Who owns NPKIWhat NPKI owns — n/a

Who owns NPK International Inc.?

Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.

Institutional ownership of NPKI from SEC Form 13F filings across 256 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.

As of the 2026-06-30 reporting period, 256 institutions disclosed 78.0M shares of NPK International Inc. worth $1.24B — about 92.3% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.

256

13F holders

$1.24B

value, 2026 filers

92.3%

of shares outstanding (78.0M sh)

new positions (2026 filers)

Top institutional holders

ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of NPKI's shares outstanding

#	Manager	Shares	Value	% of fund	% of co.	Δ shares QoQ
1	BlackRock, Inc.	7.9M	$126.3M	0.0%	9.4%	+10.2%
2	AMERIPRISE FINANCIAL INC	4.5M	$71.4M	0.0%	5.3%	-20.2%
3	DIMENSIONAL FUND ADVISORS LP	3.6M	$57.9M	0.0%	4.3%	-8.6%
4	VANGUARD CAPITAL MANAGEMENT LLC	3.6M	$57.4M	0.0%	4.3%	+5.3%
5	AMERICAN CENTURY COMPANIES INC	3.1M	$49.8M	0.0%	3.7%	+2.8%
6	WASATCH ADVISORS LP	2.8M	$44.7M	0.3%	3.3%	-3.0%
7	GEODE CAPITAL MANAGEMENT, LLC	2.4M	$37.7M	0.0%	2.8%	+5.6%
8	ROYCE & ASSOCIATES LP	2.1M	$34.2M	0.3%	2.5%	+3.8%
9	STATE STREET CORP	2.0M	$32.1M	0.0%	2.4%	+3.0%
10	PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC.	1.7M	$27.7M	1.4%	2.1%	-4.4%
11	EMERALD ADVISERS, LLCNEW	1.6M	$25.0M	0.6%	1.9%	new
12	Thrivent Financial for Lutherans	1.5M	$24.1M	0.0%	1.8%	-9.1%
13	MASSACHUSETTS FINANCIAL SERVICES CO /MA/NEW	1.5M	$23.1M	0.0%	1.7%	new
14	Russell Investments Group, Ltd.	1.4M	$22.2M	0.0%	1.7%	-19.1%
15	MORGAN STANLEY	1.3M	$20.0M	0.0%	1.5%	-30.9%
16	Electron Capital Partners, LLC	1.2M	$18.6M	0.7%	1.4%	+6.3%
17	LOOMIS SAYLES & CO L P	1.2M	$18.3M	0.0%	1.4%	-2.3%
18	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	1.1M	$18.1M	0.0%	1.3%	-26.3%
19	PRUDENTIAL FINANCIAL INC	1.1M	$17.8M	0.0%	1.3%	-33.8%
20	Qube Research & Technologies Ltd	1.1M	$17.5M	0.0%	1.3%	-3.7%
21	EMERALD MUTUAL FUND ADVISERS TRUSTNEW	1.1M	$17.1M	0.6%	1.3%	new
22	MILLENNIUM MANAGEMENT LLC	1.0M	$16.7M	0.0%	1.2%	+560.8%
23	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	1.0M	$16.4M	0.0%	1.2%	-6.2%
24	Invesco Ltd.	1.0M	$15.9M	0.0%	1.2%	+272.7%
25	VANGUARD PORTFOLIO MANAGEMENT LLC	978,659	$15.6M	0.0%	1.2%	+13.6%

Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.