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SIMPLEX TRADING, LLC

Position in NPKI — NPK International Inc.

CIK 1488542 CHICAGO, IL

Position in NPKI

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$15,416
+$11,432 QoQ
Shares Held
969
+252.4% QoQ
Ownership
0.001%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#219
of 256 holders
Holding Since
Jun 2020
15 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in NPKI Over Time

Shares Held

Position Value (USD)

Position in Building Products & Equipment

Industrials · as of Jun 30, 2026

SIMPLEX TRADING, LLC holds $7,367,802 across 17 Building Products & Equipment names. NPKI ranks #14 (0.2% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in NPKI

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15 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $15,416 969
2026-03-31 $3,984 275
2025-12-31 $102,857 8,629
2024-06-30 $86,415 10,399
2024-03-31 $128,472 17,794
2023-12-31 $139,884 21,067
2023-09-30 $304 44
2022-12-31 $20,310 4,894
2022-09-30 $5,163 2,049
2021-12-31 $22,899 7,789
2021-09-30 $330 100
2021-06-30 $346 100
2021-03-31 $14,855 4,731
2020-12-31 $192 100
2020-06-30 $2,662 1,194