Company · Ownership research

NPK International Inc. NPKI

CIK 0000071829 · CUSIP 651718504

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 651718504 (NPKI), not CUSIP 651718904 (NPKI), and does not merge CUSIPs.

This page lists the top 20 of 241 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$82.48M 6,919,616 shares	0.00%	+454.41K(+7.00%)Added	SEC filing ↗ Feb 12, 2026	▾
02	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$61.57M 5,165,210 shares	0.01%	-82.43K(-1.60%)Reduced	SEC filing ↗ Feb 17, 2026	▾
03	VANGUARD GROUP INC CIK 102909 · View history	$56.10M 4,706,012 shares	0.00%	-44.25K(-0.90%)Reduced	SEC filing ↗ Jan 29, 2026	▾
04	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$53.24M 4,466,550 shares	0.01%	-330.91K(-6.90%)Reduced	SEC filing ↗ Feb 12, 2026	▾
05	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$36.61M 3,071,640 shares	0.02%	+100.57K(+3.40%)Added	SEC filing ↗ Feb 13, 2026	▾
06	WASATCH ADVISORS LP CIK 814133 · View history	$26.41M 2,215,905 shares	0.16%	-65.96K(-2.90%)Reduced	SEC filing ↗ Feb 12, 2026	▾
07	ROYCE & ASSOCIATES LP CIK 906304 · View history	$26.05M 2,185,610 shares	0.26%	-256.67K(-10.50%)Reduced	SEC filing ↗ Feb 9, 2026	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$23.58M 1,977,755 shares	0.00%	-344.08K(-14.80%)Reduced	SEC filing ↗ Feb 9, 2026	▾
09	STATE STREET CORP CIK 93751 · View history	$23.57M 1,977,000 shares	0.00%	-54.28K(-2.70%)Reduced	SEC filing ↗ Feb 13, 2026	▾
10	PRUDENTIAL FINANCIAL INC CIK 1137774 · View history	$22.87M 1,918,912 shares	0.03%	+91.37K(+5.00%)Added	SEC filing ↗ Feb 13, 2026	▾
11	Russell Investments Group, Ltd. CIK 1692234 · View history	$22.42M 1,880,927 shares	0.02%	-52.60K(-2.70%)Reduced	SEC filing ↗ Feb 17, 2026	▾
12	PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. CIK 1238990 · View history	$22.09M 1,852,804 shares	1.29%	-41.92K(-2.20%)Reduced	SEC filing ↗ Feb 17, 2026	▾
13	MORGAN STANLEY CIK 895421 · Amended · View history	$20.18M 1,693,062 shares	0.00%	+50.16K(+3.10%)Added	SEC filing ↗ May 27, 2026	▾
14	Thrivent Financial for Lutherans CIK 314984 · View history	$18.93M 1,587,729 shares	0.03%	+1.59MNew	SEC filing ↗ Feb 5, 2026	▾
15	LOOMIS SAYLES & CO L P CIK 312348 · View history	$15.34M 1,287,030 shares	0.02%	-47.20K(-3.50%)Reduced	SEC filing ↗ Feb 12, 2026	▾
16	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$13.87M 1,163,775 shares	0.00%	+97.39K(+9.10%)Added	SEC filing ↗ Feb 13, 2026	▾
17	Nuveen, LLC CIK 1871926 · View history	$13.33M 1,118,057 shares	0.00%	+597.11K(+114.60%)Added	SEC filing ↗ Feb 12, 2026	▾
18	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$12.54M 1,052,242 shares	0.01%	+168.67K(+19.10%)Added	SEC filing ↗ Feb 13, 2026	▾
19	Pennant Select, LLC CIK 2011563 · View history	$12.09M 1,014,221 shares	6.40%	-48.04K(-4.50%)Reduced	SEC filing ↗ Feb 17, 2026	▾
20	ArrowMark Colorado Holdings LLC CIK 1483859 · View history	$11.66M 977,963 shares	0.26%	-69.09K(-6.60%)Reduced	SEC filing ↗ Feb 17, 2026	▾

Showing 20 / 241 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

241

Cancelled or null records excluded

Disclosed shares

75,172,147

Not deduplicated across managers

Disclosed value

$896.09M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

NPK International Inc. · Q4 2025

Explore all 241 reporting institutions.

This page includes 20 of 241 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

Download CSV
Earlier quarters
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 241 reporting institutions; totals use the complete disclosed data.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_institutional_holdings
{"action":"holders","cusip":"651718504","quarter":"2025Q4","type":"positions","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.