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Overview
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Business Summary
Filings
Ownership
Valuation
Ownership — NPK
Institutional Holdings
Insider Transactions
US Institutional Ownership
100.0%
Institution
Shares
Value
Ownership %
Change
Filing Date
BlackRock, Inc.
977.7K
$122.0M
--
+62.5K
2026-06-30
STATE STREET CORP
466.1K
$58.0M
--
+71.6K
2026-06-30
DIMENSIONAL FUND ADVISORS LP
315.8K
$39.0M
--
+1.5K
2026-06-30
VANGUARD CAPITAL MANAGEMENT LLC
224.9K
$28.0M
--
+11.0K
2026-06-30
Medina Value Partners, LLC
173.6K
$21.0M
--
+34.9K
2026-06-30
ADVISORY RESEARCH INC
161.8K
$20.0M
--
+14.1K
2026-06-30
GEODE CAPITAL MANAGEMENT, LLC
150.9K
$18.0M
--
+23.6K
2026-06-30
RENAISSANCE TECHNOLOGIES LLC
123.8K
$15.0M
--
-24.5K
2026-06-30
J. Goldman & Co LP
123.2K
$15.0M
--
-4.4K
2026-06-30
VANGUARD PORTFOLIO MANAGEMENT LLC
104.6K
$13.0M
--
+7.5K
2026-06-30
MORGAN STANLEY
80.2K
$10.0M
--
+10.3K
2026-06-30
MILLENNIUM MANAGEMENT LLC
74.6K
$9.0M
--
+36.4K
2026-06-30
Invesco Ltd.
66.7K
$8.0M
--
+7.0K
2026-06-30
JPMORGAN CHASE & CO
64.7K
$8.0M
--
+42.2K
2026-06-30
Bank of New York Mellon Corp
60.1K
$7.0M
--
+142
2026-06-30
NORTHERN TRUST CORP
52.8K
$6.0M
--
+4.6K
2026-06-30
Sixth Street Partners Management Company, L.P.
51.6K
$6.0M
--
--
2026-06-30
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
51.6K
$6.0M
--
+1.4K
2026-06-30
Qube Research & Technologies Ltd
44.1K
$5.0M
--
+35.2K
2026-06-30
GOLDMAN SACHS GROUP INC
38.5K
$4.0M
--
+13.2K
2026-06-30
TWO SIGMA INVESTMENTS, LP
36.6K
$4.0M
--
--
2026-06-30
STEEL PARTNERS HOLDINGS L.P.
36.5K
$4.0M
--
-20.0K
2026-06-30
VANGUARD FIDUCIARY TRUST CO
35.9K
$4.0M
--
+1.2K
2026-06-30
Topline Capital Management, LLC
32.3K
$4.0M
--
--
2026-06-30
Atom Investors LP
30.4K
$3.0M
--
+1.9K
2026-06-30
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