	$44.7M	0.29%	Reduce 3.02%
Geode Capital Management, LLC	2.81%	$37.7M	0.00%	Not reported
Royce & Associates LP	2.54%	$34.2M	0.28%	Not reported
State Street Corp	2.39%	$32.1M	0.00%	Not reported
Punch & Associates Investment Management, Inc.	2.06%	$27.7M	1.37%	Reduce 4.39%
Emerald Advisers, LLC	1.86%	$25M	0.59%	New Not reported
Thrivent Financial for Lutherans	1.79%	$24.1M	0.04%	Reduce 9.14%
Massachusetts Financial Services Co	1.72%	$23.1M	0.01%	New Not reported
First Eagle Investment Management, LLC	1.71%	$22.9M	0.02%	Add 426.62%
Russell Investments Group, Ltd.	1.65%	$22.2M	0.02%	Not reported
Morgan Stanley	1.49%	$20M	0.00%	Not reported
Electron Capital Partners, LLC	1.38%	$18.6M	0.74%	Add 6.31%
Allianz Asset Management GmbH	1.37%	$16.8M	0.01%	Not reported
Loomis Sayles & Co L P	1.36%	$18.3M	0.02%	Reduce 2.32%
Arrowstreet Capital, Limited Partnership	1.34%	$18.1M	0.01%	Not reported
Prudential Financial Inc	1.32%	$17.8M	0.02%	Not reported
Qube Research & Technologies Ltd	1.30%	$17.5M	0.02%	Not reported
Emerald Mutual Fund Advisers Trust	1.27%	$17.1M	0.60%	New Not reported
Millennium Management LLC	1.24%	$16.7M	0.01%	Not reported
Charles Schwab Investment Management Inc	1.22%	$16.4M	0.00%	Not reported
Invesco Ltd.	1.18%	$15.9M	0.00%	Not reported
Vanguard Portfolio Management LLC	1.16%	$15.6M	0.00%	Not reported
Nuveen, LLC	1.09%	$14.6M	0.00%	Not reported
Panagora Asset Management Inc	0.95%	$12.7M	0.04%	Not reported
Northern Trust Corp	0.94%	$12.7M	0.00%	Not reported
Wellington Management Group LLP	0.94%	$12.6M	0.00%	Add 198.67%
Axiom Investors LLC	0.82%	$11.1M	0.10%	Reduce 5.67%
Ancora Advisors LLC	0.80%	$10.8M	0.21%	Not reported
Asset Management One Co., Ltd.	0.78%	$10.5M	0.03%	Add 30.44%
Goldman Sachs Group Inc	0.71%	$9.56M	0.00%	Not reported
First Sabrepoint Capital Management LP	0.71%	$9.55M	3.14%	Add 9.09%
Vanguard Fiduciary Trust Co	0.71%	$9.51M	0.00%	Not reported
Oberweis Asset Management Inc/	0.70%	$9.35M	0.19%	Add 13.39%
Silvercrest Asset Management Group LLC	0.68%	$9.19M	0.06%	Reduce 4.55%
Two Sigma Investments, LP	0.66%	$8.9M	0.01%	Not reported
Uniplan Investment Counsel, Inc.	0.64%	$8.66M	0.81%	Add 3.14%
First Trust Advisors LP	0.64%	$8.56M	0.01%	Not reported
Rice Hall James & Associates, LLC	0.58%	$7.82M	0.38%	Reduce 9.88%
Sei Investments Co	0.50%	$6.67M	0.01%	Not reported
ArrowMark Colorado Holdings LLC	0.47%	$6.37M	0.27%	Reduce 29.35%
Citadel Advisors LLC	0.43%	$5.78M	0.00%	Not reported
Cannell Capital LLC	0.43%	$5.73M	3.84%	Reduce 45.03%
Marathon Capital Management	0.41%	$5.47M	1.11%	Not reported
Marshall Wace, LLP	0.40%	$5.34M	0.00%	Not reported
OP Asset Management Ltd	0.39%	$5.3M	0.06%	Not reported

50 of 241 holders

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